Article
Chemistry, Physical
Ramasamy Kandasamy Sankaranarayanan, Govindaraj Venkatesh, Jayashree Ethiraj, Mahesh Pattabiraman, Kandasamy Saravanakumar, Ganesan Arivazhagan, Ramasamy Shanmugam, Narayanasamy Rajendiran
Summary: This study investigates the inclusion complex of Fast Violet B and cyclodextrins into pseudopolyrotaxane nanorods through supramolecular self-assembly. Experimental results suggest that the formation of the complex is enthalpy-entropy driven process. Various analytical methods confirm the encapsulation of FVB into cyclodextrins nano cavities and reveal the structural changes.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Nanoscience & Nanotechnology
Shuntaro Uenuma, Kimika Endo, Norifumi L. Yamada, Hideaki Yokoyama, Kohzo Ito
Summary: A novel approach using pseudo-polyrotaxane nanosheets (PPRNS) to form polymer brush layers on material surfaces was reported, which showed high adhesion and oil-repellent properties. The flexible PPRNS structure enabled it to adhere well to various surfaces, making it a promising method for improving surface properties across different material types.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yuyan Chen, Lijie Yan, Yangyang Chi, Yan Liu, Yufen Zhao
Summary: The co-evolution of peptide formation and membrane self-assembly is crucial for the origin of life, yet more research is needed on the interaction between prebiotic fatty-acid membranes and peptide synthesis. This study investigated the sodium trimetaphosphate (P(3)m)-activated peptide formation reaction of phenylalanine (Phe) in a vesicle system. The experimental results showed that decanoic acid can react with amino acids to form N-acyl amino acids (NAA) via the activation effect of P(3)m.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Multidisciplinary Sciences
Gobinda Das, Thirumurugan Prakasam, Nour Alkhatib, Rasha G. G. AbdulHalim, Falguni Chandra, Sudhir Kumar Sharma, Bikash Garai, Sabu Varghese, Matthew A. A. Addicoat, Florent Ravaux, Renu Pasricha, Ramesh Jagannathan, Na'il Saleh, Serdal Kirmizialtin, Mark A. A. Olson, Ali Trabolsi
Summary: Controlling the number and positioning of molecular switches in porous materials is crucial for their functionality and properties. In this study, a synthetic strategy involving mixed linkers was used to control the distribution of spiropyran-functionalized linkers in a covalent organic framework. The resulting spiropyran-COF exhibited excellent reversible photoswitching behavior and morphological transitions in response to UV light. The merocyanine-equipped COFs were stable and had a more ordered structure with enhanced photoluminescence.
NATURE COMMUNICATIONS
(2023)
Article
Polymer Science
Atsushi Tamura, Moe Ohashi, Asato Tonegawa, Tae Woong Kang, Shunyao Zhang, Nobuhiko Yui
Summary: The temperature-dependent phase transition behavior of acetylated polyrotaxanes (PRXs) consisting of acylated alpha-cyclodextrins threaded onto a poly(ethylene glycol) chain in an aqueous solution is investigated. Acetyl (Ac), propionyl (Pr), and butyryl (Bu) group-modified PRXs with different degrees of substitution are synthesized to elucidate the effect of the alkyl chain length of the acyl groups on temperature responsivity. The findings suggest that the alkyl chain length of the acyl groups determines the predominant force involved in the temperature-induced phase transition of acylated PRXs, with hydrophobic interactions being predominant for Pr-PRXs and Bu-PRXs, while hydrogen bond formation may occur in Ac-PRXs.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2021)
Review
Chemistry, Multidisciplinary
John H. Reed, Florian P. Seebeck
Summary: Enzyme catalysis is a major driver in preparative chemistry innovation, with relatively less attention given to substrate engineering. This Minireview highlights the idea that the design of synthetic reagents can be an equally fruitful approach in developing novel enzyme-catalyzed group transfer chemistry. It discusses key examples from the literature and provides an opinion on future development, aiming to replicate the success of natural group transfer reagents.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Zhen Hua Xie, Min Zhi Rong, Ming Qiu Zhang
Summary: In this study, a water-soluble polymeric binder PAA-B-HPR is developed by crosslinking commercial poly(acrylic acid) and hydroxypropyl polyrotaxane, which is applied to the fabrication of the Si anode for Li-ion batteries. The battery exhibits outstanding specific capacity and cycle stability, with a discharge specific capacity of 1056 mA h/g at 55 degrees C after 500 cycles and a capacity fading rate of only 0.10% per cycle. This work paves the way for the practical application of Si anodes in Li-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Dongliang Wu, Lin Liu, Qinghai Ma, Qi Dong, Yongqin Han, Lei Liu, Songfang Zhao, Ruliang Zhang, Maoju Wang
Summary: In this study, the incorporation of sliding crosslinkers and dynamic disulfide bonds into the main chains of polyurethane (PU) using a one-pot synthesis method provides the PU with exceptional mechanical properties and self-healing capability. The PU elastomers demonstrate high stretchability, fracture energy, and puncture energy. Furthermore, the presence of dynamic reversible hydrogen and disulfide bonds allows the elastomer to achieve stress and strain repair even at high temperatures.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
Nima Pakzad, Mahdi Abdollahi, Mohammad Ali Semsarzadeh
Summary: An aqueous solution of chlorinated polyethylene glycol (Cl-PEG-Cl) and a-cyclodextrin (a-CD) was used to form inclusion complexes, which resulted in the formation of polypseudorotaxane (PPRx) and polyrotaxane (PRx) by stabilizing the complex with 4-ethylaniline as the blocking agent. Finally, crosslinked aCD-based PRx with a tubular structure was formed via condensation reactions between a-cyclodextrins and epichlorohydrin. The resulting products were characterized by H-1-NMR, C-13-NMR, and XRD spectroscopies.
Article
Chemistry, Physical
Xianglong Kong, Zhi Li, Xudong Zhao, Shunpeng Chen, Zhuoyan Wu, Fei He, Piaoping Yang, Xinghua Chang, Xingguo Li, Zhiliang Liu, Jie Zheng
Summary: A surface group directed method has been developed to achieve the low-temperature synthesis and self-assembly of zero-dimensional aluminum nanocrystals on one-dimensional carbon fibers. The resulting nanostructured material exhibits excellent electron transfer properties, fast lithiation characteristics, and buffering effects for volume change, demonstrating superior lithium storage performance.
Review
Chemistry, Multidisciplinary
Akira Harada, Yoshinori Takashima, Akihito Hashidzume, Hiroyasu Yamaguchi
Summary: Supramolecular polymers and materials are designed and prepared using macromolecular recognition by cyclodextrins as host parts, leading to the creation of various structures such as polyrotaxanes, tubular polymers, supramolecular machines, and artificial polymerases. Different types of recognition, such as main-chain recognition and side-chain recognition, result in unique properties such as macroscopic self-assembly, self-healing, sol-gel transition, and muscle-like materials.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Review
Chemistry, Multidisciplinary
Martin Votava, Bart Jan Ravoo
Summary: Cyclodextrin-based liquid crystals have shown great potential in recent years, with promising innovations in molecular design and proof-of-concept applications like ion-conductive and proton-conductive liquid crystals, nanoparticle additives for liquid crystal display technology, and liquid crystal-based sensors. These examples demonstrate the significant impact of these unique soft materials for future research and interdisciplinary applications.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Organic
Benjamin D. Bergstrom, Garrett Toth-Williams, Anna Lo, Jeffrey W. Toman, James. C. Fettinger, Jared T. Shaw
Summary: Polysubstituted allenes are important synthetic intermediates that offer structural complexity, modularity, and axial chirality in further transformations. We report the synthesis of tetrasubstituted allenes featuring a novel geminal acyl/alkoxy substitution, which exhibit both stability and interesting reactivity in several applications.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Benjamin D. Bergstrom, Garrett Toth-Williams, Anna Lo, Jeffrey W. Toman, James. C. Fettinger, Jared T. Shaw
Summary: Polysubstituted allenes are valuable synthetic intermediates that offer structural complexity, modularity, and chirality for further transformations. In this study, a novel method for synthesizing tetrasubstituted allenes with geminal acyl/alkoxy substitution is reported. These unique push-pull allenes demonstrate bench-stability and interesting reactivity in various applications.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Hiroyuki Hattori, Kento Ishida, Yohei Ogiwara, Norio Sakai
Summary: In this study, a new synthetic method for acyl fluorides was developed through a phosphine-catalyzed acyl-group exchange reaction. This is the first example of utilizing an acyl fluoride as a deoxyfluorination reagent.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.