CN106749421B - The preparation and its application of highly sensitive singlet oxygen phosphorescence probe - Google Patents

The preparation and its application of highly sensitive singlet oxygen phosphorescence probe Download PDF

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CN106749421B
CN106749421B CN201611039001.2A CN201611039001A CN106749421B CN 106749421 B CN106749421 B CN 106749421B CN 201611039001 A CN201611039001 A CN 201611039001A CN 106749421 B CN106749421 B CN 106749421B
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王克志
尹红菊
刘艳菊
高洁
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Beijing Normal University
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Abstract

The invention discloses the applications in terms of the preparation method of binuclear ruthenium and its singlet oxygen sensor.Using the logarithm of the concentration of singlet oxygen as abscissa, the logarithm of luminous intensity is that ordinate draws out standard working curve, for measuring singlet oxygen concentration in neutral and alkaline aqueous medium.This method has the advantages that excited by visible light, high sensitivity, highly selective and easy-operating.

Description

The preparation and its application of highly sensitive singlet oxygen phosphorescence probe
Technical field
The present invention relates to singlet oxygen in solution (1O2) measurement, it is specifically a kind of to contain anthracycline derivatives ligand A kind of preparation and its application of double-core ruthenium metal complex singlet oxygen phosphorescence probe.
Background technique
Singlet oxygen is a kind of unstable existence form that oxygen molecule is in high energy excitation state, and singlet oxygen is as organic A kind of preciousness reagent in chemistry, in many photochemistry and optical-biological reaction, as light degradation, the light conversion of pollutant, chemiluminescence, During organism deterioration by oxidation, even photocarcinogenesis etc., highly important role all play.In organic synthesis, Singlet oxygen makes the introducing oxygen in the single-minded organic compound of High level of stereoselectivity become extremely to be easy.In biosystem, single line State oxygen has great influence to life system, and the physiology oxidation of singlet is increasingly interested by researchers.It is single Line state oxygen plays an important role in cellular damage and apoptosis, it may cause the strong oxidizing property damage to body, to draw The generation for playing body lipid peroxidation, leads to the damage of biomembrane, parteriole, DNA, protein and central nervous system, Accelerate the aging and death of body, therefore be considered as toxicity species important in vivo, causes disease related with oxidative damage, Such as cataract, pulmonary edema, diabetes, muscular atrophy, nutritional deficiency, mental disease and tumour germinating [(a) K.Briviba, L.O.Klotz,H.Sies,Toxic and signaling effects of photochemically or chemically generated singlet oxygen in biological systems,Biol.Chem.,1997,378,1259.b) J.R.Wagner,P.A.Motchnik,R.Stocker,H.Sies,B.N.Ames,The oxidation of blood plasma and low density lipoprotein components by chemically generated singlet oxygen,J.Biol.Chem.,1993,268,18502.].Singlet oxygen is in the regulation such as the hyperplasia of cell, differentiation, apoptosis It plays an important role, it is considered to be a kind of new second messenger [(a) R.W.Redmond, I.E.Kochevar, Spatially resolved cellular responses to singlet oxygen,Photochem.Photobiol.,2006,82 (5),1178-1186.(b)N.L.Oleinick,R.L.Morris,I.Belichenko,The role of apoptosis in response to photodynamic therapy:what,where,why,and how, Photochem.Photobiol.Sci.,2002,1,1–21.].On the contrary, people also can use the strong oxidizing property of singlet oxygen Matter goes to kill malignant cell or tissue, achievees the purpose that cure cancer.Experiment discovery, when malignant cell obtains and ties When the ability of conjunction singlet oxygen sensitizers drug is noticeably greater than normal tissue, after illumination, the singlet of drug molecule generation Oxygen can selectively kill tumour cell.Medically with the singlet oxygen that the photosensitive method of methylene blue generates come to Plasma disinfection and The photodynamic diagnosis of tumour, before this photodynamic therapy technology has a wide range of applications in the diagnosing and treating of tumour Scape.Singlet oxygen and human health and disease are closely related, are the hot spots of current life science and chemical science crossing research.
Since singlet oxygen has such consequence during photochemistry and photo-biological,1O2Detection receives much attention, Especially in biosystem1O2Detection increasingly cause the concern of researcher.Research and develop list highly sensitive and that selectivity is good The small-molecule fluorescent probe of line state oxygen is of great significance, and it is big that it can provide biology in singlet oxygen targeting cell system in real time The important space distributed intelligence of molecule can accurately detect the content of internal singlet oxygen, for the pre- of certain diseases in due course Anti-, diagnosis and the research of pathology have highly important directive significance [K.Tanaka, T.Miura, N.Umezawa, Y.Urano,K.Kikuchi,T.Higuchi,T.Nagano,Rational design of fluorescein-based fluorescence probes,Mechanism-based design of a maximum fluorescence probe for singlet oxygen,J.Am.Chem.Soc.,2001,123(11),2530.].It is reported at present to be used to detect list The method of line state oxygen is mainly include the following types: (1) phosphorimetry, detects the standard method of singlet oxygen, utilize singlet oxygen The near-infrared phosphorescence generated at 1268nm itself is quenched to be detected, for this method to organism without infringement, selectivity is high, but sensitive Spend that low, detecting signal is weak, is not used to very low concentrations1O2Detection [K.Andersen, Z.Cao, P.R.Ogilby, L.Poulsen,I.Zebger,J.Phys.Chem.A.2002,106,8488.].(2) Chemical Trapping absorption photometry, using 9, 10- diphenylanthrancene (DPA) with1O2Characteristic reaction generate the variation that stable endoperoxides object causes DPA absorption spectrum, lead to The variation of detection DPA absorption spectrum is crossed to measure1O2, this method is selectively good, though sensitivity is more much higher than the detection of 1268nm phosphorescence [M.J.Steinbeck,A.U.Khan,M.J.Karnovsky,Extracellular production of singlet oxygen by stimulated macrophages quantified using 9,10-diphenylanthracene and Perylene in a polystyrene film, J.Biol.Chem., 1993,268 (21), 15649.], but this method is to be based on Absorption spectrum, so sensitivity is still lower.(3) organic fluorescence sonde method is the organic glimmering of detection means using fluorescence signal Light probe method includes two classes: (a) being utilized1O2It is reacted with the fluoresceins probe molecule specificity with anthracene nucleus, so that probe is by original The non-fluorescent molecule come becomes fluorescent both molecule, for1O2Detection (N.Umezawa, K.Tanaka, Y.Urano, K.Kikuchi,T.Higuchi,T.Nagano,Angew.Chem.Int.Ed.Engl.1999,38,2899;K.Tanaka, T.Miura,N.Umezawa,Y.Urano,K.Kikuchi,T.Higuchi,T.Nagano,J.Am.Chem.Soc.2001, 123,2530.).This method detection time is short, high sensitivity, but is not suitable for low ph environment and real-time detection.(b) it utilizes Energy transmission between fluorescent probe molecule, excitation probe molecule issue strong delayed fluorescence, and then for detecting1O2 (A.A.Krasnovskii,C.Schweitzer,H.Leismann,C.Tanielian,E.A.Luk’yanets,Quantum Electron.,2000,30,445;A.A.Krasnovskii,M.E.Bashtanov,N.N.Drozdova, O.A.Yuzhakova,E.A.Luk'yanets,Quantum Electron.,2002,32,83.).This kind of probe mainly has phthalein Cyanine dyes and seaweed oxazine derivatives etc. can issue fluorescence for detecting after the energy for receiving singlet oxygen near 700nm. (4) chemiluminescence probe method, this be it is a kind of based on Photo-induced electron transfer mechanism singlet oxygen fluorescence probe (X.H.Li, G.X.Zhang, H.M.Ma, D.Q.Zhang, J.Li, D.B.Zhu, J.Am.Chem.Soc.2004,126,11543.), this kind of spy Needle detects speed fastly and has very high sensitivity and selectivity, but poorly water-soluble well, is unfavorable for biosystem1O2Survey It is fixed.(5) rare-earth fluorescent probe, long-life phosphors feature of the Yuan Jingli group based on rare-earth fluorescent complex, is prepared for a series of Rare-earth fluorescent probe has obtained preferable effect (Yuan Jingli, Song using time-resolved fluorescence detection technique measurement singlet oxygen Wave, Wang Guilan, Tan Mingqian, a kind of singlet oxygen fluorescence probe and its application based on europium complex, Chinese invention patent, application Numbers 200510130851.9;Yuan Jingli, Song Bo, Wang Guilan, a kind of singlet oxygen europium coordination compound fluorescent probe and its application, China Patent of invention, application number: 200510045768.1;Yuan Jingli, Song Bo, Wang Guilan, a kind of terbium coordination compound singlet oxygen fluorescence spy Needle and its application, Chinese invention patent, application number 200510045767.7), the excitation wavelength of this kind of complex is in ultra-violet (UV) band, Measurement1O2When, biosystem is had damage (B.Song.G.L.Wang.M.Q.Tan.J.L.Yuan.New J.Chem.2005, 29,1431.).Be recently reported rhenium (I) complex singlet oxygen phosphorescence probe (Y.J.Liu, K.Z.Wang, Eur.J.Inorg.Chem., 2008,5214.), and applied for that series of patents discloses a series of single line of rutheniums or complex of iridium State oxygen phosphorescence probe (high water-solubility ruthenium metal complex singlet oxygen fluorescent probe and its preparation and application, the patent No.: ZL 2011 1 0204287.6;Application of the ruthenium complex of Hdppz ligand as singlet oxygen fluorescence probe ", the patent No.: ZL2011101593710;The preparation and its application of ruthenium and iridium metal complex singlet oxygen fluorescent probe, the patent No.: ZL 2008 1 0240591.4.), also have recently other study groups report ruthenium complex singlet oxygen phosphorescence probe (Z.Q.Ye, B.Song, Y.J.Yin,R.Zhang,J.L.Yuan,Development of singlet oxygen-responsive phosphorescent ruthenium(II)complexes,Dalton Trans.2013,4214380.).But these probes Sensitivity still need to improve.
Summary of the invention
The purpose of the present invention is develop excited by visible light, high sensitivity it is novel1O2Fluorescence probe.
Technical scheme is as follows:
A kind of ruthenium binuclear complex containing anthracycline derivatives ligand, structural formula are [Ru (L2)2(H2L1)Ru(L2)2] Xk, wherein X be counter anion, X be negative monovalent ion when, k=4;X be negative divalent ion when, k=2.L=bpy or phen etc. Azepine bidentate ligand;Bpy, phen and H2L1Its structural formula is shown below respectively:
Above-mentioned counter anion is mostly the ion of negative one valence, such as Cl-、ClO4 -、PF6 -、NO3 -、CF3SO3 -、BF4 -
The specific example of complex of the invention is for example:
Complex [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4Structure be shown below:
Above-mentioned complex [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4It can be prepared by the following method:
9,10- anthracene dialdehyde (Ryu, the D. first synthesized by literature method;Park,E.;Kim,D.S.;Yan,S.H.;Lee, J.Y.;Chang,B.Y.;Ahn,K.H.,J.Am.Chem.Soc.,2008,130,2394;Kim,H.S.;Moon,H.S.; Jang,D.O.,Superamol.Chem.,2006,18,97;Klanderman,B.H.,J.Org.Chem.,1966,31, 2618.) and 1,10- phenanthroline -5,6- diketone is condensed synthesis critical ligand H in the presence of ammonium acetate/acetic acid2L1;Then H2L1 With Ru (bpy)2Cl22H2After O reacts in ethylene glycol, through Al2O3Column chromatography purification.
It is of the invention using transition metal ruthenium or iridium as center ion, be that the complex of ligand has single line using anthracycline derivatives The performance of state oxygen fluorescence probe, suitable for neutral and alkaline system1O2It is qualitative and/or quantitative determination.
The application process of the singlet oxygen fluorescence probe of the complex are as follows: in neutral or alkaline solution, using described Complex is as in fluorescence probe capture system1O2And the endoperoxides object of the complex, body are generated with singlet oxygen effect The fluorescence intensity of system significantly increases, and can detecte in system by the fluorimetry of excited by visible light1O2.It comprises the concrete steps that:
1. complex of the invention is added in the known neutrality or alkaline system that effectively can generate singlet oxygen, Under a series of singlet oxygen concentration conditions, the fluorescence intensity and absorbance of system are measured by excited by visible light, are obtained opposite The fluorescence quantum efficiency answered obtains standard curve of the fluorescence quantum efficiency relative to singlet oxygen concentration;
2. containing the complex neutrality or alkaline buffer solution in a certain amount of solution to be measured is added, pass through visible light The fluorescence intensity and absorbance for exciting measurement system, are calculated its fluorescence quantum efficiency;
3. the logarithm of the fluorescence intensity measured using step 2 does abscissa as ordinate, with the log concentration of singlet oxygen Mapping, linear segment are the standard curve for measuring singlet oxygen concentration.
Singlet oxygen phosphorescence probe excited by visible light disclosed by the invention, and peroxide in it is generated after reacting with singlet oxygen Compound fluorescence intensity enhances the big singlet oxygen fluorescence probe of amplitude.Probe of the invention has the advantages that
1. suitable for neutral and alkaline system1O2Measurement.
2. singlet oxygen detection sensitivity with higher, lowest detection 3.12-2.7nM.
3. having preferable selectivity, other active oxygen species (H2O2, OH, ONOO-) system fluorescence signal is caused to enhance Amplitude very little.
Detailed description of the invention
Fig. 1 is illustrated neutral with singlet oxygen in alkaline system to complex [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4 The influence of (5 μM) absorption spectrum, in which: (a) is the change of the absorption spectrum in the 50mM phosphate buffer solution of pH=7.0 Change;(b) be absorption spectrum in the 0.1M carbonate buffer solution of pH=9.95 variation.The illustration of Fig. 1 (a) and (b) point Complex [the Ru (bpy) in neutral and alkaline system is not illustrated2(H2L1)Ru(bpy)2]Cl4The fluorescence intensity of (5 μM) with Relationship in system between singlet oxygen concentration.
Fig. 2 is illustrated neutral with singlet oxygen in alkaline system to complex [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4 The influence of (5 μM) luminescent spectrum, in which: (a) is the change of the fluorescence spectrum in the 50mM phosphate buffer solution of pH=7.0 Change;(b) be fluorescence spectrum in the 0.1M carbonate buffer solution of pH=9.95 variation.The illustration of Fig. 2 (a) and (b) point Complex [the Ru (bpy) in neutral and alkaline system is not illustrated2(H2L1)Ru(bpy)2]Cl4The fluorescence intensity of (5 μM) with Relationship in system between singlet oxygen concentration.
Fig. 3 illustrates the complex [Ru (bpy) in neutral and alkaline system2(H2L1)Ru(bpy)2]Cl4(5 μM) it is glimmering Relationship between photo-quantum efficiency and singlet oxygen concentration, in which: (a) is in the 50mM phosphate buffer solution of pH=7.0; It (b) is in the 0.1M carbonate buffer solution of pH=9.95.
Fig. 4 illustrates complex [Ru (bpy) in neutral and alkaline system2(H2L1)Ru(bpy)2]Cl4It is (1.67 μM) and living The effect of property oxygen species ([ROS]=0.53 μM), in which: (a) is in the 50mM phosphate buffer solution of pH=7.0;(b) it is In the 0.1M carbonate buffer solution of pH=9.95.
Specific embodiment
Below by embodiment, the present invention is further described.
Embodiment one, ligand H2L1Synthesis:
78mg (0.33mmol) 9,10- anthracene dialdehyde and 140mg (0.66mmol) 1,10- o-phenanthroline -5,6- diketone and 500mg (0.33mmol) ammonium acetate is dissolved in 20ml acetic acid, N2The lower 6h that flows back of protection.Solution is added in ice water after reaction, is put A night is set, a large amount of yellow mercury oxides occurs.It filters, it is dry.Methanol is washed, dry.Gained crude product solubility is excessively poor, is not easy to mention It is pure.
Embodiment two, [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4Synthesis:
H2L1(0.0307g,0.05mmol)、Ru(bpy)2Cl2·2H2O (0.0520g, 0.1mmol) is in 10ml ethylene glycol In, lower 140 DEG C of nitrogen protection are stirred to react 12 hours, and reaction solution becomes peony by initial purple, cooling.By ethylene glycol It screws out, product solid CH2Cl2/CH3OH (volume ratio 20/1) dissolution, with neutral Al2O3(200-300 mesh) column chromatography for separation, is washed Proposing agent is 20~50/1CH of volume ratio2Cl2/CH3OH, collects main red zone, and revolving removes solvent.By obtained solid second Nitrile/ether diffusion recrystallization, obtains red solid 0.045g, yield 56.9%.Matrix Assisted Laser Desorption ionizes flight time matter Spectrum: m/z=360.9 ([M-4Cl?]+), M=C80H54N16Cl4Ru2, calculated value: 360.0 ([M-4Cl?]+).Proton magnetic is total Vibration spectrum (δH, ppm, 400MHz, DMSO-d6): 9.20 (d, J=7.36Hz, 2H), 9.03 (d, J=6.88Hz, 2H), 8.91 (d, J1=8.34Hz, J2=11.98Hz, 8H), 8.25 (t, J=7.96Hz, 4H), 8.16 (m, 8H), 7.97 (s, 8H), 7.91 (d, J =5.40Hz, 4H), 7.72 (d, J=5.48Hz, 4H), 7.64 (m, 8H), 7.43 (s, 4H).Infrared spectroscopy (KBr, cm-1): 3422br, 1596w, 1461w, 1443w, 1384s, 1353s, 767m, 726w.Elemental analysis [C80H54N16Cl4Ru2· 4CH3CN·18.5H2O (F.W.=2079.46)] calculated value: C, 50.79;H, 4.99;N, 13.46%;Measured value: C, 50.39; H, 4.23;N, 14.05%.
Three singlet oxygen of embodiment senses property and measurement
With [Ru (bpy)2(H2L1)Ru(bpy)2]Cl4For, introduce complex of the present invention as fluorescence probe neutrality with The method and detection performance of singlet oxygen are detected in alkaline solution.
In neutral system1O2Measurement: first in the phosphate buffer solution of the pH=7.0 containing 10mM NaOCl plus Enter complex, H then is added in the system2O2, H2O2/ NaOCl system singlet oxygen yield in neutral solution is almost 100% (A.M.Held, D.J.Halko, J.K.Hurst, J.Am.Chem.Soc.1978,100,5732-5740.).With H2O2 Addition, constantly generate in system1O2, generated1O2Acted on complex, the anthracene nucleus in complex 350nm-400nm it Between absorption constantly reduce, it was demonstrated that anthracene nucleus be with1O2The active group of reaction, while system fluorescence intensity gradually increases.
In alkaline system1O2Measurement: contain 10mM Na2MoO4PH=9-11 carbonate buffer solution in be added Then H is added in complex in system2O2, H2O2/Na2MoO4System can effectively generate singlet oxygen in alkaline solution (K.Tanaka,T.Miura,N.Umezawa,Y.Urano,K.Kikuchi,T.Higuchi,T.Nagano, J.Am.Chem.Soc.,2001,123,2530-2536;M.Q.Tan,B.Song,G.L.Wang,J.L.Yuan,Free Radic.Biol.Med.,2006,40,1644–1653.).With H2O2Addition, system constantly generates1O2, generated1O2 Acted on complex, absorption of the anthracene nucleus in complex between 350nm-400nm constantly reduces, it was demonstrated that anthracene nucleus be with1O2Reaction Active group, while system fluorescence intensity gradually increases.
Complex has preferable detection performance to singlet oxygen in neutral and alkaline solution, referring to FIG. 1 to FIG. 2, in Singlet oxygen under the conditions of property is by H2O2/ NaClO system is generated in the 50mM phosphate buffer solution of pH=7.0;Alkaline ring Singlet oxygen can be by H in border2O2/Na2MoO4Carbonate buffer solution of the system in the 0.1M of pH=9.95 generates.Instrument is used in measurement Device is GBC Cintra 10e ultraviolet-visible spectrophotometer and Cary Eclipse sepectrophotofluorometer.In neutral (alkali Property) H is added in buffer solution2O2System can generate1O2, with1O2With the effect of complex, anthracene nucleus part is in 350nm- Absorption between 400nm constantly reduces, as shown in Figure 1, it was demonstrated that anthracene nucleus be with1O2The active group of reaction.H be not added2O2When System almost without fluorescent emission, with1O2The increase of concentration ties up to the fluorescent emission at 610nm in 464nm light excitation lower body It gradually increases, (arrow direction is in Fig. 2 as shown in Figure 21O2The increased direction of concentration), have in neutral and alkalinity solution Singlet oxygen and without fluorescence intensity ratio in the presence of singlet oxygen respectively up to 5.4 and 7.6, quantum efficiency increase respectively reaches 7.6 Hes 8.8.The fluorescence enhancement of system be due to complex with1O2Effect generates its endoperoxides object to influence the emissivity of fluorophor Matter changes its luminescent properties to issue stronger fluorescence.The fluorescent emission at 610nm of system under the excitation of 464nm light Intensity with1O2Relationship between concentration as shown in figure 3, the neutral logarithm with the luminous intensity in alkaline buffer to singlet Oxygen concentration logarithm mapping results are shown in illustration, and the linear segment simulated in illustration obtains equation: lgI=3.56+ respectively 0.328lg[1O2] (n=15, r=0.986) and lgI=3.82+0.403lg [1O2] (n=15, r=0.993).By illustration In straight line portion as standard curve, any unknown system can be measured in neutral and alkaline conditions using complex as probe In singlet oxygen concentration.
In the effect experiment of complex and active oxygen species, complex and H2O2, OH, ONOO-The effect of isoreactivity oxygen species When system fluorescence intensity change very little, and complex with1O2The fluorescence of system greatly enhances after effect, as shown in figure 4, this shows Complex pair1O2With good selectivity.It is right in neutral and alkaline conditions1O2Detection minimum concentration according to background standard It is respectively 7.6nM and 5.2nM that the three times of deviation, which calculate, shows the complex pair1O2With very high sensitivity.

Claims (1)

1. a kind of binuclear ruthenium is used to prepare singlet oxygen phosphorescence probe, the binuclear ruthenium by cation and yin from Sub- Cl-Composition, which is characterized in that the cation is [(bpy)2Ru(H2L1)Ru(bpy)2]4+, structural formula is as shown below:
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CN109796503B (en) * 2018-10-26 2021-04-20 云南大学 Preparation method of dinuclear metallocene ruthenium complex and application of dinuclear metallocene ruthenium complex in tumor resistance
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Title
Selective cleavage of DNA at guanosine bases which locate in DNA non-duplex portions within duplexes by ruthenium(II) complexes;Lin Liu等,;《Inorganica Chimica Acta》;20120910;第385-390页,尤其是第386页、Supporting information
钌(II)多吡啶配合物与DNA相互作用的光切割与荧光性质研究;王海滔等,;《化学学报》;20101231;第1507-1512页

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