Article
Chemistry, Multidisciplinary
Koki Fujimura, Yoshihiro Ueda, Yousuke Yamaoka, Kiyosei Takasu, Takeo Kawabata
Summary: A method for rotaxane synthesis by enlarging the terminal phenol group of the axle component through aromatic bromination has been developed. This method involves an end-capping strategy by swelling the phenol group at the axle terminal. The advantages of this strategy include easy availability of axle components with various swelling precursors, a wide range of products (including a [3]rotaxane), mild conditions for the swelling process, rich potential for derivatizing the brominated rotaxanes, and the possibility of releasing the axle component by degradative dethreading of the thermally stable brominated rotaxanes under basic conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Adrian Saura-Sanmartin, Tomas Nicolas-Garcia, Aurelia Pastor, David Quinonero, Mateo Alajarin, Alberto Martinez-Cuezva, Jose Berna
Summary: This paper reports the synthesis of a ditopic interlocked building-block and its self-assembly into a cyclic dimer. NMR studies identified a cyclic hetero[4]pseudorotaxane as the main supramolecular structure in solution. Computational studies revealed that the assembly is the result of positive cooperativity in the hydrogen-bonding-driven assembly of this mechanically interlocked supramolecule. The disassembly of the cyclic dimer was achieved through a Diels-Alder reaction and competitive molecular recognition.
Article
Multidisciplinary Sciences
Minori Inazu, Yuji Akada, Takane Imaoka, Yoko Hayashi, Chinami Takashima, Hiromi Nakai, Kimihisa Yamamoto
Summary: This study directly observes and records the formation and dissociation of unstable dimers and trimers in real time using scanning transmission electron microscopy combined with elemental identification, filling the gaps in previous experiments at atomic resolution.
NATURE COMMUNICATIONS
(2022)
Article
Geography
Robert Kitzmann
Summary: This contribution critically reflects upon the recent debate on housing for degrowth and argues for the inclusion of public and private sector actors in the discussion. It proposes research on home swapping as a way to address multiple goals and stimulate a more systemic research agenda.
Article
Energy & Fuels
Congbo Li, Ningbo Wang, Wei Li, Qian Yi, Dongfeng Qi
Summary: In recent years, electric vehicles have gained popularity among consumers. However, issues such as long charging time, high battery purchase costs, and large charging load have hindered their development. This study proposes a battery centralized scheduling strategy to address these problems by optimizing battery swap scenarios, resulting in reduced costs and charging load.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Organic
Takaaki Morise, Atsuya Muranaka, Hayato Ban, Mei Harada, Masaya Naito, Kazuyuki Yoshida, Nagao Kobayashi, Masanobu Uchiyama, Yuji Tokunaga
Summary: In this study, a molecularly chiral [3]rotaxane was synthesized, separated enantiomers using chiral high-performance liquid chromatography, and the absolute configuration of each [3]rotaxane was revealed through density functional theory calculations.
Article
Chemistry, Inorganic & Nuclear
Taeko Aizawa, Shigehisa Akine, Toshiyuki Saiki, Takashi Nakamura, Tatsuya Nabeshima
Summary: This study reports a novel pseudomacrocyclic anion receptor that can spontaneously form rotaxane structures in the presence of a specific axle. It exhibits strong anion binding ability and is thermodynamically stable, making it a promising candidate for various applications.
DALTON TRANSACTIONS
(2022)
Article
Thermodynamics
Ziqi Wang, Sizu Hou
Summary: It is important for electric vehicles (EVs) to swap their depleted batteries in the appropriate battery swapping stations due to the limited number of fully charged batteries. This study proposes a real-time optimization strategy that recommends an optimal station for EVs based on their swapping request, aiming to save time for EV owners and improve the operational efficiency and stability of battery swapping stations and the distribution network. The strategy combines rolling optimization and Lyapunov optimization from two different time scales, and achieves better results in terms of operational performance and solving speed through simulations.
Article
Engineering, Multidisciplinary
Mengyu Rong, Hongbo Shi, Bing Song, Yang Tao
Summary: A new distributed dynamic process monitoring strategy named multi-block dynamic weighted principal component regression (DWPCR) is developed, which partitions process variables into multiple subblocks using the concept of community partition in complex networks. The monitoring model for each subblock is established and a novel weighting key components strategy based on fault information is proposed for process monitoring.
Article
Chemistry, Multidisciplinary
Jamie T. T. Wilmore, Yuen Cheong Tse, Andrew Docker, Caspar Whitehead, Charlotte K. K. Williams, Paul D. D. Beer
Summary: A series of dynamic metalloporphyrin [2]rotaxane molecular shuttles were synthesized with high yield using active metal template synthetic methodology. The dynamic macrocycle translocation is controlled by an inter-component co-ordination interaction between the macrocycle pyridyl and axle Zn(II) metalloporphyrin. The shuttling behavior can be inhibited by a neutral Lewis base, but can be tuned through rotaxane demetallation or subsequent metallation.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Rikito Takashima, Daisuke Aoki, Akira Takahashi, Hideyuki Otsuka
Summary: We have developed a versatile and simple synthetic method for producing a [3]catenane. By heating a rotaxane containing bis(hindered amino) disulfide groups, the [3]catenane is spontaneously and selectively produced. The obtained [3]catenane can be successfully polymerized, providing a platform for the synthesis of various interlocking polymers. A thermally driven interconversion between the rotaxane and catenane is achieved using a dynamic bis(hindered amino) disulfide.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ze Yu, Mathias Centola, Julian Valero, Michael Matthies, Petr Sulc, Michael Famulok
Summary: Researchers have developed an automated molecular actuator composed of T7 RNA polymerase and a DNA rotaxane, which can achieve transcription and macrocycle movement in a self-controlled manner. By controlling the transcription activity of T7RNAP, the actuator switches the macrocycle between static and dynamic states. This rotaxane actuator can run autonomously and cyclically perform transcription and macrocycle movement as long as NTP fuel is available.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Plant Sciences
Deok Hyun Seo, Jinwoo Jang, Dongryeol Park, Youngdae Yoon, Yang Do Choi, Geupil Jang
Summary: PEP-ASSOCIATED PROTEIN 3 (OsPAP3) is found to regulate chloroplast biogenesis in rice by controlling the transcription of chloroplast genes. Overexpression of OsPAP3 in rice improves tiller formation and grain yield by promoting chloroplast development.
Article
Geosciences, Multidisciplinary
B. Bradak, D. Csonka, A. Novothny, J. Szeberenyi, A. Medvedova, P. Rostinsky, K. Feher, G. Barta, T. Vegh, K. Kiss, M. Megyeri
Summary: The geomorphological characteristics of loess succession at Male nad Hronom in Slovakia provide a valuable opportunity to investigate differences in soil formation in various topographic positions. The study revealed differences in soil formation dynamics along the slope, with paleosols in lower slope positions showing signs of quasi-constant sediment input. The climate conditions of the last interglacial and Late Pleistocene played a significant role in pedogenesis, with MIS 3 climate favoring intense dust accumulation. Despite erosion events, the sequence affected by sediment input in lower slope positions preserved soil horizons intact.
Article
Biochemical Research Methods
Eleonora Bailoni, Bert Poolman
Summary: The bottom-up construction of a self-reproducing cell is a challenge in synthetic biology. This study focuses on sustainable phospholipid biosynthesis and reconstitutes an enzymatic network for glycerol 3-phosphate synthesis. The researchers also design a dynamic dialysis setup to control the external medium and achieve sustainable synthesis.
ACS SYNTHETIC BIOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Xiao-Yang Chen, Hongliang Chen, J. Fraser Stoddart
Summary: The tetracationic cyclophane, known as the little blue box, is valuable in constructing stimuli-responsive materials by binding small pi-donors and forming complexes with viologen radical cations. Its significance in the discovery of host-guest complexes and mechanically interlocked molecules is highlighted.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yu Wang, Huang Wu, Leighton O. Jones, Martin A. Mosquera, Charlotte L. Stern, George C. Schatz, J. Fraser Stoddart
Summary: Cocrystal engineering is a popular strategy for tuning the photophysical properties of crystalline materials. This study reports a color-tunable upconversion-emission switch based on the interconversion between two cocrystals. The research provides a critical example of precise control of cocrystal-to-cocrystal transformation and offers a reference for fabricating color tunable nonlinear optical materials in the solid state.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Nanoscience & Nanotechnology
Hongliang Chen, Chuancheng Jia, Xin Zhu, Chen Yang, Xuefeng Guo, J. Fraser Stoddart
Summary: Developing new materials is a long-standing goal in various fields, and understanding single-molecule reactions can deepen our understanding of chemical reactions and provide new frameworks in materials science. This review focuses on state-of-the-art chemical reactions in single-molecule junctions and highlights the advantages of real-time testbeds for studying reaction dynamics, intermediates, transition states, and solvent effects. The behavior of single-molecule reactions is compared with reactions in ensemble states, and the potential of leveraging single-molecule catalysis for large-scale materials production is explored.
NATURE REVIEWS MATERIALS
(2023)
Review
Polymer Science
Han Han, James S. W. Seale, Liang Feng, Yunyan Qiu, J. Fraser Stoddart
Summary: Rotaxanes with well-defined ring sequences are attractive synthetic goals for constructing functional materials. Sequence-controlled synthesis of oligo- and polyrotaxanes is important for developing sequence-defined polymers and dynamic functional materials. This Review discusses the pivotal role of sequence isomerism in rotaxanes and explores different synthetic approaches for constructing sequence-controlled rotaxanes. By comparing the advantages and disadvantages of these approaches, possible synthetic strategies are proposed to predict the future of sequence-controlled synthesis of polyrotaxanes.
JOURNAL OF POLYMER SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Xinchun Yang, Zakir Ullah, J. Fraser Stoddart, Cafer T. Yavuz
Summary: Porous organic cages (POCs) are a new class of low-density crystalline materials that have wide applications in molecular recognition, gas storage and separation, and proton conduction. Compared to other porous structures like MOFs, COFs, and POPs, POCs have the advantages of specific surface areas, porosities, open pore channels, tunable structures, and solubilities in common solvents. This review summarizes recent progress in POCs, including their design, synthesis, characterization, and applications, and discusses future challenges and opportunities in the field.
Article
Chemistry, Multidisciplinary
Taeyeon Kim, Yuanning Feng, James P. O'Connor, J. Fraser Stoddart, Ryan M. Young, Michael R. Wasielewski
Summary: Designing and controlling charge transfer pathways in organic semiconductors are crucial for solar energy applications. This study investigates the photoinduced charge transfer and relaxation dynamics in host-guest complexes, and demonstrates that the charge transfer pathway can be controlled by subtle chemical modifications of the acceptor host.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yang Liu, Xin-Ru Guan, Duan-Chao Wang, J. Fraser Stoddart, Qing-Hui Guo
Summary: Single-crystal-to-single-crystal (SCSC) polymerization is an effective method for environmentally friendly preparation of polymer single crystals (PSCs) with high crystallinity and molecular weights. Solubility and solution processibility are major challenges for practical applications of PSCs, but this study successfully synthesized soluble and processable PSCs with rigid polycationic backbones. The resulting polymeric crystals have excellent solubility, crystallinity and rheological properties, and can be characterized using various techniques.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Aisha N. Bismillah, Toby G. Johnson, Burhan A. Hussein, Andrew T. Turley, Promeet K. Saha, Ho Chi Wong, Juan A. Aguilar, Dmitry S. Yufit, Paul R. McGonigal
Summary: In this study, the enantiomerization of fluxional carbon cages and its consequences for stereochemical information transmission were reported. Strain-assisted Cope rearrangements were used to invert the sp(3)-carbon stereochemistry of rigid tricyclic cages, emulating the low-barrier configurational dynamics seen in sp(3)-nitrogen inversion or conformational isomerism. This dynamic enantiomerization could be controlled by external reagents and the configuration of the cage was controlled by neighboring, fixed stereogenic centers. The fluxional cage acted as a conduit to transmit stereochemical information from the ligand and also transferred its dynamic properties to chiral-at-metal coordination environments, influencing catalysis, ion pairing, and ligand exchange energetics.
Article
Chemistry, Multidisciplinary
Promeet K. K. Saha, Abhijit Mallick, Andrew T. T. Turley, Aisha N. N. Bismillah, Andrew Danos, Andrew P. P. Monkman, Alyssa-Jennifer Avestro, Dmitry S. S. Yufit, Paul R. R. McGonigal
Summary: The balance between strain relief and aromatic stabilization determines the structure and function of non-planar pi-aromatics. By increasing the strain energy beyond aromatic stabilization energy, we observed a rearrangement of the system and the rupture of its aromaticity. The introduction of steric bulk leads to contorted conformations where aromatic stabilization and strain are close in energy. Under high strain, the aromatic pi-electron delocalization breaks and a non-aromatic, bicyclic analogue called 'Dewar tropylium' is formed. This study provides experimental insights into the extent of steric deformation tolerated by an aromatic carbocycle and the nature of aromaticity.
Review
Chemistry, Multidisciplinary
Haoran Wang, Qiyao Li, Parvej Alam, Haotian Bai, Vandana Bhalla, Martin R. Bryce, Mingyue Cao, Chao Chen, Sijie Chen, Xirui Chen, Yuncong Chen, Zhijun Chen, Dongfeng Dang, Dan Ding, Siyang Ding, Yanhong Duo, Meng Gao, Wei He, Xuewen He, Xuechuan Hong, Yuning Hong, Jing-Jing Hu, Rong Hu, Xiaolin Huang, Tony D. James, Xingyu Jiang, Gen-ichi Konishi, Ryan T. K. Kwok, Jacky W. Y. Lam, Chunbin Li, Haidong Li, Kai Li, Nan Li, Wei-Jian Li, Ying Li, Xing-Jie Liang, Yongye Liang, Bin Liu, Guozhen Liu, Xingang Liu, Xiaoding Lou, Xin-Yue Lou, Liang Luo, Paul R. McGonigal, Zong-Wan Mao, Guangle Niu, Tze Cin Owyong, Andrea Pucci, Jun Qian, Anjun Qin, Zijie Qiu, Andrey L. Rogach, Bo Situ, Kazuo Tanaka, Youhong Tang, Bingnan Wang, Dong Wang, Jianguo Wang, Wei Wang, Wen-Xiong Wang, Wen-Jin Wang, Xinyuan Wang, Yi-Feng Wang, Shuizhu Wu, Yifan Wu, Yonghua Xiong, Ruohan Xu, Chenxu Yan, Saisai Yan, Hai-Bo Yang, Lin-Lin Yang, Mingwang Yang, Ying-Wei Yang, Juyoung Yoon, Shuang-Quan Zang, Jiangjiang Zhang, Pengfei Zhang, Tianfu Zhang, Xin Zhang, Xin Zhang, Na Zhao, Zheng Zhao, Jie Zheng, Lei Zheng, Zheng Zheng, Ming-Qiang Zhu, Wei-Hong Zhu, Hang Zou, Ben Zhong Tang
Summary: This review provides a comprehensive summary of the applications of aggregation-induced emission (AIE) luminogens in biological imaging, dynamic physiological processes, disease diagnosis and treatment, and specific analyte detection and monitoring. The review also discusses critical issues and future directions, aiming to promote the development of AIE in the fields of life and health.
Article
Chemistry, Multidisciplinary
Ping Zhou, Yanjun Fu, Maolin Wang, Renhui Qiu, Yuwei Wang, J. Fraser Stoddart, Yuping Wang, Hongliang Chen
Summary: Supramolecular electronics use noncovalent interactions like π-π and hydrogen bonding to introduce molecular assemblies into electronic devices. This research demonstrates a strategy for building electronically robust switches using two different noncovalent interactions. By compressing the junction, the single-supermolecule switch is turned ON through π-π interactions dominating the transport. Stretching the junction to form hydrogen-bonded dimers turns the switch OFF, resulting in a dramatic decrease in conductance. The study shows the potential for designing robust bistable mechanoresponsive devices for integrated circuits in microelectromechanical systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Chi-Hsien Wang, Yi-Chia Lin, Surojit Bhunia, Yuanning Feng, Pramita Kundu, Charlotte L. Stern, Pei-Lin Chen, J. Fraser Stoddart, Masaki Horie
Summary: In this study, stimuli-responsive molecular crystals with distinct thermal phase transitions, photoinduced deformations, and mechanical behavior were reported. The understanding of the correlation between structure-thermomechanical and structure-photomechanical properties was advanced for the development of multi-stimulus-responsive materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Fangbai Xie, Haochuan Mao, Chenjian Lin, Yuanning Feng, J. Fraser Stoddart, Ryan M. Young, Michael R. Wasielewski
Summary: This study demonstrates that a photogenerated spin-correlated radical ion pair can be used to sense an electric field change through molecular recognition. The experiment shows that the distance between the two charges decreases when a certain molecule encapsulates one of the charges, indicating that the system can function as a quantum sensor to detect electric field changes.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yu Wang, Huang Wu, Leighton O. Jones, Martin A. Mosquera, Charlotte L. Stern, George C. Schatz, J. Fraser Stoddart
Summary: Cocrystal engineering is a popular strategy for tuning the photophysical properties of crystalline materials. This research presents a color-tunable upconversion-emission switch based on the interconversion between two cocrystals, demonstrating the reversible transformation and color change mechanism between cocrystals.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
