Verification of interfacial monolayer conformation of weakly hydrophilic diamide derivatives possessing a fluorocarbon-sandwiched hydrocarbon

Maruyama, Haruka; Mashiyama, Yuki; Kimura, Yusuke; Yajima, Tomoko; Fujimori, Atsuhiro

doi:10.1016/j.colsurfa.2020.125389

Cited by 2 publications

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“…The mechanism of the physical properties of the additive molecule is the formation of intergranular hydrogen bonds, the growth of crystalline nanofibers, the formation of a sponge-like organization due to the entanglement of nanofibers, and the gelation due to the inclusion of solvent molecules ( Figure S1(a)). [35][36][37][38] After external pressure is applied, the hydrogen bonding breaks, the nanofibers disappear, and reflow occurs. [39] The entanglement of nanofibers seems to be involved in efficient gelation.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Molecular Arrangement of Long‐chain Ferrocenyl Derivatives Having Asymmetric Carbon by Method of Organized Molecular Films and Formation of Its Helical Nanofibers

et al. 2021

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Formation of organized molecular film and helical nanofibers of ferrocene derivatives having R‐12‐hydroxystearyl chains with asymmetric carbon was investigated. The 12‐hydroxystearyl chain, which induces “thixotropy” due to the formation and breakage of intermolecular hydrogen bonds, was introduced into the ferrocenyl unit. The structure of this derivative as a monolayer on the water surface and its Langmuir‐Blodgett (LB) film properties were analyzed. The monolayer showed a two‐dimensional phase transition, corresponding to the formation of fibrous morphology. In the LB multilayers, intermolecular hydrogen bonding between hydroxyl groups at the 12‐position of the chain and crystalline packing was observed. Raman mapping revealed the difference in surface morphology of each derivative depending on the number of 12‐hydroxystearyl chains. The derivative having the single chain showed a right‐handed helical morphology in the film and this behavior is similar to those having two and three chains. In circular dichroism spectra, the film showed a positive Cotton effect. Since the helical chains easily entangle with each other to form a sponge‐like organization, it was expected that the solvent uptake was the origin of gelation induction to its contact solvent.

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