Multiple-Step Humidity-Induced Single-Crystal to Single-Crystal Transformations of a Cobalt Phosphonate: Structural and Proton Conductivity Studies

详细信息    查看全文

• 作者：Zhong-Sheng Cai ; Song-Song Bao ; Xi-Zhang Wang ; Zheng Hu ; Li-Min Zheng
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：April 4, 2016
• 年：2016
• 卷：55
• 期：7
• 页码：3706-3712
• 全文大小：509K
• ISSN：1520-510X

文摘

Humidity-induced multiple-step single-crystal to single-crystal (SC-SC) transformations are observed in the cobalt phosphonate (NH₄)₃[Co₂(bamdpH)₂(HCOO)(H₂O)₂] (1), where bamdpH₄ is (benzylazanediyl)bis(methylene)diphosphonic acid, [C₆H₅CH₂N(CH₂PO₃H₂)₂]. Under high-humidity conditions (95% RH), compound 1 experiences hydrolysis at 60 °C which is accompanied by the transformation from a double-chain structure of compound 1 into a single-chain structure of [Co(bamdpH₂)(H₂O)₂]·2H₂O (2). When the humidity is below 10% RH, part of the lattice water in compound 2 can be released, forming a third phase, [Co(bamdpH₂)(H₂O)₂]·H₂O (3). The structural transformation processes have been monitored by infrared and proton conductivity measurements.