A novel optical oxygen sensing system based on triplet-triplet reflectance of fullerene C60-polystyrene film by time-resolved spectroscopy using diffuse reflectance laser flash photolysis

Yutaka Amao, Keisuke Asai, Ichiro Okura

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A new optical oxygen sensing system based on the triplet lifetimes of C60 in polystyrene (PS) film under different oxygen concentrations was developed by using OPO-Nd-YAG laser flash photolysis. The lifetime of the photoexcited triplet state of C60-PS film decreases with increasing oxygen concentration, indicating that the photoexcited triplet state of C60 in the PS film was quenched effectively by oxygen. A Stern-Volmer plot of C60 in PS film exhibits considerable linearity (r2 = 0.999), K(SV) is estimated to be 0.50 %-1. The quenching rate constant for the photoexcited triplet state of C60 in the PS film by oxygen, k(q), is 5.0 x 103 %-1 s-1. A highly sensitive oxygen sensor based on the photoexcited triplet state of C60 molecules by oxygen has been developed using time-resolved spectroscopy with laser flash photolysis.

Original languageEnglish
Pages (from-to)523-526
Number of pages4
JournalAnalyst
Volume125
Issue number3
DOIs
Publication statusPublished - 2000 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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