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Selective Rb + vs. K + Guest Incorporation in Wheel‐Shaped 27‐Tungsto‐3‐Arsenate(III) Host, [M⊂{(β‐As III W 8 O 30 )(WO(H 2 O))} 3 ] 14– (M = K, Rb)
Author(s) -
Kandasamy Balamurugan,
Sudmeier Tim,
Ayass Wassim W.,
Lin Zhengguo,
Feng Qianyu,
Bassil Bassem S.,
Kortz Ulrich
Publication year - 2019
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.201800788
Subject(s) - chemistry , rubidium , arsenate , ion , aqueous solution , crystallography , selectivity , inorganic chemistry , potassium , alkali metal , single crystal , crystal structure , nuclear chemistry , arsenic , organic chemistry , catalysis
The wheel‐shaped, potassium‐templated 27‐tungsto‐3‐arsenate(III) [K⊂{(β‐As III W 8 O 30 )(WO(H 2 O))} 3 ] 14– ( 1 ) was synthesized by simple one‐pot condensation of the trilacunary [ B ‐α‐As III W 9 O 33 ] 9– precursor in aqueous, acidic KCl solution. Polyanion 1 comprises three β‐{AsW 8 O 30 } units linked via three trans ‐{WO(H 2 O)} groups, forming a cyclic assembly with a potassium ion located in the central cavity. The rubidium‐analogue [Rb⊂{(β‐As III W 8 O 30 )(WO(H 2 O))} 3 ] 14– ( 2 ) could also be prepared, by addition of a small amount of Rb + ions to a solution containing a large excess of K + ions. This indicates that the rigid [{(β‐As III W 8 O 30 )(WO(H 2 O))} 3 ] 15– (As 3 W 27 ) host exhibits high selectivity for Rb + ion guests compared to K + ions. Polyanions 1 and 2 were characterized in the solid state by single‐crystal XRD, FT‐IR, TGA, and elemental analysis.