mixture of static and dynamic pathways, reflecting the ZnL(R) ligand bulk and reduction potential. Steady-state Stern-Volmer plots were curved for ZnL(R) with less-bulky substituents (R = OMe, NO2), suggesting that both static and dynamic pathways were important for quenching. Transient Stern-Volmer data indicated that the dynamic pathway dominated quenching for ZnL(R) with bulky substituents (R = tBu, DtBu)
硝基芳香族化合物和硝基
烷烃淬灭Zn(Salophen)(H2Salophen = N,N'-亚
苯基-双-(3,5-二叔丁基
水杨
亚胺)的荧光; ZnL(R))络合物。制备了结构相关的ZnL(R)配合物家族(R = OMe,di-tBu,tBu,Cl,
NO2),并通过动力学和光谱方法相结合的方法研究了硝基芳香族化合物的荧光猝灭机理。ZnL(R)的荧光量子产率通常很高(Phi约为0.3),具有亚纳秒的荧光寿命。ZnL(R)的荧光由硝基芳族化合物通过静态和动态途径的混合物淬灭,反映了ZnL(R)
配体的体积和还原电位。对于具有较小体积取代基(R = OMe, )的ZnL(R),稳态Stern-Volmer图是弯曲的,提示静态和动态途径对于淬灭都很重要。瞬态Stern-Volmer数据表明,动态途径主导着具有大量取代基(R = tBu,DtBu)的ZnL(R)的猝灭。具有不同硝基芳族化合物(ArN