摘要
合成了一系列二噻吩衍生物类有机化合物:5,5’-二(对-N,N-二甲胺基苯乙烯基)-2,2’-二噻吩(BMSBT)与5,5’-二(对-N,N-二乙胺基苯乙烯基)-2,2’-二噻吩(BESBT),5,5’-二(对-N-环丁胺基苯乙烯基)-2,2’-二噻吩(BBSBT),5,5’-二(对-N-咔唑基苯乙烯基)-2,2’-二噻吩(BCSBT),并测定了其吸收光谱、单光子荧光光谱和双光子荧光光谱.BMSBT,BESBT和BBSBT的单光子荧光参数存在很强的、规则的溶剂效应,表明其激发态的分子可能有较大的极性.在800 nm fs激光下测得BMSBT与BESBT在560 um附近(与单光子荧光发射峰波长接近的位置)有较强的上转换荧光发射,上转换荧光强度与激发能量之间较好的平方关系表明了双光子激发的机理,这种上转换荧光被称为双光子荧光.用双光子荧光法测得BMSBT和BESBT的双光子吸收截面分别为54×10^(50)(cm^4·s)photon和102×10^(50)(cm^4·s)/photon.
Four new bithiophene derivatives 5, 5'-bis (p-N, N-dimethylaminostyryl)-2,2'-bithiophene (BMSBT), 5, 5'-bis ( p-N, N-diethylaminostyryl) -2, 2'-bithiophene ( BESBT), 5, 5'-bis ( p-N-cyclobutylaminostyryl) -2, 2'-bithiophene ( BBSBT) and 5, 5'-bis ( p-N-carbazoylstyryl) -2, 2'-bithiophene ( BCSBT) were synthesized. The absorption, single-photon excited fluorescence, two-photon excited fluorescence spectra have been recorded. BMSBT, BESBT and BBSBT show strong solvatochromism in their single-photon excited fluorescence, suggesting greater polarity of their excited states. The two-photon absorption cross. sections of BMSBT and BESBT were determined to be 54 x 10(-50) (cm(4).s) /photon and 102 x 10(-50) (cm(4).s) /photon separately by two-photon excited fluorescence method.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2003年第7期976-982,共7页
Acta Chimica Sinica
基金
国家自然科学基金(No.2017203)
高等学校骨干教师资助计划项目
国家重点基础研究发展规划(973)资助项目
