Polyelectrolyte Complexes Formed from Conjugated Polymers: Array‐Based Sensing of Organic Acids. Issue 10 (27th January 2016)

• Record Type: Journal Article
• Authors: Han, Jinsong; Bender, Markus; Hahn, Sebastian; Seehafer, Kai; Bunz, Uwe H. F.
• Is Part Of: Chemistry. Volume 22:Issue 10(2016)
• Page Start: 3230
• Page End: 3233
• Publication Date: 2016-01-27
• Subjects: carboxylic acids -- fluorescence -- linear discriminant analysis -- polymers -- poly(para-aryleneethynylene)s -- sensors; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201504447
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: One fluorescent, positively charged poly( para‐ phenyleneethynylene) (PAE 1 ) forms electrostatic complexes with five negatively charged pyridine‐ or benzothiadiazole‐containing poly( para ‐aryleneethynylene)s (PAE 2 –PAE 6 ). ThePAE 2 –PAE 6 are less fluorescent in water and act as quenchers forPAE 1 in their electrostatic complexesC 1 –C 5 ; the PAE‐complexes (2 μm ) were exposed to thirteen different carboxylic acids (50 mm ) in buffered aqueous solution. The fluorescence responses of the small library of electrostatic PAE–complexes towards the acids was analyzed; discrimination of all of the thirteen acids was achieved. The investigated acids include acetic, butyric, tartaric, maleic, lactic, sorbic, oxalic, aspartic, and citric acids. A random, simple, ad‐hoc library of electrostatic polymer complexes, C 1 –C 5, therefore discerns the thirteen carboxylic acids in water. Abstract : Disrupted ! Polyelectrolyte complexes formed from one cationic and five different anionic polymers of the poly( para‐ phenyleneethynylene) type have been examined as a new type of an array‐based sensor. Despite the lack of specific design efforts, this somewhat primitive system could be used to discern thirteen different carboxylic acids by subjecting the obtained fluorescence response patterns to linear discriminant analysis.