Turning over on sticky balls: preparation and catalytic studies of surface-functionalized TiO<sub>2</sub> nanoparticles
作者:Sven A. Freimann、Alessandro Prescimone、Catherine E. Housecroft、Edwin C. Constable
DOI:10.1039/d0ra09319j
日期:——
(1)@TiO2 NPs and either RhCl3·3H2O or [Rh2(μ-OAc)4(H2O)2] produced the rhodium(III) complex-functionalized NPs Rh(1)2@TiO2. The functionalized NPs were characterized using thermogravimetric analysis (TGA), matrix-assisted laser desorption ionization (MALDI) mass spectrometry, 1H NMR and FT-IR spectroscopies; the single crystal structures of [Rh(1)2][NO3]3·1.25[H3O][NO3]·2.75H2O and of a phosphonate
Evidence that Δ<i>S</i><sup>‡</sup> Controls Interfacial Electron Transfer Dynamics from Anatase TiO<sub>2</sub> to Molecular Acceptors
作者:Ludovic Troian-Gautier、Brian N. DiMarco、Renato N. Sampaio、Seth L. Marquard、Gerald J. Meyer
DOI:10.1021/jacs.7b13243
日期:2018.2.28
Recombination of electrons injected into TiO2 with molecular acceptors present at the interface represents an important loss mechanism in dye-sensitized water oxidation and electrical power generation. Herein, the kinetics for this interfacialelectrontransfer reaction to oxidized triphenylamine (TPA) acceptors was quantified over a 70° temperature range for para-methyl-TPA (Me-TPA) dissolved in acetonitrile
Improved light absorbance does not lead to better DSC performance: studies on a ruthenium porphyrin–terpyridine conjugate
作者:Angelo Lanzilotto、Laura A. Büldt、Hauke C. Schmidt、Alessandro Prescimone、Oliver S. Wenger、Edwin C. Constable、Catherine E. Housecroft
DOI:10.1039/c5ra27397h
日期:——
3 and [Ru(3)(4)][PF6]2 undergo two, reversible porphyrin-centred oxidation processes at lower potential than the Ru2+/Ru3+ process in [Ru(3)(4)][PF6]2. In the solution absorption spectra, the Soret and Q bands in 3 are little perturbed upon complex formation; the MLCT band in [Ru(3)(4)][PF6]2 has λmax = 492 nm. Spectroelectrochemical data for 3 and [Ru(3)(4)][PF6]2 are presented. [Ru(3)(4)]2+ binds
A series of bis(terpyridine)Ru-II complexes have been prepared, where one of the terpyridines is functionalized in the 4'-position by a phosphonic or carboxylic acid group for attachment to TiO2. The other is functionalized, also in the 4'-position, by a potential electron donor. In complexes 1a, 3a, and 4a,b, this donor is tyrosine or hydrogen-bonded tyrosine, while in 2a it is carotenoic amide. The synthesis and photophysical properties of the complexes are discussed. On irradiation with visible light, the formation of a long-lived charge-separated state was anticipated, via primary electron ejection into the TiO2, followed by secondary electron transfer from the donor to the photogenerated Ru-III. However, such a charge-separated state could be observed with certainty only with complex 2a. To explain the result, quantum chemical calculations were performed on the different types of complexes.