The Role of Substituent Effects in Tuning Metallophilic Interactions and Emission Energy of Bis-4-(2-pyridyl)-1,2,3-triazolatoplatinum(II) Complexes.
The Role of Substituent Effects in Tuning Metallophilic Interactions and Emission Energy of Bis-4-(2-pyridyl)-1,2,3-triazolatoplatinum(II) Complexes.
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DOI：
10.1002/anie.201502390
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发表时间：
2015-06
影响因子：
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通讯作者：
M. Prabhath;J. Romanova;R. Curry;S. Silva;P. Jarowski
中科院分区：
文献类型：
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作者：
M. Prabhath;J. Romanova;R. Curry;S. Silva;P. Jarowski
研究了一系列5-取代吡啶-1，2，3-三唑基Pt（II）均配型配合物显示出弱的发射调谐性（范围从λ=397-408 nm）在稀（10（-6）M）乙醇溶液中的单体水平和强调谐性，在浓溶液（10（-4）M）和薄膜（范围从λ=487-625 nm）从二聚体激发态（准分子）。密度泛函计算（PBE 0）的结果将准分子中的这种“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线态金属到配体电荷转移（（1）MLCT）到单线态金属到配体电荷转移（（1）MMLCT）发射的变化，这与寿命测量一致。
The photoluminescence spectra of a series of 5-substituted pyridyl-1,2,3-triazolato Pt(II) 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 calculations (PBE0) attribute this "turn-on" sensitivity and intensity in the excimer to strong Pt-Pt metallophilic interactions and a change in the excited-state character from singlet metal-to-ligand charge transfer ((1)MLCT) to singlet metal-metal-to-ligand charge transfer ((1)MMLCT) emissions in agreement with lifetime measurements.