Multichromophoric Bimetallic Ru(II) Terpyridine Complexes Based on Pyrenyl-bis-phenylimidazole Spacer: Synthesis, Photophysics, Spectroelectrochemistry, and TD-DFT Calculations
作者:Srikanta Karmakar、Dinesh Maity、Sourav Mardanya、Sujoy Baitalik
DOI:10.1021/ic501741r
日期:2014.11.17
A symmetrical bridging ligand, 5,11-bis(4-([2,2′:6′,2″-terpyridine]-4′-yl)phenyl)-4,12-dihydropyreno[4,5-d:9,10-d′]diimidazole (tpy-H2PhImzPy-tpy), containing terpyridyl coordinating units connected via a pyrenyl-bis-phenylimidazole spacer have been designed to synthesize a new class of light harvesting bimetallic Ru(II) complexes. The electronic properties of this complexes can be fine-tuned by varying
对称桥联配体5,11-双(4-([[2,2':6',2''-叔吡啶] -4'-基)苯基)-4,12-二氢吡啶并[4,5- d:9含有通过吡啶基-双-苯基咪唑间隔基连接的叔吡啶基配位单元的10,d - d ']二咪唑(tpy -H 2 PhImzPy-tpy)已被设计用于合成一类新型的光收集双金属Ru(II)配合物。该配合物的电子性质可以通过改变三齿末端配体来微调。在1的帮助下已完成了化合物的全面表征1 H NMR光谱,高分辨率质谱和元素分析。还使用密度泛函理论(DFT)对配合物进行了几何优化。电子吸收光谱在紫外线中表现出许多非常强烈的π–π *和n–π *跃迁,在可见光区域中表现出中等强度的MLCT和ILCT跃迁。有趣的是,本双金属配合物在室温下在657至703 nm范围内表现出中等强度的发光,在室温下的寿命(长组分)在5.8至67.0 ns之间,显示出发射特性对末端配体和溶剂类型的依赖性