title: A selective chromogenic chemosensor for carboxylate salt recognition.
abstract: A new heteroditopic chromogenic chemosensor bearing a crown ether substituted at the intraannular position with a nitrophenylthiourea moiety has been synthesized. The binding behavior of this sensor was investigated by (1)H NMR spectroscopy and UV-vis spectroscopy. The receptor binds in a cooperative fashion to both a potassium cation and a carboxylate anion whereas a sodium cation sequesters an anion from the anion-receptor complex. The binding events are confirmed by selective color changes of the chemosensor solution.
authors.affiliation: Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland. ppiatek@chem.uw.edu.pl
authors.forename: Piotr
authors.initials: P
authors.lastname: Piątek
mesh_terms: D015374:Biosensing Techniques; D002264:Carboxylic Acids / Q000737:chemistry*; D002863:Chromogenic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D043844:Crown Ethers / Q000737:chemistry; D015394:Molecular Structure; D012492:Salts / Q000737:chemistry; D013890:Thiourea / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D002264:Carboxylic Acids; D002863:Chromogenic Compounds; D043844:Crown Ethers; D012492:Salts; D013890:Thiourea