Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance

Owing to their attractive potential in optoelectronic application, luminescent Ru(II) complexes with diamine ligands are harvesting more and more research efforts. These literature efforts, however, are mostly mononuclear ones, with no detailed discussion on the performance comparison between mononu...

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Autores principales:	Fei Wang, Liyuan Yang, Xue-Quan Xian
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	multinuclear Ru(II) mononuclear Ru(II) linear response optical oxygen sensing electrospun fiber Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/6f068db4c6184268a305789a0ac8ebe3
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spelling	oai:doaj.org-article:6f068db4c6184268a305789a0ac8ebe32021-11-30T15:57:37ZComparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance2296-264610.3389/fchem.2021.785309https://doaj.org/article/6f068db4c6184268a305789a0ac8ebe32021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fchem.2021.785309/fullhttps://doaj.org/toc/2296-2646Owing to their attractive potential in optoelectronic application, luminescent Ru(II) complexes with diamine ligands are harvesting more and more research efforts. These literature efforts, however, are mostly mononuclear ones, with no detailed discussion on the performance comparison between mononuclear and multinuclear Ru(II) complexes. This work synthesized three diamine ligands having two or multiple chelating sites in each ligand, as well as their Ru(II) complexes. The single-crystal structure, electronic structure, and photophysical parameters of these Ru(II) complexes were analyzed and compared. It was found that multinuclear Ru(II) complexes had a pure MLCT (metal-to-ligand charge transfer)–based emissive center, showing longer emission lifetime and higher emission quantum yield, which were desired for oxygen sensing. Then, the oxygen sensing performance of these mononuclear and multinuclear Ru(II) complexes was systematically compared by doping them into polymer fibers via electrospinning method. Improved oxygen sensing performance was observed from binuclear Ru(II)-doped nanofibrous samples, compared with the sensing performance of mononuclear ones, including higher sensitivity, shorter response/recovery time, and better photostability. The causation was attributed to the fact that the emissive state of multinuclear Ru(II) complexes was MLCT-based ones and thus more sensitive to O2 quenching than monocular Ru(II) complexes whose emissive state was a mixture of MLCT and LLCT (ligand-to-ligand charge transfer). In addition, a multinuclear Ru(II) complex had multiple emissive/sensing components, so that its sensing collision probability with O2 was increased, showing better photostability and shorter response/recovery time. The novelty of this work was the linear oxygen sensing curve, which was rarely reported in the previous work.Fei WangLiyuan YangXue-Quan XianFrontiers Media S.A.articlemultinuclear Ru(II)mononuclear Ru(II)linear responseoptical oxygen sensingelectrospun fiberChemistryQD1-999ENFrontiers in Chemistry, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	multinuclear Ru(II) mononuclear Ru(II) linear response optical oxygen sensing electrospun fiber Chemistry QD1-999
spellingShingle	multinuclear Ru(II) mononuclear Ru(II) linear response optical oxygen sensing electrospun fiber Chemistry QD1-999 Fei Wang Liyuan Yang Xue-Quan Xian Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
description	Owing to their attractive potential in optoelectronic application, luminescent Ru(II) complexes with diamine ligands are harvesting more and more research efforts. These literature efforts, however, are mostly mononuclear ones, with no detailed discussion on the performance comparison between mononuclear and multinuclear Ru(II) complexes. This work synthesized three diamine ligands having two or multiple chelating sites in each ligand, as well as their Ru(II) complexes. The single-crystal structure, electronic structure, and photophysical parameters of these Ru(II) complexes were analyzed and compared. It was found that multinuclear Ru(II) complexes had a pure MLCT (metal-to-ligand charge transfer)–based emissive center, showing longer emission lifetime and higher emission quantum yield, which were desired for oxygen sensing. Then, the oxygen sensing performance of these mononuclear and multinuclear Ru(II) complexes was systematically compared by doping them into polymer fibers via electrospinning method. Improved oxygen sensing performance was observed from binuclear Ru(II)-doped nanofibrous samples, compared with the sensing performance of mononuclear ones, including higher sensitivity, shorter response/recovery time, and better photostability. The causation was attributed to the fact that the emissive state of multinuclear Ru(II) complexes was MLCT-based ones and thus more sensitive to O2 quenching than monocular Ru(II) complexes whose emissive state was a mixture of MLCT and LLCT (ligand-to-ligand charge transfer). In addition, a multinuclear Ru(II) complex had multiple emissive/sensing components, so that its sensing collision probability with O2 was increased, showing better photostability and shorter response/recovery time. The novelty of this work was the linear oxygen sensing curve, which was rarely reported in the previous work.
format	article
author	Fei Wang Liyuan Yang Xue-Quan Xian
author_facet	Fei Wang Liyuan Yang Xue-Quan Xian
author_sort	Fei Wang
title	Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
title_short	Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
title_full	Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
title_fullStr	Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
title_full_unstemmed	Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance
title_sort	comparison between binuclear and mononuclear ru(ii) complexes: synthesis, structure, photophysics, and oxygen sensing performance
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/6f068db4c6184268a305789a0ac8ebe3
work_keys_str_mv	AT feiwang comparisonbetweenbinuclearandmononuclearruiicomplexessynthesisstructurephotophysicsandoxygensensingperformance AT liyuanyang comparisonbetweenbinuclearandmononuclearruiicomplexessynthesisstructurephotophysicsandoxygensensingperformance AT xuequanxian comparisonbetweenbinuclearandmononuclearruiicomplexessynthesisstructurephotophysicsandoxygensensingperformance
_version_	1718406511341862912

Comparison Between Binuclear and Mononuclear Ru(II) Complexes: Synthesis, Structure, Photophysics, and Oxygen Sensing Performance

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