engleski

Solvent influence on the crystal packing of supramolecular copper(II) ternary coordination compounds

Water adsorption materials have been in focus as potential desiccants or, more recently, as atmospheric water harvesters [1]. Recently we showed that ternary coordination compounds of copper(II), aminoacidates and heterocyclic bases have the potential for controllable water absorption/desorption in the solid state [2]. We report syntheses and crystal structures of ternary coordination compounds of phenanthroline (phen), glycine (HGly) and copper(II): [Cu(Gly)(H2O) (phen)]2SO4∙6H2O (1a·6H2O), [Cu(Gly)(H2O)(phen)] [Cu(Gly)(SO4) (phen)]∙5H2O (1b·5H2O), {; ; [Cu(μ-Gly) (phen)]2SO4∙2H2O}; ; n (1c·2H2O), and {; ; [Cu(μ- Gly)phen)]2SO4∙3CH3OH∙2H2O}; ; n (1c·3CH3OH·2H2O). Syntheses were performed by solution-based techniques and by liquid assisted grinding. Fine tuning of the synthetic conditions influenced the copper(II) coordination and supramolecular architectures of the compounds. Four types of solvent packing were found: pockets in 1c·2H2O, 1D channels and pockets in 1b·5H2O, 1D channels in 1a·6H2O and 2D channels in 1c·3CH3OH·2H2O (Figure 1). Stability of compounds under atmosphere of water and methanol vapours was tested.

porous coordination compounds ; solvatomorphs ; copper(II) ; glycine ; crystal structures

nije evidentirano