上转换荧光化合物DMSSB与CSSB的合成、结构与光物理性质

Synthesis, Structure and Photo-physical Properties of Two Novel Compounds DMSSB and CSSB with Up-conversion Fluorescence

以苯并噻唑为电子受体 ,以双苯乙烯基为共轭桥链 ,分别以二甲基胺和咔唑为电子给体合成了 2个新的有机化合物 DMSSB(反式 ,反式 - 2 - {4- [( 4- N ,N -二甲基胺 )苯乙烯基 ]苯乙烯基 }- 1,3-苯并噻唑 )和CSSB(反式 ,反式 - 2 - {4- [( 4- N -咔唑 )苯乙烯基 ]苯乙烯基 }- 1,3-苯并噻唑 ) .用 X射线衍射方法测定了 CSSB的晶体结构 .用波长为 80 0 nm的激光激发时 ,DMSSB与 CSSB在 THF中分别发出强的上转换橙色 ( λm ax=589nm)和蓝绿色荧光 ( λmax=4 88nm) . 2个化合物在不同溶剂中的光物理数据和理论计算结果表明 ,苯并噻唑基是一个很好的电子受体 .

Two novel organic compounds with benzothiazolyl as π electron acceptor, dimethylamino and carbazolyl respectively as π electron donor: DMSSB(trans, trans-2-{4-[4-(N,N-dimethylamino)styryl]styryl}-1,3-benzothiazole) and CSSB(trans, trans-2-{4-[(4-N-carbazolyl)styryl]styryl}-1,3-benzothiazole) were synthesized. The crystal structure of CSSB was determined by X-ray diffraction method. Pumped by 800 nm laser, DMSSB and CSSB respectively exhibited strong up-converted orange(λ max=589 nm) and blue-green(λ max=488 nm) fluorescence in THF, large two-photon absorption cross-section and large two-photon fluorescence emission cross-section. The photo-physical data in various solvents and theoretical calculation results indicate that benzothiazolyl is a good electron acceptor.