Three cationic silver(I) coordination polymers, namely [Ag2(μ-bib)3](SO3CF3)2·(CH3CN)n (1), [Ag(μ-bib)](NO3)·(H2O)n (2), and [Ag(μ-bib)]BF4n (3), have been prepared using flexible bis(imidazolyl)butane (bib) ligand and silver salts of different anions. All compounds are characterized by FT-IR, PXRD, elemental analysis, and single-crystal X-ray diffraction. Compound 1, containing triflate (SO3CF3−) anions, exhibits a two dimensional 63-hcb network with an amazing ABCDEF packing mode of the single hexagonal layers. Compound 2, containing nitrate ions, forms a simple one dimensional wavy chain, while compound 3 with BF4− anions, shows a double helix DNA-shaped structure stabilized by Ag⋯Ag interactions between the two strands. The anions in the structures 1–3 are non-coordinating and participate in weak H-bonding, while imidazolyl rings are involved in π⋯π stacking interactions. Anion exchange experiments in aqueous solution, monitored by FT-IR and PXRD analyses, reveal interesting structural transformations.

Anion-directed assembly of three cationic silver(I) coordination polymers with bis(imidazolyl)-based linker: Structural characterization and anion exchange study / S. Azizzadeh, V. Nobakht, L. Carlucci, D.M. Proserpio. - In: POLYHEDRON. - ISSN 0277-5387. - 175(2020 Jan 01), pp. 114236.1-114236.8.

Anion-directed assembly of three cationic silver(I) coordination polymers with bis(imidazolyl)-based linker: Structural characterization and anion exchange study

L. Carlucci
Penultimo
;
D.M. Proserpio
Ultimo
2020

Abstract

Three cationic silver(I) coordination polymers, namely [Ag2(μ-bib)3](SO3CF3)2·(CH3CN)n (1), [Ag(μ-bib)](NO3)·(H2O)n (2), and [Ag(μ-bib)]BF4n (3), have been prepared using flexible bis(imidazolyl)butane (bib) ligand and silver salts of different anions. All compounds are characterized by FT-IR, PXRD, elemental analysis, and single-crystal X-ray diffraction. Compound 1, containing triflate (SO3CF3−) anions, exhibits a two dimensional 63-hcb network with an amazing ABCDEF packing mode of the single hexagonal layers. Compound 2, containing nitrate ions, forms a simple one dimensional wavy chain, while compound 3 with BF4− anions, shows a double helix DNA-shaped structure stabilized by Ag⋯Ag interactions between the two strands. The anions in the structures 1–3 are non-coordinating and participate in weak H-bonding, while imidazolyl rings are involved in π⋯π stacking interactions. Anion exchange experiments in aqueous solution, monitored by FT-IR and PXRD analyses, reveal interesting structural transformations.
Anion effect; Anion exchange; Coordination polymer; Silver(I); Structural transformation
Settore CHIM/03 - Chimica Generale e Inorganica
   PIANO DI SOSTEGNO ALLA RICERCA 2015-2017 - TRANSITION GRANT LINEA 1A PROGETTO "UNIMI PARTENARIATI H2020"
   UNIVERSITA' DEGLI STUDI DI MILANO
1-gen-2020
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/699098
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