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Copper(I) complexes as alternatives to iridium(III) complexes for highly efficient oxygen sensing.
Santiago Medina-Rodríguez1, Francisco J Orriach-Fernández, Christopher Poole
1Department of Signal Theory, Networking and Communications, CITIC-UGR, University of Granada, C/ Periodista Rafael Gómez 2, E-18071 Granada, Spain. atv@ugr.es.
Chemical Communications (Cambridge, England)
|June 19, 2015
Summary
A novel copper complex, [Cu(xantphos)(dmp)][PF6], demonstrates superior oxygen sensitivity when embedded in a nanostructured metal oxide matrix compared to iridium complexes.
Area of Science:
- Coordination Chemistry
- Materials Science
- Chemical Sensing
Background:
- Development of sensitive oxygen sensors is crucial for various applications.
- Metal complexes are widely explored as active components in optical oxygen sensors.
- Existing sensors often face limitations in sensitivity or stability.
Purpose of the Study:
- To synthesize and characterize a novel copper-based complex for oxygen sensing applications.
- To evaluate the oxygen sensitivity of the copper complex ([Cu(xantphos)(dmp)][PF6]) within a nanostructured metal oxide matrix.
- To compare its performance against established cyclometallated iridium complexes.
Main Methods:
- Synthesis of the copper complex [Cu(xantphos)(dmp)][PF6], where dmp is 2,9-dimethyl-1,10-phenanthroline.
- Incorporation of the copper complex into a nanostructured metal oxide matrix.
- Measurement of oxygen sensitivity (Stern-Volmer quenching constant, KSV) under varying partial pressures of oxygen (pO2).
- Comparative analysis with cyclometallated iridium complexes under identical conditions.
Main Results:
- The copper complex ([Cu(xantphos)(dmp)][PF6]) exhibited high oxygen sensitivity.
- Specifically, KSV values of 9.74 ± 0.87 kPa⁻¹ (0-1 kPa pO2) and 5.59 ± 0.15 kPa⁻¹ (0-10 kPa pO2) were recorded.
- The copper complex demonstrated superior oxygen sensitivity compared to cyclometallated iridium complexes.
Conclusions:
- The nanostructured metal oxide matrix enhances the oxygen sensing performance of the copper complex.
- [Cu(xantphos)(dmp)][PF6] presents a promising alternative to iridium complexes for optical oxygen sensing.
- This material offers improved sensitivity for oxygen detection in the specified ranges.
![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
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