Photophysical and optical oxygen sensing properties of tris(bipyridine)ruthenium(II) in ionic liquid modified sol-gel matrix

ÖTER Ö., ERTEKİN K., Derinkuyu S.

MATERIALS CHEMISTRY AND PHYSICS, cilt.113, sa.1, ss.322-328, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 113 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.matchemphys.2008.07.100
  • Dergi Adı: MATERIALS CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.322-328
  • Anahtar Kelimeler: O-2 sensing, Optical sensors, Sol-gel, Ionic liquids, Ruthenium dyes, METAL-COMPLEXES, THIN-FILMS, POROSITY
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Photophysical characteristics and emission based response of tris(2,2'-bipyridyl)ruthenium(II)chloride (Ru(bipy)(3)(2+)) to gaseous oxygen was investigated in ionic liquid modified sol-gel matrix. The ionic liquid; 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) was used for the first time in acid-catalyzed tetraethyl orthosilicate (TEOS) based sol-gel matrix. Effects of the ionic liquid to the oxygen sensitivity and to surface characteristics were examined. EMIMBF4 doped sol-gel slides exhibited enhanced O-2 sensitivity, larger Stern-Volmer constants, linear Stern-Volmer plots with respect to classical acid catalyzed sol-gel monoliths and completely crack-free surfaces. The utilization of EMIMBF4 in sol-gel matrix also caused a red shift of 23 nm in the emission wavelength and an enhanced Stoke's shift value of (Ru(bipy)(3)(2+)) with respect to ionic liquid free sol-gel composites. The response and regeneration times were 5 and 10 s after exposure to 100% O-2 and 100% N-2, respectively. The offered composite is only available for gas phase measurements. (C) 2008 Elsevier B.V. All rights reserved.