Journal
MACROHETEROCYCLES
Volume 10, Issue 2, Pages 226-232Publisher
IVANOVO STATE UNIV CHEMICAL TECHNOLOGY
DOI: 10.6060/mhc170511s
Keywords
Pillar[5]arene; synthesis; molecular recognition; heterocycle; macrocycle
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Funding
- Russian Scientific Fond [17-13-01208]
- Russian Science Foundation [17-13-01208] Funding Source: Russian Science Foundation
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Pillar[5]arenes bearing amide and carboxylic groups have demonstrated recognition performance for some representative alkali metal ions including Li+, Na+, K+ and Cs+ in series cations of s- and d-metals compared to pillar[5]arenes with hydroxyl, methoxy and acetone fragments. Their complexation abilities toward these cations were evaluated by UV-Vis technique. The complexation results revealed that pillar[5]arene, containing glicylglicyne groups, were the most efficient cation receptors for Li+, Na+, K+ and Cs+ over other synthesized and studied pillar[5]arenes. Introduction of long glycylglycide fragments into macrocycle structure allowed to increase the association constant logarithm in the case of L-i+ by 2 orders. In addition, in the set of macrocycles, incorporation of the additional amide fragments and carboxyl group into macrocycle structure leads to increasing the binding efficiency with alkali metal cations.
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