Monovalent Anion Indicator Based on Fluorescence Quenching of Helical Fluorinated Poly(dialkylsilanes)

This paper reports that fluorinated PSis with 3,3,3-trifluoropropyl and linear alkyl side chains (F-PSi)s demonstrated monovalent anion size dependent fluorescence quenching, which has potential as a novel type of chemosensor, “monovalent anion indicator”. The extent of the fluorescent quenching was...

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Bibliographic Details
Published inMacromolecules Vol. 43; no. 19; pp. 7919 - 7923
Main Authors Naito, Masanobu, Nakamura, Masashi, Terao, Ken, Kawabe, Takuma, Fujiki, Michiya
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 12.10.2010
Subjects
Applied sciences
Exact sciences and technology
Inorganic and organomineral polymers
Physicochemistry of polymers
Properties and characterization
Stern Volmer diagram
Substituent effect
Fluorine containing polymer
Fluorescence
Polysilane
Fluorides
Chemical sensor
Experimental study
Organic solution
Conjugated polymer
Monodispersed polymer
Sensitivity
Monovalent anion
Luminescence quenching
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Summary:This paper reports that fluorinated PSis with 3,3,3-trifluoropropyl and linear alkyl side chains (F-PSi)s demonstrated monovalent anion size dependent fluorescence quenching, which has potential as a novel type of chemosensor, “monovalent anion indicator”. The extent of the fluorescent quenching was linearly increased by a decrease in the surface charge density of the monovalent anions. In addition, sensitivity toward monovalent anions was modulated by choosing an adequate length of linear alkyl chains, which efficiently served as a soft but strict molecular sieve for the monovalent anions. In contrast, nonfluorinated PSi did not show such an ability to discriminate monovalent anions, suggesting that the positively charged Si main chain stimulated the electrostatic interaction with monovalent anions.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma1011304