The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes

doi:10.1039/c8ra07115b

	The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes
	Zheng, Daoyuan 2; Li, Fayun 1; Di, Ling 1; Xing, Yang 1; Wang, Xiaoning 1; Yang, Yang 2
刊名	RSC ADVANCES
	2018
卷号	8 期号:71 页码:41040-41047
ISSN号	2046-2069
DOI	10.1039/c8ra07115b
通讯作者	Xing, Yang(xingyang@lnpu.edu.cn) ; Li, Fayun(flilnpu@163.com)
英文摘要	Three triphenylamine (TPA) substituted cyclometalated Ir(iii) complexes IrA1, IrA2, and IrA3 based on Ir(ppy)(3) were synthesized and applied as phosphorescent probes for the monitoring of molecular oxygen. The phosphorescence intensity of all the Ir(iii) complexes in tetrahydrofuran (THF) was gradually quenched with an increase of oxygen concentration. The increase of TPA substituents on the meta-position of 2-phenylpyridine (IrA1-IrA3) gradually improved the oxygen sensitivity of cyclometalated Ir(iii) complexes. IrA3 showed the highest oxygen sensitivity in THF with a KappSV of 204.8 bar(-1) and a limit of detection (LOD) of 0.27 mbar. The relationship between molecular structure and the collision radiuses (sigma) of all the Ir(iii) complexes has been investigated on the basis of the Demas model and the fundamental expression of luminescence quenching systems by oxygen. The ratio of collision radiuses are sigma(IrA1)/sigma(Ir(ppy)3) = 1.27 +/- 0.05, sigma(IrA2)/sigma(Ir(ppy)3) = 1.72 +/- 0.10, and sigma(IrA3)/sigma(Ir(ppy)3) = 2.13 +/- 0.07, respectively. The introduction and increase of TPA substituents can obviously increase the collision radiuses of cyclometalated Ir(iii) complexes which leading to potential oxygen sensitivity. And the incremental effect of collision radiuses caused by the introduction of TPA substituents resulted in outstanding oxygen sensitivity of IrA3. The results demonstrate for the first time evidence between molecular structure and oxygen sensitivity of the emitters for optical sensing.
资助项目	Liaoning Shihua University[2016XJJ-099] ; Liaoning Shihua University[2017XJJ-001] ; Department of Education Of Liaoning Province[L2017LQN007]
WOS关键词	LUMINESCENT OXYGEN ; PLATINUM(II) COMPLEXES ; PHOSPHORESCENCE ; EMITTERS ; DIFFUSION ; FRAMEWORK ; PROBES ; SBA-15
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000453551800063
资助机构	Liaoning Shihua University ; Liaoning Shihua University ; Department of Education Of Liaoning Province ; Department of Education Of Liaoning Province ; Liaoning Shihua University ; Liaoning Shihua University ; Department of Education Of Liaoning Province ; Department of Education Of Liaoning Province ; Liaoning Shihua University ; Liaoning Shihua University ; Department of Education Of Liaoning Province ; Department of Education Of Liaoning Province ; Liaoning Shihua University ; Liaoning Shihua University ; Department of Education Of Liaoning Province ; Department of Education Of Liaoning Province
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166402]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Li, Fayun; Xing, Yang
作者单位	1.Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Daoyuan,Li, Fayun,Di, Ling,et al. The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes[J]. RSC ADVANCES,2018,8(71):41040-41047.
APA	Zheng, Daoyuan,Li, Fayun,Di, Ling,Xing, Yang,Wang, Xiaoning,&Yang, Yang.(2018).The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes.RSC ADVANCES,8(71),41040-41047.
MLA	Zheng, Daoyuan,et al."The influence of molecular structure on collision radius for optical sensing of molecular oxygen based on cyclometalated Ir(iii) complexes".RSC ADVANCES 8.71(2018):41040-41047.