三苯胺多枝化合物的合成及其荧光性质

Synthesis and fluorescence of triphenylamine multibranch chromophores

采用Heck反应合成了2个三苯胺多枝化合物N,N,N-三{5-(4-叔丁基苯基)-1,3,4-噁二唑-2-苯乙烯基-4-苯基}胺(化合物1)和N,N,N-三[4-{2-(3,5-二-[5-(4-叔丁基苯基)-1,3,4-噁二唑-2-]苯基}-1-乙烯基}苯基}胺(化合物2),并测定了它们的吸收光谱、单光子荧光光谱和双光子荧光光谱。化合物1和2在二氯甲烷溶液中单光子荧光发射峰分别位在536和487nm。在锁模Nd∶YAG激光器800nm激光照射下,化合物1和2发射出很强的双光子上转换荧光,其最大波长分别在541和518nm。

Two triphenylamine muhibranch chromophores N, N, N-tris-[4-（2-{ 4-[5-（ 4-tert-butyl-phenyl）-1, 3,4- oxadiazol-2-yl]-phenyl}-vinyl）-phenyl]amine（1） and N, N, N-tris[4-{ 2-（3,5-di- { 5-[4-（tert-butyl） phenyl]-1,3, 4-oxadiazol-2-yl） phenyl）-1-ethenyl） phenyl] amine（2） were prepared using Heck reaction. The absorption, single photon excited fluorescence, two-photon excited fluorescence spectra have been recorded. Using 400nm excitation wavelength in CHCl2, the single-photon excited fluorescence of 1 is in the green region with a peak at 536nm and chromophore 2 in the blue region with a peak at 487 nm. The very strong frequency-upconverted fluorescence emission with the central wavelength at 541nm and 518nm in the solution of CHCl2 can be easily observed from chromophores 1-2 solution excited with a Nd. YAG pumped dye laser at the wavelength 800nm in CHCl2 at a concentration of 10^-2mol/L.