《Controlling and Optimizing Photoinduced Charge Transfer across Ultrathin Silica Separation Membrane with Embedded Molecular Wires for Artificial Photosynthesis》 was written by Zhang, Hongna; Weiss, Ian; Rudra, Indranil; Jo, Won Jun; Kellner, Simon; Katsoukis, Georgios; Galoppini, Elena; Frei, Heinz. Synthetic Route of C30H30N10This research focused onultrathin silica separation membrane photoinduced charge transfer mol wire; artificial photosynthesis ultrathin silica separation membrane photoinduced charge transfer; FT-IRRAS spectroscopy; artificial photosynthesis; charge flux; electron transfer; molecular wires; photocurrent measurements; ultrathin silica membrane. The article conveys some information:
Ultrathin amorphous silica membranes with embedded organic mol. wires (oligo(p-phenylenevinylene), three aryl units) provide chem. separation of incompatible catalytic environments of CO2 reduction and H2O oxidation while maintaining electronic and protonic coupling between them. For an efficient nanoscale artificial photosystem, important performance criteria are high rate and directionality of charge flow. Here, the visible-light-induced charge flow from an anchored Ru bipyridyl light absorber across the silica nanomembrane to Co3O4 water oxidation catalyst is quant. evaluated by photocurrent measurements. Charge transfer rates increase linearly with wire d., with 5 nm-2 identified as an optimal target. Accurate measurement of wire and light absorber densities is accomplished by the polarized FT-IRRAS method. Guided by d. functional theory (DFT) calculations, four wire derivatives featuring electron-donating (methoxy) and -withdrawing groups (sulfonate, perfluorophenyl) with HOMO (HOMO) potentials ranging from 1.48 to 0.64 V vs. NHE were synthesized and photocurrents evaluated. Charge transfer rates increase sharply with increasing driving force for hole transfer from the excited light absorber to the embedded wire, followed by a decrease as the HOMO potential of the wire moves beyond the Co3O4 valence band level toward more neg. values, pointing to an optimal wire HOMO potential around 1.3 V vs. NHE. Comparison with photocurrents of samples without nanomembrane indicates that silica layers with optimized wires are able to approach undiminished electron flux at typical solar intensities. Combined with the established high proton conductivity and small-mol. blocking property, the charge transfer measurements demonstrate that oxidation and reduction catalysis can be efficiently integrated on the nanoscale under separation by an ultrathin silica membrane.Tris((1-benzyl-1H-1,2,3-triazol-4-yl)methyl)amine(cas: 510758-28-8Synthetic Route of C30H30N10) was used in this study.
Tris((1-benzyl-1H-1,2,3-triazol-4-yl)methyl)amine(cas: 510758-28-8) is a polytriazolylamine ligand which stabilizes Cu(I) towards disproportionation and oxidation thus enhancing its catalytic effect in the azide-acetylene cycloaddition.Synthetic Route of C30H30N10
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics