An Ion‐Exchangeable MOF with Reversible Dehydration and Dynamic Structural Behavior (NH4)2[Zn2(O3PCH2CH2COO)2]⋅5 H2O (BIRM‐1)

(NH4)2[Zn2(O3PCH2CH2COO)2]⋅5 H2O (BIRM‐1) is a new metal phosphonate material, synthesized through a simple hydrothermal reaction between zinc nitrate and 3‐phosphonopropionic acid, using urea and tetraethylammonium bromide as the reaction medium. In common with other metal–organic framework materia...

Full description

Saved in:
Bibliographic Details
Published in:Chemistry : a European journal 2019-11, Vol.25 (61), p.13865-13868
Main Authors: Zhao, Chao, Male, Louise, Chen, Tzu‐Yu, Barker, Joseph A., Shannon, Ian J., Anderson, Paul A.
Format: Article
Language:English
Subjects:
flexible structure
ion exchange
metal phosphonate
metal–organic frameworks
porous material
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:(NH4)2[Zn2(O3PCH2CH2COO)2]⋅5 H2O (BIRM‐1) is a new metal phosphonate material, synthesized through a simple hydrothermal reaction between zinc nitrate and 3‐phosphonopropionic acid, using urea and tetraethylammonium bromide as the reaction medium. In common with other metal–organic framework materials, BIRM‐1 has a large three‐dimensional porous structure providing potential access to a high internal surface area. Unlike most others, it has the advantage of containing ammonium cations within the pores and has the ability to undergo cation exchange. Additionally, BIRM‐1 also exhibits a reversible dehydration behavior involving an amorphization‐recrystallization cycle. The ability to undergo ion exchange and dynamic structural behavior are of interest in their own right, but also increase the range of potential applications for this material. Here the crystal structure of this new metal phosphonate and its ion exchange behavior with K+ as an exemplar are studied in detail, and its unusual structure‐reviving property reported. (NH4)2[Zn2(O3PCH2CH2COO)2]⋅5 H2O (BIRM‐1) is a new metal phosphonate material, synthesized through a simple hydrothermal reaction between zinc nitrate and 3‐phosphonopropionic acid, using urea and tetraethylammonium bromide as the reaction medium (see figure). BIRM‐1 has a large 3D porous structure; it contains ammonium cations within the pores and has the ability to undergo cation exchange. Additionally, BIRM‐1 also exhibits reversible dehydration behavior involving an amorphization–recrystallization cycle.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201903230