Synthesis, Crystal Structure, and Luminescent Property of One New Quinoxaline-substituted Nitronyl Nitroxide Complex [Ni(acac)(2)(NITQ)(2)]center dot 2CH(2)Cl(2)

A new complex, [Ni(acac)(2)(NITQ)(2)]center dot 2CH(2)Cl(2) 1 (acac = acetylacetone, NITQ = 2-(2'-quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), was synthesized and characterized by elemental analysis, IR spectroscopy, UV-Vis absorption spectrum, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P2(1)/c with a = 9.6970(19), b = 20.410(4), c = 12.166(2) angstrom, beta = 93.89(3)degrees, M-r = 997.43, V = 2402.3(8) angstrom(3), Z = 2, D-c = 1.379 g/cm(3), F(000) = 1040, At = 0.684 mm(-1), the final R = 0.0423 and wR = 0.1197 for 2884 observed reflections (I > 2 sigma(I)). Compound 1 is found to assume a mononuclear structure, which is further linked into a three-dimensional (3D) supramolecular network by hydrogen-bonding, Cl center dot center dot center dot O weak contact and pi-pi stacking interactions. Moreover, the luminescent properties of the ligand and compound 1 were further investigated in detail.