The zinc(Ⅱ) complex with Hpbx (Hpbx = 2-(benzoxazol-2-yl)phenol) and Hpbm (Hpbm = 2-(benzimidazol-2-yl)phenol), namely [Zn(pbm)2]1.633[Zn(pbx)2]2.367·DMF·2H2O 1, has been synthesized and characterized by X-ray crystallography, FTIR and elemental analysis. The coordination structures are statistically disordered and can be regarded as a co-crystal of [Zn(pbm)2] and [Zn(pbx)2] with the ratio of ca. 0.408/0.592. Solvate water and DMF molecules are also present in the lattice. Crystal data for 1: monoclinic, space group P21/c, Mr = 2049.02, Z = 2, a = 9.7571(6), b = 25.6415(16), c = 19.8675(10) , β = 111.342(2)o, V = 4629.7(5) 3, Dc = 1.470 g/cm3, μ = 1.100 mm-1, F(000) = 2104, R = 0.0575 and wR = 0.1282 for 5528 observed reflections (I > 2σ(I)). The photoluminescent spectra for this compound have also been studied.
以七水硫酸锌和碳酸氢钠为主要原料,采用室温固相法结合微波热分解法制备了纳米氧化锌。为改善氧化锌微粒表面的物理化学性质,采用硬脂酸对氧化锌表面进行改性,探讨了硬脂酸改性纳米氧化锌粉体的工艺条件、表面改性机理及其对粉体颗粒亲油性的影响。采用红外光谱对改性后纳米氧化锌进行了表征,结果表明硬脂酸和纳米氧化锌之间以共价键结合,改性后纳米氧化锌能更好地分散在有机溶剂里。纳米氧化锌表面改性的最佳工艺条件:硬脂酸质量分数为10%,改性温度为60℃,改性时间为40 m in。
The title compound has been synthesized and characterized crystallographically. It is a co-crystal consisting of two different neutral zinc(II) complexes with Hbpbm (Hbpbm = 4- bromo-2-(benzimidazol-2-yl)phenol) and Hnpbm (Hnpbm = 2-(1-butylbenzimidazol-2-yl)phenol). One is a monomeric mixed-ligand complex of [Zn(bpbm)(npbm)] 1 and the other a dimer of [Zn2(npbm)4] 2 with their ratio of 2:1. Thus the overall formula for the title compound is 21·2. Adjacent 1 and 2 are connected to each other by intermolecular hydrogen bonding interactions in the lattice. The crystal data: monoclinic, space group P21/c, a = 15.0141(12), b = 20.9941(17), c = 18.4686(15) , β = 97.445(2)o, V = 5772.4(8) 3, Mr = 2429.68, Z = 2, Dc = 1.398 g/cm3, μ = 1.579 mm-1, F(000) = 2504, R = 0.0637 and wR = 0.1771 for 6464 observed reflections (I > 2σ(I)). The geometrical structure for 1 has also been theoretically optimized and compared with the experi- mental one.
