TY - JOUR
T1 - Optical oxygen pressure sensing based on triplet-triplet quenching of fullerene-polystyrene film using laser flash photolysis
T2 - Soccerballene C60 versus rugbyballene C70
AU - Amao, Yutaka
AU - Asai, Keisuke
AU - Okura, Ichiro
PY - 1999/10/1
Y1 - 1999/10/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032753692&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032753692&partnerID=8YFLogxK
U2 - 10.1246/bcsj.72.2223
DO - 10.1246/bcsj.72.2223
M3 - Article
AN - SCOPUS:0032753692
VL - 72
SP - 2223
EP - 2227
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 10
ER -