Emission from the charge transfer state of xanthene dye-sensitized TiO2 nanoparticles: a new approach to determining back electron transfer rate and verifying the Marcus inverted regime

Article Abstract:

The study of electron injection and back electron transfer dynamics of xanthene dyes adsorbed on TiO2 nanoparticles by picosecond transient absorption and time-resolved fluorescence spectroscopy is presented. In the case of xanthene dyes it was found that, when the dye molecules are adsorbed on the TiO2 nanoparticle surface a good portion of the molecule form charge transfer complexes and electron transfer also takes place from dye molecule to nanoparticle on excitation of this system.

Electric properties, Charge transfer, Titanium

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Dynamics of interfacial electron transfer from photoexcited quinizarin (Qz) into the conduction band of TiO2 and surface states of ZrO2 nanoparticles

Article Abstract:

The femtosecond transient absorption spectroscopy in the visible and near-IR region are used to study the electron injection and back-electron-transfer (BET) dynamics of quinizarin (Qz) adsorbed on TiO2 and ZrO2 nanoparticles. The electron injection into the surface states of nanoparticles is facilitated when the adsorbed sensitizer molecule forms a strong charge-transfer (CT) complex with the semiconductor nanoparticles.

Nanotechnology

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Strongly coupled ruthenium-polypyridyl complexes for efficient electron injection in dye-sensitized semiconductor nanoparticles

Article Abstract:

Dynamics of interfacial electron transfer (ET) in the ruthenium-polypyridyl complex [{bis(2,2'-bpy)-(4-[2-(4'-methyl-2,2'-bipyridinyl-4-yl)vinyl]benzene-1,2-diol)} ruthenium (II) hexafluorophosphate] (Ru-cat)-sensitized TiO(sub 2) nanoparticles is investigated. It is observed that Ru-cat is coupled strongly with the TiO(sub 2) nanoparticles through its pendant catechol moiety.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Ruthenium, Atomic properties, Nanoparticles

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