Trinuclear and Tetranuclear Re(I) Rings Connected with Phenylene, Vinylene, and Ethynylene Chains: Synthesis, Photophysics, and Redox Properties
Trinuclear and Tetranuclear Re(I) Rings Connected with Phenylene, Vinylene, and Ethynylene Chains: Synthesis, Photophysics, and Redox Properties
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DOI：
10.1021/acs.inorgchem.5b01397
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发表时间：
2015-09-07
影响因子：
4.6
通讯作者：
Ishitani, Osamu
中科院分区：
文献类型：
--
作者：
Rohacova, Jana;Sekine, Akiko;Ishitani, Osamu
合成了一系列具有高发光的三核和四核环状Re（I）配合物，其中Re单元与刚性双齿膦配体，即双（二苯基膦基）-对苯撑、-反式-亚乙烯基和-亚乙炔基连接，并对其进行了充分表征。它们的强发射性质和它们的三重态金属-配体电荷转移激发态的长寿命主要源于2，2 '-联吡啶（bpy）配体和膦配体的苯基之间增强的刚性诱导的配体间相互作用。此外，另一种类型的interligand之间的相互作用也观察到bpy配体和膦桥连基团，这种相互作用也强烈影响的电子物理和氧化还原性质的Re-环。
A series of highly luminescent trinuclear and tetranuclear ring-shaped Re(I) complexes wherein the Re units are linked with rigid bidentate phosphine ligands, namely, bis(diphenylphosphino)-p-phenylene, -trans-vinylene, and -ethynylene, were synthesized and fully characterized. Their strong emissive properties and the long lifetimes of their triplet metal-to-ligand charge transfer excited states originate primarily from enhanced, rigidity-induced interligand interactions between the 2,2'-bipyridine (bpy) ligand and the phenyl groups of the phosphine ligands. In addition, another type of interligand interaction was also observed between the bpy ligand and the phosphine-bridging group; this interaction also strongly affected the photophysical and redox properties of the Re-rings.