Synthesis and blue-violet two-photon excited fluorescence of a new organoboron compound

• DOI: 10.1016/j.molstruc.2007.03.036
• Publication Date: 2007-03-28T11:17:53Z
• Authors: Duxia Cao; Zhiqiang Liu; Guozhong Li; Guoqun Liu; Guohui Zhang
• Keywords: Carbazole; Two-Photon Absorption; Two-photon excitation microscopy

A new A-π-D-π-A type organoboron compound, 3,6-bis(dimesitylboryl)-N-butyl-carbazole (abbreviated as BBC), with trivalent boron as electron acceptor and carbazole as electron donor and π-conjugated core, has been synthesized and its single and two-photon related photophysical properties experimentally investigated. Pumped by 720 nm laser pulses in femtosecond regime, it showed strong two-photon excited blue-violet fluorescence at 393 nm in toluene and 403 nm in THF. The measured two-photon absorption cross-section by two-photon fluorescence method in toluene and THF is 34 GM and 38 GM, respectively.