No abstract

No abstract

An extremely long ribbon-shaped polyoxometalate (POM) octamer, {Eu16­Co7­Se16­W128­O448­(CIT)10­(HCIT)2­(NO3)4­(OH)4­(H2O)52} (H4CIT = citric acid), with a maximum length of ca. 6 nm has been obtained, which is the longest molecular POM reported to date and the first Dawson-based 3d–4f-containing selenotungstate­(IV). The nanoscale octamer is built from 8 new Dawson-type Eu2W2-substituted selenotungstates {(Eu2W2O4)­Se2W14O52} bridged by 12 H4CIT ligands and 3 Co2+ ions, giving rise to a rare giant inorganic–organic hybrid molecular POM with more than 150 metal centers (7 CoII, 16 EuIII, 16 SeIV, and 128 WVI). Especially, with 128 W centers and more than 800 non-H atoms, the POM octamer also represents the largest known 3d–4f-containing polyoxotungstate.

Hybrid systems combining the molecular catalyst and semiconductors have been demonstrated to be feasible and efficient for water oxidation under visible light illumination. Herein, we present a brief review on recent developments of constructing molecule/semiconductor hybrid systems. These hybrid systems combined molecular catalysts with dye-sensitized semiconductors or visible-light-response semiconductors. This review systematically summarizes the fabrication strategies of hybrid systems in photoelectrochemical (PEC) water splitting and powdered photocatalytic water oxidation. Furthermore, we highlight the excellent water oxidation performances and stability of different hybrid systems and provide valuable guidance to design construction strategies for more robust and capable devices.[a] Dr.

No abstract

An octanuclear Cu(ii) cluster [Cu8(dpk·OH)8(OAc)4](ClO4)4 was found to be an efficient homogeneous catalyst for photocatalytic water oxidation with an oxygen yield, TON and TOF of 35.6%, 178 and 3.6 s−1, respectively.

No abstract

Two five-coordinate mononuclear copper complexes, [Cu(mpydien)](ClO4)2 (1, mpydien = 5-methyl-1,9-bis (2-pyridyl)-2,5,8-triazanonane) and [Cu(pydien)](ClO4)2 (2, pydien = 1,9-bis (2-pyridyl)-2,5,8-triazanonane), are synthesized and found to be molecular electrochemical water oxidation catalyst (WOCs)...