AUTHOR=Cui Chunguo , Song Lina , Li Chao , Lin Tiantian , Shi Kaiyao 

TITLE=Photophysical Details and O2-Sensing Analysis of a Eu(III) Complex in Polymer Composite Nanofibers Prepared by Electrospinning

JOURNAL=Frontiers in Chemistry

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.812461

DOI=10.3389/fchem.2021.812461

ISSN=2296-2646

ABSTRACT=<p>An as-synthesized Eu(III) complex, denoted as Eu(N-DPNQ)(TTD)<sub>3</sub>, was prepared and characterized, and the antenna mechanism between these ligands and central metal emitter was studied. Here DPNQ means 10-ethyl-10H-indolo [2′,3':5,6]pyrazino[2,3-f][1,10]phenanthroline and TTD is 4,4,4-trifluoro-1-(thiophen-2-yl)butane-1,3-dione. We find that Eu(N-DPNQ)(TTD)<sub>3</sub> emission intensity dependents on oxygen concentration, and O<sub>2</sub>-sensing skill of Eu(N-DPNQ)(TTD)<sub>3</sub> in polymer composite nanofibers of poly (vinylpyrrolidone) (PVP) prepared by electrospinning is investigated. Results reveal that the emission quenching of Eu(N-DPNQ)(TTD)<sub>3</sub> is caused by the ground state (triplet) oxygen quenching on antenna ligands triplet state. The Eu(N-DPNQ)(TTD)<sub>3</sub> doped composite nanofiber with a loading level of 6 wt% exhibits the best result with sensitivity of 2.43 and response time of 10 s, along with linear response.</p>