Squarilium dyes, their infrared and resonance Raman spectra and possible use in redox reactions for solar-energy conversion
作者:Martin Forster、Ronald E. Hester
DOI:10.1039/f19827801847
日期:——
Infrared and resonanceRamanspectra of squariliumdyes I–VI of the type [graphic omitted] are presented and some vibrational modes of the central 4-membered ring are assigned. Methyl viologen dication (MV2+) is reduced photocatalytically by IV in DMSO + H2O (95/5, v/v) with a quantum yield ϕ of (1.8 ± 0.4)× 10–3 at 406.7 nm, if EDTA is present. Oxidation products of MV2+ behave similarly with ϕ=(4
给出了[图形省略]类型的方形染料I–VI的红外和共振拉曼光谱,并指定了中心4元环的某些振动模式。甲基紫精二价阳离子(MV 2+)的光催化由IV在DMSO + H减少2 O(95/5,体积/体积)与量子收率φ的(1.8±0.4)×10 -3在406.7纳米,如果EDTA是展示。在DMF + H 2 O(2/1,v / v)中,MV 2+的氧化产物在457.9 nm处具有ϕ =(4.7±0.6)×10 –2的相似行为。IV ˙+似乎氧化^ h 2 Ø近可逆。