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The Variety of Carbon-Metal Bonds inside Cu-ZSM-5 Zeolites: A Density Functional Theory Study
Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
Department of Fundamental Material Science, Division of Molecular and Material Science, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Kita-ku, Okayama 700-8530, Japan
* Author to whom correspondence should be addressed.
Received: 31 January 2010; in revised form: 29 March 2010 / Accepted: 1 April 2010 / Published: 5 April 2010
Abstract: Large-scale density functional theory calculations (DFT) found various types of binding of an unsaturated hydrocarbon (C2H2 and C2H4) to a ZSM-5 zeolite extraframework copper cation. We employed the DFT calculations based on the B3LYP functional to obtain local minima of an unsaturated hydrocarbon adsorbed on one or two copper cations embedded inside ZSM-5, and then compared their stabilization energies. The DFT results show that the stabilization energies are strongly dependent on the copper coordination environment as well as configurations of two copper cations. Consequently, the inner copper-carbon bonds are influenced substantially by a nanometer-scale cavity of ZSM-5.
Keywords: density functional theory calculation; orbital interactions; molecular symmetry; vibration; copper; the restricted environment of a zeolite host
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Yumura, T.; Hasegawa, S.; Itadani, A.; Kobayashi, H.; Kuroda, Y. The Variety of Carbon-Metal Bonds inside Cu-ZSM-5 Zeolites: A Density Functional Theory Study. Materials 2010, 3, 2516-2535.
Yumura T, Hasegawa S, Itadani A, Kobayashi H, Kuroda Y. The Variety of Carbon-Metal Bonds inside Cu-ZSM-5 Zeolites: A Density Functional Theory Study. Materials. 2010; 3(4):2516-2535.
Yumura, Takashi; Hasegawa, Saki; Itadani, Atsushi; Kobayashi, Hisayoshi; Kuroda, Yasushige. 2010. "The Variety of Carbon-Metal Bonds inside Cu-ZSM-5 Zeolites: A Density Functional Theory Study." Materials 3, no. 4: 2516-2535.