Sol-gel synthesis of low-dimensional silica within coordination nanochannels.
Sol-gel condensation of tetramethoxysilane (TMOS) inside the channels of a coordination pillared layer structure [Cu2(pzdc)2(dpe)]n (1a; pzdc = pyrazine-2,3-dicarboxylate, dpe = 1,2-di(4-pyridyl)ethylene) produced subnanosized silica dispersed within the host framework. In this system, the growth of silica is effectively constrained, and the resultant silica shows a drastic decrease of its crystallization temperature because of its minute size.
Uemura
Takashi
T
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Hiramatsu
Daisuke
D
Yoshida
Kaname
K
Isoda
Seiji
S
Kitagawa
Susumu
S