1,3-二-(3,3-二甲基-2-甲烯假吲哚)方酸菁染料的合成及其晶体

合成了两个新型方酸菁染料3和5。在酸催化下,2,3,3-三甲基假吲哚不需N-烷基化,可直接与方酸反应。反应过程中发生了明显的质子转移。结晶学数据表明,分子3的整体位于同一平面;溶剂苯规则地排布在方酸四碳环的周围,后者酷似电子陷阱。染料5有良好的水溶性。     

Cyanine Dyes Containing Quinoline Moieties: History,Synthesis, Optical Properties,and Applications

Cyanine dyes carrying quinoline moieties are an important class of organic molecules that are of great interest for applications in many fields like medicine, pharmacology, and engineering. Despite their exceptional properties, such as stability, high molar extinction coefficients, and high pH-sensitivity, this class of dyes has been less analyzed and reviewed in the last few decades. Therefore, this review article focuses on discussing the history of quinoline compounds, various synthetic routes to prepare quinolinium salts and symmetrical and asymmetrical mono-, di-, tri-, penta- and heptamethine cyanine dyes, containing quinoline moieties, together with their optical properties and applications as photosensitizers in photodynamic therapy, probes in biomolecules for labeling of nucleic acids, as well as imaging agents.     

冠醚菁染料及其中间体的特征红外光谱

本文首次报道冠醚菁染料3,3’-二乙基-5,6,5’,6’-双骈-(15-冠-5)-硫碳菁碘盐(1)和3,3’-二乙甲基-5,6-骈-(15-冠-5)-硫碳菁碘盐(2)以及合成中间体:4’-溴5’-硝基-苯骈-15-冠-5(3),2.2’-二硝基-4,5,4’,5’-双骈-(15-冠-5)-二本基二硫化物(4),2-甲基-5,6-骈-(15-冠-5)-苯骈噻唑(5)和2-甲基-3-乙基-5,6-骈-(15-冠-5)-苯骄噻唑碘盐(6)的特征红外光谱图。     

Study of The Thermal Decomposition of Some New Cyanine Dispersed Dyes

The structure of the studied compounds was confirmed by elemental analysis, IR and NMR. TG and DTG data were used to study the kinetics of the thermal decomposition process of some new cyanine dispersed dyes derived from 2-[(p-chloro)-styryl]-6-[5-(3-aryl-rhodanine)]-1,2-dihydropyridine. The reaction was found to follow first order mechanism. The activation energy E_a was calculated and used to calculate the thermodynamic parameters enthalpy change (H^*), entropy change (S^*), and free energy change (G^*), related to the thermal decomposition process. Two different calculation methods including Coats—Redfern and Chatterjee were applied to evaluate thekinetic and thermodynamic parameters. Quantum study was performed to support both the structure and the thermal data.This revised version was published online in November 2005 with corrections to the Cover Date.     

1-(取代吡唑-4-甲酰基)吡唑类化合物的合成及生物活性研究

设计合成了25个新型1-取代吡唑甲酰基吡唑系列衍生物,化合物结构经¹HNMR、元素分析、IR和MS确证.生物活性测试结果表明,该类化合物具有一定除草活性,讨论了其结构与活性的关系.     

四甲川苯乙烯菁染料的合成及其激光性能

合成了一系列四甲川苯乙烯菁染料。以Nd:YAG锁模激光倍频(532nm)作泵浦源,测定了染料的激光性能,包括激光调谐范围、中心激光波长、激光转换效率及稳定性。探讨了该类分子结构与其激光性能之间的关系。     

Design,Synthesis and Biological Activity of Ethyl 2-（N-Substituted-arylsulfonamido）-2-oxoacetate

Thirteen new ethyl 2-（N-substituted-arylsulfonamido）-2-oxoacetates（3a-3m）, based on the structure of Ketol-acid reductoisomerase（KARI） inhibitor IpOHA, were designed and synthesized. Their structures were established on the basis of ^1H NMR, IR, MS, and elemental analyses. The bioassay result reveals that the structural changes from hydroxyl group on the N atom of IpOHA to arylsulfonyl groups does not enhance the inhibitory activity of the compounds to KARI in vitro. Compounds 3c, 3h, 3k, and 3m are more effective than IpOHA against the monocotyledonous bamygrass at 100 ug/mL in herbicidal tests.     

阴阳离子菁染料超快荧光动力学特性研究

采用飞秒荧光上转换技术,研究了阴阳离子菁染料及对应的阴离子和阳离子菁染料吸附在立方型和T型溴碘化银表面上形成J-聚集体的荧光衰减时间分辨特性,分析了几种菁染料增感体系的超快电子转移动力学过程及其对增感效率的影响.通过比较几种菁染料增感体系的荧光衰减特性,两种阴阳离子染料要明显快于阴离子染料、阳离子染料及二者的加合,说明阴阳离子染料聚集体到溴碘化银的电子注入速率较快,增感效果更好.对两种阴阳离子染料聚集体荧光衰减特性的比较,可以看出染料在T型颗粒溴碘化银上形成聚集体的荧光寿命更短,因而对T型颗粒的增感效果更好.染料Dye2的荧光衰减要快于染料Dye1,说明染料Dye2到溴碘化银的电子注入速率更快,增感效率更高.     

Evidence for the Cyclodextrin Mediated Aggregation of Cyanine Dyes into Oligomers

Based on the analysis of UV/Vis-and CD spectra of several cyanine dyes in - and -cyclodextrin a case is made for the aggregation of the dyes into oligomers. The criteria for this new type of aggregates are: (i) the appearance of a concentration and temperature dependent shoulder on the high energy side of the dimer band in the UV/Vis-spectra; (ii) two oppositely signed high intensity CD absorptions, one centered at the shoulder, the other at about the energy of the monomer absorption. Calculations based on coupled-oscillator theory support the contention that chiral dye aggregates are formed in the presence of cyclodextrins, most probably trimers and tetramers. From UV/Vis- and CD-data a helically twisted sandwich structure is suggested for these aggregates. In contrast to the reported inclusion complexes these aggregates must form — at least partly — outside the chiral host.     

含碲唑杂环的不对称碳菁及方酸菁的合成与性质

以苯并碲唑季铵碘盐为原料，将其与３－乙基－２－（β－乙酰苯胺）乙烯工噻唑磺化季铵盐在无水吡啶中回流，得到４个含碲不对称碳菁染料，上述季铵盐与方酸的反应不 般杂环碱，只能发生１：１缩合反应，缩合产物与苯并噻唑碘盐在正丁醇／吡啶中反应即得含碲不对称方酸菁染料，该法避免了通常制备不对称方酸菁所带来的分离纯化的困难，从而提供了制备不对称方酸碲菁染料的通用方法，研究了不对称碲碳菁的“Ｂｒｏｏｋｅｒ偏差”，结     

桥链七甲川菁的合成及光性能

菁是一种具有多功能用途的染料,除用作卤化银感光材料及有机光导材料的光谱增感剂、光记录材料中记录介质外,还可作为染料激光器中用的激光染料.我们曾合成了四甲川苯乙烯菁、五甲川(艹粦)及五甲川吡喃鎓等红外染料作为激光染料,测定了它们的光性能.本文合成了具有桥链的七甲川菁,研究了这些桥链七甲川菁的吸收光谱及荧光光谱,并以YAG激光倍频(532nm)作泵浦源,测定了它们的激光调谐范围、中心波长及激光转换效率.     

含1,3,4-噻二唑环吡唑并[3,4-d]嘧啶类化合物的合成及生物活性

通过5-氨基-4-氰基-1-苯基吡唑与甲酸发生环合、再经氯化和芳香族亲核取代反应,合成了12种新的含1,3,4-噻二唑环吡唑并[3,4-d]嘧啶类化合物.目标化合物的结构经红外光谱、核磁共振氢谱、质谱和元素分析方法予以确认.初步的生物活性测定试验表明,在50 mg/L浓度下,大部分目标化合物对小麦纹枯病菌(Rhizoctonia cerealis)表现出较好的杀菌活性,其中化合物5b,5d和5j的抑菌率超过90%.     

Synthesis and Visible Spectral Behaviour of Some New N‐Bridgehead Heterocyclic Cyanine Dyes Incorporating Pyrazolo (4,5‐b) Indolizine (Benzoindolizine)

The new unsymmetrical N‐bridgehead, apo (zeromethine), mono‐methine, dimethine, meso substituted tetramethine and styryl cyanine dyes incorporating pyrazolo (4,5‐b) indolizine (benzoindolizine) nuclei were prepared. Structural confirmation was carried out by elemental analyses, IR, H‐NMR, mass spectra and ¹³C‐NMR with the aid of carbon DEPT spectral data. The visible absorption spectra for the newly synthesized cyanines were examined in 95% ethanol.     

Synthesis,Structure and Biological Activities of 2-(1H- 1,2,3-Benzotriazol-1-yl)-1-(4-methylphenyl)-2- (1H-1,2,4-triazol-1-yl)-1-ethanone

IntroductionTriazole derivatives have become the most rapidlyexpanding group of antifungal compounds with advanta-ges of lowtoxicity, high oral bioavailability and broad-spectrum antifungal activity, which can be used againstfungi including most yeasts an…     

多烯和花菁染料分子设计及其非线性光学性质研究进展

根据一种新的增强分子非线性光学性质的设计思想 ,讨论了多烯和花菁染料的结构和性质关系 ,综述了这类染料的非线性光学性质及其应用进展 ,并对有机非线性光学材料的发展前景进行了预测。     

Synthesis and Characterization of Some Novel Dichromophoric Cyanine Dyes

Here, the synthesis of two novel series of dichromophoric cyanine dyes were reported. The first series of novel bis-azacyanine dyes 3a–d was afforded by reaction of 2-(1,3,3-trimethyle indoline-2-ylidene)acetaldehyde with diaminoaromatics, and the second series of novel bis-diazacyanine dyes 4a–d was obtained using quaternization of an amine group in disazo compounds, which were produced by the reaction of disazoaromatics with 2-methylene-1,3,3-trimethyle indoline. The products were identified by ¹H NMR, ¹³C NMR, infrared, UV-vis, and mass spectroscopy.     

含叔丁基吡喃鎓方酸菁染料的合成及溶解性能研究

合成了四个对称及不对称含叔丁基吡喃鎓方酸的菁染料,通过光谱和元素分析确定其结构,测定了它们的紫外-可见吸收光谱、熔点和溶解性能。结果表明吡喃鎓方酸菁染料比一般菁染料具有更长的吸收波长和更好的溶解性能。用Dye2的单晶分子堆积图解释了染料的熔点反常现象。     

Synthesis,Characterization and Biological Activity of (Z)-1-[2-(Triphenylstannyl]Cyclopentanol and Their Phenylhalostannyl Derivativies

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｉｏｄｏｄｅｍｅｔａｌａｔｉｏｎ［１］ｏｆｔｈｅｐｒｏｄｕｃｔｓｏｆｔｈｅｒｅａｃｔｉｏｎｓｂｅｔｗｅｅｎｔｒｉｐｈｅｎｙｌｔｉｎｈｙｄｒｉｄｅａｎｄｅｔｈｙｎｙｌ（ｈｙｄｒｏｘｙ）ｓｔｅｒｏｉｄｓ［２，３］ｙｉｅｌｄｓ...     

Relationship between the Molecular Structure of Cyanine Dyes and the Vibrational Fine Structure of their Electronic Absorption Spectra

Vibronic sub‐bands in the electronic absorption spectra of symmetrical cyanine dyes (see picture) are attributed to the symmetric C? C valence vibration of the polymethine chain in the excited state. The ³J(H,H) coupling constants in the polymethine chain can be used to characterize the bond localization within the chain in the ground state and thus to explain the intensity distribution of the sub‐bands.

     

Preparation,Antibacterial Activity and Absorption Spectra of Pyrazolo‐Oxadiazine Cyanine Dyes

A new pyrazolo[4,3‐e]‐1,3,4‐oxadiazine heterocyclic ring system was prepared and employed to synthesize cyanine dyes of different methine types, including monomethine (simple cyanine) and trimethine (carbocyanine). The antibacterial activity of all the newly synthesized compounds was investigated against some bacterial strains. The electronic absorption spectra of the dyes were studied in absolute ethanol. The structure of all the synthesized compounds was identified via elemental and spectroscopic analysis.