Effects of Ligand Substitution on the Optical and Electrochemical Properties of (Pyridinedipyrrolide)zirconium Photosensitizers
作者:Yu Zhang、Dylan C. Leary、Anne M. Belldina、Jeffrey L. Petersen、Carsten Milsmann
DOI:10.1021/acs.inorgchem.0c02343
日期:2020.10.19
tetrahydrofuran (THF) solution, which allowed the isolation of photoluminescent, eight-coordinate Zr(HPDPH)2(THF)2. The photoredox catalytic dehalogenation of aryl iodides and aryl chlorides using the most reducing derivative, Zr(MePDPMe)2, highlights the potential of Zr(PDP)2 photosensitizers to promote challenging reductive transformations under mild conditions upon excitation with green light.
一系列七个双(吡啶并二吡咯烷)锆配合物Zr(R 1 PDP R 2)2,其中[ R 1 PDP R 2 ] 2–是[2,6-bis(5-R 1 -3 )的双去质子化形式-R 2 -1 H-吡咯-2-基)吡啶]的制备,并通过NMR,UV / vis吸收,发射光谱和循环伏安法在溶液中表征。通过单晶X射线晶体学确定分子结构。所有配合物表现出具有高的量子效率显着地长发射寿命(τ= 190-576微秒)(Φ PL= 0.10–0.38)在苯溶液中用可见光激发。吡咯环上的取代基显示出对这些化合物的光致发光和电化学性质具有显着影响。R 2取代基(R 2 = H,Me,Ph或C 6 F 5)对络合物的吸收和发射曲线仅显示有限的影响,但允许在一定范围内系统地调节基态和激发态氧化还原电势接近600 mV。R 1取代基(R 1 = H,Me,Ph或2,4,6-Me 3 Ph)通过电子效应影响光学和电化学性质。此外,R