Chromogenic anion receptors based on 4-nitrophenylhydrazone and phenylhydrazone

Autor:	Jongmin Kang, Yusun Choi
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Hydrogen bond Chemistry Iodide General Chemistry Condensed Matter Physics Photochemistry Chloride Medicinal chemistry chemistry.chemical_compound Deprotonation Bromide medicine Titration sense organs Naked eye Fluoride Food Science medicine.drug
Zdroj:	Journal of Inclusion Phenomena and Macrocyclic Chemistry. 79:95-102
ISSN:	1573-1111 1388-3127
DOI:	10.1007/s10847-013-0328-8
Popis:	Chromogenic anion receptors based on 4-nitrophenylhydrazone and phenylhydrazone have been designed and synthesized. UV–Vis and 1H NMR titration showed that receptor 1 responded to anions according to their basicity. Although the nature of hydrogen bonds in hydrazone N–H and vinylic C–H is weak, receptor 1 bound weakly basic anions such as chloride, bromide, iodide and hydrogen sulfate utilizing only hydrogen bond in CH3CN. No color change was observed with these anions. However, for more basic anions such as acetate dihydrogen phosphate and fluoride, color change due to deprotonation observed. Furthermore, the solution color of 1 changed to deep blue with fluoride. Fluoride could be distinguished from acetate and dihydrogen phosphate with naked eye. However, phenylhydrazone based receptor 2 showed only hydrogen bonding association with all anions investigated except fluoride. Due to low deprotonation tendency and its structure, color change of solution 2 was not observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5bf94e67e01ebe2052195c73a5333dfe https://doi.org/10.1007/s10847-013-0328-8 Zobrazit plný text záznamu Full text from SpringerLink