Crystal structures and fluorescent properties of two linear trinuclear zinc(II) complexes

• Published in: Journal of molecular structure 2007-10, Vol.842 (1), p.75-80
• Main Authors: Wang, Xian-Wen, Chen, Fu-Ping, Chen, Liang, Chen, Jing-Zhong, Jiang, Wen-Jun, Cai, Tie-Jun, Deng, Qian
• Format: Article
• Language: English
• Subjects: Cinnamate; Crystal structures; Fluorescent properties; Linear trinuclear cluster; Zinc(II) complexes
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2006.12.017

Two trinuclear zinc(II) complexes, [Zn 3(PhCH CHCO 2) 6 (L) 2] H 2O (L = 2,2′-bipyridine for 1 and 1,10-phenanthroline for 2), have been synthesized and structurally characterized by single-crystal X-ray diffraction methods. Their crystal structures are featured by the linear arrangement of three zinc atoms linked by six cinnamate anions with the aromatic ligands residing outside. In the crystal structure of 1, the [Zn 3(PhCH CHCOO) 6(bpy) 2] complex molecules are interlinked by C–H⋯O weak hydrogen-bonding interactions into one-dimensional chains parallel to [1 1 0] direction; and in 2, the [Zn 3(PhCH CHCOO) 6(phen) 2] complex molecules are held together by C–H⋯O weak hydrogen-bonding interactions and π–π stacking interactions between the 1,10-phenanthroline groups of neighbouring complex molecules into one-dimensional chains parallel to [1 1 0] direction. Compounds 1 and 2 both exhibit stronger fluorescence compared to that of the free ligands in solid state at room temperature.