TY - JOUR
T1 - Nanoporous crystal 12CaO·Al2O3
T2 - A playground for studies of ultraviolet optical absorption of negative ions
AU - Hayashi, Katsuro
AU - Sushko, Peter V.
AU - Ramo, David Muñoz
AU - Shluger, Alexander L.
AU - Watauchi, Satoshi
AU - Tanaka, Isao
AU - Matsuishi, Satoru
AU - Hirano, Masahiro
AU - Hosono, Hideo
PY - 2007/3/1
Y1 - 2007/3/1
N2 - A novel nanoporous material 12CaO·Al2O3 (C12A7) offers a possibility of incorporating large concentrations (>10 21 cm-3) of a wide range of extraframework anions inside its nanopores. We have investigated, both experimentally and theoretically, optical absorption associated with several types of such anions, including F-, OH-, O-, O2-, O2 2-, and O22-, and assigned their optical absorption bands. It is demonstrated that the chemical identity and concentration of extraframework anions can be controlled by an appropriate treatment of "as grown" C12A7. We also show that the position of the adsorption edge is, in turn, determined by the chemical identity of the extraframework species and can be varied in the range of ∼4-6 eV. We suggest that C12A7 is a unique host material, which can be used as a playground for studying negatively charged species that are unstable in other environments.
AB - A novel nanoporous material 12CaO·Al2O3 (C12A7) offers a possibility of incorporating large concentrations (>10 21 cm-3) of a wide range of extraframework anions inside its nanopores. We have investigated, both experimentally and theoretically, optical absorption associated with several types of such anions, including F-, OH-, O-, O2-, O2 2-, and O22-, and assigned their optical absorption bands. It is demonstrated that the chemical identity and concentration of extraframework anions can be controlled by an appropriate treatment of "as grown" C12A7. We also show that the position of the adsorption edge is, in turn, determined by the chemical identity of the extraframework species and can be varied in the range of ∼4-6 eV. We suggest that C12A7 is a unique host material, which can be used as a playground for studying negatively charged species that are unstable in other environments.
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U2 - 10.1021/jp065793b
DO - 10.1021/jp065793b
M3 - Article
C2 - 17269815
AN - SCOPUS:33947394050
SN - 1520-6106
VL - 111
SP - 1946
EP - 1956
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
IS - 8
ER -