Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization
Publication type: Journal Article
Publication date: 1997-01-01
scimago Q3
wos Q4
SJR: 0.254
CiteScore: 2.0
Impact factor: 1.0
ISSN: 00084042, 14803291
DOI:
10.1139/v97-014
General Chemistry
Catalysis
Organic Chemistry
Abstract
Several compounds of the type PhCR1R2-TEMPO (where TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxide) have been prepared and examined as potential photosensitized initiators for "living" free radical polymerizations. For example, these compounds are excellent quenchers of triplet xanthone (rate constants in the range (8.0–13) × 108 M−1 s−1) and result in the formation of benzylic and TEMPO radicals. The importance of excited state energy and nature of the excited triplet state have also been explored. We also tested pyrene as a possible singlet sensitizer. While pyrene fluorescence is efficiently quenched, the process does not lead to cleavage of the C—O bond. A model is proposed to account for this anomaly in the photosensitized decomposition of these TEMPO adducts. Keywords: TEMPO, laser flash photolysis, time resolved emission spectroscopy, sensitizers, quenching, photoinitiator.
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63
Total citations:
63
Citations from 2024:
2
(3.17%)
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MLA
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GOST
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Scaiano J. et al. Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization // Canadian Journal of Chemistry. 1997. Vol. 75. No. 1. pp. 92-97.
GOST all authors (up to 50)
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Scaiano J., Connolly T. J., Mohtat N., Pliva C. N. Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization // Canadian Journal of Chemistry. 1997. Vol. 75. No. 1. pp. 92-97.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1139/v97-014
UR - https://doi.org/10.1139/v97-014
TI - Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization
T2 - Canadian Journal of Chemistry
AU - Scaiano, J.C.
AU - Connolly, Terrence J.
AU - Mohtat, Nadereh
AU - Pliva, Claudette N.
PY - 1997
DA - 1997/01/01
PB - Canadian Science Publishing
SP - 92-97
IS - 1
VL - 75
SN - 0008-4042
SN - 1480-3291
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{1997_Scaiano,
author = {J.C. Scaiano and Terrence J. Connolly and Nadereh Mohtat and Claudette N. Pliva},
title = {Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization},
journal = {Canadian Journal of Chemistry},
year = {1997},
volume = {75},
publisher = {Canadian Science Publishing},
month = {jan},
url = {https://doi.org/10.1139/v97-014},
number = {1},
pages = {92--97},
doi = {10.1139/v97-014}
}
Cite this
MLA
Copy
Scaiano, J.C., et al. “Exploratory study of the quenching of photosensitizers by initiators of free radical "living" polymerization.” Canadian Journal of Chemistry, vol. 75, no. 1, Jan. 1997, pp. 92-97. https://doi.org/10.1139/v97-014.