9-乙基-3-咔唑亚甲基-咔唑腙的合成

乙基咔唑亚甲基;有机光导体;9-乙基-3-咔唑亚甲基-咔唑腙的合成     

一种咔唑类衍生物的合成及其探针性能研究

用两步简便方法合成了基于咔唑基的荧光探针2,6-二(9-乙基咔唑-3氨甲基)-4-叔丁基苯酚,并对其光谱性能和离子选择性进行了研究.结果表明:在pH=7.4的体系中,该化合物对铜离子具有较强的选择性,铜离子的出现使得该探针在438nm处的荧光猝灭,且猝灭程度和铜离子浓度之间呈现良好的线性关系.     

非平面分子内共轭电荷转移化合物的发光行为

合成了两种分子内共轭的电荷转移化合物:2,3二氰基-5,7-二[2-[(4-二甲氨基)-苯基]乙烯基]-6H-1,4-二氮杂卓(1)及2,3-二氰基-5-苯基-7-[2-[(4-二甲氨基)-苯基]乙烯基]-6H-1,4-二氮杂卓(2). 用UV-Vis吸收光谱和荧光光谱法对它们在不同极性溶剂中的光致变色行为进行了研究.结果表明，化合物的荧光最大发射波长与溶剂的极化参数ET(30)值可在一定范围内构成线性关系，而单臂共轭的化合物2比双臂共轭的化合物1有着更大的Stoke’s位移和基态/激发态偶极矩差.对得到的结果进行了初步的讨论.     

一种D-π-A型咔唑类衍生物的合成

从咔唑,N,N-二甲基甲酰氨,溴己烷和丙二腈为原料,高效合成了双氰基功能性化合物--3-(2,2'-二氰基乙烯基)-N-己基咔唑(4),其结构经UV-Vis,荧光光谱,1H NMR,IR,MS及元素分析表征.考察了4的光学性质.     

含咔唑衍生物的聚硅氧烷发光材料的合成及其性能

设计并合成了含咔唑衍生物的聚硅氧烷发光材料。通过核磁共振、元素分析、紫外-可见吸收光谱、荧光光谱、热失重分析、循环伏安法对其结构和性能进行了表征。结果表明:该化合物具有良好的荧光性能和热稳定性,其发射波长为408 nm,分解温度在242℃,最高占据分子轨道能级和分子最低空轨道能级分别为4.70 eV和1.16 eV。     

咔唑及其衍生物合成方法研究进展

咔唑及其衍生物是一类重要的含氮芳杂环化合物,具有许多独特的理化性质及生物活性,分析、归纳、总结了近5年来发表的文献,选取具有代表性的实例,并按照中间体的不同将合成方法分为四类,分别讨论了咔唑及其衍生物合成方法的进展情况,对咔唑及其衍生物成环的新方法给予重点关注.     

分子内电荷转移化合物—查耳酮衍生物光谱和光物理行为研究

本工作合成了几种具有强电子给体和不同拉电子能力基团的查耳酮衍生物;对这些化合物的光谱和光物理行为进行了研究,发现该类化合物的发光行为不仅依赖于化合物本身的结构,而且还强烈地依赖于溶剂介质的极性、温度等外部条件,对所得结果进行了扼要的讨论。     

氧鎓盐分子在受限制体系中的电荷转移和发光行为

2,4,6-三芳基氧盐是一类类似于三苯甲烷染料的化合物^[1].其结构中存在两种跃迁矩,分别对应于分子的X-轴方向(2,6-位取代基)和Y-轴方向(4-位取代基).因此,2,4,6-三芳基氧盐的吸收光谱中存在着两个较具特征的吸收峰^[2].     

两种偶氮苯冠醚的合成及其光致变色机理

报道了4-氮杂15-冠-5-4'-甲氧基偶氮苯和4-氮杂15-冠-5-4'-硝基偶氮苯的合成及其分子内扭曲电荷转移的光致变色机理.     

新型含咔唑环芳氨基乙酰腙衍生物的合成及其蛋白酪氨酸磷酸酶1B(PTP1B)抑制活性评价

为寻找新型蛋白酪氨酸磷酸酶1B (PTPlB)抑制剂,设计并合成了一系列新型含咔唑环芳氨基乙酰腙衍生物.其结构和构型用IR、1H NMR、13C NMR和2D NMR(包括1H-1H COSY、1H-13C HMBC和NOESY)谱及元素分析进行了确证.通过对PTPlB抑制活性的测试发现,目标化合物对PTPlB有较强的...     

以咔唑为给体的分子内电荷转移化合物的自组装及发光性质

设计合成了两种以咔唑为给体单元,苯并噻二唑为受体单元的分子内电荷转移化合物((E)-4-((4-(4-(9H-咔唑-9-基)苯乙烯基)苯基)乙炔基)-7-溴苯[c][1,2,5]噻二唑(CzPB-Br)和4,7-双((4-((E)-4-(9H-咔唑-9-基)苯乙烯基)苯基)乙炔基)苯[c][1,2,5]噻二唑(CzPBPCz))。 研究了紫外、荧光等光物理性质,发现CzPB-Br和CzPBPCz的溶液态在可见区域404和442 nm有明显特征紫外可见吸收峰,同时在557和588 nm处有明显的荧光发射。 结合理论计算考察了共轭长度对两种化合物性能的影响。 两个化合物利用给-受分子间的偶极-偶极、π-π等相互作用,通过良溶剂向不良溶剂扩散和热饱和溶液析出的自组装方法,分别获得了一维微米线、多边形微米片等聚集态结构。 其中,一维的微米线宽度为1~2 μm,长度可达100 μm以上。 一维微米线和多边形微米片分别在515和568 nm处显示出了较强的发光,同时还显示出了光波导的特征,为获得高性能低维有机光电纳米材料提供了新思路。     

Synthesis of 2-Azastilbene Derivatives with Intramolecular Charge Transfer

The condensation reaction of 2-cyanomethyl-5-nitropyridine with aromatic aldehydes has been carried out with the aim of preparing 2-azastilbene derivatives having intramolecular charge transfer. The yield of the condensation products can be increased if the reaction is carried out in the medium used for obtaining the starting 2-cyanomethyl-5-nitropyridine without separating or purifying it. The electronic absorption spectra of the compounds show a charge-transfer band, the energy of which increases and the intensity falls with lowering of the electron-donor properties of the substituent in the 4-position. Introduction of the heteroatom into the acceptor part when changing from the stilbene to the 2-azastilbene system is accompanied by a decrease in the energy and increase in the intensity of the charge-transfer electronic transition.     

Synthesis and Cyclization-Induced Charge Transfer of Rectangular Bisterthiophenesiloxanes

Cyclization-modified terthiophene displays the change of emission behavior from locally excited (LE) to the intramolecular charge transfer (ICT) state. The rectangular bisterthiophenesiloxanes (DSiTh) was successfully prepared by π–π-stacking-aided hydrogen-bonding interactions. Cyclization-induced ICT in DSiTh could be observed, which was confirmed by absorption spectra, fluorescence spectra, and quantum chemistry analysis. The cyclization produces a strong intramolecular electron redistribution of a highly packed π-conjugated terthiophene. Thus, a distinctive variation of the dipole moment and a through-space ICT happen.     

含酰基吡唑啉酮和咔唑光功能基元的新型席夫碱的合成

以苯肼、乙酰乙酸乙酯和咔唑为原料,合成了一种含酰基吡唑啉酮和咔唑双光功能基元的新型席夫碱———1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5缩N-对氨基苄基咔唑(6),其结构经1H NMR和IR确证;采用UV-vis对其电子结构进行了初步研究,与酰基吡唑啉酮或咔唑功能基元相比,6表现出特殊的电子结构。     

Sensitization of Photoconductivity in Polymeric Compositions with Fe2O3 and CdS Nanoparticles by an Organic Compound with Intramolecular Charge Transfer

The electric conductivity and photoconductivity of films based on polyvinylbutyral and containing Fe₂O₃ and CdS nanoparticles and an organic compound with intramolecular charge transfer as photoconductivity sensitizer in the visible and near infrared regions were investigated. In the absorption region of the sensitizer the activation energy of the photocurrent is somewhat greater than 0.1 eV and is close to the activation energy of the electric conductivity current.     

Indolizino[5,6‐b]quinoxaline Derivatives: Intramolecular Charge Transfer Characters and NIR Fluorescence

Indolizino[5,6‐b]quinoxaline derivatives ( 1 a and 1 b ) with a push–pull structure were prepared to show intramolecular charge‐transfer properties. Compounds 1 a and 1 b are strongly fluorescent in aprotic solvents while symmetrical derivatives ( 2 a and 2 b ) were non‐fluorescent. The π‐expanded α–α linked dimer ( 10 ) of indolizino[5,6‐b]quinoxaline 1 b was serendipitously obtained to show NIR absorption over 800 nm and the fluorescence edge reached to 1400 nm.     

含咔唑生色团的聚磷腈的合成与表征

通过后重氮偶合方法制备了一种含咔唑双功能生色团的聚磷腈光折变高分子,并用1H-NMR3、1P-NMRI、R、UV-vis、GPC以及DSC、TG等测试手段对聚合物进行了分析和表征。1H-NMR、IR、UV-vis谱图表明对硝基偶氮苯基团连接在咔唑环上。31P-NMR谱图上的单峰说明聚二氯磷腈分子链上的氯已经全部被咔唑基团取代,而且后功能化反应条件没有破坏磷腈主链结构。GPC测得聚磷腈的Mw=1.28×104。热分析结果显示聚磷腈的Tg=20℃,并在300℃开始分解。     

吩噻嗪给体受体衍生物激发态的电荷转移

A series of N-bonded donor-acceptor derivatives of phenothiazine containing phenyl （PHPZ）, anisyl （ANPZ）, pyridyl （PYPZ）, naphthyl （NAPZ）, acetylphenyl （APPZ）, and cyanophenyl （CPPZ） as an electron acceptor have been synthesized. Their photophysical properties were investigated in solvents of different polarities by absorption and emission techniques. These studies clearly revealed the existence of an intramolecular charge transfer （ICT） excited state in the latter four compounds. The solvent dependent Stokes shift values were analyzed by the modified Lippert-Mataga equation to obtain the excited state dipole moment values. The large excited state dipole moment suggests that the full （or nearly full） electron transfer take place in the A-D systems. In the system of A-D phenothiazine derivatives, the transition dipole moments Mflu were determined mainly by direct interactions between the solvent-equilibrated fluorescence ^1CT state and ground state because of their lack of significant change with increase of the solvent polarity. The electron structure and molecular conformation of phenothiazine derivatives will be significantly changed with the increase of the electron affinity of the N-10 substituent.