D-π-A分子H-聚集体的电子光谱  

Spectral Studies of H-Aggregate of D-π-A Molecule

作　　者：陈思光[1] 姜月顺[1] 卢然[1] 杨文胜[1] 杨继华[1] 李铁津 杜祖亮[2] 

机构地区：[1]吉林大学化学系,长春130023 [2]河南大学物理系,开封475001

出　　处：《高等学校化学学报》2001年第2期245-248,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金!(批准号 :6 9890 2 2 6 );河南省固体润滑和功能材料重点实验室资助

摘　　要：合成了具有强电子给体和强电子受体的D π A分子 5 (4 N ,N 二甲氨基苯乙烯基 ) (1H ,3H) 2 ,4,6 嘧啶三酮 (AB1)和 5 (4 N ,N 双十八烷基氨基苯乙烯基 ) (1H ,3H) 2 ,4,6 嘧啶三酮 (AB18) ,并对其电子光谱进行了研究 .AB18在环己烷中聚集体的吸收光谱及AB1和AB18的表面光电压谱在 45 0nm附近出现H 聚集体的谱带 ,比其在氯仿溶液中单体的ICT带蓝移了 30nm左右 .AB1和AB18固体及其高浓度的氯仿溶液分别在 6 2 0nm和 6 10nm附近出现来源于H 聚集体的激基缔合物的荧光 ,6 2 0nm带比单体红移 3 0 0 0cm-1左右 .还探讨具有强电子给体和受体的D π A分子间π π相互作用 .D-π-A molecules bearing strong electron donor and acceptor, 5-(4-N,N-dimethyl amino-benzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB_1) and 5-(4-N,N-dioctadecylaminobenzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB_18) were synthesized and their spectral properties were investigated. For AB_1 and AB_18, their UV-visible absorption spectra in cyclohexane and surface photovoltage spectra show peaks at 450 nm due to the formation of H-aggregate, which underwent a blue-shift about 30 nm than that of monomer intramolecular charge transfer(ICT) band in chloroform. The fluorescence emission band of excimer of H-aggregate in solid and at a high concentration in chloroform solution occurs at 620 nm and near 610 nm, respectively. The band at 620 nm underwent a red-shift about 3 000 cm^-1 than that of monomer. In addition, intermolecularπ-π interactions of such D-π-A molecules possesing strong electron donor and acceptor are discussed.

关 键 词：D-π-A分子 H-聚集体 荧光光谱 ICT激光态 电子光谱 Π-Π相互作用 

分 类 号：O641[理学—物理化学]