Development of optical oxygen and temperature sensors based on visible and infrared emitting lanthanide ion complexes

• Grant number: 18/20997-3
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): May 01, 2019
• Effective date (End): April 30, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Cooperation agreement: CNPq - INCTs
• Principal researcher: Celio Pasquini
• Grantee: Rafael Di Lazaro Gaspar
• Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 14/50951-4 - INCT 2014: Advanced Analytical Technologies, AP.TEM
• Associated scholarship(s): 19/22578-0 - Synthesis of novel phosphorescent oxygen sensing probes and their evaluation by spectroscopy and live cell PLIM microscopy, BE.EP.PD

Abstract

Oxygen and temperature are fundamental parameters in several biochemical, medical and environmental processes. The evaluation of such parameters is generally achieved by conventional devices such as thermometers for temperature and amperometric methods for oxygen determination, such as Clark electrode. Optical sensors show some advantages over these conventional methods, such high sensitivity, fast reversible response and easy miniaturization, making its use attractive in diverse applications. In this project, the fabrication of luminescent polymeric materials based on lanthanide ion complexes inserted in silicone as optical sensors for temperature and dissolved oxygen is intended. Oxygen emission suppression of Nd(III), Er(III) e Yb(III) quinolinate complexes in the infrared region and the thermal suppression of Eu(III) and/or Tb(III) betadiketonate complexes in the visible region will be explored in these materials. The complexes will be anchored in functionalized polydimethylsiloxane, yielding auto assembled luminescent membranes. Sensing platforms containing the polymeric materials will be developed for determination of temperature and oxygen in real samples, such as dissolved oxygen in water and temperature in chemical processes. In addition, figures of merit and cross-interference between oxygen and temperature will be evaluated in the analytical determination. (AU)