Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations
Zhijun Chen
1
,
Dennis Oprych
2
,
Chaoming Xie
1
,
Ceren Kütahya
2
,
Si-Ming Wu
1
,
Bernd Strehmel
2
Publication type: Journal Article
Publication date: 2017-09-21
Organic Chemistry
Physical and Theoretical Chemistry
Analytical Chemistry
Abstract
Upconversion nanoparticles (UCNPs) sensitized photolytitic cleavage of the blue/UV photoinitiator bis(4-methoxybenzoyl) diethyl germanium (1). 1 initiated radical photopolymerization in combination with NaYF4:TmYb@NaYF4 UCNPs. A 974 nm NIR laser served as excitation source to generate blue and UV light. In addition, a metal free photo-ATRP system comprising (i-propyl) thioxanthone (ITX), N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMDETA) and -bromo(i-butyl) ethylester (-BrBuEt)) was used instead of 1. This resulted in a significant smaller polydispersity compared to the UCNP/1 system. Control of polymerization was successfully proved by chain extension showing control of chain termination. For the first time, we demonstrated photolytic formation of acidic cations in such NIR UCNP-systems comprising an ITX/iodonium photoinitiator for sensitized generation of acidic cations. In addition, 1 also resulted in crosslinking of 1,6-hexanediol diacrylate (HDDA) in combination with UCNP and NIR-laser excitation. UV filter materials such as TiO2 do not significantly interfere crosslinking.
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Chen Z. et al. Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations // ChemPhotoChem. 2017. Vol. 1. No. 11. pp. 499-503.
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Chen Z., Oprych D., Xie C., Kütahya C., Wu S., Strehmel B. Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations // ChemPhotoChem. 2017. Vol. 1. No. 11. pp. 499-503.
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RIS
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TY - JOUR
DO - 10.1002/cptc.201700131
UR - https://doi.org/10.1002/cptc.201700131
TI - Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations
T2 - ChemPhotoChem
AU - Chen, Zhijun
AU - Oprych, Dennis
AU - Xie, Chaoming
AU - Kütahya, Ceren
AU - Wu, Si-Ming
AU - Strehmel, Bernd
PY - 2017
DA - 2017/09/21
PB - Wiley
SP - 499-503
IS - 11
VL - 1
SN - 2367-0932
ER -
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BibTex (up to 50 authors)
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@article{2017_Chen,
author = {Zhijun Chen and Dennis Oprych and Chaoming Xie and Ceren Kütahya and Si-Ming Wu and Bernd Strehmel},
title = {Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations},
journal = {ChemPhotoChem},
year = {2017},
volume = {1},
publisher = {Wiley},
month = {sep},
url = {https://doi.org/10.1002/cptc.201700131},
number = {11},
pages = {499--503},
doi = {10.1002/cptc.201700131}
}
Cite this
MLA
Copy
Chen, Zhijun, et al. “Upconversion-Nanoparticle-Assisted Radical Polymerization at λ =974 nm and the Generation of Acidic Cations.” ChemPhotoChem, vol. 1, no. 11, Sep. 2017, pp. 499-503. https://doi.org/10.1002/cptc.201700131.