Bifunctional Temperature and Oxygen Dual Probe Based on Anthracene and Europium Complex Luminescence

Author(s)

Galico, Diogo Alves ; Mazali, Italo Odone ; Sigoli, Fernando Aparecido

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 23, n. 23, p. 15-pg., 2022-12-01.

Abstract

In this work, we synthesized a polydimethylsiloxane membrane containing two emitter groups chemically attached to the membrane structure. For this, we attached the anthracene group and the [Eu(bzac)(3)] complex as blue and red emitters, respectively, in the matrix via hydrosilylation reactions. The synthesized membrane can be used as a bifunctional temperature and oxygen ratiometric optical probe by analyzing the effects that temperature changes and oxygen levels produce on the ratio of anthracene and europium(III) emission components. As a temperature probe, the system is operational in the 203-323 K range, with an observed maximum relative sensitivity of 2.06% K-1 at 290 K and temperature uncertainties below 0.1 K over all the operational range. As an oxygen probe, we evaluated the ratiometric response at 25, 30, 35, and 40 degrees C. These results show an interesting approach to obtaining bifunctional ratiometric optical probes and also suggest the presence of an anthracene -> europium(III) energy transfer, even though there is no chemical bonding between species. (AU)

• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 21/06326-1 - Luminescence of lanthanide ions: an optical tool against counterfeiting
• Grantee: Fernando Aparecido Sigoli
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
• Grantee: Fernando Galembeck
• Support Opportunities: Research Projects - Thematic Grants