CdS Nanocubes Adorned by Graphitic C3N4 Nanoparticles for Hydrogenating Nitroaromatics: A Route of Visible-Light-Induced Heterogeneous Hollow Structural Photocatalysis.

Modulating the transport route of photogenerated carriers on hollow cadmium sulfide without changing its intrinsic structure remains fascinating and challenging. In this work, a series of well-defined heterogeneous hollow structural materials consisting of CdS hollow nanocubes (CdS NCs) and graphitic C3N4 nanoparticles (CN NPs) were strategically designed and fabricated according to an electrostatic interaction approach. It was found that such CN NPs/CdS NCs still retained the hollow structure after CN NP adorning and demonstrated versatile and remarkably boosted photoreduction performance. Specifically, under visible light irradiation (λ ≥ 420 nm), the hydrogenation ratio over 2CN NPs/CdS NCs (the mass ratio of CN NPs to CdS NCs is controlled to be 2%) toward nitrobenzene, p-nitroaniline, p-nitrotoluene, p-nitrophenol, and p-nitrochlorobenzene can be increased to 100%, 99.9%, 83.2%, 93.6%, and 98.2%, respectively. In addition, based on the results of photoelectrochemical performances, the 2CN NPs/CdS NCs reach a 0.46% applied bias photo-to-current efficiency, indicating that the combination with CN NPs can indeed improve the migration and motion behavior of photogenerated carriers, besides ameliorating the photocorrosion and prolonging the lifetime of CdS NCs.

Nickel and zinc complexes with a monodentate heterocycle and tridentate Schiff base ligands: self-assembly to one- and two-dimensional supramolecular networks via hydrogen bonding.

In the complex (morpholine)[2-hydroxy-N'-(5-nitro-2-oxidobenzylidene)benzohydrazidato]nickel(II), [Ni(C(14)H(9)N(3)O(5))(C(4)H(9)NO)], (I), the Ni(II) center is in a square-planar N(2)O(2) coordination geometry. The complex bis[mu-2-hydroxy-N'-(2-oxidobenzylidene)benzohydrazidato]bis[(morpholine)zinc(II)], [Zn(2)(C(14)H(10)N(2)O(3))(2)(C(4)H(9)NO)(2)], (II), consists of a neutral centrosymmetric dimer with a coplanar Zn(2)(mu(2)-O)(2) core. The two Zn(II) centers are bridged by phenolate O atoms. Each Zn(II) center exhibits a distorted square-pyramidal stereochemistry, in which the four in-plane donors come from the O,N,O'-tridentate 2-hydroxy-N'-(2-oxidobenzylidene)benzohydrazidate(2-) ligand and a symmetry-related phenolate O atom, and the axial position is coordinated to the N atom from the morpholine molecule. There are intramolecular phenol-hydrazide O-H...N hydrogen bonds present in both (I) and (II). In (I), square-planar nickel complexes are linked by intermolecular morpholine-morpholine N-H...O hydrogen bonds, leading to a one-dimensional chain, while in (II) an infinite two-dimensional network is formed via intermolecular hydrogen bonds between the coordinated morpholine NH groups and the uncoordinated phenolate O atoms.