作者:Serena Ciorba、Benedetta Carlotti、Irena Škorić、Marija Šindler-Kulyk、Anna Spalletti
DOI:10.1016/j.jphotochem.2011.01.009
日期:2011.3
accompanied by a modest triplet production (that becomes substantial in the nitro-derivative) investigated by nanosecond laser flash photolysis. The solvent effect on the absorption and emission spectra and on the photobehaviour allowed to evidence the presence of charge transfer (CT) excited states in the dimethylamino- and, particularly, in the nitro-derivative.
合成了四种新颖的反式,反式-2,5-二苯乙烯基呋喃衍生物(E,E -X-DStFs,X = Cl,OCH 3,N(CH 3)2,NO 2),并以1 H和13为特征核磁共振和紫外可见光谱。通过固定和脉冲技术,并借助半经验量子力学计算,已经在两种极性不同的溶剂中研究了这些光反应性较差的化合物的激发态的光物理性质。这些系统的高荧光效率伴随着纳秒级激光闪光光解研究的适中的三重态产物(在硝基衍生物中变得相当重要)。溶剂对吸收光谱和发射光谱以及光行为的影响可以证明在二甲基氨基基团,尤其是在硝基衍生物中存在电荷转移(CT)激发态。