Impact of substituents on the luminescent properties and thermostability of Zn(II) 8-hydroxyquinolinates: insight from experimental and theoretical approach
作者:Xiao-Ming Fang、Yan-Ping Huo、Zhi-Gang Wei、Guo-Zan Yuan、Bao-Hua Huang、Shi-Zheng Zhu
DOI:10.1016/j.tet.2013.09.064
日期:2013.11
lifetime, fluorescence quantum yield, and thermostability of Zn(II) complexes. Luminescent properties of the Zn(II) complexes correspond to the electron-withdrawing/-donating character of the arylethenyl substituents. Photophysical analyses combined with density functional theory (DFT) calculations established that the introduction of strong electron-withdrawing group (CN) decreased the HOMO–LUMO energy
合成并通过1 H NMR,ESI-MS,FTIR和元素分析对四个独特的2-芳基乙烯基-8-羟基喹啉配体(B1 - B4)及其相应的Zn(II)配合物(C1 - C4)进行了表征。通过几种技术研究了锌盐和配体在溶液中的聚集行为,包括1H NMR,UV-vis和光致发光(PL)。芳基乙烯基取代基的电子性质会影响Zn(II)配合物的吸收波长,发射颜色,荧光寿命,荧光量子产率和热稳定性。Zn(II)配合物的发光特性与芳基乙烯基取代基的吸电子/给电子特性相对应。光物理分析与密度泛函理论(DFT)的计算相结合,建立了强吸电子基团(CN)的引入减小了HOMO-LUMO的能隙,而给电子基团(叔丁基)的引入扩大了HOMO-LUMO的能隙能隙。