Premium
Interaction of Zn II Porphyrin with TiO 2 Nanoparticles: From Mechanism to Synthesis of Hybrid Nanomaterials
Author(s) -
Spadavecchia Jolanda,
Méthivier Christophe,
Landoulsi Jessem,
Pradier ClaireMarie
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201300193
Subject(s) - nanomaterials , nanoparticle , nanotechnology , porphyrin , adsorption , chemistry , molecule , materials science , photochemistry , organic chemistry
The mechanism of interaction of Zn porphyrin (ZnPP) with TiO 2 surfaces is investigated with a view to optimizing the synthesis of hybrid nanomaterials. The strategy consists of studying the adsorption of ZnPP on TiO 2 flat surfaces by taking advantage of complementary surface characterization techniques. Combining a detailed X‐ray photoelectron spectroscopic analysis with AFM imaging allows ZnPP–surface and ZnPP intermolecular interactions to be discriminated. Probing the adsorption of ZnPP on TiO 2 nanoparticles (NPs) reveals the dominant role of ZnPP‐mediated interactions, which are associated with the formation of ZnPP multilayers and/or with the state of aggregation of NPs. These preliminary investigations provide a guideline to synthesizing a novel ZnPP–TiO 2 hybrid nanomaterial in a one‐step protocol. In this material, ZnPP molecules are presumably involved in the TiO 2 lattice rather than on the NP surface. Furthermore, ZnPP molecules preserve their electronic properties within the TiO 2 NPs, and this makes the ZnPP–TiO 2 hybrid nanomaterial an excellent candidate for nanomedicine and related applications, such as localization of nanoparticles in cells and tissues or in photodynamic therapy.