The Role of Substituent Effects in Tuning Metallophilic Interactions and Emission Energy of Bis-4-(2-pyridyl)-1,2,3-triazolatoplatinum(II) Complexes
作者:M. R. Ranga Prabhath、Julia Romanova、Richard J. Curry、S. Ravi P. Silva、Peter D. Jarowski
DOI:10.1002/anie.201502390
日期:2015.6.26
The photoluminescence spectra of a series of 5‐substituted pyridyl‐1,2,3‐triazolato PtII homoleptic complexes show weak emission tunability (ranging from λ=397–408 nm) in dilute (10−6 M) ethanolic solutions at the monomer level and strong tunability in concentrated solutions (10−4 M) and thin films (ranging from λ=487–625 nm) from dimeric excited states (excimers). The results of density functional
在单体上的稀(10 -6 M)乙醇溶液中,一系列5-取代的吡啶基1,2,3-三唑并Pt II络合物的光致发光光谱显示出弱的发射可调性(范围为λ = 397-408 nm)。在二聚体激发态(准分子)的浓缩溶液(10 -4 M)和薄膜(λ = 487–625 nm)中具有高水平的可调谐性。密度泛函计算(PBE0)的结果将准分子的这种“开启”灵敏度和强度归因于强Pt-Pt亲金属相互作用以及激发态特征从单重态金属到配体的电荷转移(1 MLCT)到单重金属-金属-配体电荷转移(1 MMLCT)排放,与寿命测量结果一致。