Controllable CO2 Reduction or Hydrocarbon Oxidation Driven by Entire Solar via Silver Quantum Dots Direct Photocatalysis.

The current solar-chemical-industry based on semiconductor photocatalyst is impractical. Metal catalysts are extensively employed in thermal- and electro-catalysis industries, but unsuitable for direct-driven photocatalysis. Herein, silver quantum dots (Ag-QDs) are synthesized on support via an in situ photoreduction method, and in situ photocatalysis temperature programmed dynamics chemisorption desorption analyses are designed to demonstrate that Ag-QDs should be the actual photocatalytic sites. The surface plasmon resonance of Ag-QDs could harvests entire visible solar, and the plasmon-driven charge-transfer exhibits opposite directions at the interface when supports are different. Consequently, Ag-QDs could be alternatively regulated as oxidation or reduction active centers. Furthermore, Ag-QDs excite electron tunneling transfer with adsorbate, which does not generate high-energy free-radical intermediates. As a result, the efficiencies of hydrocarbon photooxidation and CO2 photoreduction are improved in several orders of magnitude. Evidently, the Ag-QDs direct photocatalytic technology greatly promotes solar-chemical-industry applications.

Bis(1,3-thia-zol-2-aminium) hexa-chlorido-stannate(IV).

The asymmetric unit of the title compound, (C3H5N2S)2[SnCl6], contains one cation in a general position and one-half of the dianion situated on an inversion center. The geometry of the [SnCl6](2-) dianion is almost regular octa-hedral. In the crystal, weak N-H⋯Cl and N-H⋯S hydrogen bonds and electrostatic forces link cations and anions into a three-dimensional framework.

Bis(4-acetyl-anilinium) hexa-chlorido-stannate(IV).

In the title compound, (C(8)H(10)NO)(2)[SnCl(6)], the Sn(IV) atom exists in an octa-hedral coordination environment. In the crystal, inter-molecular N-H⋯O and N-H⋯Cl hydrogen bonds link the cations and anions into a three-dimensional framework.

2-Amino-terephthalic acid-4,4'-bipyridine (1/1).

The asymmetric unit of the title compound, C(10)H(8)N(2)·C(8)H(7)NO(4), contains two half-mol-ecules, which constitute a 1:1 co-crystal. The 2-amino-terephthalic acid mol-ecule is situated on an inversion center being disordered between two orientations in a 1:1 ratio. In the 4,4'-bipyridine mol-ecule, which is situated on a twofold rotational axis, the two pyridine rings form a dihedral angle of 37.5 (1)°. In the crystal, mol-ecules are held together via inter-molecular N-H⋯O and O-H⋯N hydrogen bonds. The crystal packing exhibits π-π inter-actions between the aromatic rings with a centroid-centroid distance of 3.722 (3) Å.

Tetra-kis[(4-meth-oxy-carbon-yl)anilinium] hexa-chloridostannate(IV) dichloride.

The asymmetric unit of the title compound, (C(8)H(10)NO(2))(4)[SnCl(6)]Cl(2), contains two (4-meth-oxy-carbon-yl)anilinium cations, one chloride anion and one half of a hexa-chlorido-stannate(IV) dianion situated on a twofold rotation axis. All aminium H atoms are involved in N-H⋯Cl hydrogen bonding, which consolidate the crystal packing along with weak C-H⋯O inter-actions.

Bis[3-(meth-oxy-carbon-yl)anilinium] hexa-chloridostannate(IV).

In the title compound, (NH(3)C(6)H(4)CO(2)CH(3))(2)[SnCl(6)], the anions are situated on inversion centers so the asymmetric unit contains one cation and one half-anion. In the crystal, inter-molecular N-H⋯Cl and N-H⋯O hydrogen bonds link the cations and anions into layers parallel to the ac plane. The crystal packing exhibits voids of 37 Å(3).

(1-{2-[2-(2-Ammonio-ethyl-amino)ethyl-amino]ethyl-imino-meth-yl}-2-naphtholato-κO,N,N',N'')chloridocopper(II) chloride.

In the square-pyramidal title complex, [CuCl(C(17)H(24)N(4)O)]Cl, the Cu(II) atom is coordinated by three N atoms [Cu-N 1.946 (2), 2.010 (2), 2.085 (3) Å], one O atom [Cu-O 1.910 (2) Å] and one apical Cl atom [Cu-Cl 2.6437 (9) Å]. The three coordinated N and one O atom are almost coplanar, with a maximum deviation of 0.0268 Å. The tetra-dentate ligand forms two five-membered (N-Cu-N) and one six-membered (N-Cu-O) chelate rings with bite angles of 84.06 (10), 85.30 (10) and 91.70 (9)°, respectively. The two N-Cu-N chelate rings are non-planar.

Bis[2-(2-hydroxy-3-meth-oxy-phen-yl)benzimidazolium] tetrachlorido-cuprate(II) methanol disolvate.

In the title compound, (C(14)H(13)N(2)O(2))(2)[CuCl(4)]·2CH(4)O, the geometry of the CuC1(4) (2-) ions (Cu site symmetry 2) is inter-mediate between tetra-hedral and square-planar. The dihedral angle between the benzimidazole and benzene ring systems is 8.74(14)°. A network of N-H⋯O, N-H⋯Cl and O-H⋯Cl hydrogen bonds helps to consoldiate the structure. Aromatic π-π stacking inter-actions involving the benzimidazole ring system, with a centroid-centroid distance of 3.785 (3) Å, also occur.