Ag-selective nanotubes based on bisthiacalix[4]arene with ethylene sulfide bridges

Muravev, Anton A.; Trushina, Ekaterina; Yakupov, Ayrat; Solovieva, S. E.; Антипин, И. С.

doi:10.31857/s0869-56524875515-518

Cited by 1 publication

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References 7 publications

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“…Analysis of PSD showed the connectivity of aggregation phenomena with metal ion extraction by amphiphilic calixcrowns and agrees with literature data on Am 3+ and Cs + selective calix[8]arenes [ 41 ] and Ag + -selective thiacalixtubes [ 42 ]. In spite of insufficient data set to establish the mechanism of picrate extraction, the results of DLS in the aqueous phase suggest nonspecific inclusion of metal picrates to calixcrown aggregates, which leads to their nonzero extractability.…”

Section: Resultssupporting

confidence: 88%

Switching Ion Binding Selectivity of Thiacalix[4]arene Monocrowns at Liquid–Liquid and 2D-Confined Interfaces

Muravev

Yakupov

Gerasimova

et al. 2021

IJMS

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Understanding the interaction of ions with organic receptors in confined space is of fundamental importance and could advance nanoelectronics and sensor design. In this work, metal ion complexation of conformationally varied thiacalix[4]monocrowns bearing lower-rim hydroxy (type I), dodecyloxy (type II), or methoxy (type III) fragments was evaluated. At the liquid–liquid interface, alkylated thiacalixcrowns-5(6) selectively extract alkali metal ions according to the induced-fit concept, whereas crown-4 receptors were ineffective due to distortion of the crown-ether cavity, as predicted by quantum-chemical calculations. In type-I ligands, alkali-metal ion extraction by the solvent-accessible crown-ether cavity was prevented, which resulted in competitive Ag+ extraction by sulfide bridges. Surprisingly, amphiphilic type-I/II conjugates moderately extracted other metal ions, which was attributed to calixarene aggregation in salt aqueous phase and supported by dynamic light scattering measurements. Cation–monolayer interactions at the air–water interface were monitored by surface pressure/potential measurements and UV/visible reflection–absorption spectroscopy. Topology-varied selectivity was evidenced, towards Sr2+ (crown-4), K+ (crown-5), and Ag+ (crown-6) in type-I receptors and Na+ (crown-4), Ca2+ (crown-5), and Cs+ (crown-6) in type-II receptors. Nuclear magnetic resonance and electronic absorption spectroscopy revealed exocyclic coordination in type-I ligands and cation–π interactions in type-II ligands.

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Section: Resultssupporting

confidence: 88%

Switching Ion Binding Selectivity of Thiacalix[4]arene Monocrowns at Liquid–Liquid and 2D-Confined Interfaces

Muravev

Yakupov

Gerasimova

et al. 2021

IJMS

View full text Add to dashboard Cite

show abstract

Ag-selective nanotubes based on bisthiacalix[4]arene with ethylene sulfide bridges

Abstract: An approach to a new type of molecular nanotubes based on bisthiacalix[4]arene with ethylene sulfide bridges in cone stereoisomeric form has been suggested and implemented. This ligand has shown selective liquid-phase extraction of Ag+.

Cited by 1 publication

References 7 publications

Switching Ion Binding Selectivity of Thiacalix[4]arene Monocrowns at Liquid–Liquid and 2D-Confined Interfaces

Switching Ion Binding Selectivity of Thiacalix[4]arene Monocrowns at Liquid–Liquid and 2D-Confined Interfaces

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