title: Composite nanofibers doped with a phosphorescent Re(I) complex having restricted conjugation plane in its diamine ligand: preparation, characterization, photophysical property and oxygen-sensing performance.
abstract: In this paper, we report a Re(I) complex of Re(CO)3(Cl-PYO)Br, where Cl-PYO stands for 2-(4-chlorophenyl)-5-(pyridin-2-yl)-1,3,4-oxadiazole, including its synthesis, identification, molecular structure, theoretical calculation and photophysical character. Re(CO)3(Cl-PYO)Br is found to be a yellow emitter with long excited state lifetime in pure N2 atmosphere. Theoretical calculation result suggests that this emission comes from a triplet metal-to-ligand-charge-transfer excited state. By doping Re(CO)3(Cl-PYO)Br into a polymer supporting matrix of poly(vinylpyrrolidone), the emission of the resulted composite materials is found to be sensitive towards various oxygen concentrations. The maximum sensitivity is obtained to be 7.88. Owing to the porous structure of fibrous poly(vinylpyrrolidone) matrix, a short response time of 11s towards molecular oxygen is also realized with high photostability.
authors.affiliation: School of Chemical Engineering, University of Science and Technology LiaoNing, Anshan 114051, China. anshan_chenlin@163.com
authors.forename: Chen
authors.initials: C
authors.lastname: Lin
authors.forename: Wang
authors.initials: W
authors.lastname: Shaoyan
authors.forename: Wang
authors.initials: W
authors.lastname: Qi
authors.forename: Li
authors.initials: L
authors.lastname: Jing
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003959:Diamines / Q000737:chemistry*; D008024:Ligands; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D008958:Models, Molecular; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D010069:Oxadiazoles / Q000737:chemistry; D010100:Oxygen / Q000032:analysis*; D011205:Povidone / Q000737:chemistry; D012211:Rhenium / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D056831:Coordination Complexes; D003959:Diamines; D008024:Ligands; D049408:Luminescent Agents; D010069:Oxadiazoles; D012211:Rhenium; D011205:Povidone; D010100:Oxygen
keywords: Oxygen sensing; Photophysical performance; Re(I) complex; Single crystal