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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Luminescent bis-tridentate ruthenium(ii) and osmium(ii) complexes based on terpyridyl-imidazole ligand: Synthesis, structural characterization, photophysical, electrochemical, and solvent dependence studies
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Luminescent bis-tridentate ruthenium(ii) and osmium(ii) complexes based on terpyridyl-imidazole ligand: Synthesis, structural characterization, photophysical, electrochemical, and solvent dependence studies

机译：基于吡啶基-咪唑配体的发光双三齿钌（ii）和（ii）配合物：合成，结构表征，光物理，电化学和溶剂依赖性研究

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Homo- and heteroleptic bis-tridentate ruthenium(ii) and osmium(ii) complexes of compositions [(tpy-PhCH _3)Ru(tpy-HImzPh _3)](ClO _4) _2 (1), [(H _2pbbzim)Ru(tpy- HImzPh _3)] (ClO _4) _2 (2) and [M(tpy-HImzPh _3) _2](ClO _4) _2 [M = Ru ~II (3) and Os ~II (4)], where tpy-PhCH _3 = p-methylphenyl terpyridine, H _2pbbzim = 2,6-bis(benzimidazole-2-yl)pyridine and tpy-HImzPh _3 = 4′-[4-(4,5-diphenyl-1H-imidazol-2-yl)-phenyl]-[2, 2′:6′,2′′]terpyridine, have been synthesized and characterized by using standard analytical and spectroscopic techniques. These compounds were designed to increase the room temperature excited-state lifetimes of bisterpyridine-type ruthenium(ii) and osmium(ii) complexes. The X-ray crystal structures of two homoleptic complexes 3 and 4 have been determined and show that both the compounds crystallized in orthorhombic form with space group Fddd. The photophysical and redox properties of the complexes have been thoroughly investigated. All the complexes display moderately strong luminescence at room temperature with lifetimes in the range of 6-35 ns. The complexes are found to undergo one reversible oxidation in the positive potential window (0 to +1.6 V) and one irreversible and two successive quasi-reversible reductions in the negative potential window (0 to -2.0 V). The influence of solvents on the photophysical properties of the complexes has also been investigated in detail.
机译：组成[[tpy-PhCH _3）Ru（tpy-HImzPh _3）] [ClO _4）_2（1），[（H _2pbbzim）Ru（）的同配和杂配双三齿钌（ii）和（ii）配合物tpy- HImzPh _3）]（ClO _4）_2（2）和[M（tpy-HImzPh _3）_2]（ClO _4）_2 [M = Ru〜II（3）和Os〜II（4）]，其中tpy -PhCH _3 =对甲基苯基吡啶，H _2pbbzim = 2,6-双（苯并咪唑-2-基）吡啶和tpy-HImzPh _3 = 4'-[4-（4,5-二苯基-1H-咪唑-2- yl）-苯基]-[2，2'：6'，2'']叔吡啶已通过标准分析和光谱技术合成并表征。设计这些化合物的目的是提高二吡啶类钌（ii）和（ii）配合物的室温激发态寿命。已经确定了两种均质络合物3和4的X射线晶体结构，并且表明这两种化合物以正交晶形式结晶且具有空间群Fddd。配合物的光物理性质和氧化还原性质已被彻底研究。所有复合物在室温下均显示中等强度的发光，寿命为6-35 ns。发现该络合物在正电势窗口（0至+1.6 V）中经历了一种可逆的氧化，在负电势窗口中（0至-2.0 V）发生了一种不可逆的和两次连续的准可逆的还原。还详细研究了溶剂对配合物的光物理性质的影响。

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