Solvothermal reaction of copper（I） cyanide （CuCN） with triphenylphosphine （Ph3P） in anhydrous tetrahydrofuran （THF） leads to a CuCN-based coordination polymer Cu3（CN）3（PPh3）4 （1） by using standard Schlenk techniques. This complex crystallizes in triclinic,space group P1 with a = 13.281（7）,b = 13.330（7）,c = 20.654（11） ,α = 103.028（5）,β = 96.824（5）,γ = 101.916（5）°,V = 3433（3） 3,Dc = 1.275 g/cm3,Z = 2,C75H60Cu3N3P4,Mr = 1317.76,μ = 1.057 mm-1,λ（MoKα） = 0.71073 and F（000） = 1356. 6975 observed reflections with I 〉 2σ（I） and 766 parameters gave R = 0.0669,wR = 0.1403 and S = 1.005. The structure exhibits a special stair-like chain along the [111] direction constructed from cyanide groups alternately connecting the Cu（I） and Cu（PPh3）2 moieties. These stair-like chains are further stacked together via abundant π-π and C-H···π interactions to form a 3-D structure.
Oxygen evolution cocatalysts(OECs)play important roles in improving the efficiency of photocatalysts in solar water splitting.Inorganic–organic hybrid polymers(IOHPs),which have good electrolyte accessibility and evenly distributed active sites,are expected to be promising OECs.Here,a novel IOHP[Co(Bpn)_(2)(SCN)_(2)]n(1,Bpn=2,6-bis(4-pyridyl)-naphthalene,SCN=thiocyanate ion)exhibited a two-dimensional(2D)layer structure with(4,4)topology,was constructed by Bpn ligands connecting Co(II)ions,and was decorated on BiVO_(4) photoanodes for photoelectrochemical(PEC)water oxidation.The 1/BiVO_(4) hybrid electrode showed significantly negative onset potential and approximately 3.7 times higher photocurrent density at 1.23 V versus reversible hydrogen electrode(RHE)compared with the bare BiVO_(4).The mechanisms for the improved PEC efficiency were investigated and mainly ascribed to enhanced water oxidation kinetics and increased charge separation and transfer properties.This work provides a promising OEC candidate for PEC water oxidation and sheds light on the attractive application prospect of IOHPs for solar water splitting.
Wenlong GuoSi ShuTong ZhangYanlin TaoYinqiong XieXi Liu
A new metal-organic coordination polymer, [Ce（L1）（L2）（H2O）]2H2O （1, H2L1 = 2,6-dimethylpyridine-3,5-diearboxylie acid, H2L2 = （E）-2,6-dimethyl-4-styrylpyridine-3,5-dieerboxylie acid）, has been synthesized and characterized by elemental analysis, IR, and X-ray single-crystal diffraction. Compound 1 crystallizes in trielinic, space group P1 and displays a two-dimensional coordination network structure. In 1, the relatively rare crossed ladders constructed by mixed ligands organize a 2-D grid with the topology of （426）2（48668）, and the layers further build up a 3-D supramoleeular architeetttre via interlaminar hydrogen bonds.
