A new coumarin laser dye 3-(benzothiazol-2-yl)-7-hydroxycoumarin
A new coumarin laser dye 3-(benzothiazol-2-yl)-7-hydroxycoumarin
复制标题
DOI：
10.1016/j.optlastec.2004.04.003
复制
发表时间：
2005-04-01
影响因子：
5
通讯作者：
El-Daly, SA
中科院分区：
文献类型：
--
作者：
Azim, SA;Al-Hazmy, SM;El-Daly, SA
在不同溶剂中测量了 3-(苯并噻唑-2-基)-7-羟基香豆素 (BTHC) 的电子吸收、发射光谱以及荧光量子产率，并受溶剂极性 (Deltaf) 的影响。三乙胺对 BTHC 的去质子化是一个可逆过程。 BTHC具有相对光稳定性，在EtOH和DMF中光解量子产率(phi(c))分别为2 x 10(-4)和2.7 x 10(-4)。在不存在和存在分子氧的情况下测量了 BTHC 的荧光寿命，结果分别为 2.82 ns 和 2.78 ns。 BTHC 在乙醇中用氮激光 (gimel(ex) = 337.1 nm) 泵浦时可充当良好的激光染料，并在 508 和 522 nm 处发出最大激光发射。 (C) 2004 Elsevier Ltd. 保留所有权利。
The electronic absorption, and emission spectra as well as fluorescence quantum yield of 3-(benzothiazol-2-yl)-7-hydroxycoumarin (BTHC) were measured in different solvents and are affected by solvent polarity (Deltaf) The deprotonation of BTHC by triethylamine is a reversible process. BTHC is relatively photostable, the quantum yield of photodecomposition (phi(c)) was found to be 2 x 10(-4) and 2.7 x 10(-4) in EtOH and DMF, respectively. The fluorescence lifetimes of BTHC were measured in the absence and in the presence of molecular oxygen and were found to be 2.82 and 2.78 ns, respectively. BTHC acts as good laser dye upon pumping with nitrogen laser (gimel(ex) = 337.1 nm) in ethanol and gives laser emission with maxima at 508 and 522 nm. (C) 2004 Elsevier Ltd. All rights reserved.