Polymer-Supported pH Sensors Based on Hydrophobically Bound Luminescent Ruthenium(II) Complexes

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• 作者：Jason M. Price ; Wenying Xu ; J. N. Demas ; and B. A. DeGraff
• 刊名：Analytical Chemistry
• 出版年：1998
• 出版时间：January 15, 1998
• 年：1998
• 卷：70
• 期：2
• 页码：265 - 270
• 全文大小：76K
• 年卷期：v.70,no.2(January 15, 1998)
• ISSN：1520-6882

文摘

A new luminescence intensity-based sensor-polymer support system is described. The pH-sensitive element is[Ru(phen)₂[phen(OH)₂]]²⁺or[Ru(Ph₂phen)₂[phen(OH)₂]]²⁺ (phen =1,10-phenanthroline, Ph₂phen = 4,7-diphenyl-1,10-phenanthroline, and phen(OH)₂ =4,7-dihydroxy-1,10-phenanthroline) immobilized on apolymerbuilt from a four-function cyclic methyl siloxane ringpolymer having (SiRCH₃O)₄ units withpoly(ethyleneoxide) cross-linkers. Hydrophobic binding of thesensorto the polymer is used to avoid the need for covalentchemistry. These sensor systems have a usablesensitivityover the 2-8 pH range, but are most usable in the 2-6pH range. Response times for thick films (250 M)arerapid (several minutes).