Size Effects in Photoexcitation of Triplet States of Ammonium Tetraphenylborate
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Physics of the Solid State
ISSN: 1063-7834
, E-ISSN: 1090-6460
|
| Вых. Данные |
Год: 2011,
Том: 53,
Номер: 2,
Страницы: 284-291
Страниц
: 8
DOI:
10.1134/S106378341102020X
|
| Авторы |
Nadolinny V.A.
1
,
Antonova O.V.
1
,
Ilʹinchik E.A.
1
,
Kovalev M.K.
2
,
Melʹgunov M.S.
2
,
Yelisseev A.P.
3
,
Ryadun A.A.
1
|
| Организации |
| 1 |
Институт неорганической химии им. А.В. Николаева СО РАН
|
| 2 |
Институт катализа им. Г.К. Борескова СО РАН
|
| 3 |
Институт геологии и минералогии им. В.С. Соболева СО РАН
|
|
Информация о финансировании (1)
This paper reports on the results of complex investigations of photoexcited states of ammonium
tetraphenylborate, which are characterized by selfsensitized luminescence. It has been established that the
excitation by UV light at 77 K leads to the formation of stable triplet states due to the capture of electrons on
electron traps. The EPR and luminescence excitation spectra exhibit the formation of a set of triplet states
with different distances between electrons and holes. The performed investigations give grounds to affirm
that, in bulk samples, cations in the structure of ammonium tetraphenylborate are electron traps. When the
size of the ammonium tetraphenylborate sample is changed to 6 and 3 nm, the capture of excited electrons
on sorbed oxygen molecules becomes dominant. In this case, the appearance of the spectrum of anion
radicals has been detected by the EPR method. The proposed interpretation of the observed effects has been
confirmed by the thermoluminescence data on the recombination of electron–hole pairs, which correlate
with a change in the intensity of the EPR spectra during annealing.