文章信息/Info

Title:

Abnormal Thermal Expansion in Metal-Organic Frameworks

作者:

劉占寧; 陳駿; 鄧金俠; 邢獻然

北京科技大學物理化學系

Author(s):

Liu Zhanning; Chen Jun; Deng Jinxia; Xing Xianran

Department of Physical Chemistry, University of Science and Technology Beijing

關鍵詞:

負熱膨脹性能' target="_blank" rel="external"> FONT-FAMILY: 宋體">負熱膨脹性能; 金屬有機骨架結構; 橫向振動

DOI:

10.7502/j.issn.1674-3962.2015.07.02

文獻標志碼:

A

摘要:

框架結構材料因其特有的原子排列方式往往呈現出特殊的性質，其中一些物質表現出負熱膨脹性能（NTE），如ZrW2O8，ZrMo2O8等、沸石和普魯士藍結構由于其特有的骨架構型，表現出負熱膨脹性，即體積隨溫度的升高而收縮。近年來，以配位化學為基礎發展起來的金屬有機骨架結構的材料正迅猛發展，新的結構不斷被發現。其中不乏一些物質表現出反常的熱膨脹性，如IRMOFs、HKUST-1、MIL-53等均表現出負熱膨脹性，而一些物質具有反常的巨大的負熱膨脹系數，如Ag3Co(CN)6。金屬有機框結構的負熱膨脹性往往起源于骨架中橋連原子垂直于連接方向的橫向振動，而金屬有機骨架的熱膨脹性能往往還涉及到配體的柔性帶來的影響以及變溫過程中配體的轉動等行為。本文就金屬有機骨架結構的反常熱膨脹性近年取得的一些研究進展和展望作了簡要綜述，以期更多的學者對這一領域產生興趣。

Abstract:

Some framework materials show unique properties due to their special atomic arrangement，among them some show abnormal thermal expansion，for example ZrW2O8，ZrMo2O8，et al，zeolite and Prussian blue analogues show negative thermal expansion(volume contract with increasing temperature).Recently, researches about metal-organic frameworks based on coordination chemistry developed rapidly，numerous structure have been found. Some metal-organic frameworks show abnormal thermal expansion, for example, IRMOFs、HKUST-1、MIL-53 show negative thermal expansion, while some MOFs show colossal thermal expansion, such as Ag3Co(CN)6. Most framework materials show negative thermal expansion due to the transverse vibration of the bridging atoms, while, as for MOFs, the flexibility and the rotation of ligands also contribute to thermal expansion properties. This paper is mainly concerning abnormal thermal expansion properties of MOFs to inspire more researchers’ interest.