Review
Chemistry, Multidisciplinary
Liya Chen, Xinru Sheng, Guangfeng Li, Feihe Huang
Summary: Mechanically interlocked polymers (MIPs) are a type of polymeric material with mechanically interlocked structures, known for their unique properties and potential applications in emerging fields.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Zhaoming Zhang, Wei You, Peitong Li, Jun Zhao, Zhewen Guo, Tingjie Xu, Jieqi Chen, Wei Yu, Xuzhou Yan
Summary: Mimicking filament sliding in sarcomeres using artificial molecular muscles has sparked interest in developing advanced polymeric materials. By decoupling a bistable [c2]daisy chain into individual extended and contracted ones, the relationship between microscopic motion and macroscopic mechanical properties of mechanically interlocked networks (MINs) is established.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zewen Zhu, Sara West, Hengxi Chen, Guan-Hui Lai, Shuntaro Uenuma, Kohzo Ito, Masaya Kotaki, Hung-Jue Sue
Summary: A mechanically interlocked vitrimer (MIV) based on a benzoxazine monomer and polyrotaxane has been developed through dynamic covalent bond chemistry. The MIV exhibited enhanced mechanical performance, including ductility and tensile strength, while maintaining high Young's modulus and glass transition temperature. Reprocessing the MIV did not compromise its mechanical performance and thermal stability. This study demonstrates the potential of high-performance eco-friendly thermosetting vitrimers.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Organic
Jorge Lopez-Sanchez, Mateo Alajarin, Aurelia Pastor, Jose Berna
Summary: A series of interlocked profragrances were synthesized based on a [2]pseudorotaxane scaffold, with controlled release achieved through thermal dethreading, enzymatic hydrolysis, increasing solvent polarity, or photochemical isomerization. The steric demand of the thread's ends modulates the temperature of dethreading, allowing for different rates of delivery depending on precursor structures. The controlled release of the interlocked profragrances corresponds to inputs and outputs similar to YES or AND logic gates.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Alejandro Lopez-Moreno, Julia Villalva, Emilio M. Perez
Summary: SWNTs are a highly interesting nanomaterial, where chemical modifications can enhance their intrinsic properties. The mechanical bond is appealing for materials science and SWNTs. Making MINTs has potential advantages compared to covalent or classic supramolecular derivatives.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Polymer Science
Jian Li, Bokai Zhang, Yushan Li
Summary: Polymer-related materials exhibit rich glassy behaviors at different length scales due to their various molecular structures and topological constraints. Recent studies have identified transient interpenetration of long-chain rings contributing to dynamic arrest on the center-of-mass level. Interpenetration of rings is proposed as an approach to facilitate glass formation in polymer melts. Our work investigates glass transition on the nanometer-scale segments influenced by permanent interpenetration of rings using molecular dynamics simulations. We find that decreasing chain length in the mechanically interlocked system is equivalent to inducing an effective chain stiffness on the subrings, providing a unified explanation for unique structural features and transient dynamic arrest. Furthermore, our work reveals a dynamic transition from weak to strong caging at the crossover temperature, deepening the understanding of induced stiffness on glass transition.
Review
Chemistry, Multidisciplinary
Kenichi Kato, Shixin Fa, Shunsuke Ohtani, Tan-hao Shi, Albert M. Brouwer, Tomoki Ogoshi
Summary: Pillar[n]arenes are pillar-shaped macrocyclic compounds with unique structures and excellent properties, such as versatility, substituent-dependent solubility, cavity-size-dependent host-guest properties, and unit rotation. These advantages enable the high-yield synthesis and rational design of pillar[n]arene-based mechanically interlocked molecules (MIMs) that can dynamically convert between interlocked and unlocked states. The highly symmetrical pillar-shaped structures of pillar[n]arenes are also useful for studying the motion of pillar[n]arene wheels in MIMs and creating sophisticated MIMs with higher-order structures.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Chaoqing Yang, Hongliang Chen
Summary: This review provides an overview of the research progress in mechanically interlocked molecules (MIMs), focusing on their unique structural properties and the electron transport mechanisms in MIM junctions (MIMJs) for different nanodevices.
ACS APPLIED NANO MATERIALS
(2022)
Article
Multidisciplinary Sciences
Xue Yang, Lin Cheng, Zhaoming Zhang, Jun Zhao, Ruixue Bai, Zhewen Guo, Wei Yu, Xuzhou Yan
Summary: This study presents mechanically interlocked networks with densely rotaxanated backbones as a model system to understand the integration and amplification of molecular-level motion in macroscopic mechanical properties. The motion of mechanical bonds leads to the expansion of the network, imparting stretchability and puncture resistance to the materials. Similarly, the dissociation and sliding motion contribute to the toughness and damping capacity of the materials. This research provides insights into the relationship between microscopic motion and macroscopic mechanical performance.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Organic
Milo D. Cornelissen, Simone Pilon, Jan H. van Maarseveen
Summary: Mechanically interlocked molecules, such as catenanes and rotaxanes, exhibit unique properties and have potential applications as artificial molecular machines and drug discovery targets. Covalent and non-covalent strategies each have their own advantages and limitations, but combining them may lead to new research opportunities.
SYNTHESIS-STUTTGART
(2021)
Article
Mechanics
Ioannis Koureas, Mohit Pundir, Shai Feldfogel, David S. Kammer
Summary: This study investigates the failure mechanisms and response capacities of topologically interlocked structures through parametric analysis and analytical-computational methods. By controlling the combination of structure height and friction coefficient, the failure mechanism can be influenced to be slip-governed or stick-governed. Furthermore, the sticking mechanism and rotation of the blocks have a saturation effect on the mechanical performance of the structure, providing a theoretical upper bound for achievable performance.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Mechanics
Ioannis Koureas, Mohit Pundir, Shai Feldfogel, David S. Kammer
Summary: Topologically interlocked materials and structures, assemblies of unbonded interlocking building blocks, have shown exceptional mechanical properties. This study introduces a hierarchical approach inspired by biological systems to overcome limitations and enhance mechanical performance. By designing sinusoidal surface morphologies, numerical simulations demonstrate increased frictional strength and the ability to reach the theoretical limit of the structural carrying capacity with realistic friction coefficients.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Polymer Science
Hao Guo, Kun Qian, Mesfin Tsige
Summary: This study investigates the conformational properties of [2]catenane polymers in solution, revealing their dependence on solvent quality and molecular weight. The findings show that [2]catenane polymers have a lower theta-temperature compared to linear and ring counterparts, and their conformation significantly deviates from an analogous ring polymer in a poor solvent condition.
Article
Chemistry, Physical
Jiae Seo, Gwang-Hee Lee, Joon Hur, Myeong-Chang Sung, Ji-Hun Seo, Dong-Wan Kim
Summary: Molecular shuttles inside mechanically interlocked polymer can enhance the performance of solid polymer electrolyte. Polyrotaxane-based MIP electrolyte exhibits high ionic conductivity and excellent electrochemical stability, while the built-in molecular shuttle design enables high-performance lithium-ion batteries.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lorenzo Gualandi, Paola Franchi, Elisabetta Mezzina, Stephen M. Goldup, Marco Lucarini
Summary: Biradical spin probes can provide information about distances between molecules, but in supramolecular complexes, the shape of EPR spectra is influenced by the rate of exchange between different states, in addition to J. Thorough analysis of both J and rates of conformational interconversion is necessary when interpreting the spectra of biradicals employed as spin probes in solution.
Review
Chemistry, Multidisciplinary
Alex Inthasot, Shun-Te Tung, Sheng-Hsien Chiu
ACCOUNTS OF CHEMICAL RESEARCH
(2018)
Article
Chemistry, Multidisciplinary
Shun-Te Tung, Hung-Te Cheng, Alex Inthasot, Fang-Che Hsueh, Ting-Jia Gu, Pei-Cong Yan, Chien-Chen Lai, Sheng-Hsien Chiu
CHEMISTRY-A EUROPEAN JOURNAL
(2018)
Article
Chemistry, Organic
Chi-You Tsai, Chien-Chen Lai, Yi-Hung Liu, Shie-Ming Peng, Richard P. Cheng, Sheng-Hsien Chiu
JOURNAL OF ORGANIC CHEMISTRY
(2018)
Article
Chemistry, Organic
Yu-Hsuan Chang, Yong-Jay Lee, Chien-Chen Lai, Yi-Hung Liu, Shie-Ming Peng, Sheng-Hsien Chiu
Article
Chemistry, Multidisciplinary
Alex Inthasot, Tzu-Yi Tai, Sheng-Hsien Chiu
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2019)
Article
Chemistry, Organic
Tzu-Yi Tai, Yi-Hung Liu, Chien-Chen Lai, Shie-Ming Peng, Sheng-Hsien Chiu
Article
Chemistry, Multidisciplinary
Fang-Che Hsueh, Chi-You Tsai, Chien-Chen Lai, Yi-Hung Liu, Shie-Ming Peng, Sheng-Hsien Chiu
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Organic
Ching-Yu Chen, Han-Chen Xu, Tsung-Hsien Ho, Chun-Ju Hsu, Chien-Chen Lai, Yi-Hung Liu, Shie-Ming Peng, Sheng-Hsien Chiu
Summary: The study demonstrates that 2,6-dimethanolpyridine shows good complementarity towards di(ethylene glycol) for complexation of Na+ ions, enabling efficient synthesis of hetero[2] catenanes, especially in branched systems with multiple isophthalaldehyde units.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Ting-Hsuan Chiang, Cheng-Yen Tsou, Yu-Hsuan Chang, Chien-Chen Lai, Richard P. Cheng, Sheng-Hsien Chiu
Summary: The research introduces a new slippage system based on p-tert-butylbenzyl-terminated imidazolium ions and di(ethylene glycol)containing macrocycles for constructing a molecular Lock & Lock box. The multivalent structure with four slippage linkers provides high stability to the molecular box, which dissociates into its two components under suitable external stimuli.
Article
Chemistry, Organic
Hsien-Liang Cho, Chien-Chen Lai, Yi-Hung Liu, Hsiu-Fu Hsu, Shie-Ming Peng, Sheng-Hsien Chiu
Summary: This paper reports the insertion of Pd(II) into an initially achiral rotaxane, resulting in two chiral metallorotaxanes. Chiral additives and chiral TRISPHAT counteranions were used to confirm the existence of chirality and resolve the enantiomers of the C-2-symmetrical N-heterocyclic carbene complex.
Article
Chemistry, Multidisciplinary
I-Cheng Tseng, Min-Xuan Zhang, Shih-Lun Kang, Sheng-Hsien Chiu
Summary: By controlling the switching of associated anions, this rotaxane catalyst can selectively catalyze reactions through different pathways. The catalyst exposes different catalytic stations during the reaction, resulting in the formation of different products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Chi-You Tsai, Hung-Te Cheng, Sheng-Hsien Chiu
Summary: A new approach for synthesizing improbable rotaxanes using malonate-centered rotaxanes as interlocked surrogate precursors has been developed. This method allows for the assembly of a desired dumbbell-shaped structure from completely separate portions with flexibility in structural design.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Min-Xuan Zhang, Hung-Te Cheng, Sheng-Hsien Chiu
Summary: Malonate diesters can thread into a di(ethylene glycol)-containing macrocycle with the templating effect of a Na+ ion, and rotaxanes can be synthesized efficiently by applying several stoppering reactions. A molecular switch was constructed using this recognition system, in which the interlocked macrocycle can be moved between two rarely used stations (malonate and TAA) by acid/base addition and the presence/absence of Na+ ions.
Article
Chemistry, Multidisciplinary
Fang-Che Hsueh, Chi-You Tsai, Chien-Chen Lai, Yi-Hung Liu, Shie-Ming Peng, Sheng-Hsien Chiu
CHEMICAL COMMUNICATIONS
(2020)