Premium
Controlled Electropolymerization of Ruthenium(II) Vinylbipyridyl Complexes in Mesoporous Nanoparticle Films of TiO 2
Author(s) -
Fang Zhen,
Keinan Shahar,
Alibabaei Leila,
Luo Hanlin,
Ito Akitaka,
Meyer Thomas J.
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201402309
Subject(s) - cyclic voltammetry , ruthenium , mesoporous material , x ray photoelectron spectroscopy , polymerization , nanoparticle , materials science , chemistry , chemical engineering , photochemistry , polymer chemistry , inorganic chemistry , electrochemistry , nanotechnology , electrode , catalysis , organic chemistry , polymer , engineering
Surface‐initiated, oligomeric assemblies of ruthenium(II) vinylpolypyridyl complexes have been grown within the cavities of mesoporous nanoparticle films of TiO 2 by electrochemically controlled radical polymerization. Surface growth was monitored by cyclic voltammetry as well as UV/Vis and X‐ray photoelectron spectroscopy. Polymerization occurs by a radical chain mechanism following cyclic voltammetry scans to negative potentials where reduction occurs at the π* levels of the polypyridyl ligands. Oligomeric growth within the cavities of the TiO 2 films occurs until an average of six repeat units are added to the surface‐bound initiator site, which is in agreement with estimates of the internal volumes of the pores in the nanoparticle films.