Interaction of ZnII Porphyrin with TiO2 Nanoparticles: From Mechanism to Synthesis of Hybrid Nanomaterials. Issue 11 (2nd July 2013)

• Record Type: Journal Article
• Authors: Spadavecchia, Jolanda; Méthivier, Christophe; Landoulsi, Jessem; Pradier, Claire‐Marie
• Is Part Of: Chemphyschem. Volume 14:Issue 11(2013)
• Page Start: 2462
• Page End: 2469
• Publication Date: 2013-07-02
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201300193
• Languages: English
• ISSNs: 1439-4235

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The mechanism of interaction of Zn porphyrin (ZnPP) with TiO₂ surfaces is investigated with a view to optimizing the synthesis of hybrid nanomaterials. The strategy consists of studying the adsorption of ZnPP on TiO₂ 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 TiO₂ 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–TiO₂ hybrid nanomaterial in a one‐step protocol. In this material, ZnPP molecules are presumably involved in the TiO₂ lattice rather than on the NP surface. Furthermore, ZnPP molecules preserve their electronic properties within the TiO₂ NPs, and this makes the ZnPP–TiO₂ hybrid nanomaterial an excellent candidate for nanomedicine and related applications, such as localization of nanoparticles in cells and tissues or in photodynamic therapy.</p> </abstract>