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6606364 
Journal Article 
Development of optical fiber O2 sensor based on new lipophilic fluorescence compounds 
Lu, T; Stefan, R; Spichiger, UE 
1997 
0 
Huaxi Yike Daxue Xuebao / Journal of West China University of Medical Sciences
ISSN: 0257-7712 
28 
4 
412-416 
Chinese 
BCI:BCI199800070743 
For increasing lifetime of sensitive membrane of fiber optic oxygen sensor, the highly lipophilic derivatives of the 4,7-diphenyl-1,10-phenanthroline ligand by alkylating the phenyl were firstly synthesized. With their Ru (II) complexes the homogenous poly (styrene) membranes were prepared and the membrane characteristics for Ru (II) (diphphen)3 (ClO4)2 derivatives (substituent R = 0, 3, 7,) were compared. The experiments showed that the fluorescent response behaviour of three kinds of membranes for O2 was reversible, and Stern-Volmer plots were linear in the range of 0%-20% O2. The longer the side chain of substituent in ligand lengthened, the shorter the response to dissolved O2 persisted, and the little the leaching of fluorescence compound came off. Therefore the expected lifetime of the membrane should be longer. 
Diphenyl-1,10-phenanthroline derivatives; Fluorescence compound; Optical fiber oxygen sensor; Ruthenium(I)-complexes