Łukasik N, Wagner-Wysiecka E. Anion binding by p-aminoazobenzene-derived aromatic amides: spectroscopic and electrochemical studies.
Photochem Photobiol Sci 2018;
16:1570-1579. [PMID:
28884766 DOI:
10.1039/c7pp00245a]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The synthesis and complexing properties of p-aminoazobenzene-derived mono-, bis-, and trisamides were described. Ligands 3 and 4 bind anions, including fluorides, chlorides, bromides, acetates, benzoates, dihydrogen phosphates, hydrogen sulfates, and p-toluenesulfonates, in chloroform forming 1 : 1 complexes. The highest value of stability constant was evaluated for the 4-F- complex (log K = 5.63 ± 0.21). On the basis of 1H NMR, and FTIR spectroscopy, the possible nature of the ligand-anion interactions was proposed. The E ⇄ Z isomerization process of tripodal amide 4 in chloroform was studied. The effect of anions on Z to E thermal back isomerization was investigated.
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