Synthesis, Characterization, and Potential Application of Cyclodextrin-Based Polyrotaxanes for Reinforced Atelocollagen Threads DOI Open Access
Riku Kubota, Ichiro Fujimoto

Polymers, Journal Year: 2023, Volume and Issue: 15(15), P. 3325 - 3325

Published: Aug. 7, 2023

Preparing strong and flexible atelocollagen-based materials for biomedical applications is still a challenging task. To address this challenge, study describes the synthesis characterization of water-soluble polyrotaxanes (PRs) with different coverage ratios molecular weights axle polymers, their potential PR-reinforced atelocollagen threads (PRATs). A novel method was established syntheses PRs relatively low ratio at sub-gram scale, in which aldehyde groups were employed as crosslinking sites preparing PRATs via reductive amination. The successfully quantified by 1H nuclear magnetic resonance spectroscopy using 1,1-dimethylhydrazine an marker. Fourier-transform infrared thermogravimetric analysis measurements supported PRs. Interestingly, tensile testing demonstrated that affected mechanical properties more strongly than weight. insights obtained would facilitate development soft based on atelocollagens

Language: Английский

Non-equilibrium Steady States in Catalysis, Molecular Motors, and Supramolecular Materials: Why Networks and Language Matter DOI Creative Commons
Ivan Aprahamian, Stephen M. Goldup

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(26), P. 14169 - 14183

Published: June 21, 2023

All chemists are familiar with the idea that, at equilibrium steady state, relative concentrations of species present in a system predicted by corresponding constants, which related to free energy differences between components. There is also no net flux species, matter how complicated reaction network. Achieving and harnessing non-equilibrium states, coupling network second spontaneous chemical process, has been subject work several disciplines, including operation molecular motors, assembly supramolecular materials, strategies enantioselective catalysis. We juxtapose these linked fields highlight their common features challenges as well some misconceptions that may be serving stymie progress.

Language: Английский

Citations

79
Electrochemical sensing mechanisms of neonicotinoid pesticides and recent progress in utilizing functional materials for electrochemical detection platforms DOI
Longhua Ding, Jiawei Guo, Shu Chen

et al.

Talanta, Journal Year: 2024, Volume and Issue: 273, P. 125937 - 125937

Published: March 16, 2024

Language: Английский

Citations

29
Kinetic Asymmetry and Directionality of Nonequilibrium Molecular Systems DOI
R. Dean Astumian

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(9)

Published: Jan. 18, 2024

Abstract Scientists have long been fascinated by the biomolecular machines in living systems that process energy and information to sustain life. The first synthetic molecular rotor capable of performing repeated 360° rotations due a combination photo‐ thermally activated processes was reported 1999. progress designing different intervening years has remarkable, with several outstanding examples appearing last few years. Despite accomplishments, there remains confusion regarding fundamental design principles which motions molecules can be controlled, significant intellectual tension between mechanical chemical ways thinking about describing machines. A thermodynamically consistent analysis kinetics rotors pumps shows while light driven operate power‐stroke mechanism, kinetic asymmetry—the relative heights barriers—is sole determinant directionality catalysis Power‐strokes—the depths wells—play no role whatsoever determining sign directionality. These results, elaborated using trajectory thermodynamics nonequilibrium pump equality, show asymmetry governs response many non‐equilibrium phenomena.

Language: Английский

Citations

23
Photofunctional cyclophane host–guest systems DOI
Swadhin Garain, Frank Würthner

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This feature article presents cyclophane-based host–guest complexes for which electronic interactions between the host and guest molecules can modulate excited-state properties in an advanced way involving both singlet triplet excited states.

Language: Английский

Citations

2
Photo-responsive functional materials based on light-driven molecular motors DOI Creative Commons
Yanping Deng, Guiying Long, Yang Zhang

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: March 1, 2024

Abstract In the past two decades, research and development of light-triggered molecular machines have mainly focused on developing devices at nanoscale. A key scientific issue in field is how to amplify controlled motion molecules nanoscale along multiple length scales, such as mesoscopic or macroscopic scale, a more practical perspective, convert into changes properties material. Light-driven motors are able perform repetitive unidirectional rotation upon irradiation, which offers unique opportunities for responsive systems. With several reviews that focus design, synthesis operation nanoscale, photo-responsive materials based light-driven not been comprehensively summarized. present review, we first discuss strategy confining absolute relative by grafting surfaces. Secondly, examples self-assemble supramolecular polymers with high internal order illustrated. Moreover, will building covalently linked system polymeric gels liquid crystals generate complex functions. Finally, perspective toward future developments given. This review helps us getting clear picture understanding movement can be programmed light-responsive systems man-made adaptive invented, serve an important guideline further design advanced materials.

Language: Английский

Citations

10
Bifunctional ligands in uranyl chemistry: Metalloligands and zwitterions DOI Creative Commons
P. Thuéry,

Jack Harrowfield

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 510, P. 215821 - 215821

Published: April 9, 2024

Structural studies of uranyl ion complexes metalloligands and zwitterions, ligand classes with some degree overlap, constitute a major contribution to more recent developments in uranium chemistry. To extent, they have been focussed on basic product characterization but generally gaining an understanding how particular features structure may influence the complete crystal thus potential for any applications. Metalloligands provide obvious means generating heterometallic since it is not always necessary preform metalloligand prior its interaction ion, can be identified by somewhat arbitrary excision appropriate components from very large number structures, so that only selected examples are considered here. Zwitterion (and oligozwitterion) complex structures treated comprehensively, two subclasses here being those where positive site aprotic protic, differing weak interactions involved. Association zwitterionic ligands classical, anionic polycarboxylates cucurbiturils covered extensively.

Language: Английский

Citations

10
Introduction of organo‐modified carbon nanotubes into fluoropolymer‐based hybrids containing polyrotaxane and cellulose nanofibers as organic fillers and their drawn orientation effects DOI Creative Commons

Pinjung Chu,

Chisato Nara,

Rokibul Hasan Rumon

et al.

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract The effect of drawn orientation on a polymer‐based composite containing two types functional organic fillers, organo‐modified single‐walled carbon nanotubes (SWCNTs), and trace amount dispersant was investigated. To improve the dispersion state SWCNTs in presence we introduced small fluorinated phosphonic acid addition to acid‐modified into polymer matrix. Fluorinated functioned as for polymer. However, thermal mechanical properties corresponding composites prepared by melt‐compounding did not necessarily improve. When uniaxially drawn, SWCNT aggregates were observed be oriented direction drawing. In addition, draw‐orienting process improved composites. Specifically, Young's modulus increased more than seven times when 7 times, reaching 251 MPa. Furthermore, terms elongation properties, strain value reached 78%, nearly four original value, 5 times. Highlights Carbon attained introduce fillers. Surface modification (SWCNTs) effective nanohybridization. Mechanical improved. about 4

Language: Английский

Citations

1
Synthesis of ‘Impossible’ Rotaxanes DOI Creative Commons
Adrián Saura-Sanmartín

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(19)

Published: Jan. 3, 2024

'Impossible' rotaxanes, which are constituted by interlocked components without obvious binding motifs, have attracted the interest of mechanically molecules (MIMs) community. Within synthetic efforts reported in last decades towards preparation MIMs, some innovative protocols for accessing 'impossible' rotaxanes been developed. This short review highlights different selected examples as well suggests future directions this research area.

Language: Английский

Citations

7
Artificial molecular pumps DOI
Long Zhang, Huang Wu, Xuesong Li

et al.

Nature Reviews Methods Primers, Journal Year: 2024, Volume and Issue: 4(1)

Published: Feb. 22, 2024

Language: Английский

Citations

7
Polyrotaxane‐Based Functional Materials Enabled by Molecular Mobility and Conformational Transition† DOI

Qinke Cui,

Xinxing Zhang

Chinese Journal of Chemistry, Journal Year: 2023, Volume and Issue: 41(20), P. 2715 - 2729

Published: May 22, 2023

Comprehensive Summary Slide‐ring structured polyrotaxanes with high molecular mobility and reversible conformational transition ability can achieve performance multifunctionality of the material in various applications. There have been many reviews describing advances research rotaxanes polyrotaxanes. However, most them typically focus on precise synthesis mechanically interlocked molecules control microscopic shuttles. In this review, we examine effects motion activity due to slide latest functional Different designs polyrotaxane‐based materials are presented improve potential for applications including self‐healing stretchable elastomers/gels, stimuli‐responsive smart devices, battery electrode binders, biomedical drug delivery. It is anticipated that review will provide insights guidance future developments design, application materials.

Language: Английский

Citations

15