Luminescence of tris(2,2′-bipyridine)ruthenium(II) cations ([Ru(bpy)3]2+) adsorbed in mesoporous silicas modified with sulfonated phenethyl group

Minoru Sohmiya, Yoshiyuki Sugahara, Makoto Ogawa

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The adsorption of tris(2,2′-bipyridine)rudienium(II) ([Ru(bpy) 3]2+) complex cation into modified mesoporous silicas was investigated. In order to immobilize [Ru(bpy)3]2+, the mesopore surface was modified with sulfonic acid groups by the reactions between MCM-41 and phenethyl(dichloro)methylsilane and the subsequent sulfonation of the attached phenethyl groups with chlorosulfonic acid. The modified mesoporous silicas effectively adsorbed [Ru(bpy)3]2+ from ethanol solution. It was thought that the effective adsorption was the cause of the cooperative effects of the electrostatic interactions between [Ru(bpy) 3]2+ cation and sulfonic acid group and the interactions between the phenyl rings on the mesopore surface and the bipyridine rings of the complex. The variation of the position and the intensity of the luminescence of [Ru(bpy)3]2+ suggested that the average distance between the adjacent [Ru(bpy)3]2+ changed with the loading amounts.

Original languageEnglish
Pages (from-to)8836-8841
Number of pages6
JournalJournal of Physical Chemistry B
Volume111
Issue number30
DOIs
Publication statusPublished - 2007 Aug 2

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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