Luminescence that lasts from Pt(trpy)Cl+ derivatives (trpy=2,2′;6′,2″-terpyridine)
Luminescence that lasts from Pt(trpy)Cl+ derivatives (trpy=2,2′;6′,2″-terpyridine)
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DOI：
10.1016/s0010-8545(02)00041-3
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发表时间：
2002-07
影响因子：
20.6
通讯作者：
D. McMillin;Jeffrey J. Moore
中科院分区：
文献类型：
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作者：
D. McMillin;Jeffrey J. Moore
本报告概述了在溶液(trpy=2，2‘；6’，2“-联吡啶)中制备具有长寿命光致发光的铂(Trpy)Cl+衍生物的最新进展。TrPy络合物本身是生物大分子的多功能结合剂/报告探针，但除了在固体或低温玻璃中外，它是不发射的。所研究的衍生物是铂(4‘-R-T)Y+类型，其中4’-R-T表示trpy配体的4‘-取代形式，Y是假卤化物共配体。简单的卤化物置换产生了铂(Trpy)OH+衍生物，这促进了基于发光的DNA结合研究。其他在流体溶液中具有长寿命激发态的络合物还包括铂(4‘-NMe2-T)Cl+和铂(4’-Pyre1-T)Cl+，其中，Pyre1表示1-吡喃取代基。由于配体内的电荷转移特性，铂(4‘-NMe2-T)Cl+和铂(4’-Pyre1-T)Cl+都表现出较低的能量吸收峰值。开放的配位支持Lewis碱的猝灭，然而，随着激发态配体内轨道亲缘关系的增加，这种影响不那么明显。
This report outlines progress to date in preparing Pt(trpy)Cl+derivatives that exhibit long-lived photoluminescence in solution (trpy=2,2′;6′,2″-terpyridine). The trpy complex itself is a versatile binding agent/reporter probe for biological macromolecules but is non-emissive, except in solids or low-temperature glasses. Derivatives investigated are of the type Pt(4′-R-T)Y+, where 4′-R-T denotes a 4′-substituted form of the trpy ligand and Y is a pseudohalide co-ligand. Simple halide replacement yields the Pt(trpy)OH+derivative which has facilitated luminescence-based DNA-binding studies. Other complexes with long-lived excited states in fluid solution include Pt(4′-NMe2-T)Cl+and Pt(4′-Pyre1-T)Cl+, where Pyre1 designates a 1-pyrenyl substituent. Due to intra-ligand charge-transfer character, Pt(4′-NMe2-T)Cl+and Pt(4′-Pyre1-T)Cl+each exhibit relatively low energy absorption maxima. Open coordination sites support quenching by Lewis bases, however, the effect is less evident with increased intra-ligand orbital parentage in the excited state.