Инд. авторы:	Antonova O.V., Nadolinny V.A., Il'inchik E.A., Kovalev M.K., Yelisseyev A.P.
Заглавие:	Size-Dependent Effects in EPR and Luminescence Spectra of NH4BPh4 Excited States: From Bulk to Nanoparticles
Библ. ссылка:	Antonova O.V., Nadolinny V.A., Il'inchik 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. - Vol.40. - Iss. 4. - P.459-469. - ISSN 0937-9347. - EISSN 1613-7507.
Внешние системы:	DOI: 10.1007/s00723-011-0214-8; SCOPUS: 2-s2.0-79960714312;
Реферат:	eng: 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. © 2011 Springer-Verlag.
Ключевые слова:	Electron spin resonance spectroscopy; Paramagnetism; Paramagnetic resonance; Luminescence; Electrons; Triplet state; Thermoluminescence spectrum; Size-dependent effect; Photoexcited state; Pair formation; Mesoporous; Luminescence spectrum; EPR studies; Electron hole pairs; Electron hole; Electron capture; Different pore sizes; Bulk samples; Phenyl rings; Adsorbed oxygen;
Издано:	2011
Физ. характеристика:	с.459-469