CN101488559A - Controlling method for benzophenanthrene derivative molecular orientation - Google Patents
Controlling method for benzophenanthrene derivative molecular orientation Download PDFInfo
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- CN101488559A CN101488559A CNA2008101260246A CN200810126024A CN101488559A CN 101488559 A CN101488559 A CN 101488559A CN A2008101260246 A CNA2008101260246 A CN A2008101260246A CN 200810126024 A CN200810126024 A CN 200810126024A CN 101488559 A CN101488559 A CN 101488559A
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Abstract
The invention discloses a control method for molecular orientation of benzophenanthrene derivates, relates to a control method for the molecular orientation of a circular liquid crystal and is suitable for manufacturing organic luminescent devices and organic photovoltaic devices. The method comprises the following steps: arranging an orientation substrate which is coated with a benzophenanthrene derivate film on a temperature-controlled heating stage; raising the temperature to 0.1 to 20 DEG C above the clearing point temperature of benzophenanthrene molecules and maintaining the temperature for one minute to one hour; lowering the temperature to 0.1 to 20 DEG C below the clearing point temperature of the benzophenanthrene molecules at the speed of 0.1-130 DEG C/min and maintaining the temperature for one minute to one hour; and continuing to lower the temperature; wherein the subsequent temperature reduction process comprises the following steps: selecting 1 to 5 temperature values from high to low between the range of 20 DEG C below the clearing point temperature and the crystallizing point and setting standing time of one minute to ten hours respectively. With the method adopted, the benzophenanthrene derivate molecules obtain ideal vertical orientation structures on various substrates.
Description
Technical field
The present invention relates to a kind of orientation control method of discotic liquid-crystalline molecules, be applicable to the making of organic luminescent device and organic photovoltaic devices.
Background technology
Discotic liquid-crystalline molecules can be by the electron cloud enrichment π-π of centronucleus interact and be self-assembled into the column phase structure, thereby have quasi-one-dimensional conductive properties, the column of arranging has high carrier mobility mutually in theory in order.As far back as people such as Adam in 1994 at " Fast photoconduction in the highly orderedcolumnar phase of a discotic liquid crystal ", D.Adam, P.Schuhmacher, J.Simmerer, L.Haussling, K.Siemensmeyer, K.H.Etzbachi, H.Ringsdorf, D.HaarerNature, 371,141-143,1994 have reported that disklike molecule can obtain higher carrier mobility in column in mutually, they are at a kind of benzophenanthrene six substituted thioethers derivative (hexahexylthiotriphenylene, HHST) obtained excellent photoconductive effect in, the carrier mobility of the formed H phase of this material is up to 0.1cm
2V
-1s
-1, near organic single-crystal.Therefore, the discotic mesogenic material is a kind of potential good organic optoelectronic material, can be used as nm-class conducting wire and is widely applied in the photoelectric device, as light-emitting diode, photovoltaic device, thin-film transistor etc.
As a rule the discotic mesogenic material is when making device, and the stacked arrangement of interior molecules is a random distribution, and this lack of alignment can not be optimized the performance of material to greatest extent.Desire improves the phase structure that carrier mobility not only needs to control molecule, also needs the further orientations of control molecule, could make the performance of application device optimize to greatest extent.Therefore, how to control the plate-like liquid crystal molecular orientation, the discotic mesogenic material can effectively be held on than the both macro and micro yardstick, particularly making nano level ordered structure becomes key in the manufacturing technology.
Vertical plane orientation is a kind of in the discotic mesogenic type of alignment.So-called vertical plane orientation, " the dish plane " that be about to disklike molecule is placed in parallel in substrate surface.Desire obtains the vertical plane orientation of disklike molecule column phase, the disklike molecule that is about to form the column phase is piled into " dish plane " and is placed in parallel in substrate surface, and the central axis direction of molecular columns is perpendicular to substrate such as document: " Control of the Homeotropic Order of Discotic Hexa-peri-hesabenzocoronenes " W.Pisula
Bassem El Hamaoui, Mark D.Watson, Tadeusz Pakula, and Klaus M ü llen, Advanced Functional Materials, 15:893-904, shown in Figure 1 in 2005.Present guiding liquid crystal obtains orientation on substrate influencing factor is still not fully aware of.
The method that people once were orientated with nematic liquid crystal material use auxiliary layer is attempted discotic mesogenic, but these auxiliary oriented layer can not help the discotic mesogenic material to form orientation texture effectively.Auxiliary in addition oriented layer often can not tolerate the required heat treatment process of element manufacturing, and may be as the performance of impurity effect device.
People such as Pisula are in 2005 " Control of the Homeotropic Order of Discotic Hexa-peri-hesabenzocoronenes ", W.Pisula,
Bassem El Hamaoui, Mark D.Watson, Tadeusz Pakula, and Klaus M ü llen, Advanced Functional Materials, 15:893-904,2005 had once studied a kind of six alkyl ether side chains replaces Liu Ben Bing guan derivative, and makes this material obtain the vertical plane orientation in the double-basis sheet sandwich that tin indium oxide (ITO) glass substrate constitutes with heat treatment method.
People such as Terasawa were in " Strong tendency towards homeotropic alignment in ahexagonal columnar mesophase of fluoroalkylated triphenylenes " in 2003, Naohiro Terasawa, Hirosato Monobe, Kenji Kiyohara and Yo Shimizu, Chemical Communication, 1678-1679,2003 propose the alkyl side chain of discotic liquid-crystalline molecules periphery is made fluorination treatment, to help it and form the vertical plane orientation, they have reported the alkyl side chain benzophenanthrene derivative (F of fluorinated
4And F
6) constitute the sandwich of double-deck substrate with being coated with polyimides (polyimide), softex kw (CTAB), tin indium oxide (ITO) glass substrate of etc.ing, and obtain vertical plane by the molecule self assembly and be orientated.Also have United States Patent 7,291,727 studies show that in addition, replace the porphyrin quasi-molecule through the alkyl side chain of fluorination treatment and also can obtain the vertical plane orientation.
" Alignment behavior for novel triphenylenecompounds possessing fluoroalkylated side chains on modified substrates " NaohiroTerasawa that people such as Terasawa in 2006 deliver, Nobutaka Tanigaki, Hirosato Monobe, Kenji Kiyohara, Journal of FluorineChemistry, 127,1096-1104,2006 have reported again different length carbochain (carbon chain lengths n=4 in the side chain, 5,6,7,9) six alkoxy substituted and phenanthrene derivatives are its corresponding to be fluoridized the orientation behavior that replaces the side chain material and compares research, multiple substrate has been selected in research: be coated with comprising being coated with polyimides, CTAB, ITO, the glass substrate of polytetrafluoroethylene (PTFE), and then constitute the sandwich of double-deck substrate, study the assembling orientation behavior of this material by heat treatment method, result of study shows that heat treatment only can make the benzophenanthrene derivative with side chain of fluoridizing obtain the vertical plane orientation texture, but can not make six alkoxyls (carbon chain lengths n=4 in the side chain, 5,6,7,9) the benzophenanthrene derivative of Qu Daiing obtains the vertical plane orientation on these orientation substrates.
Yet there are no the report of the successful vertical plane orientation of six alkoxy substituted and phenanthrene derivatives up to now; Alkoxyl is not seen the trial that the vertical plane orientation is arranged as yet with ester group mixing side chain benzophenanthrene derivative molecular.
Summary of the invention
Technical problem to be solved by this invention is, how to make six alkoxyl benzo phenanthrene derivatives, alkoxyl obtain desirable vertical plane orientation texture, a kind of control method of benzophenanthrene derivative molecular orientation is provided with ester group mixing side chain benzophenanthrene derivative by heat treatment.Control benzophenanthrene derivative molecular is arranged, and makes it form regular vertical plane oriented film.
The present invention is by the interaction between control benzophenanthrene derivative molecular; By benzophenanthrene derivative molecular different dispersing mode on substrate, change the influence of substrate to molecule; By the accumulation process (arrange speed and arrangement time) of benzophenanthrene derivative molecular in the control film when the phase transformation, to reach the purpose of control molecules align regularity jointly.By the temperature of control break film, and be aided with the arrangement that certain temperature rate is controlled molecule in the film.
Technical scheme of the present invention:
A kind of control method of benzophenanthrene derivative molecular orientation, the step of this control method:
Step 1 places the orientation substrate that is coated with the benzophenanthrene derivative film on the hot platform of temperature control, when being warming up to the scope of above 0.1～20 ℃ of benzophenanthrene derivative molecular clearing point temperature, stops 1min～1h.
Step 2 with the cooling of the speed of 0.1～130 ℃/min, when being cooled under the benzophenanthrene derivative molecular clearing point temperature 0.1～20 ℃, stops 1min～100h; Continue temperature-fall period subsequently.
Rate of temperature fall can be set according to different situation needs, can 0.1 ℃/min～130 ℃/speed of min is cooled to preset temperature.
Temperature-fall period subsequently described in the step 3, step 2 is, below clearing point temperature 20 ℃ in the interval of crystallization temperature, select 1～5 temperature value from high to low successively, and time of staying 1min～10h be set respectively, whole temperature-fall period is the staged cooling.
Benzophenanthrene derivative used in the present invention is that six alkoxyl benzo phenanthrene derivatives and alkoxy are mixed side chain benzophenanthrene derivative, as four alkoxyls, two ester group benzophenanthrene derivatives.Typical six alkoxyl benzo phenanthrene derivatives and four alkoxyls, two ester group benzophenanthrene derivative molecular structural formulas are respectively:
Six alkoxyl benzo phenanthrene derivatives 3,6,10,11-four alkoxyls-2,7 diester benzophenanthrene derivative
Wherein R is C
nH
2n+1R wherein
1, R
2Be C
nH
2n+1
Six alkoxyl benzo phenanthrene derivatives are to have six six alkoxyl benzo phenanthrene derivatives with equal length alkoxyl side chain.
Six alkoxyl benzo phenanthrene derivatives are that alkoxyl side chain, molecular structure with different length are six alkoxyl benzo phenanthrene derivatives of unsymmetric structure.
It is that the alkoxy with equal length alkoxyl side chain or lateral chain of ester group is mixed side chain benzophenanthrene derivative that alkoxy is mixed side chain benzophenanthrene derivative, and the alkoxy that perhaps has different length alkoxyl side chain or lateral chain of ester group is mixed side chain benzophenanthrene derivative.
It is to have one to multiple alkoxyl side chain that alkoxy is mixed side chain benzophenanthrene derivative, and has the alkoxy mixing side chain benzophenanthrene derivative of a lateral chain of ester group of as many as.For example, four alkoxyls, two ester group benzophenanthrene derivatives.
The benzophenanthrene derivative molecular has the benzophenanthrene derivative that benzophenanthrene structure kernel, periphery have 2～6 side chains in the middle of being.
Orientation substrate used in the present invention is: glass, slide, ito glass, quartz, quartz glass, silicon chip, metallic film or organic film coated substrates.
Benzophenanthrene derivative oriented layer of the present invention prepares on substrate surface and keeps upper surface is Free Surface, or preparation is between two substrates.
Beneficial effect of the present invention: control the assembling of benzophenanthrene derivative molecular among the present invention by the heat-treat condition that felicity condition is set, make six alkoxyl benzo phenanthrene derivatives mix side chain benzophenanthrene derivant material with alkoxy and on multiple substrate, all obtained desirable vertical plane orientation.Point out among the present invention, by suitable temperature control heat treatment, can be so that a series of benzophenanthrene derivative molecular six alkoxyl benzo phenanthrene derivatives mix side chain benzophenanthrene derivative with alkoxy, as: obtain desirable vertical plane orientation texture on the multiple substrates such as slide, ito glass, quartz.By heat treatment, six alkoxyl benzo phenanthrene derivatives mix side chain benzophenanthrene derivative with alkoxy can form vertical plane orientation texture film on the ito glass surface, make six alkoxyl benzo phenanthrene derivatives mix side chain benzophenanthrene derivative with alkoxy and have good application prospects in the preparation of photoelectric device.
Description of drawings
Among Fig. 1 embodiment 1, when the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on slide, the texture that under the cross-polarized light condition, forms.
Among Fig. 2 embodiment 1, when the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on slide, the microscope picture under natural daylight.
Among Fig. 3 embodiment 1, the two-dimentional XRD ray diffraction pattern of vertical incidence HAT5 oriented film on slide.
Among Fig. 4 embodiment 2, when the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on the ito glass substrate, the texture that under the cross-polarized light condition, forms.
Among Fig. 5 embodiment 2, when the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on the ito glass substrate, the microscope picture under natural daylight.
Among Fig. 6 embodiment 3, when the HAT5 film slowly is cooled to 70 ℃ with the speed of 0.5 ℃/min on quartz substrate, the texture that under the cross-polarized light condition, forms.
Among Fig. 7 embodiment 3, when the HAT5 film slowly is cooled to 70 ℃ with the speed of 0.5 ℃/min on quartz substrate, the microscope picture under natural daylight.
Among Fig. 8 embodiment 4, when the TPE film slowly is cooled to 130 ℃ with the speed of 0.5 ℃/min on slide, the texture that under the cross-polarized light condition, forms.
Among Fig. 9 embodiment 4, when the TPE film slowly is cooled to 130 ℃ with the speed of 0.5 ℃/min on slide, the microscope picture under natural daylight.
Among Figure 10 embodiment 4, the two-dimentional XRD ray diffraction pattern of vertical incidence TPE oriented film on slide.
Among Figure 11 embodiment 4, when the TPE film slowly is cooled to 34 ℃ with the speed of 0.5 ℃/min on slide, the texture that under the cross-polarized light condition, forms.
Among Figure 12 embodiment 4, when the TPE film slowly is cooled to 34 ℃ with the speed of 0.5 ℃/min on slide, the microscope picture under natural daylight.
Among Figure 13 embodiment 5, when the TPE film slowly is cooled to 110 ℃ with the speed of 0.5 ℃/min on the ito glass substrate,, the texture that under the cross-polarized light condition, forms.
Among Figure 14 embodiment 5, when the TPE film slowly is cooled to 110 ℃ with the speed of 0.5 ℃/min on the ito glass substrate, the microscope picture under natural daylight.
Among Figure 15 embodiment 5, when the TPE film slowly is cooled to 35 ℃ with the speed of 10 ℃/min on the ito glass substrate, the texture that under the cross-polarized light condition, forms.
Among Figure 16 embodiment 5, when the TPE film slowly is cooled to 35 ℃ with the speed of 10 ℃/min on the ito glass substrate, the microscope picture under natural daylight.
Among Figure 17 embodiment 6, when the TPE film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on quartz substrate, the texture that under the cross-polarized light condition, forms.
Among Figure 18 embodiment 6, when the TPE film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min on quartz substrate, the microscope picture under natural daylight.
Among Figure 19 embodiment 6, when the TPE film slowly is cooled to 30 ℃ with the speed of 0.5 ℃/min on quartz substrate, the texture that under the cross-polarized light condition, forms.
Among Figure 20 embodiment 6, when the TPE film slowly is cooled to 30 ℃ with the speed of 0.5 ℃/min on quartz substrate, the microscope picture under natural daylight.
Among Figure 21 embodiment 7, when the TPE film slowly is cooled to 40 ℃ with the speed of 5 ℃/min on glass substrate, the texture that under the cross-polarized light condition, forms.
Among Figure 22 embodiment 7, when the TPE film slowly is cooled to 40 ℃ with the speed of 5 ℃/min on glass substrate, at the following microscope picture of natural daylight.
Embodiment
To the process that the orientation molecular film is heat-treated, can regard the process of molecules align in the control molecular film as.Stop the preceding paragraph time by the hot platform of control temperature control in a certain temperature, make the benzophenanthrene derivative molecular under the condition of specific molecular kinetic energy and intermolecular energy, organize arrangement.By the temperature rate of the hot platform of control temperature control, the speed that the assembling of control benzophenanthrene derivative molecular is arranged improves the alignment degree of its arrangement.At first with certain speed sample thin film is heated to the above temperature of its clearing point (this moment, the benzophenanthrene derivative molecular was the isotropism attitude), with certain rate of temperature fall cooling, the range of choice of rate of temperature fall is 0.1～130 ℃/min subsequently; In temperature-fall period, set certain time of staying at a certain temperature, its stopping temperature under benzophenanthrene derivative molecular clearing point temperature 0.1～20 ℃ (generally, temperature can stop the preceding paragraph time in the initial stage that benzophenanthrene derivative molecular texture generates; The time of staying is 1min～1h).
Embodiment 1:HAT5 is the vertical plane orientation on slide
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned slide, used nitrogen or compressed air to dry up subsequently.
Step 2, fusion: the HAT5 powder is placed on the slide, and in the process of heating slide, the thawing of HAT5 powder is launched into film.
Step 3 with the slide with HAT5 film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 10 ℃/min, is warming up to 125 ℃ (clearing point temperature of HAT5 is 122 ℃), stops 30min.
Step 4, when with the speed of 0.5 ℃/min the HAT5 film being cooled to 120 ℃, the time of staying is 1h, the speed with 0.5 ℃/min is cooled to 30 ℃ subsequently, subsequently natural cooling.
By above-mentioned heat treatment, the HAT5 film mutually in the interval, obtains desirable vertical plane orientation in its liquid crystal column on single slide surface.
When the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Fig. 1 embodiment 1 on glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation HAT5 film, obtains good vertical plane and is orientated in its liquid crystalline phase interval by above-mentioned heat treatment just because of the central shaft of the column that forms on slide.
When the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Fig. 2 embodiment 1 on slide, the microscope picture under natural daylight.Compare with Fig. 1, can observe the pattern that obtains the texture that molecular aggregates forms in the HAT5 oriented film.
The vertical incidence of HAT5 oriented film on slide two dimension XRD ray diffraction pattern among Fig. 3 embodiment 1.From two-dimentional wide-angle x-ray diffraction pattern, can see six, have obvious symmetric speck, the angle between each bright spot is 60 °.Column that the HAT5 molecular stacks forms is described perpendicular to substrate, and with the form arrangement of six sides symmetry.
Embodiment 2:HAT5 is the vertical plane orientation on the ito glass substrate
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned the ito glass substrate, used nitrogen or compressed air to dry up subsequently.
Step 2 is dripped film: with the 10mg/mlHAT5 solution for preparing, directly drop on the orientation ito glass, directly be launched into film.
Step 3 with the ito glass with HAT5 film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 20 ℃/min, is warming up to 130 ℃ (clearing point temperature of HAT5 is 122 ℃), stops 10min.
Step 4, with 0.5 ℃/when min speed was cooled to 110 ℃ with the HAT5 film, the time of staying was 1h, the speed with 0.5 ℃/min is cooled to 30 ℃ subsequently, subsequently natural cooling.
When the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Fig. 4 embodiment 2 on the ito glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation HAT5 film obtains good vertical plane by above-mentioned heat treatment and is orientated just because of the central shaft of the column that forms on ito glass substrate.
When the HAT5 film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Fig. 5 embodiment 2 on the ito glass substrate, at the microscope picture of natural daylight.Compare with Fig. 4, can observe the pattern that obtains the texture that molecular aggregates forms in the HAT5 oriented film.
Embodiment 3:HAT5 is the vertical plane orientation on quartz substrate
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned quartz substrate, used nitrogen or compressed air to dry up subsequently.
Step 2, spin coating:, be spun on the quartz substrate with the speed of 1000rmp with the 10mg/ml HAT5 solution that configures.
Step 3 with the quartz substrate with HAT5 film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 20 ℃/min, is warming up to 135 ℃ (clearing point temperature of HAT5 is 122 ℃), stops 1min.
Step 4, with 0.5 ℃/when min speed was cooled to 115 ℃ with the HAT5 film, the time of staying was 1h, the speed with 0.5 ℃/min is cooled to 30 ℃ subsequently, subsequently natural cooling.
When the HAT5 film slowly is cooled to 70 ℃ with the speed of 0.5 ℃/min among Fig. 6 embodiment 3 on quartz substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation HAT5 sample can obtain good vertical plane by above-mentioned heat treatment and be orientated just because of the central shaft of the column that forms on quartz base plate.
When the HAT5 film slowly is cooled to 70 ℃ with the speed of 0.5 ℃/min among Fig. 7 embodiment 3 on quartz substrate, the microscope picture under natural daylight.Compare with Fig. 6, can observe the pattern that obtains the texture that molecular aggregates forms in the HAT5 oriented film.
Embodiment 4:TPE is the vertical plane orientation on slide
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned slide, used nitrogen or compressed air to dry up subsequently.
Step 2, spin coating:, be spun on the slide with the speed of 1000rmp with the 10mg/mlTPE solution that configures.
Step 3 with the slide with TPE film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 10 ℃/min, is warming up to 168 ℃ (clearing point temperature of TPE is 164 ℃), and the time of staying is 1h.
Step 4, when with the speed of 0.5 ℃/min the TPE film being cooled to 150 ℃, the time of staying is 1h.
Step 5 is cooled to 130 ℃ with the speed of 0.2 ℃/min, and the time of staying is 2h.
Step 6 is cooled to 30 ℃ with the speed of 0.5 ℃/min, subsequently natural cooling.
By above-mentioned heat treatment, the TPE film mutually in the interval, can obtain desirable vertical plane orientation in its liquid crystal column on single slide surface.Specifically, the orientation texture of TPE can be intact remains into room temperature.
When the TPE film slowly is cooled to 130 ℃ with the speed of 0.5 ℃/min among Fig. 8 embodiment 4 on slide, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film can obtain good vertical plane by above-mentioned heat treatment and be orientated just because of the central shaft of the column that forms on glass substrate.
When the TPE film slowly is cooled to 130 ℃ with the speed of 0.5 ℃/min among Fig. 9 embodiment 4 on slide, the microscope picture under natural daylight.Compare with Fig. 8, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film.
The two-dimentional XRD ray diffraction pattern of vertical incidence TPE oriented film on slide among Figure 10 embodiment 4.From two-dimentional wide-angle x-ray diffraction pattern, can see six, have obvious symmetric speck, the angle between each bright spot is 60 °.Column that the TPE molecular stacks forms is described perpendicular to substrate, and with the form arrangement of six sides symmetry.
When the TPE film slowly is cooled to 34 ℃ with the speed of 0.5 ℃/min among Figure 11 embodiment 4 on glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film can obtain good vertical plane by above-mentioned heat treatment and be orientated on glass substrate, and can remain to the temperature near room temperature just because of the central shaft of the column that forms.
When the TPE film slowly is cooled to 34 ℃ with the speed of 0.5 ℃/min among Figure 12 embodiment 4 on glass substrate, the microscope picture under natural daylight.Compare with Figure 11, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film near the temperature range of room temperature.
Embodiment 5:TPE is the vertical plane orientation on the ito glass substrate
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned the ito glass substrate, used nitrogen or compressed air to dry up subsequently.
Step 2 is dripped film: with the 10mg/ml TPE solution for preparing, directly drop on the orientation ito glass substrate, directly be launched into film.
Step 3 with the ito glass with TPE film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 10 ℃/min, is warming up to 170 ℃ (clearing point temperature of TPE is 164 ℃), stops 5min.
Step 4, when with the speed of 0.5 ℃/min the TPE film being cooled to 160 ℃, the time of staying is 2h.
Step 5 is cooled to 130 ℃ with the speed of 0.5 ℃/min, and the time of staying is 2h.
Step 6 is cooled to 30 ℃ with the speed of 10 ℃/min.
When the TPE film slowly is cooled to 110 ℃ with the speed of 0.5 ℃/min among Figure 13 embodiment 5 on the ito glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film obtains good vertical plane by above-mentioned heat treatment and is orientated just because of the central shaft of the column that forms on ito glass substrate.
Microscope picture when the TPE film slowly is cooled to 110 ℃ with the speed of 0.5 ℃/min among Figure 14 embodiment 5 on the ito glass substrate under natural daylight.Compare with Figure 13, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film.
When the TPE film slowly is cooled to 35 ℃ with the speed of 10 ℃/min among Figure 15 embodiment 5 on the ito glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE sample obtains good vertical plane by above-mentioned heat treatment and is orientated on ito glass substrate, and can remain to the temperature near room temperature just because of the central shaft of the column that forms.
When the TPE film slowly is cooled to 35 ℃ with the speed of 10 ℃/min among Figure 16 embodiment 5 on the ito glass substrate, the microscope picture under natural daylight.Compare with Figure 15, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film near the temperature range of room temperature.
Embodiment 6:TPE is the vertical plane orientation on quartz substrate
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned quartz substrate, used nitrogen or compressed air to dry up subsequently.
Step 2, fusion: as on the quartz substrate, in the process of heating quartz substrate, the sample thawing is launched into film with the TPE powder.
Step 3 with the quartz substrate with TPE film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 10 ℃/min, is warming up to 175 ℃ (clearing point temperature of TPE is 164 ℃), stops 2min.
Step 4, when with the speed of 0.5 ℃/min the TPE film being cooled to 150 ℃, the time of staying is 1h, the speed with 0.5 ℃/min is cooled to 30 ℃ subsequently.
When the TPE film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Figure 17 embodiment 6 on quartz substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film obtains good vertical plane by above-mentioned heat treatment and is orientated just because of the central shaft of the column that forms on quartz base plate.
When the TPE film slowly is cooled to 80 ℃ with the speed of 0.5 ℃/min among Figure 18 embodiment 6 on quartz substrate, the microscope picture under natural daylight.Compare with Figure 17, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film.
When the TPE film slowly is cooled to 30 ℃ with the speed of 0.5 ℃/min among Figure 19 embodiment 6 on quartz substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film obtains good vertical plane by above-mentioned heat treatment and is orientated on quartz base plate, and can remain to the temperature near room temperature just because of the central shaft of the column that forms.
When the TPE film slowly is cooled to 30 ℃ with the speed of 0.5 ℃/min among Figure 20 embodiment 6 on quartz substrate, the microscope picture under natural daylight.Compare with Figure 19, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film near the temperature range of room temperature.
Embodiment 7:TPE is the vertical plane orientation on glass substrate
Step 1 was used acetone, deionized water, acetone ultrasonic 10～20 minutes successively, cleaned glass substrate, used nitrogen or compressed air to dry up subsequently.
Step 2, as on the glass substrate, in the process of heating glass substrate, the thawing of TPE powder is launched into film with the TPE powder.
Step 3 with the glass substrate with TPE film that step 2 is made, places on the hot platform of temperature control, and heating rate is set to 20 ℃/min, is warming up to 170 ℃ (clearing point temperature of TPE is 164 ℃), stops 5min.
Step 4, when with the speed of 100 ℃/min the TPE film being cooled to 163 ℃, the time of staying is 1h, and the speed with 0.5 ℃/min is cooled to 162 ℃ subsequently, and the time of staying is 1h.At last, the speed with 5 ℃/min is cooled to 40 ℃.
By above-mentioned heat treatment, the TPE sample thin film mutually in the interval, can obtain desirable vertical plane orientation in its liquid crystal column on single glass substrate surface.Specifically, the orientation texture of TPE can be intact remains into room temperature.
When the TPE film slowly is cooled to 40 ℃ with the speed of 5 ℃/min among Figure 21 embodiment 7 on glass substrate, the texture that under the cross-polarized light condition, forms.Observed in the drawings details in a play not acted out on stage, but told through dialogues causes that perpendicular to substrate this explanation TPE film obtains good vertical plane by above-mentioned heat treatment and is orientated on glass substrate, and can remain to the temperature near room temperature just because of the central shaft of the column that forms.
When the TPE film slowly is cooled to 40 ℃ with the speed of 5 ℃/min among Figure 22 embodiment 7 on glass substrate, the microscope picture under natural daylight.Compare with Figure 21, can observe the pattern that obtains the texture that molecular aggregates forms in the TPE oriented film near the temperature range of room temperature.
The hot platform model of the employed temperature control of above-mentioned all embodiment is Linkam THMSE 600 types; Method for alignment of the present invention is applicable to the film of the thickness of general use; The equal 6 penta alkoxyl benzophenanthrenes (HAT5) of material that use and the molecular structural formula of 4 penta alkoxyl diethyl-ester group benzophenanthrenes (TPE):
The oriented film of all embodiment preparations after carrying out set heat treatment, naturally cools to room temperature preservation among the present invention.
Other six alkoxyls benzo phenanthrene derivatives mix the film that side chain benzophenanthrene derivative prepares on substrate with alkoxy, handle all to obtain desirable vertical plane orientation through said method.
The sign of middle vertical plane orientation texture of the present invention relies on petrographic microscope (the petrographic microscope model is LeicaDMRX) and in conjunction with vertical incidence two-dimensional x-ray diffraction (the German Bruker D8 Discover of company face is visited X-ray diffractometer).
Petrographic microscope characterizes principle: when polarised light passed through the liquid of isotropic, its polarization state did not change; Therefore when observation of liquid state sample under the condition of cross cross-polarized light, be generally details in a play not acted out on stage, but told through dialogues in the visual field.When observing, the benzophenanthrene derivative molecular is in its liquid crystalline phase among the present invention, thereby if can to observe details in a play not acted out on stage, but told through dialogues this moment in the visual field be not because the isotropic of observation sample causes.When polarised light along the optical axis of sample during by sample, its polarization state does not change.When observing emergent light with the analyzer of incident light polarization direction quadrature, also can present details in a play not acted out on stage, but told through dialogues in the visual field, be referred to as false isotropism usually.By heat treated means, the benzophenanthrene derivative molecular has obtained good assembling and has arranged; The benzophenanthrene derivative molecular is stacked into so-called column earlier mutually, and these columns are arranged in ordered structure more in every way.Suppose that the direction of column central shaft can regard its optical axis direction as, when column is arranged perpendicular to substrate, and the used polarization light of observation sample is also perpendicular to substrate incident, can think that polarised light propagates along the optical axis of sample this moment.Therefore incident polarized light does not change its polarization state in the process of propagating; When using analyzer with incident light polarization direction cross quadrature to detect emergent light, in the visual field, can only observe details in a play not acted out on stage, but told through dialogues, this is indicating that sample obtains good vertical plane orientation by heat treatment on orientation substrate.
Vertical incidence two-dimensional x-ray diffraction characterizes principle: by two-dimentional wide-angle x-ray diffraction experiment (2DWAXS), further identify the orientation texture of molecule in the benzophenanthrene derivative molecular film among the present invention.With the direction of principal axis incident of the X ray light beam surveyed along column, can check film inside column whether be the vertical plane orientation, and whether orientation texture has six side's symmetry.By polarized light microscope observing, can on glass surface, obtain desirable vertical plane orientation at the mutually interval benzophenanthrene derivative of column, the direction of principal axis of column is just in time perpendicular to substrate during orientation; Therefore when surveying with the X ray light beam perpendicular to the glass substrate incident that is coated with the benzophenanthrene derivative.If from two-dimentional wide-angle x-ray diffraction pattern, can see six, have obvious symmetric speck, angle between each bright spot is 60 °, column that the benzophenanthrene derivative molecular piles up formation just can be described perpendicular to substrate, and arranges with the form of six sides symmetry.
Claims (9)
1. the control method of a benzophenanthrene derivative molecular orientation is characterized in that, the step of this control method:
Step 1 places the orientation substrate that is coated with the benzophenanthrene derivative film on the hot platform of temperature control, when being warming up to the scope of above 0.1～20 ℃ of benzophenanthrene molecule clearing point temperature, stops 1min～1h.
Step 2 with the cooling of the speed of 0.1～130 ℃/min, when being cooled to following 0.1～20 ℃ of benzophenanthrene molecule clearing point temperature, stops 1min～100h, continues cooling subsequently:
Temperature-fall period subsequently described in the step 3, step 2 is, below clearing point temperature 20 ℃ in the interval of crystallization temperature, select 1～5 temperature value from high to low successively, and time of staying 1min～10h be set respectively, whole temperature-fall period is the staged cooling.
2. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 1 is characterized in that, employed benzophenanthrene derivative is that six alkoxyl benzo phenanthrene derivatives mix side chain benzophenanthrene derivative with alkoxy.
3. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 2 is characterized in that, employed six alkoxyl benzo phenanthrene derivatives are to have six six alkoxyl benzo phenanthrene derivatives with equal length alkoxyl side chain.
4. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 2, it is characterized in that, employed six alkoxyl benzo phenanthrene derivatives be have different length the alkoxyl side chain, molecular structure is six alkoxyl benzo phenanthrene derivatives of unsymmetric structure.
5. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 2, it is characterized in that, it is the alkoxyl side chain with many equal length that employed alkoxy is mixed side chain benzophenanthrene derivative, and perhaps the alkoxy of the alkoxyl side chain of many different lengths is mixed side chain benzophenanthrene derivative.
6. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 2, it is characterized in that, it is the lateral chain of ester group with many equal length that employed alkoxy is mixed side chain benzophenanthrene derivative, and perhaps the alkoxy of the lateral chain of ester group of many different lengths is mixed side chain benzophenanthrene derivative.
7. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 1 is characterized in that, the benzophenanthrene derivative molecular has the benzophenanthrene derivative that benzophenanthrene structure kernel, periphery have 2～6 side chains in the middle of being.
8. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 1 is characterized in that, the orientation substrate of use is: glass, slide, ito glass, quartz, quartz glass, silicon chip, metallic film or organic film coated substrates.
9. the control method of a kind of benzophenanthrene derivative molecular orientation according to claim 1 is characterized in that, benzophenanthrene derivative oriented layer prepares on substrate surface and keeps upper surface is Free Surface, or preparation is between two substrates.
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| CNA2008100561960A CN101217183A (en) | 2008-01-15 | 2008-01-15 | A control method on triphenylene molecule derivatives molecular orientation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650768A (en) * | 2012-05-21 | 2012-08-29 | 北京科技大学 | Orientation method for perylene discoid liquid crystal compound |
| CN114141962A (en) * | 2021-11-29 | 2022-03-04 | 北京京东方技术开发有限公司 | Film layer preparation method, light-emitting substrate and light-emitting device |
| CN114141962B (en) * | 2021-11-29 | 2024-04-26 | 北京京东方技术开发有限公司 | Film preparation method, light-emitting substrate and light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102757349B (en) * | 2012-06-21 | 2015-03-04 | 江苏和成显示科技股份有限公司 | Benzophenanthrene derivative and application thereof |
| CN105609641B (en) * | 2015-12-26 | 2021-12-17 | 中国乐凯集团有限公司 | Perovskite type solar cell and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650768A (en) * | 2012-05-21 | 2012-08-29 | 北京科技大学 | Orientation method for perylene discoid liquid crystal compound |
| CN114141962A (en) * | 2021-11-29 | 2022-03-04 | 北京京东方技术开发有限公司 | Film layer preparation method, light-emitting substrate and light-emitting device |
| CN114141962B (en) * | 2021-11-29 | 2024-04-26 | 北京京东方技术开发有限公司 | Film preparation method, light-emitting substrate and light-emitting device |
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