Size-Dependent Effects in EPR and Luminescence Spectra of NH4BPh4 Excited States: From Bulk to Nanoparticles Full article
Journal |
Applied Magnetic Resonance
ISSN: 0937-9347 , E-ISSN: 1613-7507 |
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Output data | Year: 2011, Volume: 40, Number: 4, Pages: 459-469 Pages count : 11 DOI: 10.1007/s00723-011-0214-8 | ||||||
Tags | TETRAPHENYLBORATE; CATIONS; IONS; DYES | ||||||
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Affiliations |
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Funding (1)
1 | Президиум РАН | 5 |
Abstract:
Photoexcited states of NH4BPh4 (TPhBA) particles embedded in mesoporous frameworks of different pore sizes were studied by combined electron paramagnetic resonance (EPR), optical and photoluminescence techniques. A distribution of triplet states with short and long electron–hole distances was found. While EPR studies on TPhBA bulk sample suggested that the formation of electron–hole pairs upon the excitation was caused by electron capture on electron traps, the samples in mesoporous frameworks exhibit two ways of the pair formation. The first one is attributed to the capture on phenyl rings and another one is to be thought as the capture of electrons on adsorbed oxygen molecules. These results are also consistent with the thermoluminescence spectra and EPR studies of the photoexcited samples during annealing.
Cite:
Antonova O.V.
, Nadolinny V.A.
, Ilʹinchik E.A.
, Kovalev M.K.
, Yelisseyev A.P.
Size-Dependent Effects in EPR and Luminescence Spectra of NH4BPh4 Excited States: From Bulk to Nanoparticles
Applied Magnetic Resonance. 2011. V.40. N4. P.459-469. DOI: 10.1007/s00723-011-0214-8 WOS Scopus РИНЦ
Size-Dependent Effects in EPR and Luminescence Spectra of NH4BPh4 Excited States: From Bulk to Nanoparticles
Applied Magnetic Resonance. 2011. V.40. N4. P.459-469. DOI: 10.1007/s00723-011-0214-8 WOS Scopus РИНЦ
Dates:
Submitted: | Dec 1, 2010 |
Accepted: | Jan 28, 2011 |
Published online: | Mar 25, 2011 |
Published print: | Aug 1, 2011 |
Identifiers:
Web of science | WOS:000293167000006 |
Scopus | 2-s2.0-79960714312 |
Elibrary | 16998618 |
Chemical Abstracts | 2011:952897 |
Chemical Abstracts (print) | 156:678858 |
OpenAlex | W2019615174 |