Article
Optics
Anuj Dalal, Kapeesha Nehra, Anjli Hooda, Devender Singh, Rajender Singh Malik, Sumit Kumar
Summary: This paper highlights the synthesis of fluorescent derivatives of 2,2'-bipyridine, showcasing their applications in electroluminescent devices. The compounds were characterized using various spectroscopic techniques and photophysical properties were identified through photoluminescence spectra. Additionally, the compounds' electrochemical behavior was studied and their kinetic stability and chemical inertness were confirmed through optical band gap data analysis.
Article
Chemistry, Inorganic & Nuclear
Thomas M. Klapoetke, Moritz Kofen, Joerg Stierstorfer
Summary: N-Hydroxymethylation provides a promising method for introducing nitratomethyl and azidomethyl moieties, leading to high-performing melt-castable energetic materials with increased sensitivities towards mechanical stimuli. The diazidomethyl derivative, in particular, shows promise as a new melt-castable primary explosive due to its short deflagration to detonation transition.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Organic
Gabriel Hoffrichter, Arne Luetzen
Summary: A new positively allosteric bis(beta-cyclodextrin) receptor 1 was synthesized and studied for its binding affinity towards sodium deoxycholate in aqueous solution. It was found that the addition of a zinc(ii) phenanthroline complex as an effector for the allosteric 2,2'-bipyridine motif resulted in more than an 18-fold increase in the receptor's binding constant towards the substrate.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Mingchun Ye, Mi Jen Kuo, Raul F. Lobo
Summary: This study reports a highly efficient Pd-catalyzed oxidative homocoupling reaction with high yield and selectivity, as well as a high turnover frequency. The product obtained in the experiment is nearly pure, and the reaction was found to follow a bimetallic mechanism based on kinetic and mechanistic investigations.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Guilherme R. Goncalves, Alexandre B. de Carvalho, Joao Honorato, Katia M. Oliveira, Rodrigo S. Correa
Summary: This study presents a new polymorph of a copper complex, characterized by spectroscopic techniques and X-ray diffraction. The different coordination structures between Form I and Form II were compared through intramolecular analysis, while the interaction with DNA was evaluated using viscosity and spectrophotometric titrations. This research contributes to exploring the details of the complex's intra and intermolecular interactions.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Multidisciplinary Sciences
Mengjie Hu, Yanping Liu, Yuchen Liang, Taotao Dong, Lichun Kong, Ming Bao, Zhi-Xiang Wang, Bo Peng
Summary: In this study, the authors demonstrated a dearomatization method driven by [5,5]-rearrangement, which enabled the conversion of aryl sulfoxides into di- and trifunctionalized compounds. Mechanistic studies revealed the selectivity and generation of intermediates in the reactions.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Deeb Taher, Jessica R. Wilson, Grayson Ritch, Matthias Zeller, Nathaniel K. Szymczak
Summary: The ability of a phosphine-appended-2,2'-bipyridine ligand to serve as a platform for late-stage ligand modifications was demonstrated using tetrahedral (Ph2P)(2)bpyFeCl(2). Post-metalation Staudinger reaction successfully installed a series of functionalized arenes, including those with Brønsted and Lewis acidic groups, showcasing a versatile strategy to tune ligand properties and incorporate appended functionality.
CHEMICAL COMMUNICATIONS
(2021)
Article
Thermodynamics
Dan-Dan Du, Ning Ren, Jian-Jun Zhang
Summary: Two novel isostructural lanthanide complexes were synthesized using 2-fluorobenzoic acid and 5,5'-dimethy-2,2'-bipyridine, characterized by IR, elemental analysis, and single-crystal X-ray diffraction, showing specific crystal structure and thermal behavior.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Applied
Jun Ni, Zhongcui Guo, Qiong Zhu, Shuqin Liu, Jianjun Zhang
Summary: This article reports the synthesis and characterization of three novel square-planar platinum(II) complexes. These complexes exhibit sensitive response to volatile organic compound (VOC) vapors and show potential application prospects in visual detection.
Article
Biochemistry & Molecular Biology
Paola Peluso, Alessandro Dessi, Roberto Dallocchio, Barbara Sechi, Carlo Gatti, Bezhan Chankvetadze, Victor Mamane, Robin Weiss, Patrick Pale, Emmanuel Aubert, Sergio Cossu
Summary: The chalcogen bond is a noncovalent interaction based on electrophilic features of electron charge density depletion regions on group VI bound atoms. Recent studies have shown promising applications in catalysis and crystal engineering. Research has focused on the role and potential of selenium atoms in enantioseparation, as well as the impact of substitution on chiral discrimination.
Article
Chemistry, Physical
Mengxue Zhou, Ning Ren, Jianjun Zhang
Summary: Six ternary lanthanide complexes with different structures and excellent thermal stability were synthesized and characterized in this study.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Jia-Yuan Zhao, Ning Ren, Ying-Ying Zhang, Kun Tang, Jian-Jun Zhang
Summary: This article presents a series of newly synthesized complexes and their characterization studies. Single crystal data revealed that these complexes are binuclear and possess different crystal structures. The thermal decomposition mechanism of these complexes was investigated using TG/DSC-FTIR technology.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Dan-Dan Du, Ning Ren, Jian-Jun Zhang
Summary: A family of lanthanide-based self-assembling complexes constructed from 2-fluorobenzoic acid and 5,5 '-dimethyl-2,2 '-bipyridine have been successfully fabricated via conventional synthesis. The complexes exhibit structural differences and distinct fluorescence properties, showing high thermal stability up to 450 K.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Leila Noohinejad, Sander van Smaalen, Carsten Paulmann, Martin Tolkiehn
Summary: Temperature dependent crystal structures of the co-crystal of 5,5'-dimethyl-2,2'-bipyridine (55DMBP) and bromanilic acid (H(2)ba) were studied across its phase transitions. The crystal exhibited ferroelectric and paraelectric phases with different modulation wave vectors at different temperatures. The proton transfer within intermolecular hydrogen bonds and the proton exchange between tautomeric forms of H(2)ba were found to be responsible for the ferroelectric and incommensurate phases, respectively.
Article
Chemistry, Multidisciplinary
Jean-Marc Moersdorf, Joachim Ballmann
Summary: This study presents the development of a novel method for the generation of transient alkyl radicals by employing a tailor-made organotitanium half-cage complex. The formation of alkyl radicals is triggered solely by the coordination of a solvent molecule to a titanium center. Experimental, computational, and kinetic analysis confirmed the feasibility of this method and its potential for selective hydrogen atom abstraction transformations and radical coupling reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Zhi-Hui Zhang, Bjorn J. Andreassen, David P. August, David A. Leigh, Liang Zhang
Summary: This Perspective provides an overview of the history and recent progress of molecular weaving, highlighting its potential and research directions in the fields of polymer science and molecular nanotopology. Challenges and future prospects in this emerging field are also discussed.
Article
Chemistry, Multidisciplinary
Sujun Chen, Dingkai Su, Chuancheng Jia, Yanwei Li, Xingxing Li, Xuefeng Guo, David A. Leigh, Liang Zhang
Summary: Measurements on single molecules reveal features that are difficult to detect using techniques that probe averaged properties of many molecules. These measurements provide new opportunities to study the structure and dynamics of synthetic molecular machines.
Article
Multidisciplinary Sciences
Stefan Borsley, Elisabeth Kreidt, David A. Leigh, Benjamin M. W. Roberts
Summary: In this study, a catalysis-driven molecular motor capable of continuous 360 degrees directional rotation powered by chemical fuel was demonstrated. The directionality of the motor is influenced by the chirality of the catalyst and fuel, and can be easily reversed.
Article
Chemistry, Multidisciplinary
Shuntaro Amano, Massimiliano Esposito, Elisabeth Kreidt, David A. Leigh, Emanuele Penocchio, Benjamin M. W. Roberts
Summary: The framework of information thermodynamics allows us to quantitatively relate information to other thermodynamic parameters and reveals the generation of energy and information flow in the chemical to mechanical process. This is of great significance for understanding the thermodynamic level of molecular motors and has practical implications for machine design.
Article
Nanoscience & Nanotechnology
Dean Thomas, Daniel J. Tetlow, Yansong Ren, Salma Kassem, Ulvi Karaca, David A. Leigh
Summary: The sorption of species from a solution into and onto solids plays a crucial role in various technologies. This study introduces a molecular pump system immobilized on polymer beads that uses an energy ratchet mechanism to directionally transport substrates from solution onto the beads. This non-equilibrium sorption enables the transduction of energy from chemical fuels for energy and information utilization, storage, and release.
NATURE NANOTECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Zoe Ashbridge, Elisabeth Kreidt, Lucian Pirvu, Fredrik Schaufelberger, Joakim Halldin Stenlid, Frank Abild-Pedersen, David A. Leigh
Summary: Coordinatively mismatching oligodentate ligands and metal ions offer an effective way to synthesize larger molecular knots using Vernier templating. Different numbers of tridentate ligands can generate knots of various shapes, such as granny knots and trefoil knots.
Review
Chemistry, Multidisciplinary
Stefan Borsley, David A. Leigh, Benjamin M. W. Roberts
Summary: This article discusses the impact of the structure and properties of chemical fuels on the ability to drive molecular machinery, and compares the characteristics of biological fuels with those of synthetic chemical fuels. It also identifies the challenges and opportunities for designing and inventing new chemical fuels to power synthetic molecular machinery.
Article
Chemistry, Multidisciplinary
Deepak Asthana, Dean Thomas, Selena J. Lockyer, Adam Brookfield, Grigore A. Timco, Inigo J. Vitorica-Yrezabal, George F. S. Whitehead, Eric J. L. McInnes, David Collison, David A. Leigh, Richard E. P. Winpenny
Summary: The authors used click chemistry to decorate polymer beads with paramagnetic molecules, which is a promising approach for dynamic nuclear polarization. This study represents the first attempt to attach polymetallic complexes to polymer beads, creating hybrid inorganic-organic rotaxanes.
COMMUNICATIONS CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Stefan Borsley, Benjamin M. W. Roberts, David A. Leigh, Inigo J. Vitorica-Yrezabal
Summary: This article investigates the impact of changes in fuel and barrier-forming species on the nonequilibrium operation of an information ratchet and explores the relationship between speed, force, power, and efficiency with the ratchet output.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Lorna Binks, Chong Tian, Stephan D. P. Fielden, Inigo J. Vitorica-Yrezabal, David A. Leigh
Summary: We report a novel class of synthetic molecular pumps that utilize a stepwise information ratchet mechanism to achieve the kinetic gating required for sequestering macrcyclic substrates. These pumps thread rings onto a thread and enable the loading of different macrocydes in a desired sequence.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Martin J. Power, David T. J. Morris, Inigo J. Vitorica-Yrezabal, David A. . Leigh
Summary: Challenges in developing effective new superbases include synthesis ease, chemical stability, high basicity, and minimizing nucleophilicity. In this study, a new family of organic superbases called compact amine-crown ether rotaxanes are introduced, which exhibit desirable characteristics in all these aspects. These rotaxanes are synthesized using metal-free active template synthesis, have high basicity, low nucleophilicity, and show excellent stability and selectivity in reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Andrei S. Baluna, Albano Galan, David A. . Leigh, Gareth D. Smith, Justin T. J. Spence, Daniel J. Tetlow, Inigo J. Vitorica-Yrezabal, Min Zhang
Summary: We repeated the earliest claimed catenane synthesis reported by Wasserman over 60 years ago to investigate the formation of mechanically interlocked rings through a nontemplate, statistical synthesis. Using modern synthetic methods, we reconstructed Wasserman's deuterium-labeled macrocycle and other building blocks on a scale necessary to generate approximately 1 mg of catenane. We employed advanced spectroscopic and chemical techniques to detect, isolate, and prove the structure of a putative [2]catenane consisting of a 34-membered cyclic hydrocarbon mechanically linked with a 34-membered cyclic alpha-hydroxyketone.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Lorna Binks, Stefan Borsley, Todd R. Gingrich, David A. Leigh, Emanuele Penocchio, Benjamin M. W. Roberts
Summary: The study found that kinetic asymmetry determines the directionality of the information ratchets, while power strokes influence the performance and energy storage form. These findings have important implications for understanding biological ratchets and designing artificial molecular machines.
Article
Chemistry, Multidisciplinary
Andrei S. Baluna, Marcel Dommaschk, Burkhard Groh, Salma Kassem, David A. Leigh, Daniel J. Tetlow, Dean Thomas, Loli Varela Lopez
Summary: We report the synthesis and operation of a molecular energy ratchet that transports a crown ether from solution onto a thread, switching on pyrene fluorescence under UV irradiation. The system provides a potential signaling approach for artificial molecular machines.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Zoe Ashbridge, Stephen D. P. Fielden, David A. Leigh, Lucian Pirvu, Fredrik Schaufelberger, Liang Zhang
Summary: Entangling strands in an ordered manner can produce useful effects, and controlling the molecular knots can induce various properties and functions, such as allostery, anion binding, catalytic activity, chiral expression, and mechanical function. With advancements in synthetic accessibility of complex molecular topologies, they have the potential to play a significant role in molecular and materials design strategies.
CHEMICAL SOCIETY REVIEWS
(2022)