Back to articles
Articles
Volume: 17 | Article ID: art00052_1
Image
Spectroscopic Determination of Very Low Quantum Yield of Singlet Oxygen Formation Photosensitized by Dyes and Pigments
Shoichi Yamaguchi
Kimiya Takeshita
Yutaka Sasaki
Yukichi Murata
Tetsuo Murayama
  DOI :  10.2352/ISSN.2169-4451.2001.17.1.art00052_1  Published Online :  January 2001
Abstract

We have measured the quantum yield QΔ of 1Δg molecular oxygen (singlet oxygen, 1O2) formation photosensitized by some dyes for industrial uses, because the photofading processes of dyes are usually triggered by 1O2. QΔ for industrial dyes, however, is generally very low, and it has been difficult to determine accurately QΔ for them. We have made a highly sensitive spectrometer for 1.27-μm 1O2 phosphorescence detection, and determined QΔ for an azo dye as low as (2.2 ± 1.5) × 10−5. This is the first demonstration of QΔ lower than 10−4 as far as we know. Relationship between QΔ and the lightfastness of practical dyes is also discussed in this study.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
Subject Areas :
Views 12
Downloads 0
 DOI 10.2352/ISSN.2169-4451.2001.17.1.art00052_1
 articleview.views 12
 articleview.downloads 0
  Cite this article 

Shoichi Yamaguchi, Kimiya Takeshita, Yutaka Sasaki, Yukichi Murata, Tetsuo Murayama, "Spectroscopic Determination of Very Low Quantum Yield of Singlet Oxygen Formation Photosensitized by Dyes and Pigments"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP17),  2001,  pp 244 - 249,  https://doi.org/10.2352/ISSN.2169-4451.2001.17.1.art00052_1

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2001
72010410
NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20010101)2001:1L.244;1-
nip_v2001n1/splitsection52.xml
/ist/nipdf/2001/00002001/00000001/art00052
Articles
Spectroscopic Determination of Very Low Quantum Yield of Singlet Oxygen Formation Photosensitized by Dyes and Pigments
YamaguchiShoichi
TakeshitaKimiya
SasakiYutaka
MurataYukichi
MurayamaTetsuo
01012001
2001
1
244
249
2001
We have measured the quantum yield QΔ of 1Δg molecular oxygen (singlet oxygen, 1O2) formation photosensitized by some dyes for industrial uses, because the photofading processes of dyes are usually triggered by 1O2. QΔ for industrial dyes, however, is generally very low, and it has been difficult to determine accurately QΔ for them. We have made a highly sensitive spectrometer for 1.27-μm 1O2 phosphorescence detection, and determined QΔ for an azo dye as low as (2.2 ± 1.5) × 10−5. This is the first demonstration of QΔ lower than 10−4 as far as we know. Relationship between QΔ and the lightfastness of practical dyes is also discussed in this study.