十六烷基三甲基氯化铵胶束中对二甲氨基苯甲酸的分子内扭转电荷转移

分子内扭转电荷转移(TICT)是近年来凝聚态光化学领域的热点课题之一.迄今的TICT研究主要集中于有机介质中,并且观察到随着介质极性提高,长波长处TICT荧光带(a带)与短波长处正常荧光带(b带)强度比I_a/I_b增大.这种相关性在水溶液中或由有机溶剂向水过渡时是否依然成立尚无明确结论.因此系统地研究水溶液中TICT性质并与有机介质中的比较对于发展和深化TICT理论和应用研究是必要的.本文将报道对二甲氨基苯甲酸(DMABOA)在十六烷基三甲基氯化铵(CTMAC)胶束溶液中TICT性质的稳态荧光光谱学研究

激发态光物理的拓扑控制：对（N，N＇－二正癸基）氨基苯甲腈的簇集与光诱导分子内电荷转移

在水－二氧六环混合介质中，对二正癸基氨基苯甲腈（ＤＤＡＢＮ）分子，在水的体积分数超过０．５后，发生簇集并可观察到双重荧光发射且长波长发射带位置与在纯二氧六环中相近。该发射带被证实系分子内扭转电荷转移（ＴＩＣＴ）带。吸收光谱表明ＤＤＡＢＮ簇集体为Ｊ－型

Chemical Sensing and Molecular Recognition Based on Intramolecular Charge Transfer Dual Fluorescence

［中文文摘］首先扼要地概述分子内电荷转移（ＩＣＴ） 的光物理模型， 随后回顾了基于ＩＣＴ 双重荧光的化学传感与分子识别．［英文文摘］The molecular recognition and chemical sensing based on the intramolecular charge transfer (ICT) dual fluorescence were reviewed after briefly describing the ICT photophysics.国家自然科学基金（29303023 ； 29675018）;福建省自然科学基金（B92005）

Twisted Intramolecular Charge Transfer of p-N, N-Dimethylaminobenzoic Acid in Cetyltrimethylammonium Chloride Micelle

Twisted intramolecular charge transfer (TICT) is one of the hot points in condensed phase photochemistry at the present time. Most of the studies on TICT up to now, however, are performed in organic medium, which leads to a correlation that the intensity ratio of the long-wavelength TICT fluorescence band (a band) to shortwavelength normal fluorescence band (b band), I_a/I_h, increases with the medium polarity. It is unknown whether such a correlation is applicable to aqueous solution or it is in the transition from organic solvent through water. Thus a systematic study of TICT in aqueous solution and its comparison with that in organic medium are significant for the development and deepening of the theory and application of TICT. In the present note, a steady-state fluorescence spectroscopic study of TICT of p-N, N-dimethylaminobenzoic acid (DMABOA) in aqueous cetyltrimethylammonium chloride (CTMAC) micellar solution is described

有序介质中二苯甲酰甲烷的酮醇互变异构

用紫外光谱法研究了二苯甲酰甲烷在β-环糊精及离子型和非离子型胶束介质中的酮醇互变异构性质,β-环糊精的引入或胶束的形成使酮醇异构平衡向烯醇式方向移动.结果表明,用二苯甲酰甲烷的酮醇互变异构性质能够表征有序介质的微环境性质,确定表面活性物质的临界胶束浓度

Photoinduced intramolecular charge transfer in self-assembly .1. Aggregation and dual fluorescence of ethyl p-didecylaminobenzoate in dioxane-water binary solvent

Aggregation of ethyl p-didecylaminobenzoate (EDDAB) in dioxane-water binary mixture was shown to occur at water volume fraction of 0.47 and a strong intramolecular charge transfer emission was observed in the aggregate

离子型胶束中分子内扭转电荷转移的盐效应

分子内扭转电荷转移(TICT)是目前凝聚态光化学领域中的前沿课题之一,这是因为TICT除具有特别的光物理化学性质外,在光合作用模拟以及非线性光学材料的研究中亦具诱人的前景。胶束被认为是一种膜模拟体系,因此研究胶束中的TICT不仅可在更近层次上模拟叶绿体光合作用的原的原初过程,而且对于研究其它有序组织体中的TICT和利用TICT特殊的光物理化学性质了解有序组织体的结构特征也将具有启发意义。本文报道利用稳态荧光光谱法和电导率法研究十六烷基三甲基溴化铵(CTMAB)胶束中对二甲氨基苯甲酸(DMABOA)TICT的盐效应,旨在阐明胶束界面双电层性质对TICT的影响以及影响的途径

离子型胶束中分子内扭转电荷转移的盐效应

分子内扭转电荷转移(TICT)是目前凝聚态光化学领域中的前沿课题之一,这是因为TICT除具有特别的光物理化学性质外,在光合作用原初过程模拟以及非线性光学材料的研究中亦具诱人的前景.胶束被认为是一种膜模拟体系,因此研究胶束中的TICT不仅可在更近层次上模拟叶绿体光合作用的原初过程,而且对于研究其它有序组织体(如LB膜,合成双分子膜以及真正的生物膜等)中的TICT和利用TICT特殊的光物理化学性质了解有序组

庆祝厦门大学化学学科创建九十年暨化工系创办二十年

火红的凤凰花开了又开,迎来送往"南强"学子九十度,厦门大学的化学学科也伴随着走过了九十载!1921年4月6日,爱国华侨领袖陈嘉庚先生创办厦门大学时,理科化学仅一名学生.九十年后的今天,化学学科已经拥有2300多名本科生、硕士生和博士生,300多名教职员工;学科门类齐全、教研设备先进、基础应用并重.九十年的发展凝聚了刘树杞、纪育沣、傅鹰、卢嘉锡、蔡镏生、钱人元、陈国珍等历代化学家、教育家的心血和努力!我们在规模和形式壮大的同时,更是沉淀了内涵,逐步形成"嘉庚化学"的风格

荷电胶束中分子内扭转电荷转移的醇效应

The effects of aliphatic alcohol on the twisted intramolecular charge transfer (TICT) of p-N, N-dimethylaminobenzoic acid (DMABOA) in cetyltrimethylammonium bromide (CTMAB) micelle were examined by the TICT-typical dual fluorescence. The introduction of aliphatic alcohol (CnH2n+10H, n=1, 2, 3, 4, 6, 8, 14, 16, 18) to CTMAB Ancellar solution does not change the positions of the dual fluorescence bands of DMABOA,but results in a decrease in the fluorescence intensities with that of the longer-wavelength TICT band (a band) more repidly, the latter is demonstrated by a linear decrease of the fluorescence intensity ratio of a band to b band (shorter-wavelength normal band) with the concentration of the alcohol added. The logarithm of the absolute value of the linear slope is positively linearly correlated with the carbon number(n) of the alkyl chain in the alcohol molecule when the chain is relatively short (<8), whereas a negatively linear correlation is observed when the chain length (n=14, 16, 18) is comparable..