Issue 32, 2014

Uniaxial negative thermal expansion facilitated by weak host–guest interactions

Abstract

A nitromethane solvate of 18-crown-6 was investigated by means of variable-temperature single-crystal X-ray diffraction in response to a report of abnormal unit cell contraction. Exceptionally large positive thermal expansion in two axial directions and negative thermal expansion along the third was confirmed. The underlying mechanism relies exclusively on weak electrostatic interactions to yield a linear thermal expansion coefficient of −129 × 10−6 K−1, the largest negative value yet observed for an organic inclusion compound.

Graphical abstract: Uniaxial negative thermal expansion facilitated by weak host–guest interactions

Supplementary files

Article information

Article type
Communication
Submitted
31 Jan 2014
Accepted
04 Mar 2014
First published
05 Mar 2014
This article is Open Access
Creative Commons BY license

Chem. Commun., 2014,50, 4238-4241

Author version available

Uniaxial negative thermal expansion facilitated by weak host–guest interactions

E. R. Engel, V. J. Smith, C. X. Bezuidenhout and L. J. Barbour, Chem. Commun., 2014, 50, 4238 DOI: 10.1039/C4CC00849A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements