Chirality-directed organogel formation

Kostyanovsky, Remir G.; Lenev, Denis A.; Krutius, O. N.; Stankevich, Andrey A.

doi:10.1070/mc2005v015n04abeh002136

Cited by 32 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pure R-enantiomer of the seventh member of the homologous series of trifluoroacetylated α-amino alcohols (TFAAA-7R, Figure 1) was synthesized according to the procedure described earlier. 22 Glycerol (Khimmed, Russia) was heated to a temperature of 60-70 ∘ C and mixed with TFAAA-7R powder under stirring (final concentration 10 mg/mL). After the dissolution of TFAAA, 15μL of the hot solution was dropped onto the surface of the glass slide and covered with a coverslip (the gap was $ 0:5 mm).…”

Section: Methodsmentioning

confidence: 99%

Triggering gel‐sol transition by weak magnetic field

et al. 2023

View full text Add to dashboard Cite

The self‐assembly of small and always chiral molecules into fiber‐like structures is a mysterious process, as the physics underlying such self‐assembly is unclear. The energy necessary for this process exceeds the one provided by common dispersion interactions and hydrogen bonding. The recent results obtained by the scientific group of Prof. Naaman from the Weizmann Institute of Science fed light on the nature of forces providing for the self‐assembly of chiral molecules and attributed these forces to spin‐exchange interactions. Therefore, the self‐assembly of chiral molecules should be magneto‐sensitive. We found such sensitivity in solutions of trifluoroacetylated ‐amino alcohols, and the process was inhibited by the magnetic field when fibers grew on the surface of the substrate. On the contrary, in bulk, the self‐assembly was enhanced by the magnetic field and led to the formation of a dense gel, while no gelation was observed in the absence of the external magnetic field. The latter observations are the theme of this short report, aimed to declare the effect itself but not pretend to describe it in full.

show abstract

Section: Methodsmentioning

confidence: 99%

Triggering gel‐sol transition by weak magnetic field

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Pure R-enantiomer of seventh member of the homologous series of trifluoroacetylated α-aminoalcohols (TFAAA-7R, Fig. 2) was synthesized according to the procedure described earlier 28 . Glycerol (Khimmed, Russia) was heated to a temperature 4/7 of 60-70 • C and mixed with TFAAA-7R powder under stirring (final concentration 10 mg/ml).…”

Section: Methodsmentioning

confidence: 99%

Triggering Gel-Sol Transition by Weak Magnetic Field

Стовбун

Zanin

Скоблин

et al. 2023

Preprint

View full text Add to dashboard Cite

The self-assembly of small molecules into fiber-like structures is a mysterious process as the physics underlying such self-assembly is not clear. The energy necessary for this process exceeds the one provided by common dispersion interactions and hydrogen bonding. The recent results obtained by the scientific group of Prof. Naaman for the Weizmann Institute of Science fed light on the nature of the forces providing for the self-assembly of chiral molecules and attributed these forces to the spin exchange interactions. Therefore, the self-assembly of chiral molecules should be magneto-sensitive. We found such sensitivity in solutions of trifluoroacetylated alpha-aminoalcohols, and the process was inhibited by the magnetic field when fibers grew on the surface of the substrate. On the contrary, in the bulk, the self-assembly was enhanced by the magnetic field and led to the formation of the dense gel, while no gelation was observed in the absence of the external magnetic field. The latter observations are the theme of this short report aimed to declare the effect itself but does not pretend to describe it in full.

show abstract

“…TFAAA molecules were synthesized as described earlier. 14,29 Solutes were purchased from Chimmed (Moscow, Russia).…”

Section: Methodsmentioning

confidence: 99%