Surface morphology and molecular aggregation state of the organized molecular films of cyclic moiety-containing polyguanamine derivatives with a flexible linker moiety

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

“…In previous research, the origin of this collection of metal ions was estimated to be the weak interaction between positive metal ions and the abundant negative electric field derived from the lone pair of electrons of the N element facing the ring. [20][21][22][23][24] This is the same mechanism of complex formation between 18-crown-6 as crown ethers and K + ions. 38 Furthermore, in a previous study, changes in the cup angle inclination of the azacalixarene ring were observed before and after metal collection.…”

“…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.…”

“…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.…”

“…23 The chemical structure and intermolecular interactions of the linker moiety attached to the azacalixarene ring affect the properties and metal-trapping ability of the resultant interfacial film. 24 Recently, a copolymer that exhibits crystallinity in the bulk state and can form giant spherulites was created for the first time by changing the linker moiety attached to the azacalixarene ring to a polyethylene glycol (PEG) chain. 25 Evaluations of the arrangement and packing state of the two-dimensional film formed by this compound at the air/water interface and whether two-dimensional film of this compound has metaltrapping ability will confirm whether this copolymer is suitable for practical and widespread use.…”

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

“…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.…”