Photophysical properties of 2,3-dihydroquinazolin-4(1H)-one derivatives
作者:Fanny A. Cabrera-Rivera、Jaime Escalante、Hugo Morales-Rojas、David F. Zigler、Robert D. Schmidt、Lauren E. Jarocha、Malcolm D.E. Forbes
DOI:10.1016/j.jphotochem.2014.07.005
日期:2014.11
2,3-Dihydroquinazolin-4(1H)-one (DHQ) derivatives were synthesized by treatment of isatoic anhydride with amines and subsequent cyclocondensation with aldehydes or ketones. The derivatives were characterized by 1H and 13C NMR, elemental analysis and HRMS. Absorption and emission spectra of DHQ derivatives were recorded in different solvents (hexadecane, benzene, chloroform, methanol and acetonitrile)
2,3-二氢喹唑啉-4(1 H)-one(DHQ)衍生物的合成方法是,用胺处理异戊酸酐,然后用醛或酮进行环缩合。衍生物通过1 H和13 C NMR,元素分析和HRMS进行表征。在不同的溶剂(十六烷,苯,氯仿,甲醇和乙腈)中记录了DHQ衍生物的吸收和发射光谱。吸收和发射最大值均与溶剂有关且发生红移。磨牙的消光系数确定为2364–4820 M -1 cm -1。化合物的斯托克斯位移很大,并且随着溶剂极性的增加而增加。对于吸收和发射过程显示的此特征和红移效应表明,这些荧光分子的偶极矩在激发态下高于基态。在DHQ 4的不同溶剂中获得了荧光量子产率和寿命。