Efficient Generation of Singlet Oxygen and Photooxidation of Sulfide into Sulfoxide via Tuning the Ancillary of Bicyclometalated Iridium(III) Complexes
作者:Li-Ping Li、Bao-Hui Ye
DOI:10.1021/acs.inorgchem.9b00220
日期:2019.6.17
The influence of the metal-based highest occupied molecular orbital on triplet-state lifetime, triplet-state quantum yield, and 1O2 generation quantum yield as well as aerobic photo-oxidation of sulfide into sulfoxide was evaluated via tuning the ancillary ligand of Ir(pq)2 complexes. The results revealed that 1h with chelate ancillary ligand bearing electron-donating group possesses a high 1O2 generation
以2-苯基喹啉(pq)为环金属化配体,一系列阳离子Ir(III)络合物[Ir(pq)2(L1)2 ](PF 6)(L1为吡啶(1a),4-甲氧基吡啶(1b) ,4-二甲基氨基吡啶(1c)和4-乙酰基吡啶(1d))和[Ir(pq)2(L2)](PF 6)(L2是2,2'-联吡啶(1e),2,2'-联嘧啶基(1f),4,4'-二甲基-2,2'-联吡啶(1g)和4,4'-二甲氧基-2,2'-联吡啶(1h))进行合成和表征。通过调节Ir的辅助配体,评估了金属基最高占据分子轨道对三重态寿命,三重态量子产率和1 O 2代量子产率以及有氧光氧化硫化物成亚砜的影响。 (pq)2个配合物。结果表明,螯合辅助配体带有给电子基团的1h具有较高的1 O 2。在温和条件下具有高的化学选择性和低的催化剂负载量(0.5 mol%)时产生的量子产率(0.90)和对硫化物氧化的光催化活性。此外,还开发了一锅两步制备对映纯亚