title: Re(I) complex doped nanofibers for oxygen optical sensing.
abstract: In this paper, we design and synthesize a novel diamine ligand of PTO (2-(pyridin-2-yl)-5-p-tolyl-1,3,4-oxadiazole). The crystal structure, photophysical character and electronic nature of its corresponding Re(I) complex of Re(CO)(3)(PTO)Br have been investigated in detail. Experimental data and theoretical calculation suggest that Re(CO)(3)(PTO)Br owns a long-lived yellow phosphorescence which is sensitive towards molecular oxygen. By doping Re(CO)(3)(PTO)Br into a polymer matrix of polystyrene (PS), the emission response of the resulted composite nanofibers towards molecular oxygen is studied. The optimal sample with mean diameter of 600 nm shows a maximum sensitivity of 4.14 with short response time of 14s (here sensitivity is defined as the ratio of emission intensity in pure N(2) atmosphere to that in pure O(2) atmosphere). The composite nanofibers are also found to be photostable enough to experience UV radiation.
authors.affiliation: Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, PR China.
authors.forename: He
authors.initials: H
authors.lastname: Hong
authors.forename: Long
authors.initials: L
authors.lastname: Zhu
authors.forename: Aofang
authors.initials: A
authors.lastname: Wang
authors.forename: Hongwei
authors.initials: H
authors.lastname: Lu
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003959:Diamines / Q000737:chemistry; D008024:Ligands; D008163:Luminescent Measurements / Q000379:methods*; D008958:Models, Molecular; D057139:Nanofibers / Q000737:chemistry*; D010069:Oxadiazoles / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis*; D011137:Polystyrenes / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry; D012211:Rhenium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D003959:Diamines; D008024:Ligands; D010069:Oxadiazoles; D011137:Polystyrenes; D011725:Pyridines; D012211:Rhenium; D010100:Oxygen