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Anion Exchange in Coordination‐Network Materials
Author(s) -
Phuengphai Pongthipun,
Massera Chiara,
Reedijk Jan,
Youngme Sujittra,
Gamez Patrick
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300510
Subject(s) - chemistry , crystallography , infrared spectroscopy , molecule , ion , bipyridine , stereochemistry , crystal structure , organic chemistry
Six coordination polymers, namely, the three‐dimensional frameworks {[Zn 3 (4,4′‐bpy) 3.5 (μ‐O 2 CH) 4 (H 2 O) 2 ](ClO 4 ) 2 (H 2 O) 2 } n ( 1 , 4,4′‐bpy = 4,4′‐bipyridine) and {[Zn 3 (4,4′‐bpy) 3.5 (μ‐O 2 CH) 4 (H 2 O) 2 ](PF 6 ) 2 } n ( 2 ), the two‐dimensional networks {[Zn(4,4′‐bpy)(μ‐O 2 CH)(H 2 O) 2 ](CF 3 SO 3 )(H 2 O)} n ( 3 ) and {[Zn 3 (4,4′‐bpy) 4 (μ‐O 2 CCH 2 CH 3 ) 4 ](ClO 4 ) 2 (4,4′‐bpy) 2 (H 2 O) 4 } n ( 4 ), the one‐dimensional double‐stranded zigzag chain {[Zn 3 (4,4′‐bpy) 4 (μ‐O 2 CCH 2 CH 3 ) 4 (H 2 O) 2 ](PF 6 ) 2 (H 2 O) 2 } n ( 5 ), and the one‐dimensional double‐ladder chain {[Zn 2 (4,4′‐bpy) 2 (μ‐O 2 CCH 2 CH 3 ) 2 (H 2 O) 2 ](CF 3 SO 3 ) 2 } n ( 6 ), have been prepared. The solid‐state structures of the six compounds all exhibit void spaces that contain anions and neutral guest molecules, namely, water for 1 , 3 and 5 , and water/4,4′‐bpy for 4 . The anion‐exchange properties of the compounds have been investigated by monitoring the substitution of the ions by infrared spectroscopy. Furthermore, X‐ray powder diffraction studies and elemental analyses have been used to further confirm the anion exchange. The results show that the anions in all compounds can be replaced with ClO 4 – or PF 6 – for 1 , 2 , 4 , and 5 , ClO 4 – and PF 6 – for 3 , and ClO 4 – , PF 6 – , and BF 4 – for 6 . Furthermore, compound 1 shows interesting reversible anion‐exchange properties in aqueous solution.