title: A green-emitting Cu complex for oxygen-sensing purpose: synthesis, characterization and photophysical features.
abstract: In the present work, a green-emitting Cu(I) complex [Cu(BT-Et)(POP)]BF4 was synthesized and fully characterized, where BT-Et=4-(1-ethyl-1H-benzo[d]imidazol-2-yl)thiazole, POP=bis(2-(diphenylphosphanyl)phenyl) ether, respectively. An ethyl group was connected onto the diamine ligand to breach π-π attraction within solid [Cu(BT-Et)(POP)]BF4, favoring O2 molecule attack and sensitivity improvement. Its molecular identity was confirmed by single crystal analysis and theoretical calculation. [Cu(BT-Et)(POP)]BF4 emitted long-lived green emission peaking at 521nm upon photoexcitation which was vulnerable towards O2 molecule, making itself a potential oxygen sensing material. [Cu(BT-Et)(POP)]BF4 was then doped into a silica supporting matrix MCM-41. The resulting composite samples showed sensing behavior towards O2 molecule, with short response time of 10s and sensitivity of 5.56.
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
authors.forename: Han
authors.initials: H
authors.lastname: Hui
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wei
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Zhentao
authors.affiliation: School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China. Electronic address: hh80235@163.com.
authors.forename: Han
authors.initials: H
authors.lastname: Xiangen
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D010100:Oxygen / Q000032:analysis*; D010647:Phenyl Ethers / Q000138:chemical synthesis / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013844:Thiazoles / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; C509968:MCM-41; D010647:Phenyl Ethers; D013844:Thiazoles; D012822:Silicon Dioxide; D003300:Copper; D010100:Oxygen
keywords: Cu(I) complex; MCM-41; Oxygen-sensing; Photophysical features; Single crystal