PVP thin films doped with rare earth complexes and silver nanoparticles for use on biological marking and optical sensors

• Grant number: 15/23251-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2016
• End date: October 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Maria Claudia França da Cunha Felinto
• Grantee: Luana dos Anjos Souza
• Host Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

The project aims at preparation of polymeric olymeric films of Polyvinylpyrrolidone (PVP), doped with different concentrations of ions complexes Rare Earth (TR3 +) and silver nanoparticles (NPs Ag), for applications such as biomarker and optical sensors. In a first step be prepared TR3 + complexes and these complexes are further characterized using analyzes commonly used for characterization of rare earth compounds: elemental analysis of C, H, N, S; complexometric determination of TR3 + ions, XRD and IR, TGA / DTGA, spectroscopic studies of luminescence (excitation / emission), to characterize their physicochemical properties. Later in the second stage of the work plan, PVP films doped with TR3 + complexes will be synthesized and crosslinked with UV-C radiation (254 nm). To check the behavior of the properties of these films will be held the analyzes cited for the complex absorption spectroscopy and UV-Vis in the region, and study the degree of swelling and weight loss. In a third step of PVP films doped with complex design + TR3 and NPsAg by adding AgNO3 be synthesized and subjected to UV-C radiation for the reduction of Ag + ions and crosslink the polymer. In the characterizations previously described is also performed to assess MET distances between silver dots and the size of these particles. With this study aims to evaluate the influence of the plasmon effect on PL characteristic of TR3 + complexes and check for changes in the formation of NPsAg and crosslinking of PVP films, when this has in its structure the TR3 + complex. It is emphasized that there is still no results in the research literature that unite all studies of interest of this project.