Tunable Emission of Iridium(III) Complexes Bearing Sulfur-Bridged Dipyridyl Ligands
作者:Christopher M. Brown、Mitchell J. Kitt、Zhen Xu、Duane Hean、Maria B. Ezhova、Michael O. Wolf
DOI:10.1021/acs.inorgchem.7b02439
日期:2017.12.18
Proligands bis(pyridin-2-yl)sulfane (1a), 2,2′-sulfinyldipyridine (1b), 2,2′-sulfonyldipyridine (1c), bis(4-methylpyridin-2-yl)sulfane (2a), 2,2′-sulfinylbis(4-methylpyridine) (2b), and 2,2′-sulfonylbis(4-methylpyridine) (2c) were synthesized, characterized, and employed as the N∧N ancillary ligand. Changing the oxidation state of the sulfur atom serves as a switch to alter the emissive state from that
一系列的六个新的环金属化的铱(III)配合物[Ir(PPY)2(N ∧ N)] [PF 6 ](PPY = 2-苯基吡啶)在本文中报道。配体双(吡啶-2-基)亚砜(1a),2,2'-亚磺酰基二吡啶(1b),2,2'-亚磺酰吡啶(1c),双(4-甲基吡啶-2-基)亚砜(2a),2 ,2'-sulfinylbis(4-甲基吡啶)(图2b),和2,2'-磺酰基双(4-甲基吡啶)(图2c)的合成,其特征在于,和所采用作为N ∧ ñ辅助配体。改变硫原子的氧化态可作为将发射态从主要的3LC字符(蓝绿色发射)至3 MLCT / 3 LLCT字符(黄色发射)之一。硫化物和亚砜络合物Ir(1a),Ir(1b),Ir(2a)和Ir(2b)在CH 2 Cl 2溶液中由3产生的振动结构相同,发射峰分布最大,分别为478、510、548 nm。LC状态。相反,砜配合物Ir(1c)和Ir(2c)显示出宽泛的红移3 CT发射(分别为552和537