Ratiometric sensing of CO2 in ionic liquid modified ethyl cellulose matrix

ÖTER Ö., ERTEKİN K., Derinkuyu S.

TALANTA, vol.76, no.3, pp.557-563, 2008 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1016/j.talanta.2008.03.047
  • Journal Name: TALANTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.557-563
  • Keywords: CO2 sensing, optic sensor, HPTS, ionic liquid, EMIMBF4, PRESSURE PHASE-BEHAVIOR, CARBON-DIOXIDE SENSOR, PH, SOLUBILITY, MICROSENSOR
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this study emission-based ratiometric response of ion pair form of 1-hydroxy-3,6,8-pyrenetrisulfonate (HPTS) to gaseous CO2 has been evaluated in ionic liquid (IL) containing ethyl cellulose (EC) matrix. The ionic liquid: 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4); provided longer storage time and highly stable microenvironment for the HPTS molecule due to the buffering effect. The utilization of ionic liquid in ethyl cellulose matrix resulted with superior spectral characteristics. The excitation spectra of HPTS exhibited an atypical isoemmissive point in modified EC matrix at 418 rim which allows ratiometric processing of the signal intensities.