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Three Nickel(II) and Zinc(II) Complexes with Two Novel Nitronyl Nitroxide Ligands: Syntheses, Crystal Structures, and Luminescent Properties
Author(s) -
Zhang YouJuan,
Wang JunJie,
Chen Jing
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.201200151
Subject(s) - stacking , supramolecular chemistry , hydrogen bond , chemistry , crystallography , intermolecular force , luminescence , steric effects , crystal structure , nitroxide mediated radical polymerization , quinoxaline , zinc , nickel , single crystal , stereochemistry , molecule , materials science , polymer , organic chemistry , optoelectronics , radical polymerization , copolymer
To explore the coordination abilities of nitronyl nitroxide ligands, two ligands substituted with quinoxaline ( L 1 ) and 2‐phenyl‐1, 2, 3‐triazole ( L 2 ) and their Ni II and Zn II complexes: Ni( L 1 )(hfac) 2 ( 1 ), Ni( L 2 )(hfac) 2 ( 2 ), and Zn( L 2 )(hfac) 2 ( 3 ) (hfac = hexafluoroacetylacetonate), were synthesized and characterized. X‐ray single‐crystal diffraction analysis shows that compound 1 has a mononuclear structure, which is further linked into a three‐dimensional (3D) supramolecular network by C–H ··· F hydrogen‐bonding, C–H ··· π, and π ··· π stacking interactions. Complexes 2 and 3 have similar mononuclear structures, which are further linked into one‐dimensional (1D) supramolecular chains by various intermolecular weak interactions, such as C–H ··· F hydrogen‐bonding, and π ··· π stacking interactions. The results indicate that the steric bulk of L 1 and L 2 and the existence of hexafluoroacetylacetonate (hfac) play important roles in controlling the formation of the final frameworks of complexes 1 – 3 . Moreover, the luminescent properties of the ligands and their complexes were investigated in detail.