Huang Wei
2007
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Journal
Journal of Functional Biomaterials
Abstract
Two 1,3,4-oxadiazole derivatives {5-(4-tert-Butyl-phenyl)-oxadiazol-2-yl-phenyl-vinyl}-4-phenyl-diphenyl-amine(1) and 9-Ethyl-3,6-bis(2-{4-[5-(4-tert-butyl-phenyl)-oxadiazol-2-yl]-phenyl}-vinyl)-carbazole(2)were prepared using solid state synthesis.The absorption,single photon excited fluorescence,two-photon excited fluorescence spectra have been recorded.Using 400nm excitation wavelength in CHCl2 at a concentration of 10-5mol/L,the single-photon excited fluorescence of 1 is in the green region with a peak at 519nm and chromophore 2 in the blue region with a peak at 476nm.The very strong frequency-upconverted fluorescence emission with the central wavelength at 520 and 485nm 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.