A polymerized ionic liquid-supported B12 catalyst with a ruthenium trisbipyridine photosensitizer for photocatalytic dechlorination in ionic liquids

Wei Zhang, Hisashi Shimakoshi, Noriyuki Houfuku, Xi Ming Song, Yoshio Hisaeda

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

By immobilizing a B12 complex and a Ru(ii) trisbipyridine photosensitizer in a polymerized ionic liquid (PIL), a visible light-driven photocatalyst was developed. The synthesized copolymer was characterized by GPC and DLS, and using UV-vis absorption spectra and luminescence spectra. The Ru(ii) trisbipyridine photosensitizer in the copolymer showed an enhanced emission compared to that of the monomer in the ionic liquid, 1-butyl-4-methylimidazolium bis(trifluoromethanesulfonyl)amide ([C 4mim][NTf2]). Formation of the Co(i) species of the B 12 complex in the copolymer was confirmed by the UV-vis spectral change in [C4mim][NTf2] containing a sacrificial reductant (triethanolamine) under irradiation with visible light. The copolymer showed a high photocatalytic activity in various ionic liquids for 1,1-bis(4- chlorophenyl)-2,2,2-trichloroethane (DDT) dechlorination with ∼99% conversion after visible light irradiation for 2 h. Furthermore, both the B 12 catalyst and photosensitizer in the polymer were easily recycled for use with the ionic liquid solvent without any loss of catalytic activity.

Original languageEnglish
Pages (from-to)13972-13978
Number of pages7
JournalDalton Transactions
Volume43
Issue number37
DOIs
Publication statusPublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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