Protonation activates anion binding and alters binding selectivity in new inherently fluorescent 2,6-bis(2-anilinoethynyl)pyridine bisureas.
نویسندگان
چکیده
A new class of 2,6-bis(2-anilinoethynyl)pyridine-based bisureas forms 1 : 1 complexes with halides; protonation enhances binding by over one order of magnitude, alters the binding selectivity, and provides a colorimetric indication of anion binding.
منابع مشابه
Synthesis and optoelectronic properties of 2,6-bis(2-anilinoethynyl)pyridine scaffolds.
A series of sixteen bisphenylureas based on a 2,6-bis(2-anilinoethynyl)pyridine scaffold have been synthesized for use as potential anion sensors. Prior work with one of these receptors revealed a distinct fluorescence response in the presence of a suitable anion source with specificity towards chloride anion. This study demonstrates that the fluorescent properties of these receptors can be tun...
متن کاملSynthesis and solid-state structures of a macrocyclic receptor based on the 2,6-bis(2-anilinoethynyl)pyridine scaffold† †Electronic supplementary information (ESI) available: Experimental details, spectroscopic data and X-ray analysis of receptor. CCDC 968267 & 968268. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/ccce42307g Click here for additional data file. Click here for additional data file.
A fluorescent macrocyclic anion receptor based on the 2,6-bis(2-anilinoethynyl)pyridine scaffold has been synthesized to investigate the mechanism of fluorescence quenching in this class of compounds. X-ray crystallography reveals that the binding pocket of the receptor is a natural host to both H2O and HCl, accommodating either molecule in nearly identical environments. Our studies show that p...
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ورودعنوان ژورنال:
- Chemical communications
دوره 18 شماره
صفحات -
تاریخ انتشار 2009