Fast Interchange of Coordinated and Guest Dimethylformamide Molecules in the Zinc(II) Lactate Terephthalate Metal鈥揙rganic Framework

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• 作者：Marsel R. Gallyamov ; Danil N. Dybtsev ; Denis P. Pischur ; Svetlana G. Kozlova ; Nikolai K. Moroz ; Vladimir P. Fedin
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：November 5, 2015
• 年：2015
• 卷：119
• 期：44
• 页码：24769-24773
• 全文大小：272K
• ISSN：1932-7455

文摘

Mobility of N,N-dimethylformamide (dmf) molecules in a homochiral metal鈥搊rganic framework [Zn₂(bdc)(S-lac)(dmf)]路dmf (bdc = 1,4-benzenedicarboxylate; S-lac = L-(鈭?-lactate) has been studied using p>13p>C, p>1p>H, and p>2p>H solid-state NMR and DSC experiments. The compound exhibits a phase transition in the vicinity of 240 K, associated with disordering of the dmf molecules. In the high-temperature phase, the dmf molecules undergo intense diffusion accompanied by the exchange between the molecules coordinated with Zn and guest molecules in the framework pores. The activation energy of the molecular migration including exchange between coordinated and guest molecules was estimated to be 37 kJ/mol.