Tong Ka-Ming, Toigo Jessica, Patrick Brian O, Wolf Michael O
Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
Inorg Chem. 2023 Aug 21;62(33):13662-13671. doi: 10.1021/acs.inorgchem.3c02124. Epub 2023 Aug 9.
A series of six new rhenium(I) tricarbonyl complexes [Re(CO)(N-N)Br] bearing sulfur-bridged dipyridyl (N-N) ligands with three different oxidation states (sulfide (S), sulfoxide (SO), and sulfone (SO)) are described. Spectroscopic studies show that changing the oxidation state of the ligands influences the photophysical properties of the complexes, with complexes and containing the sulfone ligand exhibiting a lower energy MLCT absorption band tailing into the visible region. Solution-state emission measurements show that these complexes exhibit readily tunable emission energies from 480 to 610 nm, depending on the oxidation state of the sulfur bridge and the presence of substituents on the pyridyl rings. Solid-state emission measurements show that the emission is significantly red-shifted upon oxidation of the sulfur bridge to sulfone with enhanced photoluminescence quantum yield.
本文描述了一系列六种新型的铼（I）三羰基配合物[Re(CO)(N-N)Br]，其带有具有三种不同氧化态（硫化物（S）、亚砜（SO）和砜（SO））的硫桥联二吡啶（N-N）配体。光谱研究表明，改变配体的氧化态会影响配合物的光物理性质，含有砜配体的配合物 和 表现出较低能量的MLCT吸收带，拖尾进入可见光区域。溶液态发射测量表明，这些配合物根据硫桥的氧化态和吡啶环上取代基的存在，表现出从480到610 nm易于调节的发射能量。固态发射测量表明，当硫桥氧化为砜时，发射显著红移，同时光致发光量子产率提高。
