Luminescence Oxygen Sensor Based on a Ruthenium(II) Star Polymer Complex

摘要

A novel quenchometric oxygen sensor based on a lownpolydispersity (PDI) star polymer [Ru(bpyPS2)3](PF6)2n(bpy ) 2,2′-bipyridine, PS ) polystyrene) is reported.nThe synthesis, characterization, photophysics, andnoxygen sensing properties are examined. Combiningnthe polystyrene support with the oxygen sensing rutheniumncomplex provides much higher doping levelsnwithout microcrystallization of the complex than traditionalntwo-component sensors. The single moleculenapproach also avoids sensor leaching. While the polydispersitynwas 1.10, indicating a very tight distributionnof molecular weights, sensor heterogeneity was notncompletely eliminated, as the luminescence decaysnwere still multiexponentials. The likely source of thisnheterogeneity and possible methods for generatingnmore homogeneous materials are discussed.