Interfacial films of cyclic polyguanamine derivatives for metal capturing: Selectivity and fluorescence emission properties

Yamaguchi, Junto; Otsuki, Yuto; Tsukamoto, Tadashi; Shibasaki, Yuji; Fujimori, Atsuhiro

doi:10.1016/j.colsurfa.2022.129976

Cited by 5 publications

(13 citation statements)

References 32 publications

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“…A diffraction peak appears at 4.1 Å, and it is sharp before Cd 2+ action and becomes broad after Cd 2+ action. Figure S2 reveals that this trend is slightly different from that of low‐molecular‐weight linker derivatives in previous studies 20–24 …”

Section: Resultsmentioning

confidence: 56%

“…In terms of the surface morphology, for this type of compound, the formation of dot‐like projections was predicted to correspond to crystallinity. Previous studies on this system have covered a wide range of issues, including the desorption properties and capture selectivity of captured metals, 23 and we hope that this compound can be used in future applications as a material for collecting rare elements. However, this research is only reported in the category of basic research.…”

Section: Discussionmentioning

confidence: 99%

“…One feature is that dot-like domain shapes are observed on the surfaces of all the single-layer films. In previous studies, [20][21][22][23][24][25] surface morphology was divided into two systems. As shown in Figure S1, an extremely homogeneous surface is formed on amorphous films with low-molecular-weight aliphatic chains as linkers.…”

Section: Formation Of Interfacial Molecular Film In Azacalixarene-bas...mentioning

confidence: 99%

“…Figure S2 reveals that this trend is slightly different from that of low-molecular-weight linker derivatives in previous studies. [20][21][22][23][24] In the case of aromatic linkers, the diffraction peaks in the 4.1-4.2 Å region are somewhat fine or in the category of halo patterns. No in-plane diffraction peaks are observed for the aliphatic linkers, indicating that they are amorphous.…”

Section: Packing and Molecular Arrangement Of Interfacial Molecular F...mentioning

confidence: 99%

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Formation of interfacial molecular film and metal‐trapping function of azacalixarene‐containing copolymers having spherulite‐forming ability

Otsuki,

Terui,

Shibasaki

et al. 2024

Polymer Engineering & Sci

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The interfacial molecular film behavior of a newly synthesized copolymer having spherulite‐forming ability and consisting of an azacalixarene moiety and a polyethylene glycol linker was investigated. Furthermore, the ability of the azacalixarene ring in the copolymer Langmuir monolayer to trap metals from the subphase was examined. The copolymer formed a monolayer at the air/water interface with high‐density packing. In addition, the corresponding copolymer formed a stable interfacial monolayer whose behavior did not change significantly as the temperature of the subphase changed. The monolayer morphology exhibited a dot‐like crystalline domain. When the subphase contained cadmium ions, the cyclic moiety showed the ability to trap the metal cations. In this case, the distortion angle of the cup‐shaped conformation of the cyclic moiety in the organized molecular film expanded after metal trapping.Highlights LB film of a copolymer containing azacalixarene and PEG units was prepared. The copolymer formed a dense packing in the LB film. Copolymer film formed a surface morphology containing crystalline grains. The copolymer trapped Cd ions in the azacalixarene ring from the subphase. Due to trapping of Cd ions, the distortion angle of the ring widened by 7°.

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Section: Resultsmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Formation Of Interfacial Molecular Film In Azacalixarene-bas...mentioning

confidence: 99%

Section: Packing and Molecular Arrangement Of Interfacial Molecular F...mentioning

confidence: 99%

See 2 more Smart Citations

Formation of interfacial molecular film and metal‐trapping function of azacalixarene‐containing copolymers having spherulite‐forming ability

Otsuki,

Terui,

Shibasaki

et al. 2024

Polymer Engineering & Sci

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“…Metal scavenging properties were investigated by utilizing monolayers on water surfaces [28] and Langmuir-Blodgett (LB) films [29][30][31] of polyguanamine derivatives with s-triazine-ring-containing azacalixarene moieties (Figure 1b). [32][33][34][35] In other words, understanding and controlling the interactions and structural formation induced by the azacalixarene moiety are expected to facilitate the exploration of various functions, including the mechanical properties and encapsulation ability of polymers containing azacalixarene moieties.…”

Section: Introductionmentioning

confidence: 99%

Spherulitic Characterization and Hierarchical Structural Evaluation of Azacalixarene‐Polyethylene Glycol Copolymers Containing s‐Triazine Rings

Otsuki,

Terui,

Hoshino

et al. 2023

Macro Chemistry & Physics

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This study investigates the solid‐state structure of a copolymer composed of polyethylene glycol (PEG) and azacalixarene, which has two s‐triazine rings and two phenyl rings alternately crosslinked by amino groups. Azacalixarene derivatives containing a low‐molecular‐weight linker moiety and exhibiting an amorphous structure have been synthesized in previous studies; however, in this study, they are crystallized by the substitution of the linker moiety with PEG. The spherulites formed by the corresponding copolymer possess the ability to form higher‐order structures, growing up to a diameter of 1.7 mm depending on the crystallization conditions. The azacalixarene‐PEG copolymer forms negative spherulites via homogeneous nucleation and exhibits a lamellar period at 13.8 nm. The lamellar crystalline part itself is 5.8 nm in thickness; bulky amorphous regions are also observed in the copolymer structure. Reciprocal lattice analysis results reveal that the crystal parts form a packing structure similar to the crystal lattice of PEG. The promotion of spherulite growth is predicted to reflect the characteristics of the corresponding copolymer, which crystallizes while universally containing many amorphous regions.

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Metal capture and desorption abilities of two types of organized films of polyguanamine derivatives with cyclic moiety and bulky or flexible linkers

Yamaguchi

Sugita

Otsuki

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Interfacial films of cyclic polyguanamine derivatives for metal capturing: Selectivity and fluorescence emission properties

Cited by 5 publications

References 32 publications

Formation of interfacial molecular film and metal‐trapping function of azacalixarene‐containing copolymers having spherulite‐forming ability

Formation of interfacial molecular film and metal‐trapping function of azacalixarene‐containing copolymers having spherulite‐forming ability

Spherulitic Characterization and Hierarchical Structural Evaluation of Azacalixarene‐Polyethylene Glycol Copolymers Containing s‐Triazine Rings

Metal capture and desorption abilities of two types of organized films of polyguanamine derivatives with cyclic moiety and bulky or flexible linkers

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