CN208588661U - A kind of device for studying molecule photoisomerization - Google Patents
A kind of device for studying molecule photoisomerization Download PDFInfo
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- CN208588661U CN208588661U CN201821182940.7U CN201821182940U CN208588661U CN 208588661 U CN208588661 U CN 208588661U CN 201821182940 U CN201821182940 U CN 201821182940U CN 208588661 U CN208588661 U CN 208588661U
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Abstract
The utility model relates to spectrochemistry fields, a kind of device for studying molecule photoisomerization, including electrospray device, ion bunch device, ion gate, laser, deviating electrode group, linear electrode group, octupole ion guide, quadrupole mass filter, detector, vacuum chamber, drift chamber, gas feed and outlet, the deviating electrode group has 19 annular electrodes, angle is five degree between adjacent annular electrode, linear electrode group has 20 annular electrodes, the annular electrode of deviating electrode group II has through-hole, the laser of laser III transmitting can enter drift region along z negative direction by the through-hole；The laser beam of laser I transmitting can enter drift region by deviating electrode group I, and the laser beam of laser II transmitting can enter drift region by linear electrode group II；Electrospray device is made of outer tube, inner tube, baffle, air inlet and liquid inlet, and it is fluid passage between outer tube and inner tube that outer tube and inner tube, which are cylindrical and are coaxial nested configuration,.
Description
Technical field
The utility model relates to spectrochemistry field, a kind of especially a kind of research molecule with a variety of smooth excitation modes
The device of photoisomerization.
Background technique
Photoisomerization effect refers to the structure change that molecule occurs between isomerism under light excitation, can pass through analysis
Certain spectrum lines judge influence that light isomerization reaction is displaced each group in molecule or even each atom chemistry, usually
It is studied using mass spectrum or ion mobility spectrometry, sample molecule is usually injected to drift region in the form of ion, and pass through electricity
The electric field that pole generates makes its movement to carry out subsequent measurement.Prior art defect one: the prior art can not be in the same apparatus
Realize that laser is Chong Die with ion beam to interact from transverse direction and longitudinal direction；Prior art defect two: method of electrospraying is generallyd use
Sample molecule is injected into drift region, the mass flow of the electron spray of the prior art exports a kind of lower, research molecule light
The device of isomerization is able to solve problem.
Utility model content
To solve the above-mentioned problems, a kind of device for studying molecule photoisomerization of the utility model can be before the mass spectrum stage
It carries out isomer selection and the isomer in product is identified, there are a variety of smooth excitation modes；It can be used in
The photodegradation of molecular ion is studied, its charged products can be identified in terms of migration rate and quality two simultaneously；This is practical new
Type injector head has cricoid fluid passage, and liquid is applied upper high voltage with the shape of thin layer, so as to eject more
Uniform atomized drop improves the quality for entering the ion packet of drift region.
The technical scheme adopted by the utility model is
It is described it is a kind of study molecule photoisomerization device mainly include electrospray device, ion bunch device I, ion gate I,
Laser I, deviating electrode group I, linear electrode group I, ion gate II, laser II, linear electrode group II, deviating electrode group II,
Ion bunch device II, laser III, octupole ion guide, quadrupole mass filter, detector, vacuum chamber, drift chamber, gas
Body import and gas vent, xyz are three-dimensional system of coordinate, the ion bunch device I, ion gate I, deviating electrode group I, linear electrode
Group I, ion gate II, linear electrode group II, deviating electrode group II and ion bunch device II are sequentially connected, the ion bunch device I,
Ion gate I, deviating electrode group I, linear electrode group I, ion gate II, linear electrode group II, deviating electrode group II and ion bunch
Device II is respectively positioned on inside the drift chamber, the deviating electrode group I, linear electrode group I, linear electrode group II and deviating electrode group
II is that 40 millimeters of annular electrode forms by internal diameter, the deviating electrode group I, linear electrode group I, linear electrode group II and
The space that the annular electrode of deviating electrode group II is centrally formed is drift region, and the drift chamber has starting point and end, institute
It states starting point and end all has an aperture for by ion beam current, the gas feed to be located at the side of drift chamber end
Wall, the gas vent are located at the side wall of drift chamber starting point, the gas feed be connected in turn mass flow controller and
Air accumulator is equipped with buffer gas in air accumulator, and buffer gas is nitrogen or helium, can control drift by mass flow controller
The buffer gas flow in chamber is moved, drift chamber is discharged from gas vent in buffer gas, and buffer gas flow representative value is 0.3SLM,
SLM is every liter/min of calibrating gas, is capable of forming one and passes through the back flow of gas of ion bunch device I, and can prevent neutral point
Solvent molecule in son especially electron spray solution enters drift region, and drift chamber has vent valve, by adjusting buffer gas flow
The frequency of the Push And Release of flow and the vent valve, can control the air pressure in drift region, and the air pressure representative value is 1000
Pascal, the electrospray device are located at side outside the starting point of drift chamber, and the vacuum chamber is located at one outside the end of drift chamber
Side, the octupole ion guide, quadrupole mass filter and detector are successively located to linear array vacuum chamber, described
There is an aperture to be used for through ion beam current for the starting point of vacuum chamber, and vacuum chamber is connected with vacuum pump group, the vacuum pump group
The vacuum chamber can be vacuumized, vacuum degree is better than 10-5Mbar, after electrospray device generates the ion of testing molecule, from
Son successively passes through the ion bunch device I, ion gate I, deviating electrode group I, linear electrode group I, ion gate II, linear electrode group
II, deviating electrode group II, ion bunch device II, octupole ion guide and quadrupole mass filter reach detector, thus shape
At ion beam current path.The deviating electrode group I and deviating electrode group II all have 19 annular electrodes, annular electrode respectively
Perpendicular to yz plane, the angle between adjacent annular electrode is five degree, and in the deviating electrode group I, ion beam current is first passed through
The centers of ten annular electrodes be located in yz plane and be located on 1/8 circumference that radius is 50 millimeters, and with side clockwise
To equally spacedly arranging, ion beam current followed by the centers of nine annular electrodes be located in yz plane and be located at radius
It on 50 millimeters of 1/8 circumference, and equally spacedly arranges in a counterclockwise direction, in the deviating electrode group II, ion beam current is first
By the centers of ten annular electrodes be located in yz plane and be located on 1/8 circumference that radius is 50 millimeters, and with up time
Needle direction equally spacedly arranges, ion beam current followed by the centers of nine annular electrodes be located in yz plane and be located at
On 50 millimeters of radius of 1/8 circumference, and equally spacedly arrange in a counterclockwise direction；The deviating electrode group I and deviating electrode
One megohm of resistance is in series between adjacent annular electrode in group II to divide, the deviating electrode group I and deviating electrode
Group II provide voltage by two high voltage power supplies respectively；Linear electrode group I and linear electrode group II all have 20 respectively
Annular electrode, annular electrode is perpendicular to yz plane, and the annular electrode of deviating electrode group II has through-hole, laser III transmitting
Laser can enter drift region along z negative direction by the through-hole；The laser beam of laser I transmitting can pass through the deviation
Electrode group I enters drift region, and the laser beam of laser II transmitting can enter drift region by the linear electrode group II；
Ion bunch device I is formed by 50 pieces with a thickness of one millimeter of metal ring electrode, the ring for being 40 millimeters including ten internal diameters
Shape electrode and be linearly to be decreased to two millimeters of 40 annular electrodes, adjacent metal ring from 40 millimeters along z positive direction internal diameter
Shape electrode is separated with the insulating trip of a millimeters thick；The ion bunch device II of drift region end connection is by 40 along z positive direction
Internal diameter is to form from 40 millimeters of linear reduce to two millimeters of annular electrode；The electrospray device is by outer tube, inner tube, gear
Plate, air inlet and liquid inlet composition, the baffle can be by the side port sealing of said inner tube, and the outer tube and inner tube are equal
For cylinder, the internal diameter of outer tube is 3000 microns, and the outer diameter of inner tube is 2700 microns, and the outer tube is coaxial nested structure with inner tube
Type, is fluid passage between the outer tube and inner tube, air inlet and liquid inlet be separately connected outer tube outer wall and with the liquid
Channel connection, outer tube wall have dispersion the groove along outer tube axial direction, the groove enable to liquid be partially formed it is prominent
Shape is out to increase local electric field.The quantity of the groove of the outer tube wall is four to ten two, and grooved section shape is semicircle
Or square or triangle.
When test, electron spray generate ion gathered in ion bunch device I, ion gate I periodically turn on so that
Drift region leading portion where ion beam mutation deviating electrode group I, ion is acted on by drift field, to drift chamber end movement,
And in drift region filled with nitrogen or helium mutually collide；Ion is received after leaving drift region by ion bunch device II
Collection, passes sequentially through the aperture of drift chamber end, the aperture of vacuum chamber starting point, octupole ion guide, quadrupole quality mistake later
After filter, detector is eventually entered into.After ion passes through ion bunch device I, or pass through the drift after ion bunch device II
When region, ion can laterally be irradiated by laser, can axially be irradiated by laser when ion is among drift region, i.e., different
Excitation mode.
The utility model principle is that utility model device is mainly based upon ion mobility spectrometry measurement method, drift region
In have bending section, enable to laser beam Chong Die in axially or transversally generations with the ion of drift and interact with change from
The isomeric forms of son, cause the drift velocity of ion to change.
The working principle of ion mobility spectrometry: the ion packet formed is excited to float under the action of electric field by electrojet or light
It moves in region and moves, and moved with the buffer gas collisions in drift region, molecular isomer more compact in configuration
Fast speed, therefore can be distinguished from space and by it on the time with the biggish molecular isomer of configuration.In addition, of the invention
In the peculiar two sections of bending sections of drift region, bending section is made of a series of annular electrodes and has and special arrangement,
It can achieve the effect that converge ion again in drift region, principle is as follows: on the downside of first bending section, bending section
The distance between annular electrode is short, therefore electric field strength is big and the motion path of ion is short, therefore close to curved in an ion packet
The drift distance of the upper ion of ion ratio on the downside of tune is short, therefore moves to front, and in second bending section, bending
The distance between annular electrode of section downside is long, therefore electric field strength is small and the motion path of ion is long, therefore under bending section
The drift distance of the upper ion of the ion ratio of side is long, therefore ion upper in ion packet and on the lower converges again
It is poly-.The advantages of designing in this way, which is its rear end, deflects biggish ion bunch device without to deflected ion beam direction, to keep away
Exempt from the resolution ratio that ion loses the spectrum excessive, influence is avoided to collect during through ion bunch device.Energy of the present invention
The photoisomerization action spectrum of isomer of enough measurements by mobility selection, what device detected is the change of ion drift velocity
Change, and by the signal of measurement photoisomer and the relationship for being used for light activated optical maser wavelength, obtains photoisomerization action spectrum.It is logical
Function of the measurement photoisomer yield as optical maser wavelength is crossed, can obtain reflecting molecule absorption spectrum and depends on light wavelength lambda
Isomerization yield φ (λ) action spectrum, if yield φ (λ), independently of optical wavelength, photoisomerization action spectrum and light are inhaled
Receipts spectrum is similar, and the photoisomerization action spectrum of this form compensates for the deficiency of the existing spectral technology for molecular detection ion.
Utilize a kind of method and step that the device for studying molecule photoisomerization is studied are as follows:
High pure nitrogen is passed through by one, from the air inlet of electrospray device, and flow representative value is 1.0SLM, and SLM is Standard Gases
Every liter/min of body, while the solution comprising testing molecule being passed through from the liquid inlet of electrospray device, flow representative value is
2.0 ml/min；
Two, apply voltage, voltage range 1000V to 5000V, so that solution between the outer tube and inner tube of electrospray device
In part testing molecule become ionic species, and solution exports the drop to form atomization in electrospray device, adjusts voltage
The shape of liquid spray can be adjusted, a part of drop enters drift chamber by the aperture of drift chamber starting point；
Three, enter the ion of drift chamber when through ion bunch device I, first annular electrode of ion bunch device I and
Only apply DC potential on the last one annular electrode, applies direct current and exchange potential on other annular electrodes, DC potential
Range 150V to 300V, exchanges range 30V to the 50V of potential, and the phase phase of the exchange potential applied on adjacent annular electrode
Instead, the driving frequency for exchanging potential is 300kHz, is added to the DC potential on each annular electrode along z pros by divider
To successively decreasing, so that ion beam achievees the effect that convergence；
The direction of motion of the four, ion beams when drift region where deviating electrode group I is returned to after first deviateing the direction z
The direction z, next successively after linear electrode group I, ion gate II, linear electrode group II, next in deviating electrode group II
The direction of motion is returned to the direction z after first deviateing the direction z in the drift region at place；
Five, laser irradiations excite it to the ion packet being located in drift region, and laser beam cross-section is greater than 5 millis
Rice × 5 millimeters is can choose there are three types of light excitation mode so that entire ion packet is all irradiated to:
Mode one: ion 30 millimeters of positions after through ion gate I are shone by the laser pulse emitted by laser I
It penetrates, parent ion and the photoisomer generated by light excitation, light fragment ion are can be in time and sky after drift region
Between on be separated come, advantage is that entire ion packet can be before diffusion by relatively stronger laser irradiation；
Mode two: in drift region intermediate ion packet after the selection of the mobility of ion gate II, emitted by laser II
Laser irradiation.After ion gate I is opened and is transmitted through some ion packet, ion gate II opens 100 microseconds, in ion gate
The position 15mm after II, the laser pulse emitted by laser II overlap with selected ion, and advantage is can be to drift tube
In the photoisomer separated over time and space excited, generate by mobility selection isomers ion packet,
As a result, photoisomer signal can be observed under conditions of zero back end；
Mode three: the through-hole on annular electrode for pass through deviating electrode group II by the laser that laser III emits, along the side z
To being radiated on ion, advantage is to be suitable for being energized into excitation state from ground state and relax towards the molecular ion of ground state rapidly, at this
Under the conditions of kind, laser excitation can be used in establishing the CD-ROM drive dynamic balancing between ground state and excitation state；
Six, ion beams enter ion bunch device II, first annular electrode of ion bunch device II and the last one annular
Only apply DC potential on electrode, applies direct current on other annular electrodes and exchange potential, the range 150V of DC potential are arrived
300V, exchanges range 30V to the 50V of potential, and the opposite in phase of the exchange potential applied on adjacent annular electrode, driving frequency
For 500kHz, the DC potential linear decrease on each annular electrode is added to by divider, so that ion beam further converges
It is poly-；
Seven, ion beams pass sequentially through the aperture of drift chamber end and the aperture of vacuum chamber starting point enters vacuum chamber, ion
Beam reduces after the ion guide of octupole in the section of xz plane；
Eight, ion beams pass through quadrupole mass filter, the voltage value on quadrupole rod by adjusting quadrupole mass filter,
Voltage range 50V to 200V can carry out quality selection to ion according to the charge-mass ratio difference of ion；
Ion of nine, by quality selection enters detector, obtains corresponding signal；
Ten, analyze data, obtain power and the delay time for the ion signal that detector detects under different lasing conditions,
Obtain Isomers ion packet reach detector time distribution, obtain Isomers ion packet reach detector time with
The relationship of its charge-mass ratio obtains the pass for the optical maser wavelength that Isomers ion packet reaches the time of detector and light excitation uses
System, judge generate ion type and its from the relationship of different optical maser wavelengths, obtain photoisomerization action spectrum；
11, further analyze data, determine the relationship of the ionic mobility and molecular structure that measure.
The beneficial effects of the utility model are:
The utility model is used to study the photoisomerization of the molecular ion of gas phase, its advantage is that can advance in the mass spectrum stage
Row isomer selects and identifies to the isomer in product, has a variety of smooth excitation modes；The utility model
Also it can be used in studying the photodegradation of molecular ion, its electrification can be identified in terms of migration rate and quality two simultaneously and produced
Object；In addition, the utility model injector head has cricoid fluid passage, liquid is applied upper high voltage with the shape of thin layer, from
And more uniform atomized drop can be ejected, improve the quality for entering the ion packet of drift region.
Detailed description of the invention
It is further illustrated below with reference to the figure of the utility model:
Fig. 1 is utility model diagram；
Fig. 2 is the top view of electrospray device；
Fig. 3 is the side view of electrospray device.
In figure, 1. electrospray devices, 1-1. outer tube, 1-2. inner tube, 1-3. baffle, 1-4. air inlet, the liquid inlet 1-5.,
2. ion bunch device I, 3. ion gate I, 4. laser I, 5. deviating electrode group I, 6. linear electrode group I, 7. ion gate II, 8. swash
Light device II, 9. linear electrode group II, 10. deviating electrode group II, 11. ion bunch device II, 12. laser III, 13. octupoles from
Sub- guiding device, 14. quadrupole mass filters, 15. detectors, 16. vacuum chambers, 17. drift chambers, 18. gas feeds, 19. gases
Outlet.
Specific embodiment
It mainly include electrospray device (1), ion bunch device I (2), ion gate I if Fig. 1 is utility model diagram
(3), laser I (4), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), laser II (8), linear electrode
Group II (9), deviating electrode group II (10), ion bunch device II (11), laser III (12), octupole ion guide (13), four
Pole mass filter (14), detector (15), vacuum chamber (16), drift chamber (17), gas feed (18) and gas vent (19),
Xyz is three-dimensional system of coordinate, the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6),
Ion gate II (7), linear electrode group II (9), deviating electrode group II (10) and ion bunch device II (11) are sequentially connected, it is described from
Sub- beam buncher I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), linear electrode group
II (9), deviating electrode group II (10) and ion bunch device II (11) are respectively positioned on the drift chamber (17) inside, the deviating electrode
The ring that group I (5), linear electrode group I (6), linear electrode group II (9) and deviating electrode group II (10) are 40 millimeters by internal diameter
Shape electrode composition, the deviating electrode group I (5), linear electrode group I (6), linear electrode group II (9) and deviating electrode group II
(10) space that annular electrode is centrally formed be drift region, the drift chamber (17) have starting point and end, described
Beginning and end all have an aperture for by ion beam current, the gas feed (18) to be located at drift chamber (17) end
Side wall, the gas vent (19) are located at the side wall of drift chamber (17) starting point, and the gas feed (18) is connected with matter in turn
Flow controller and air accumulator are measured, buffer gas is housed in air accumulator, buffer gas is nitrogen or helium, passes through mass flow control
Device processed can control the buffer gas flow in drift chamber (17), and drift chamber (17) are discharged from gas vent (19) in buffer gas,
Buffer gas flow representative value is 0.3SLM, and SLM is every liter/min of calibrating gas, is capable of forming one by ion bunch device I
(2) back flow of gas, and the solvent molecule in neutral molecule especially electron spray solution can be prevented to enter drift region, it drifts about
Chamber (17) has vent valve, and the frequency of the Push And Release by adjusting buffer gas flow flow and the vent valve can control drift
Air pressure in region, the air pressure representative value are 1000 Pascals, and the electrospray device (1) is located at the starting of drift chamber (17)
Outer side is held, the vacuum chamber (16) is located at side outside the end of drift chamber (17), the octupole ion guide (13), quadrupole
Mass filter (14) and detector (15) are successively located to linear array vacuum chamber (16) inside, and the vacuum chamber (16) is risen
There is an aperture to be used for through ion beam current at beginning, and vacuum chamber (16) is connected with vacuum pump group, and the vacuum pump group can be right
The vacuum chamber (16) vacuumizes, and vacuum degree is better than 10-5Mbar, after electrospray device (1) generates the ion of testing molecule, from
Son successively passes through the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6), ion gate
II (7), linear electrode group II (9), deviating electrode group II (10), ion bunch device II (11), octupole ion guide (13) and
Quadrupole mass filter (14) reaches detector (15), to form ion beam current path.The deviating electrode group I (5) and partially
All have 19 annular electrodes respectively to electrode group II (10), annular electrode perpendicular to yz plane, adjacent annular electrode it
Between angle be five degree, in the deviating electrode group I (5), the center for ten annular electrodes that ion beam current first passes through is located at yz
In plane and it is located on 1/8 circumference that radius is 50 millimeters, and equally spacedly arranges in a clockwise direction, ion beam current connects
Get off by the centers of nine annular electrodes be located in yz plane and on 50 millimeters of radius of 1/8 circumference, and with inverse
Clockwise equally spacedly arranges, in the deviating electrode group II (10), in ten annular electrodes that ion beam current first passes through
The heart is located in yz plane and is located on 1/8 circumference that radius is 50 millimeters, and equally spacedly arranges in a clockwise direction, from
Beamlet stream followed by the centers of nine annular electrodes be located in yz plane and be located at 50 millimeters of radius of 1/8 circumference
On, and equally spacedly arrange in a counterclockwise direction；Adjacent ring in the deviating electrode group I (5) and deviating electrode group II (10)
One megohm of resistance is in series between shape electrode to divide, the deviating electrode group I (5) and deviating electrode group II (10) are respectively
Voltage is provided by two high voltage power supplies；Linear electrode group I (6) and linear electrode group II (9) all have 20 rings respectively
Shape electrode, annular electrode have through-hole, laser III (12) perpendicular to yz plane, the annular electrode of deviating electrode group II (10)
The laser of transmitting can enter drift region along z negative direction by the through-hole；The laser beam of laser I (4) transmitting can lead to
The deviating electrode group I (5) is crossed into drift region, the laser beam of laser II (8) transmitting can pass through the linear electrode
Group II (9) enters drift region；Ion bunch device I (2) is formed by 50 pieces with a thickness of one millimeter of metal ring electrode, including
The annular electrode and be linearly be decreased to two millimeters from 40 millimeters 40 along z positive direction internal diameter that ten internal diameters are 40 millimeters
A annular electrode, adjacent metal annular electrode are separated with the insulating trip of a millimeters thick；The ion bunch of drift region end connection
Device II (11) is to form from 40 millimeters of linear reduce to two millimeters of annular electrode along z positive direction internal diameter by 40；It is described
The quantity of the groove of outer tube (1-1) inner wall is four to ten two, and grooved section shape is semicircle or square or triangle.
If Fig. 2 is the top view of electrospray device, if Fig. 3 is the side view of electrospray device, the electrospray device (1)
It is made of outer tube (1-1), inner tube (1-2), baffle (1-3), air inlet (1-4) and liquid inlet (1-5), the baffle (1-3)
Can be by the side port sealing of said inner tube (1-2), the outer tube (1-1) and inner tube (1-2) they are cylinder, outer tube (1-
1) internal diameter is 3000 microns, and the outer diameter of inner tube (1-2) is 2700 microns, and the outer tube (1-1) and inner tube (1-2) are coaxial embedding
Configuration is covered, is fluid passage between the outer tube (1-1) and inner tube (1-2), air inlet (1-4) and liquid inlet (1-5) are respectively
Connection outer tube (1-1) outer wall is simultaneously connected to the fluid passage, and outer tube (1-1) inner wall is with dispersion along the recessed of outer tube axial direction
Slot, the groove enable to liquid being partially formed standing shape to increase local electric field.
It is described it is a kind of study molecule photoisomerization device mainly include electrospray device (1), ion bunch device I (2), from
It is cervical orifice of uterus I (3), laser I (4), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), laser II (8), straight
Line electrode group II (9), deviating electrode group II (10), ion bunch device II (11), laser III (12), octupole ion guide
(13), quadrupole mass filter (14), detector (15), vacuum chamber (16), drift chamber (17), gas feed (18) and gas go out
Mouth (19), xyz is three-dimensional system of coordinate, the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode
Group I (6), ion gate II (7), linear electrode group II (9), deviating electrode group II (10) and ion bunch device II (11) successively connect
It connects, it is the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), straight
Line electrode group II (9), deviating electrode group II (10) and ion bunch device II (11) are respectively positioned on the drift chamber (17) inside, described
Deviating electrode group I (5), linear electrode group I (6), linear electrode group II (9) and deviating electrode group II (10) are 40 by internal diameter
The annular electrode composition of millimeter, the deviating electrode group I (5), linear electrode group I (6), linear electrode group II (9) and deviation electricity
The space that the annular electrode of pole group II (10) is centrally formed is drift region, and the drift chamber (17) has starting point and end,
The starting point and end all have an aperture for by ion beam current, the gas feed (18) to be located at drift chamber (17)
The side wall of end, the gas vent (19) are located at the side wall of drift chamber (17) starting point, and the gas feed (18) successively connects
It is connected to mass flow controller and air accumulator, buffer gas is housed in air accumulator, buffer gas is nitrogen or helium, passes through quality
Flow controller can control the buffer gas flow in drift chamber (17), and drift chamber is discharged from gas vent (19) in buffer gas
(17), buffer gas flow representative value is 0.3SLM, and SLM is every liter/min of calibrating gas, is capable of forming one and is gathered by ion
The back flow of gas of beam device I (2), and the solvent molecule in neutral molecule especially electron spray solution can be prevented to enter drift region
Domain, drift chamber (17) have vent valve, and the frequency of the Push And Release by adjusting buffer gas flow flow and the vent valve can be controlled
Air pressure in drift region processed, the air pressure representative value are 1000 Pascals, and the electrospray device (1) is located at drift chamber (17)
Starting point outside side, the vacuum chamber (16) is located at side outside the end of drift chamber (17), the octupole ion guide
(13), quadrupole mass filter (14) and detector (15) are successively located to linear array vacuum chamber (16) inside, the vacuum
There is an aperture to be used for through ion beam current for the starting point of chamber (16), and vacuum chamber (16) is connected with vacuum pump group, the vacuum
Pump group can vacuumize the vacuum chamber (16), and vacuum degree is better than 10-5Mbar, when electrospray device (1) generates testing molecule
Ion after, ion successively passes through the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I
(6), ion gate II (7), linear electrode group II (9), deviating electrode group II (10), ion bunch device II (11), octupole ion draw
It leads device (13) and quadrupole mass filter (14) reaches detector (15), to form ion beam current path.The deviating electrode
Group I (5) and deviating electrode group II (10) all have 19 annular electrodes respectively, and annular electrode is adjacent perpendicular to yz plane
Angle between annular electrode is five degree, in the deviating electrode group I (5), ten annular electrodes that ion beam current first passes through
Center is located in yz plane and is located on 1/8 circumference that radius is 50 millimeters, and equally spacedly arranges in a clockwise direction,
Ion beam current followed by the centers of nine annular electrodes be located in yz plane and positioned at 50 millimeters of radius of 1/8 circle
Zhou Shang, and equally spacedly arranging in a counterclockwise direction, in the deviating electrode group II (10), ten rings that ion beam current first passes through
The center of shape electrode is located in yz plane and is located on 1/8 circumference that radius is 50 millimeters, and equidistant in a clockwise direction
Ground arrangement, ion beam current followed by the centers of nine annular electrodes be located in yz plane and positioned at 50 millimeters of radius
1/8 circumference on, and equally spacedly arrange in a counterclockwise direction；In the deviating electrode group I (5) and deviating electrode group II (10)
One megohm of resistance is in series between adjacent annular electrode to divide, the deviating electrode group I (5) and deviating electrode group II
(10) voltage is provided by two high voltage power supplies respectively；Linear electrode group I (6) and linear electrode group II (9) all have respectively
20 annular electrodes, annular electrode have through-hole, laser perpendicular to yz plane, the annular electrode of deviating electrode group II (10)
The laser of III (12) transmitting can enter drift region along z negative direction by the through-hole；The laser beam of laser I (4) transmitting
Drift region can be entered by the deviating electrode group I (5), the laser beam of laser II (8) transmitting can be by described straight
Line electrode group II (9) enters drift region；Ion bunch device I (2) is by 50 pieces with a thickness of one millimeter of metal ring electrode group
At, including ten internal diameters be 40 millimeters annular electrode and along z positive direction internal diameter be from 40 millimeters linearly be decreased to two milli
40 annular electrodes of rice, adjacent metal annular electrode are separated with the insulating trip of a millimeters thick；The connection of drift region end
Ion bunch device II (11) is linearly to reduce from 40 millimeters to two millimeters of annular electrode group along z positive direction internal diameter by 40
At；The electrospray device (1) is by outer tube (1-1), inner tube (1-2), baffle (1-3), air inlet (1-4) and liquid inlet (1-
5) it forms, the baffle (1-3) can be by the side port sealing of said inner tube (1-2), the outer tube (1-1) and inner tube (1-
It 2) is cylinder, the internal diameter of outer tube (1-1) is 3000 microns, and the outer diameter of inner tube (1-2) is 2700 microns, the outer tube (1-
1) and inner tube (1-2) is coaxial nested configuration, is fluid passage, air inlet (1- between the outer tube (1-1) and inner tube (1-2)
4) it is separately connected outer tube (1-1) outer wall with liquid inlet (1-5) and is connected to the fluid passage, outer tube (1-1) inner wall has
The groove along outer tube axial direction of dispersion, the groove enable to liquid being partially formed standing shape to increase local electric field.Institute
The quantity for stating the groove of outer tube (1-1) inner wall is four to ten two, and grooved section shape is semicircle or square or triangle.
When test, the ion that electron spray generates accumulation, ion gate I (3) in ion bunch device I (2) are periodically turned on
So that the drift region leading portion where ion beam mutation deviating electrode group I (5), ion is acted on by drift field, to drift chamber
(17) end movement, and in drift region filled with nitrogen or helium mutually collide；Ion quilt after leaving drift region
Ion bunch device II (11) collect, pass sequentially through later the aperture of drift chamber (17) end, the aperture of vacuum chamber (16) starting point,
After octupole ion guide (13), quadrupole mass filter (14), detector (15) are eventually entered into.When ion passes through ion bunch
After device I (2), or when by drift region after ion bunch device II (11), ion can laterally be irradiated by laser, when from
It can axially be irradiated by laser when son is among drift region, i.e., different excitation modes.
The utility model is used to study the photoisomerization of the molecular ion of gas phase, has a variety of smooth excitation modes, Neng Gouyong
In the photodegradation of research molecular ion, its charged products can be identified in terms of migration rate and quality two simultaneously；In addition, this
Utility model injector head has cricoid fluid passage, can eject more uniform atomized drop, improves and enters drift region
The quality of the ion packet in domain increases the signal-to-noise ratio for the ion signal that detector obtains.
Claims (2)
1. a kind of device for studying molecule photoisomerization mainly includes electrospray device (1), ion bunch device I (2), ion gate I
(3), laser I (4), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), laser II (8), linear electrode
Group II (9), deviating electrode group II (10), ion bunch device II (11), laser III (12), octupole ion guide (13), four
Pole mass filter (14), detector (15), vacuum chamber (16), drift chamber (17), gas feed (18) and gas vent (19),
Xyz is three-dimensional system of coordinate, the ion bunch device I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6),
Ion gate II (7), linear electrode group II (9), deviating electrode group II (10) and ion bunch device II (11) are sequentially connected, it is described from
Sub- beam buncher I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), linear electrode group
II (9), deviating electrode group II (10) and ion bunch device II (11) are respectively positioned on the drift chamber (17) inside, the deviating electrode
The ring that group I (5), linear electrode group I (6), linear electrode group II (9) and deviating electrode group II (10) are 40 millimeters by internal diameter
Shape electrode composition, the deviating electrode group I (5), linear electrode group I (6), linear electrode group II (9) and deviating electrode group II
(10) space that annular electrode is centrally formed be drift region, the drift chamber (17) have starting point and end, described
Beginning and end all have an aperture for by ion beam current, the gas feed (18) to be located at drift chamber (17) end
Side wall, the gas vent (19) are located at the side wall of drift chamber (17) starting point, and the gas feed (18) is connected with matter in turn
Flow controller and air accumulator are measured, buffer gas is housed in air accumulator, buffer gas is nitrogen or helium, passes through mass flow control
Device processed can control the buffer gas flow in drift chamber (17), and drift chamber (17) are discharged from gas vent (19) in buffer gas,
Buffer gas flow representative value is 0.3SLM, is capable of forming one and passes through the back flow of gas of ion bunch device I (2), and can hinder
Only the solvent molecule in neutral molecule especially electron spray solution enters drift region, and drift chamber (17) has vent valve, passes through
The frequency for adjusting the Push And Release of buffer gas flow flow and the vent valve, can control the air pressure in drift region, the air pressure
Representative value be 1000 Pascals, the electrospray device (1) is located at side outside the starting point of drift chamber (17), the vacuum chamber
(16) side outside the end of drift chamber (17), the octupole ion guide (13), quadrupole mass filter (14) and spy
It surveys device (15) and is successively located to linear array vacuum chamber (16) inside, there is an aperture to use for the starting point of the vacuum chamber (16)
In by ion beam current, vacuum chamber (16) is connected with vacuum pump group, and the vacuum pump group can take out the vacuum chamber (16) true
Sky, vacuum degree are better than 10-5Mbar, after electrospray device (1) generates the ion of testing molecule, ion successively passes through the ion
Beam buncher I (2), ion gate I (3), deviating electrode group I (5), linear electrode group I (6), ion gate II (7), linear electrode group II
(9), deviating electrode group II (10), ion bunch device II (11), octupole ion guide (13) and quadrupole mass filter (14)
It reaches detector (15), so that ion beam current path is formed,
It is characterized in that: the deviating electrode group I (5) and deviating electrode group II (10) all have 19 annular electrodes, ring respectively
For shape electrode perpendicular to yz plane, the angle between adjacent annular electrode is five degree, in the deviating electrode group I (5), ion beam
The center for ten annular electrodes that stream first passes through is located in yz plane and is located on 1/8 circumference that radius is 50 millimeters, and with
Clockwise equally spacedly arrange, ion beam current followed by nine annular electrodes center be located in yz plane and
It on 50 millimeters of radius of 1/8 circumference, and equally spacedly arranges in a counterclockwise direction, the deviating electrode group II (10)
In, the center for ten annular electrodes that ion beam current first passes through is located in yz plane and is located at 1/8 circle that radius is 50 millimeters
Zhou Shang, and equally spacedly arranging in a clockwise direction, ion beam current followed by the centers of nine annular electrodes be located at yz
In plane and on 50 millimeters of radius of 1/8 circumference, and equally spacedly arrange in a counterclockwise direction；The deviating electrode
One megohm of resistance is in series between adjacent annular electrode in group I (5) and deviating electrode group II (10) to divide, it is described inclined
Voltage is provided by two high voltage power supplies respectively to electrode group I (5) and deviating electrode group II (10)；Linear electrode group I (6) and
Linear electrode group II (9) all has 20 annular electrodes respectively, and annular electrode is perpendicular to yz plane, deviating electrode group II (10)
Annular electrode have through-hole, laser III (12) transmitting laser can enter drift region along z negative direction by the through-hole
Domain；The laser beam of laser I (4) transmitting can enter drift region, laser II (8) hair by the deviating electrode group I (5)
The laser beam penetrated can enter drift region by the linear electrode group II (9)；Ion bunch device I (2) is by 50 pieces of thickness
Formed for one millimeter of metal ring electrode, including ten internal diameters be 40 millimeters annular electrode and along z positive direction internal diameter be
Linearly it is decreased to two millimeters of 40 annular electrodes, the insulating trip of one millimeters thick of adjacent metal annular electrode from 40 millimeters
It separates；The ion bunch device II (11) of drift region end connection is linear from 40 millimeters along z positive direction internal diameter by 40
It reduces to two millimeters of annular electrode and forms；The electrospray device (1) by outer tube (1-1), inner tube (1-2), baffle (1-3),
Air inlet (1-4) and liquid inlet (1-5) composition, the baffle (1-3) can be close by a side ports of said inner tube (1-2)
Envelope, the outer tube (1-1) and inner tube (1-2) are cylinder, and the internal diameter of outer tube (1-1) is 3000 microns, outside inner tube (1-2)
Diameter is 2700 microns, and the outer tube (1-1) and inner tube (1-2) are coaxial nested configuration, the outer tube (1-1) and inner tube (1-2)
Between be fluid passage, air inlet (1-4) and liquid inlet (1-5) are separately connected outer tube (1-1) outer wall and lead to the liquid
Road connection, outer tube (1-1) inner wall have the groove along outer tube axial direction of dispersion, and the groove enables to liquid being partially formed
Standing shape is to increase local electric field.
2. a kind of device for studying molecule photoisomerization according to claim 1, it is characterized in that: in the outer tube (1-1)
The quantity of the groove of wall is four to ten two, and grooved section shape is semicircle or square or triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821182940.7U CN208588661U (en) | 2018-07-13 | 2018-07-13 | A kind of device for studying molecule photoisomerization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821182940.7U CN208588661U (en) | 2018-07-13 | 2018-07-13 | A kind of device for studying molecule photoisomerization |
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| Publication Number | Publication Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760637A (en) * | 2018-07-13 | 2018-11-06 | 金华职业技术学院 | A kind of device of research molecule photoisomerization |
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- 2018-07-13 CN CN201821182940.7U patent/CN208588661U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760637A (en) * | 2018-07-13 | 2018-11-06 | 金华职业技术学院 | A kind of device of research molecule photoisomerization |
| CN108760637B (en) * | 2018-07-13 | 2023-11-21 | 金华职业技术学院 | Device for researching molecular photoisomerization |
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