1. Synthesis, structure and properties of coordination polymers formed from bridging 4-hydroxybenzoic acid anions.
- Author
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Abrahams, Brendan F., Commons, Christopher J., Dharma, A. David, Hudson, Timothy A., Robson, Richard, Sanchez Arlt, Robin W., Stewart, Thomas C., and White, Keith F.
- Subjects
COORDINATION polymers ,PHASE transitions ,ANIONS ,HYDROXYBENZOIC acid - Abstract
The combination of 4-hydroxybenzoic acid (H
2 hba) with Li+ , Mg2+ and Cu2+ yields coordination polymers in which metal centres are bridged by an anion of the acid, either Hhba− or hba2− . In the case of Li+ , a 3D network of composition Li2 (hba)DMF was isolated in which parallel channels are occupied by coordinated DMF molecules. Mg2+ combines with H2 hba to form a 2D square grid network with the formula Mg(Hhba)2 (H2 O)2 . The alignment of parallel sheets results in the formation of channels filled with 1,4-dioxane molecules that hydrogen bond to coordinated water molecules. The compound Cu3 (hba)2 (OH)2 (1,4-dioxane)1.5 ·0.5(1,4-dioxane) is a complex 3D network formed from the combination of Cu2+ with H2 hba under basic conditions. The crystal structure determination reveals bridging 1,4-dioxane molecules. A reversible phase change occurs in the temperature range 200–220 K. The investigation highlights the key role of the solvent molecules in the structures of this series of compounds. [ABSTRACT FROM AUTHOR]- Published
- 2022
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