摘要
An organically modified silicate (ORMOSIL) as a matrix for oxygen-sensitive sensor, in which di-methyldimethoxysilane was selected as an organic modifier in the precursor, is described. The sensing film with tris-(4,7-diphenyl-1,10-phenanthroline) ruthenium(II) as an indicator developed in this paper was characterized by efficient quenching by oxygen. Blue light-emitting diodes (λmax = 475 nm) were employed as light excitation source. The linear range of the dissolved oxygen was from 0.5 to 16 μg/mL. The measured RSD was 2%, the response time (t95) was 60 s, and the determination limit was 0.2 μg/mL. A portable and inexpensive luminescence-based sensor was established and applied to the determina-tion of dissolved oxygen in the surface water.
An organically modified silicate （ORMOSIL） as a matrix for oxygen-sensitive sensor, in which dimethyldimethoxysilane was selected as an organic modifier in the precursor, is described. The sensing film with tris-（4,7-diphenyl-1,10-phenanthroline） ruthenium（Ⅱ） as an indicator developed in this paper was characterized by efficient quenching by oxygen. Blue light-emitting diodes （λmax = 475 nm） were employed as light excitation source. The linear range of the dissolved oxygen was from 0.5 to 16 ug/mL. The measured RSD was 2%, the response time （t95） was 60 s, and the determination limit was 0.2 pg/mL. A portable and inexpensive luminescence-based sensor was established and applied to the determination of dissolved oxygen in the surface water.
基金
the Natural High Technical Development Project (863 project) Foun-dation (Grant No. 200516)
the Program for New Century Excellent Talents in Uni-versity of China (NCET)
the Natural Scientific Foundation of Fujian (Grant No. D0410001)
关键词
改性有机硅
钌
邻二氮杂菲
发光
ORMOSIL, fluorescent quenching, oxygen sensing film, ruthenium complex
