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Preparation and characterization of photochromic and luminescent conjugated composites for application in radiation sensors

Grant number: 18/23524-9
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2019
Effective date (End): June 30, 2022
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Laura Oliveira Péres Philadelphi
Grantee:Alessandra Stacchini Menandro
Host Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil
Associated scholarship(s):19/15498-0 - Stabilization of the fluorescent polymer containing thiophene in the sodium deoxycholate gel and determination of the mobility of small molecules in this polymer-gel system, BE.EP.DR


The development of new materials for radiation dosimeters has been growing and becoming important for diverse applications in the medical and hospital areas. Photochromic molecules are recently targeted because they are capable altering their absorption spectra and consequently their coloration when exposed to different radiation doses, ionizing or not. In this context, conjugated polymers present technological potential for application in dosimeters because they present, among many other advantages, easy processing, low cost and easy of manufacture in the form of thin films. Thus, this project will focus on the preparation of composites involving photochromic molecules and luminescent conjugated polymers, with the aim to obtain materials with new optical properties, derived from their interactions and photophysics process of energy transfer that can be used as active element of colorimetric and radiation sensors. In solid state, the mobility of the molecules and the methodology of preparation of the films became essential factors for the efficiency of the system to be formed. So, the composite films will be prepared having in mind the conditions and methods of preparation using a biopolymer, the chitosan, which will be the support for the films. In this way, with a completely study and characterization of the composites, it is expected to obtain new materials with advantageous properties for their future application in colorimetric radiation dosimeters. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MENANDRO, ALESSANDRA S.; SIQUEIRA, LEONARDO J. A.; OLIVEIRA, HUEDER P. M.; PERES, LAURA O.. Solvent effects and energy transfer processes in luminescent composite. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v. 397, . (15/14681-5, 18/23524-9, 14/50869-6)

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