Journal
CRYSTENGCOMM
Volume 18, Issue 23, Pages 4349-4358Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ce00155f
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Funding
- Korea CCS R&D Center (KCRC) grant - Korean government (Ministry of Science, ICT & Future Planning (MSIP)) [NRF-2014M1A8A1049253]
- Basic Science Research Program [NRF-2015R1A2A1A10055658]
- Priority Research Centers Program [NRF-20100020209]
- Korea University Grant
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Four Zn(II) coordination compounds (1-4) were prepared solvothermally by reacting Zn2+ ions and organic linkers of dim and carboxylic acid-based ligands. Two-dimensional structures (1 and 2), which are extended to three-dimensional frameworks with the assistance of multiple hydrogen bonding interactions, are formed by employing isophthalate-based organic ligands. 4-fold (3) and 3-fold (4) interpenetrations occur when organic linkers that have carboxylic acid groups located oppositely are used. Interestingly, the interpenetrating nets undergo phase transformation via two pathways involving solvent exchange/resolvation and solvent exchange/activation/resolvation, which reveals that the structures are flexible. Photoluminescence properties show the selective fluorescence quenching of 3 and 4 in nitrobenzene (NB) among the tested solvents. Such quenching is substantial even at low NB concentrations, which is associated with the existence of Lewis basic sites in the interpenetrating framework.
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