Optical oxygen pressure sensing based on triplet-triplet quenching of fullerene-polystyrene film using laser flash photolysis: Soccerballene C60 versus rugbyballene C70

Yutaka Amao, Keisuke Asai, Ichiro Okura

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16 Citations (Scopus)

Abstract

An optical oxygen-sensing system based on the triplet lifetimes of fullerenes C60 and C70 in polystyrene (PS) under different oxygen pressures was developed using laser flash photolysis. The lifetime of the photoexcited triplet state of fullerene-PS film decreases with increasing oxygen pressure. The photoexcited triplet state of fullerene-PS film was effectively quenched by oxygen. The quenching rate constant of the photoexcited triplet state of C60 and C70 in PS film by oxygen, k(q), were estimated to be 6.6x 102 and 1.4 x 103 Torr-1 s-1, respectively (1 Torr = 133.322 Pa). The linearity of a Stern-Volmer plot of C60-PS film (r2 = 0.999) is superior to that of C70-PS film (r2 = 0.992). These results show that C60- and C70-PS films are highly sensitive for oxygen in the total oxygen pressure region and in the low oxygen pressure region, respectively.

Original languageEnglish
Pages (from-to)2223-2227
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume72
Issue number10
DOIs
Publication statusPublished - 1999 Oct 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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