College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
J Fluoresc. 2011 Mar;21(2):545-54. doi: 10.1007/s10895-010-0741-y. Epub 2010 Oct 6.
This paper presents a variety of conjugated derivatives with different number of arms (4-styryl-triphenylamine: C1, 4,4'-di-styryltriphenylamine: C2, 4,4',4″-tri-styryltriphenylamine: C3). The linear absorption and fluorescence maxima and the molar extinction coefficients are in the order of C1<C2<C3 in various solvents. Two-photon absorption (TPA) up-converted emission of the derivatives were determined with Ti:sapphire femtosecond laser. The maximal TPA emission wavelength and the two-photon absorption cross section of the derivatives are also in the order of C1<C2<C3 in various solvents. The dipole moment changes of the derivatives between the excited state and the ground state were estimated from experiment, and they are in the order of C1<C2<C3, which is confirmed further by the molecular geometry optimization of the derivatives. The electron density distribution and the energy levels of the frontier orbital of the derivatives were analyzed. The cyclic voltammograms of the derivatives were performed and discussed.
本文提出了一系列具有不同臂数的共轭衍生物（4-苯乙烯基-三苯胺：C1、4,4′-二苯乙烯基-三苯胺：C2、4,4′,4″-三苯乙烯基-三苯胺：C3）。在各种溶剂中，线性吸收和荧光的最大波长和摩尔消光系数的顺序为 C1<C2<C3。使用钛宝石飞秒激光测定了衍生物的双光子吸收（TPA）上转换发射。在各种溶剂中，衍生物的最大 TPA 发射波长和双光子吸收截面也呈现出 C1<C2<C3 的顺序。通过实验估算了衍生物在激发态和基态之间的偶极矩变化，其顺序为 C1<C2<C3，这进一步通过衍生物的分子几何优化得到了证实。分析了衍生物的前沿轨道的电子密度分布和能级。对衍生物进行了循环伏安法测定并进行了讨论。
