Fabrication of organically modified oxygen sensing film based on fluorescent quenching  

作　　者：XIN LingLing XIAO LaiLong ZHAO Li CHEN Xi WANG XiaoRu 

机构地区：[1]Department of Chemistry and the Key Laboratory of Analytical Sciences of Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China [2]State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China

出　　处：《Chinese Science Bulletin》2007年第2期188-193,共6页

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)

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.

关 键 词：改性有机硅 钌 邻二氮杂菲 发光 

分 类 号：O614.821[理学—无机化学]