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Crystals 2014, 4(1), 42-52; doi:10.3390/cryst4010042

Structural Variation in Polyoxomolybdate Hybrid Crystals Comprising Ionic-Liquid Surfactants

1
Department of Chemistry, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka 259-1292, Japan
2
Research Laboratory, Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima 196-8666, Japan
3
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-23, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
*
Author to whom correspondence should be addressed.
Received: 10 January 2014 / Revised: 11 February 2014 / Accepted: 20 February 2014 / Published: 4 March 2014
(This article belongs to the Special Issue Crystal Engineering Involving Weak Bonds)
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Abstract

Polyoxomolybdate inorganic-organic hybrid crystals were synthesized with 1-decyl-3-methylimidazolium and 1-dodecyl-3-methylimidazolium as ionic-liquid surfactants. Both hybrid crystals possessed alternate stacking of surfactant layers and octamolybdate (Mo8) monolayers, while the molecular structures of Mo8 were different depending on the surfactants and solvents employed for crystallization. Each Mo8 anion was connected by two sodium cations to form infinite one-dimensional chain. The surfactant chains in these crystals were arranged in a complicatedly bent manner, which will be induced by the weak C–H···O hydrogen bonds between the Mo8 anions and ionic-liquid surfactants.
Keywords: inorganic-organic; layered crystal; polyoxometalate; ionic-liquid; surfactant inorganic-organic; layered crystal; polyoxometalate; ionic-liquid; surfactant
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Ito, T.; Mikurube, K.; Hasegawa, K.; Matsumoto, T.; Kosaka, K.; Naruke, H.; Koguchi, S. Structural Variation in Polyoxomolybdate Hybrid Crystals Comprising Ionic-Liquid Surfactants. Crystals 2014, 4, 42-52.

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