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Fluorescent Properties of three Zinc(II) Coordination Polymers derived from Flexible N ‐(4/3‐Carboxyphenyl)iminodiacetic Acids
Author(s) -
Chai XiaoChuan,
Zhao YanFei,
Gong QiaoJuan,
Liang YongPing,
Zhang HanHui,
Chen YiPing
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100433
Subject(s) - iminodiacetic acid , stacking , crystallography , fluorescence , hydrogen bond , supramolecular chemistry , zinc , dimer , chemistry , polymer , zigzag , crystal structure , materials science , molecule , inorganic chemistry , chelation , organic chemistry , physics , quantum mechanics , geometry , mathematics
Three polymers [Zn 2 ( p ‐CPIDA)(OH)] n ( 1 ), [Zn 2 ( p ‐HCPIDA) 2 (bipy)(H 2 O) 4 ] · 2H 2 O ( 2 ), and [Zn( m ‐HCPIDA)(bipy)] n ( 3 ) [ p / m ‐H 3 CPIDA = N ‐(4/3‐carboxyphenyl) iminodiacetic acid, bipy = 4, 4′‐bipyridine] were hydrothermally synthesized and characterized by single‐crystal X‐ray diffraction, X‐ray powder diffraction patterns (XPRD), FTIR spectroscopy, and fluorescence analyses. Compound 1 displays an interesting three‐dimensional framework consisting of novel paddle wheel Zn 8 O 10 C 2 units, which are further linked by p ‐CPIDA 3– ligands with versatile coordination modes. In 2 , the structural motifs formed by terminal p ‐HCPIDA 2– ligands and Zn II ions are bridged by ancillary bipy to give a zero‐dimensional Z‐shaped dimer. Compound 3 has an infinite zigzag chain linked by bipy, in which terminal m ‐HCPIDA 2– ligands alternately run along the chain like flags. Compounds 2 and 3 are further connected by hydrogen bonding and π ··· π stacking interactions to result in 3D supramolecular frameworks. Moreover, compounds 1 – 3 exhibit intense solid state fluorescent emissions at room temperature.