作者
Sebastian Henke, Andreas Schneemann, Roland A Fischer
发表日期
2013/12/23
期刊
Advanced Functional Materials
卷号
23
期号
48
页码范围
5990-5996
出版商
WILEY‐VCH Verlag
简介
Functionalized metal–organic frameworks (fu‐MOFs) of general formula [Zn2(fu‐L)2dabco]n show unprecedentedly large uniaxial positive and negative thermal expansion (fu‐L = alkoxy functionalized 1,4‐benzenedicarboxylate, dabco = 1,4‐diazabicyclo[2.2.2]octane). The magnitude of the volumetric thermal expansion is more comparable to property of liquid water rather than any crystalline solid‐state material. The alkoxy side chains of fu‐L are connected to the framework skeleton but nevertheless exhibit large conformational flexibility. Thermally induced motion of these side chains induces extremely large anisotropic framework expansion and eventually triggers reversible solid state phase transitions to drastically expanded structures. The thermo‐responsive properties of these hybrid solid–liquid materials are precisely controlled by the choice and combination of fu‐Ls and depend on functional moieties and …
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S Henke, A Schneemann, RA Fischer - Advanced Functional Materials, 2013