Efficient photoinduced charge separation in layered zirconium viologen phosphonate compounds

Photochromic Intercalation Compounds

“…Thompson and his coworkers have reported stable photoinduced charge separation in layered zirconium phosphonate containing viologen moiety in both powder and thin-film samples [194,195]. In order to overcome the scattering problems associated with powder, transparent multilayer thin films of zirconium phosphonate viologen salt (ZrPV(X)) were grown directly onto fused silica substrates from aqueous solution.…”

Fabrication of multilayer films of viologen on a glassy carbon electrode by bottom-up layer-by-layer assembly

“…Various techniques, including Langmuir-Blodgett (LB) technique [1,2], selfassembled monolayer (SAM) [3][4][5][6] and the layer-by-layer assembly [7][8][9][10][11][12][13][14][15][16][17][18] techniques have been developed and successfully applied. Among these, the bottom-up layer-by-layer assembly is nowadays attracting much interest, since the procedure is simple and has high potentials for designing well-structured novel molecular functionalities.…”

“…Among these, the bottom-up layer-by-layer assembly is nowadays attracting much interest, since the procedure is simple and has high potentials for designing well-structured novel molecular functionalities. Various types of interconnection between the layers have been utilized including covalent bond [7], ionic interactions [8][9][10][11][12][13][14][15] and hydrogen bond [16]. Up to date, most of the work have devoted on the preparation of thin films on substrates such as ITO, metal and metal oxide electrodes by using this technique.…”

“…A multilayer synthesis based on the sequential adsorption of zirconium ion (Zr 4+ ) and xdiphosphonate alkanes was first applied to Si wafer [8] and then gold surfaces [9]. The preparation of crystalline layered zirconium viologen phosphonate compounds was also reported by Thompson's group [14]. In those studies, the substrate surface was first derivatized with phosphate groups in order to increase its affinity to Zr 4+ .…”

Determination of Strongly Interacting Spin Exchange Paths in Cu2(O3PCH2PO3) on the Basis of Spin Dimer Analysis

“…Metalorganophosphonates are a class of such materials with potential applications to catalysis, ion exchange, proton conductivity, photochemistry and intercalation chemistry, and have been studied extensively. [1][2][3] Copper-methylenediphosphonate, Cu 2 (O 3 PCH 2 PO 3 ), prepared by hydrothermal method and structurally characterized, 4 exhibits interesting magnetic properties with broad maximum at approximately 50 K. The magnetic susceptibility in the high temperature region were fitted by the Heisenberg linear antiferromagnetic chain model with g = 2.10, J/k B = −35.9 K and the Curie-Weiss temperature θ = −55 K. The latter shows the presence of a dominant antiferromagnetic (AFM) coupling. The deviation from the linear chain behavior was observed at low temperatures, which was attributed to the occurrence of a long-range three-dimensional (3D) ordering.…”