Alignment of Acentric Units in Infinite Chains: A 鈥淟ock and Key鈥?Model

详细信息    查看全文

• 作者：Romain Gautier ; Kenneth R. Poeppelmeier
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：September 4, 2013
• 年：2013
• 卷：13
• 期：9
• 页码：4084-4091
• 全文大小：437K
• 年卷期：v.13,no.9(September 4, 2013)
• ISSN：1528-7505

文摘

Polar chains built from acentric building units are of importance to investigate the mechanisms driving the polar alignment in the solid state. Our attempts to engineer polar chains in mixed metal oxide fluorides M鈥?2,2鈥?bpy)(H₂O)₂MO_xF_6鈥?i>x compounds [M鈥?M = Cu/Ti, Cu/V, Cu/Nb, Cu/Mo, Zn/Mo, and Zn/W] were successful using a combination of acentric anions [MO_xF_6鈥?i>x]^{2鈥?/sup> and acentric cations [M鈥?2,2鈥?bpy)(H₂O)₂]2+. A new general insight is also revealed: the alignment of polar units can be described with a 鈥渓ock and key鈥?model. The role of both the key (the acentric unit) and the lock (its environment) on the polarity in infinite chains is discussed.}