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Int. J. Mol. Sci. 2010, 11(10), 3803-3845; doi:10.3390/ijms11103803
Review

Flexible Two-Dimensional Square-Grid Coordination Polymers: Structures and Functions

1,* , 2,3,†
,
4
 and
2
Received: 21 August 2010 / Revised: 19 September 2010 / Accepted: 20 September 2010 / Published: 30 September 2010
(This article belongs to the Special Issue Metal Organic Frameworks)

Abstract

Coordination polymers (CPs) or metal-organic frameworks (MOFs) have attracted considerable attention because of the tunable diversity of structures and functions. A 4,4'-bipyridine molecule, which is a simple, linear, exobidentate, and rigid ligand molecule, can construct two-dimensional (2D) square grid type CPs. Only the 2D-CPs with appropriate metal cations and counter anions exhibit flexibility and adsorb gas with a gate mechanism and these 2D-CPs are called elastic layer-structured metal-organic frameworks (ELMs). Such a unique property can make it possible to overcome the dilemma of strong adsorption and easy desorption, which is one of the ideal properties for practical adsorbents.
Keywords: porous coordination polymer (PCP); metal-organic framework (MOF); gas adsorption; gas separation; structural transformation; gate phenomena; elastic layer‑structure; clathrate formation porous coordination polymer (PCP); metal-organic framework (MOF); gas adsorption; gas separation; structural transformation; gate phenomena; elastic layer‑structure; clathrate formation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kajiro, H.; Kondo, A.; Kaneko, K.; Kanoh, H. Flexible Two-Dimensional Square-Grid Coordination Polymers: Structures and Functions. Int. J. Mol. Sci. 2010, 11, 3803-3845.

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