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Yu L, Xu Q, Sun Y, Wang Y, Tang Y, Yuan Q, Peng S, Wu G, Xiao Y, Zhou X. Programmable Lanthanide Metal-Organic Framework for Ultra-Efficient Nucleic Acids Extraction and Interaction Analysis. Anal Chem 2024; 96:11455-11462. [PMID: 38968402 DOI: 10.1021/acs.analchem.4c01839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2024]
Abstract
Efficient, mild, and reversible adsorption of nucleic acids onto nanomaterials represents a promising analytical approach for medical diagnosis. However, there is a scarcity of efficient and reversible nucleic acid adsorption nanomaterials. Additionally, the lack of comprehension of the molecular mechanisms governing their interactions poses significant challenges. These issues hinder the rational design and analytical applications of the nanomaterials. Herein, we propose an ultra-efficient nucleic acid affinity nanomaterial based on programmable lanthanide metal-organic frameworks (Ln-MOFs). Through experiments and density functional theory calculations, a rational design guideline for nucleic acid affinity of Ln-MOF was proposed, and a modular and flexible preparation scheme was provided. Then, Er-TPA (terephthalic acid) MOF emerged as the optimal candidate due to its pore size-independent adsorption and desorption capabilities for nucleic acids, enabling ultra-efficient adsorption (about 150% mass ratio) within 1 min. Furthermore, we elucidate the molecular-level mechanisms underlying the Ln-MOF adsorption of single- and double-stranded DNA and G4 structures. The affinity nanomaterial based on Ln-MOF exhibits robust nucleic acid extraction capability (4-fold higher than commercial reagent kits) and enables mild and reversible CRISPR/Cas9 functional regulation. This method holds significant promise for broad application in DNA/RNA liquid biopsy and gene editing, facilitating breakthroughs in analytical chemistry, pharmacy, and medical research.
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Affiliation(s)
- Long Yu
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Qi Xu
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Yuqing Sun
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
| | - Yuhao Wang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
| | - Yongling Tang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
| | - Qianqian Yuan
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Shuang Peng
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
| | - Gaosong Wu
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Yuxiu Xiao
- Department of Thyroid and Breast Surgery, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
| | - Xiang Zhou
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Department of Hematology of Zhongnan Hospital, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430072, China
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2
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Borsley S, Leigh DA, Roberts BMW. Molecular Ratchets and Kinetic Asymmetry: Giving Chemistry Direction. Angew Chem Int Ed Engl 2024; 63:e202400495. [PMID: 38568047 DOI: 10.1002/anie.202400495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Indexed: 05/03/2024]
Abstract
Over the last two decades ratchet mechanisms have transformed the understanding and design of stochastic molecular systems-biological, chemical and physical-in a move away from the mechanical macroscopic analogies that dominated thinking regarding molecular dynamics in the 1990s and early 2000s (e.g. pistons, springs, etc), to the more scale-relevant concepts that underpin out-of-equilibrium research in the molecular sciences today. Ratcheting has established molecular nanotechnology as a research frontier for energy transduction and metabolism, and has enabled the reverse engineering of biomolecular machinery, delivering insights into how molecules 'walk' and track-based synthesisers operate, how the acceleration of chemical reactions enables energy to be transduced by catalysts (both motor proteins and synthetic catalysts), and how dynamic systems can be driven away from equilibrium through catalysis. The recognition of molecular ratchet mechanisms in biology, and their invention in synthetic systems, is proving significant in areas as diverse as supramolecular chemistry, systems chemistry, dynamic covalent chemistry, DNA nanotechnology, polymer and materials science, molecular biology, heterogeneous catalysis, endergonic synthesis, the origin of life, and many other branches of chemical science. Put simply, ratchet mechanisms give chemistry direction. Kinetic asymmetry, the key feature of ratcheting, is the dynamic counterpart of structural asymmetry (i.e. chirality). Given the ubiquity of ratchet mechanisms in endergonic chemical processes in biology, and their significance for behaviour and function from systems to synthesis, it is surely just as fundamentally important. This Review charts the recognition, invention and development of molecular ratchets, focussing particularly on the role for which they were originally envisaged in chemistry, as design elements for molecular machinery. Different kinetically asymmetric systems are compared, and the consequences of their dynamic behaviour discussed. These archetypal examples demonstrate how chemical systems can be driven inexorably away from equilibrium, rather than relax towards it.
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Affiliation(s)
- Stefan Borsley
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL, Manchester, United Kingdom
| | - David A Leigh
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL, Manchester, United Kingdom
| | - Benjamin M W Roberts
- Department of Chemistry, The University of Manchester, Oxford Road, M13 9PL, Manchester, United Kingdom
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3
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Dey S, Aggarwal M, Chakraborty D, Mukherjee PS. Uncovering tetrazoles as building blocks for constructing discrete and polymeric assemblies. Chem Commun (Camb) 2024; 60:5573-5585. [PMID: 38738480 DOI: 10.1039/d4cc01616e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
Metal-organic self-assembly with flexible moieties is a budding field of research due to the possibility of the formation of unique architectures. Tetrazole, characterised by four nitrogen atoms in a five-member ring, exhibits immense potential as a component. Tetrazole offers four coordination sites for binding to the metal centre with nine distinct binding modes, leading to various assemblies. This review highlights different polymeric and discrete tetrazole-based assemblies and their functions. The meticulous manipulation of stoichiometry, ligands, and metal ions required for constructing discrete assemblies has also been discussed. The different applications of these architectures in separation, catalysis and detection have also been accentuated. The latter section of the review consolidates tetrazole-based cage composites, highlighting their applications in cell imaging and photocatalytic applications.
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Affiliation(s)
- Soumya Dey
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Medha Aggarwal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Debsena Chakraborty
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Partha Sarathi Mukherjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
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4
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Ma C, Li S, Zeng Y, Lyu Y. DNA-Based Molecular Machines: Controlling Mechanisms and Biosensing Applications. BIOSENSORS 2024; 14:236. [PMID: 38785710 PMCID: PMC11117991 DOI: 10.3390/bios14050236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/26/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024]
Abstract
The rise of DNA nanotechnology has driven the development of DNA-based molecular machines, which are capable of performing specific operations and tasks at the nanoscale. Benefitting from the programmability of DNA molecules and the predictability of DNA hybridization and strand displacement, DNA-based molecular machines can be designed with various structures and dynamic behaviors and have been implemented for wide applications in the field of biosensing due to their unique advantages. This review summarizes the reported controlling mechanisms of DNA-based molecular machines and introduces biosensing applications of DNA-based molecular machines in amplified detection, multiplex detection, real-time monitoring, spatial recognition detection, and single-molecule detection of biomarkers. The challenges and future directions of DNA-based molecular machines in biosensing are also discussed.
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Affiliation(s)
- Chunran Ma
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China; (C.M.); (S.L.); (Y.Z.)
| | - Shiquan Li
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China; (C.M.); (S.L.); (Y.Z.)
| | - Yuqi Zeng
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China; (C.M.); (S.L.); (Y.Z.)
| | - Yifan Lyu
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha 410082, China; (C.M.); (S.L.); (Y.Z.)
- Furong Laboratory, Changsha 410082, China
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5
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Wu B, Li ZW, Lin F, Tang R, Zhang W, Liu H, Ouyang G, Tan Y. The paradigm for exceptional iodine capture by nonporous amorphous electron-deficient cyclophanes. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133449. [PMID: 38218036 DOI: 10.1016/j.jhazmat.2024.133449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/23/2023] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
Nuclear power emerges as a beacon of hope in tackling the energy crisis. However, the emission of radioactive iodine originating from nuclear waste and accidents poses a serious danger to nature and human well-being. Therefore, it becomes imperative to urgently develop suitable adsorbents capable of iodine capture and long-term storage. It's generally recognized that achieving high iodine capture efficiency necessitates the presence of electron-rich pores/cavities that facilitate charge-transfer (CT) interactions, as well as effective sorption sites capable of engaging in lone pair interactions with iodine. In this study, an unprecedented iodine capture paradigm by nonporous amorphous electron-deficient tetracationic cycloalkanes in vapor and aqueous solutions is revealed, overturning preconceived notions of iodine trapping materials. A newly reported tetracationic cyclophane, BPy-Box4+, exhibited an exceptional iodine vapor sorption capacity of 3.99 g g-1, remarkable iodine removal efficiency in aqueous media, and outstanding reusability. The iodine capture mechanism is unambiguously elucidated by theoretical calculations and the single-crystal structures of cyclophanes with a gradual increase in iodine content, underlining the vital role of host-guest (1:1 or 1:2) interactions for the enhanced iodine capture. The current study demonstrates a new paradigm for enhanced iodine capture by nonporous amorphous electron-deficient cyclophanes through host-guest complexation.
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Affiliation(s)
- Baoqi Wu
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - Zhi-Wei Li
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Feng Lin
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - Rongzhi Tang
- School of Energy and Environment, City University of Hong Kong, Kowloon 999077, Hong Kong, China; Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China.
| | - Wanqing Zhang
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - Hongwei Liu
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
| | - Gangfeng Ouyang
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Yu Tan
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China.
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6
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Jin B, Yuan C, Guo JC, Wu YB. CBe 4H 6: a molecular rotor with a built-in on-off switch. NANOSCALE 2024; 16:4778-4786. [PMID: 38305072 DOI: 10.1039/d3nr05695c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
It is highly challenging to control (stop and resume as needed) molecular rotors because their intramolecular rotations are electronically enabled by delocalized σ bonding, and the desired control needs to be able to destroy and restore such σ bonding, which usually means difficult chemical manipulation (substitution or doping atom). In this work, we report CBe4H6, a molecular rotor that can be controlled independently of chemical manipulation. This molecule exhibited the uninterrupted free rotation of Be and H atoms around the central carbon in first-principles molecular dynamics simulations at high temperatures (600 and 1000 K), but the rotation cannot be witnessed in the simulation at room temperature (298 K). Specifically, when a C-H bond in the CBe4H6 molecule adopts the equatorial configuration at 298 K, it destroys the central delocalized σ bonding and blocks the intramolecular rotation (the rotor is turned "OFF"); when it can adopt the axial configuration at 600 and 1000 K, the central delocalized σ bonding can be restored and the intramolecular rotation can be resumed (the rotor is turned "ON"). Neutral CBe4H6 is thermodynamically favorable and electronically stable, as reflected by a wide HOMO-LUMO gap of 7.99 eV, a high vertical detachment energy of 9.79 eV, and a positive electron affinity of 0.24 eV, so it may be stable enough for the synthesis, not only in the gas phase, but also in the condensed phase.
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Affiliation(s)
- Bo Jin
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China.
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China
- Department of Chemistry, Xinzhou Normal University, 1 East Dunqi Street, Xinzhou, Shanxi, 034000, People's Republic of China
| | - Caixia Yuan
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China.
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China
| | - Jin-Chang Guo
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China.
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China
| | - Yan-Bo Wu
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China.
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi, 030006, People's Republic of China
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7
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Astumian RD. Kinetic Asymmetry and Directionality of Nonequilibrium Molecular Systems. Angew Chem Int Ed Engl 2024; 63:e202306569. [PMID: 38236163 DOI: 10.1002/anie.202306569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Indexed: 01/19/2024]
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 to a combination of photo- and thermally activated processes was reported in 1999. The progress in designing different molecular machines in the intervening years has been remarkable, with several outstanding examples appearing in the last few years. Despite the synthetic accomplishments, there remains confusion regarding the fundamental design principles by which the motions of molecules can be controlled, with significant intellectual tension between mechanical and chemical ways of thinking about and describing molecular machines. A thermodynamically consistent analysis of the kinetics of several molecular rotors and pumps shows that while light driven rotors operate by a power-stroke mechanism, kinetic asymmetry-the relative heights of energy barriers-is the sole determinant of the directionality of catalysis driven machines. Power-strokes-the relative depths of energy wells-play no role whatsoever in determining the sign of the directionality. These results, elaborated using trajectory thermodynamics and the nonequilibrium pump equality, show that kinetic asymmetry governs the response of many non-equilibrium chemical phenomena.
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Affiliation(s)
- Raymond Dean Astumian
- Department of Physics and Astronomy, The University of Maine, 5709 Bennett Hall, Orono, ME-04469, USA
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8
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Zwick P, Troncossi A, Borsley S, Vitorica-Yrezabal IJ, Leigh DA. Stepwise Operation of a Molecular Rotary Motor Driven by an Appel Reaction. J Am Chem Soc 2024; 146:4467-4472. [PMID: 38319727 PMCID: PMC10885133 DOI: 10.1021/jacs.3c10266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
To date, only a small number of chemistries and chemical fueling strategies have been successfully used to operate artificial molecular motors. Here, we report the 360° directionally biased rotation of phenyl groups about a C-C bond, driven by a stepwise Appel reaction sequence. The motor molecule consists of a biaryl-embedded phosphine oxide and phenol, in which full rotation around the biaryl bond is blocked by the P-O oxygen atom on the rotor being too bulky to pass the oxygen atom on the stator. Treatment with SOCl2 forms a cyclic oxyphosphonium salt (removing the oxygen atom of the phosphine oxide), temporarily linking the rotor with the stator. Conformational exchange via ring flipping then allows the rotor and stator to twist back and forth past the previous limit of rotation. Subsequently, the ring opening of the tethered intermediate with a chiral alcohol occurs preferentially through a nucleophilic attack on one face. Thus, the original phosphine oxide is reformed with net directional rotation about the biaryl bond over the course of the two-step reaction sequence. Each repetition of SOCl2-chiral alcohol additions generates another directionally biased rotation. Using the same reaction sequence on a derivative of the motor molecule that forms atropisomers rather than fully rotating 360° results in enantioenrichment, suggesting that, on average, the motor molecule rotates in the "wrong" direction once every three fueling cycles. The interconversion of phosphine oxides and cyclic oxyphosphonium groups to form temporary tethers that enable a rotational barrier to be overcome directionally adds to the strategies available for generating chemically fueled kinetic asymmetry in molecular systems.
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Affiliation(s)
- Patrick Zwick
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Axel Troncossi
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Stefan Borsley
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | | | - David A Leigh
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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9
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Shi K, Jia G, Wu Y, Zhang S, Chen J. Dynamic control of circumrotation of a [2]catenane by acid-base switching. ChemistryOpen 2024:e202300304. [PMID: 38333963 DOI: 10.1002/open.202300304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/24/2024] [Indexed: 02/10/2024] Open
Abstract
Dynamic control of the motion in a catenane remains a big challenge as it requires precise design and sophisticated well-organized structures. This paper reports the design and synthesis of a donor-acceptor [2]catenane through mechanical interlocking, employing a crown ether featuring two dibenzylammonium salts on its side arms as the host and a cyclobis(paraquat-p-phenylene) (CBPQT ⋅ 4PF6 ) ring as the guest molecule. By addition of external acid or base, the catenane can form self-complexed or decomplexed compounds to alter the cavity size of the crown ether ring, consequently affecting circumrotation rate of CBPQT ⋅ 4PF6 ring of the catenane. This study offers insights for the design and exploration of artificial molecular machines with intricate cascading responsive mechanisms.
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Affiliation(s)
- Kelun Shi
- SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, Guangzhou, 510006, P. R. China
| | - Guohui Jia
- SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, Guangzhou, 510006, P. R. China
| | - Ying Wu
- SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, Guangzhou, 510006, P. R. China
| | - Shilong Zhang
- SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, Guangzhou, 510006, P. R. China
| | - Jiawen Chen
- SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, Guangzhou, 510006, P. R. China
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10
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Zhu QL, Liu W, Khoruzhenko O, Breu J, Hong W, Zheng Q, Wu ZL. Animating hydrogel knotbots with topology-invoked self-regulation. Nat Commun 2024; 15:300. [PMID: 38182606 PMCID: PMC10770334 DOI: 10.1038/s41467-023-44608-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 12/21/2023] [Indexed: 01/07/2024] Open
Abstract
Steering soft robots in a self-regulated manner remains a grand challenge, which often requires continuous symmetry breaking and recovery steps for persistent motion. Although structural morphology is found significant for robotic functions, geometric topology has rarely been considered and appreciated. Here we demonstrate a series of knotbots, namely hydrogel-based robots with knotted structures, capable of autonomous rolling and spinning/rotating motions. With symmetry broken by external stimuli and restored by self-regulation, the coupling between self-constraint-induced prestress and photothermal strain animates the knotbots continuously. Experiments and simulations reveal that nonequilibrium processes are regulated dynamically and cooperatively by self-constraints, active deformations, and self-shadowing effect of the photo-responsive gel. The active motions enable the knotbots to execute tasks including gear rotation and rod climbing. This work paves the way to devise advanced soft robots with self-regulated sustainable motions by harnessing the topology.
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Affiliation(s)
- Qing Li Zhu
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310058, Hangzhou, China
| | - Weixuan Liu
- Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, 518055, Shenzhen, China
| | - Olena Khoruzhenko
- Bavarian Polymer Institute and Department of Chemistry, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
| | - Josef Breu
- Bavarian Polymer Institute and Department of Chemistry, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
| | - Wei Hong
- Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, 518055, Shenzhen, China.
| | - Qiang Zheng
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310058, Hangzhou, China.
| | - Zi Liang Wu
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310058, Hangzhou, China.
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11
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Borsley S, Gallagher JM, Leigh DA, Roberts BMW. Ratcheting synthesis. Nat Rev Chem 2024; 8:8-29. [PMID: 38102412 DOI: 10.1038/s41570-023-00558-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2023] [Indexed: 12/17/2023]
Abstract
Synthetic chemistry has traditionally relied on reactions between reactants of high chemical potential and transformations that proceed energetically downhill to either a global or local minimum (thermodynamic or kinetic control). Catalysts can be used to manipulate kinetic control, lowering activation energies to influence reaction outcomes. However, such chemistry is still constrained by the shape of one-dimensional reaction coordinates. Coupling synthesis to an orthogonal energy input can allow ratcheting of chemical reaction outcomes, reminiscent of the ways that molecular machines ratchet random thermal motion to bias conformational dynamics. This fundamentally distinct approach to synthesis allows multi-dimensional potential energy surfaces to be navigated, enabling reaction outcomes that cannot be achieved under conventional kinetic or thermodynamic control. In this Review, we discuss how ratcheted synthesis is ubiquitous throughout biology and consider how chemists might harness ratchet mechanisms to accelerate catalysis, drive chemical reactions uphill and programme complex reaction sequences.
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Affiliation(s)
- Stefan Borsley
- Department of Chemistry, University of Manchester, Manchester, UK
| | | | - David A Leigh
- Department of Chemistry, University of Manchester, Manchester, UK.
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12
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Baluna A, Dommaschk M, Groh B, Kassem S, Leigh DA, Tetlow DJ, Thomas D, Varela López L. Switched "On" Transient Fluorescence Output from a Pulsed-Fuel Molecular Ratchet. J Am Chem Soc 2023; 145:27113-27119. [PMID: 38047919 PMCID: PMC10722508 DOI: 10.1021/jacs.3c11290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 12/05/2023]
Abstract
We report the synthesis and operation of a molecular energy ratchet that transports a crown ether from solution onto a thread, along the axle, over a fluorophore, and off the other end of the thread back into bulk solution, all in response to a single pulse of a chemical fuel (CCl3CO2H). The fluorophore is a pyrene residue whose fluorescence is normally prevented by photoinduced electron transfer (PET) to a nearby N-methyltriazolium group. However, crown ether binding to the N-methyltriazolium site inhibits the PET, switching on pyrene fluorescence under UV irradiation. Each pulse of fuel results in a single ratchet cycle of transient fluorescence (encompassing threading, transport to the N-methyltriazolium site, and then dethreading), with the onset of the fluorescent time period determined by the amount of fuel in each pulse and the end-point determined by the concentration of the reagents for the disulfide exchange reaction. The system provides a potential alternative signaling approach for artificial molecular machines that read symbols from sequence-encoded molecular tapes.
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Affiliation(s)
- Andrei
S. Baluna
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Marcel Dommaschk
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Burkhard Groh
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Salma Kassem
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - David A. Leigh
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Daniel J. Tetlow
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Dean Thomas
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Loli Varela López
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
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13
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Zeng X, Yang M, Liu H, Zhang Z, Hu Y, Shi J, Wang ZH. Light-driven micro/nanomotors in biomedical applications. NANOSCALE 2023; 15:18550-18570. [PMID: 37962424 DOI: 10.1039/d3nr03760f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Nanotechnology brings hope for targeted drug delivery. However, most current drug delivery systems use passive delivery strategies with limited therapeutic efficiency. Over the past two decades, research on micro/nanomotors (MNMs) has flourished in the biomedical field. Compared with other driven methods, light-driven MNMs have the advantages of being reversible, simple to control, clean, and efficient. Under light irradiation, the MNMs can overcome several barriers in the body and show great potential in the treatment of various diseases, such as tumors, and gastrointestinal, cardiovascular and cerebrovascular diseases. Herein, the classification and mechanism of light-driven MNMs are introduced briefly. Subsequently, the applications of light-driven MNMs in overcoming physiological and pathological barriers in the past five years are highlighted. Finally, the future prospects and challenges of light-driven MNMs are discussed as well. This review will provide inspiration and direction for light-driven MNMs to overcome biological barriers in vivo and promote the clinical application of light-driven MNMs in the biomedical field.
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Affiliation(s)
- Xuejiao Zeng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
| | - Mingzhu Yang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
| | - Hua Liu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
| | - Zhenzhong Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
- State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou, 450001, China
| | - Yurong Hu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
- State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou, 450001, China
| | - Jinjin Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
- State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou, 450001, China
| | - Zhi-Hao Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- Henan Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou, 450001, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou, 450001, China
- State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou, 450001, China
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14
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Thaggard GC, Park KC, Lim J, Maldeni Kankanamalage BKP, Haimerl J, Wilson GR, McBride MK, Forrester KL, Adelson ER, Arnold VS, Wetthasinghe ST, Rassolov VA, Smith MD, Sosnin D, Aprahamian I, Karmakar M, Bag SK, Thakur A, Zhang M, Tang BZ, Castaño JA, Chaur MN, Lerch MM, Fischer RA, Aizenberg J, Herges R, Lehn JM, Shustova NB. Breaking the photoswitch speed limit. Nat Commun 2023; 14:7556. [PMID: 37985777 PMCID: PMC10660956 DOI: 10.1038/s41467-023-43405-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/07/2023] [Indexed: 11/22/2023] Open
Abstract
The forthcoming generation of materials, including artificial muscles, recyclable and healable systems, photochromic heterogeneous catalysts, or tailorable supercapacitors, relies on the fundamental concept of rapid switching between two or more discrete forms in the solid state. Herein, we report a breakthrough in the "speed limit" of photochromic molecules on the example of sterically-demanding spiropyran derivatives through their integration within solvent-free confined space, allowing for engineering of the photoresponsive moiety environment and tailoring their photoisomerization rates. The presented conceptual approach realized through construction of the spiropyran environment results in ~1000 times switching enhancement even in the solid state compared to its behavior in solution, setting a record in the field of photochromic compounds. Moreover, integration of two distinct photochromic moieties in the same framework provided access to a dynamic range of rates as well as complementary switching in the material's optical profile, uncovering a previously inaccessible pathway for interstate rapid photoisomerization.
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Affiliation(s)
- Grace C Thaggard
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Kyoung Chul Park
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Jaewoong Lim
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | | | - Johanna Haimerl
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
- Chair of Inorganic and Metal-Organic Chemistry, Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Gina R Wilson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Margaret K McBride
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Kelly L Forrester
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Esther R Adelson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Virginia S Arnold
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Shehani T Wetthasinghe
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Vitaly A Rassolov
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Mark D Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA
| | - Daniil Sosnin
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Ivan Aprahamian
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA
| | - Manisha Karmakar
- Department of Chemistry, Jadavpur University, 700032, Kolkata, India
| | - Sayan Kumar Bag
- Department of Chemistry, Jadavpur University, 700032, Kolkata, India
| | - Arunabha Thakur
- Department of Chemistry, Jadavpur University, 700032, Kolkata, India
| | - Minjie Zhang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, and Guangdong-Hong Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional Materials, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Ben Zhong Tang
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, and Guangdong-Hong Kong-Macau Joint Laboratory of Optoelectronic and Magnetic Functional Materials, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, China
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong Shenzhen, Guangdong, 518172, China
- Center for Aggregation-Induced Emission, South China University of Technology, Guangzhou, 510640, China
- AIE Institute, Guangzhou Development District, Huangpu, Guangzhou, 510530, China
| | - Jorge A Castaño
- Departamento de Química, Universidad del Valle, AA 25360, Cali, Colombia
| | - Manuel N Chaur
- Departamento de Química, Universidad del Valle, AA 25360, Cali, Colombia
- Centro de Excelencia en Neuvos Materiales (CENM), Universidad del Valle, AA 25360, Cali, Colombia
| | - Michael M Lerch
- Stratingh Institute for Chemistry, University of Groningen, 9747 AG, Groningen, The Netherlands
| | - Roland A Fischer
- Chair of Inorganic and Metal-Organic Chemistry, Department of Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Joanna Aizenberg
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Rainer Herges
- Otto Diels Institute of Organic Chemistry, University of Kiel, 24118, Kiel, Germany
| | - Jean-Marie Lehn
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires (ISIS), Université de Strasbourg, 67000, Strasbourg, France
| | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina, 29208, USA.
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15
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Sangchai T, Al Shehimy S, Penocchio E, Ragazzon G. Artificial Molecular Ratchets: Tools Enabling Endergonic Processes. Angew Chem Int Ed Engl 2023; 62:e202309501. [PMID: 37545196 DOI: 10.1002/anie.202309501] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/08/2023]
Abstract
Non-equilibrium chemical systems underpin multiple domains of contemporary interest, including supramolecular chemistry, molecular machines, systems chemistry, prebiotic chemistry, and energy transduction. Experimental chemists are now pioneering the realization of artificial systems that can harvest energy away from equilibrium. In this tutorial Review, we provide an overview of artificial molecular ratchets: the chemical mechanisms enabling energy absorption from the environment. By focusing on the mechanism type-rather than the application domain or energy source-we offer a unifying picture of seemingly disparate phenomena, which we hope will foster progress in this fascinating domain of science.
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Affiliation(s)
- Thitiporn Sangchai
- University of Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires (ISIS) UMR 7006, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Shaymaa Al Shehimy
- University of Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires (ISIS) UMR 7006, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Emanuele Penocchio
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Giulio Ragazzon
- University of Strasbourg, CNRS, Institut de Science et d'Ingénierie Supramoléculaires (ISIS) UMR 7006, 8 allée Gaspard Monge, 67000, Strasbourg, France
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16
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Jensen SK, Neumann MS, Frederiksen R, Skavenborg ML, Larsen MC, Wessel SE, Jeppesen JO. Mechanistic studies of isomeric [2]rotaxanes consisting of two different tetrathiafulvalene units reveal that the movement of cyclobis(paraquat- p-phenylene) can be controlled. Chem Sci 2023; 14:12366-12378. [PMID: 37969595 PMCID: PMC10631196 DOI: 10.1039/d3sc04408d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/23/2023] [Indexed: 11/17/2023] Open
Abstract
Controlling the movement in artificial molecular machines is a key challenge that needs to be solved before their full potential can be harnessed. In this study, two isomeric tri-stable [2]rotaxanes 1·4PF6 and 2·4PF6 incorporating both a tetrathiafulvalene (TTF) and a monopyrrolotetrathiafulvalene (MPTTF) unit in the dumbbell component have been synthesised to measure the energy barriers when the tetracationic cyclobis(paraquat-p-phenylene) (CBPQT4+) ring moves across either a TTF2+ or an MPTTF2+ dication. By strategically exchanging one of the thiomethyl barriers on either the TTF unit or the MPTTF unit with the bulkier thioethyl group, the movement of the CBPQT4+ ring in 14+ and 24+ can be controlled to take place in only one direction upon tetra-oxidation. Cyclic voltammetry and 1H NMR spectroscopy were used to investigate the switching mechanism and it was found that upon tetra-oxidation of 14+ and 24+, the CBPQT4+ ring moves first to a position where it is located between the TTF2+ and MPTTF2+ dications producing high-energy co-conformations which slowly interconvert into thermodynamically more stable co-conformations. The kinetics of the movement occurring in the tetra-oxidised [2]rotaxanes 18+ and 28+ were studied at different temperatures allowing the free energy of the transition state, when CBPQT4+ moves across TTF2+ (21.5 kcal mol-1) and MPTTF2+ (20.3 kcal mol-1) at 298 K, to be determined. These results demonstrate for the first time that the combination of a TTF and an MPTTF unit can be used to induce directional movement of the CBPQT4+ ring in molecular machines with a 90% efficiency.
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Affiliation(s)
- Sofie K Jensen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Mathias S Neumann
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Rikke Frederiksen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Mathias L Skavenborg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Mads C Larsen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Stinne E Wessel
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
| | - Jan O Jeppesen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55 5230 Odense Denmark
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17
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Shan Y, Zhang Q, Sheng J, Stuart MCA, Qu DH, Feringa BL. Motorized Photomodulator: Making A Non-photoresponsive Supramolecular Gel Switchable by Light. Angew Chem Int Ed Engl 2023; 62:e202310582. [PMID: 37681477 DOI: 10.1002/anie.202310582] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 09/09/2023]
Abstract
Introducing photo-responsive molecules offers an attractive approach for remote and selective control and dynamic manipulation of material properties. However, it remains highly challenging how to use a minimal amount of photo-responsive units to optically modulate materials that are inherently inert to light irradiation. Here we show the application of a light-driven rotary molecular motor as a "motorized photo-modulator" to endow a typical H-bond-based gel system with the ability to respond to light irradiation and create a reversible sol-gel transition. The key molecular design feature is the introduction of a minimal amount (2 mol %) of molecular motors into the supramolecular network as photo-switchable non-covalent crosslinkers. Advantage is taken of the subtle interplay of the large geometry change during photo-isomerization of the molecular motor guest and the dynamic nature of a supramolecular gel host system. As a result, a tiny amount of molecular motors is enough to switch the mechanical modulus of the entire supramolecular systems. This study proves the concept of designing photo-responsive materials with minimum use of non-covalent light-absorbing units.
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Affiliation(s)
- Yahan Shan
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Qi Zhang
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Jinyu Sheng
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Marc C A Stuart
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Da-Hui Qu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Ben L Feringa
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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18
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Kermagoret A, Bardelang D. The Diversity of Cucurbituril Molecular Switches and Shuttles. Chemistry 2023:e202302114. [PMID: 37725407 DOI: 10.1002/chem.202302114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/21/2023]
Abstract
Ring translocation switches and shuttles featuring a macrocycle (or a ring molecule) navigating between two or more stations continue to attract attention. While the vast majority of these systems are developed in organic solvents, the cucurbituril (CB) macrocycles are ideally suited to prepare such systems in water. Indeed, their stability and their relatively high affinity for relevant guest molecules are key attributes toward translating the progresses made in organic solvents, into water. This concept article summarizes the findings, key advances and multiple possibilities offered by CBs toward advanced molecular switches and shuttles in water.
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19
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Han H, Huang Y, Tang C, Liu Y, Krzyaniak MD, Song B, Li X, Wu G, Wu Y, Zhang R, Jiao Y, Zhao X, Chen XY, Wu H, Stern CL, Ma Y, Qiu Y, Wasielewski MR, Stoddart JF. Spin-Frustrated Trisradical Trication of PrismCage. J Am Chem Soc 2023; 145:18402-18413. [PMID: 37578165 DOI: 10.1021/jacs.3c04340] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Organic trisradicals featuring threefold symmetry have attracted significant interest because of their unique magnetic properties associated with spin frustration. Herein, we describe the synthesis and characterization of a triangular prism-shaped organic cage for which we have coined the name PrismCage6+ and its trisradical trication─TR3(•+). PrismCage6+ is composed of three 4,4'-bipyridinium dications and two 1,3,5-phenylene units bridged by six methylene groups. In the solid state, PrismCage6+ adopts a highly twisted conformation with close to C3 symmetry as a result of encapsulating one PF6- anion as a guest. PrismCage6+ undergoes stepwise reduction to its mono-, di-, and trisradical cations in MeCN on account of strong electronic communication between its 4,4'-bipyridinium units. TR3(•+), which is obtained by the reduction of PrismCage6+ employing CoCp2, adopts a triangular prism-shaped conformation with close to C2v symmetry in the solid state. Temperature-dependent continuous-wave and nutation-frequency-selective electron paramagnetic resonance spectra of TR3(•+) in frozen N,N-dimethylformamide indicate its doublet ground state. The doublet-quartet energy gap of TR3(•+) is estimated to be -0.08 kcal mol-1, and the critical temperature of spin-state conversion is found to be ca. 50 K, suggesting that it displays pronounced spin frustration at the molecular level. To the best of our knowledge, this example is the first organic radical cage to exhibit spin frustration. The trisradical trication of PrismCage6+ opens up new possibilities for fundamental investigations and potential applications in the fields of both organic cages and spin chemistry.
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Affiliation(s)
- Han Han
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yuheng Huang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Center for Molecular Quantum Transduction, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Institute for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208, United States
| | - Chun Tang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yiming Liu
- Beijing National Laboratory for Molecular Sciences, Centre for the Soft Matter Science and Engineering, The Key Lab of Polymer Chemistry & Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Matthew D Krzyaniak
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Center for Molecular Quantum Transduction, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Institute for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208, United States
| | - Bo Song
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xuesong Li
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Guangcheng Wu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yong Wu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Ruihua Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yang Jiao
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xingang Zhao
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xiao-Yang Chen
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Huang Wu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Charlotte L Stern
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Yuguo Ma
- Beijing National Laboratory for Molecular Sciences, Centre for the Soft Matter Science and Engineering, The Key Lab of Polymer Chemistry & Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yunyan Qiu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore
| | - Michael R Wasielewski
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Center for Molecular Quantum Transduction, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Institute for Sustainability and Energy at Northwestern, Northwestern University, Evanston, Illinois 60208, United States
| | - J Fraser Stoddart
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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20
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Vogel J, Chen Y, Fadler RE, Flood AH, von Delius M. Steric Control over the Threading of Pyrophosphonates with One or Two Cyanostar Macrocycles during Pseudorotaxane Formation. Chemistry 2023; 29:e202300899. [PMID: 37156722 PMCID: PMC10655069 DOI: 10.1002/chem.202300899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/01/2023] [Accepted: 05/08/2023] [Indexed: 05/10/2023]
Abstract
The supramolecular recognition of anions is increasingly harnessed to achieve the self-assembly of supramolecular architectures, ranging from cages and polymers to (pseudo)rotaxanes. The cyanostar (CS) macrocycle has previously been shown to form 2 : 1 complexes with organophosphate anions that can be turned into [3]rotaxanes by stoppering. Here we achieved steric control over the assembly of pseudorotaxanes comprising the cyanostar macrocycle and a thread that is based, for the first time, on organo-pyrophosphonates. Subtle differences in steric bulk on the threads allowed formation of either [3]pseudorotaxanes or [2]pseudorotaxanes. We demonstrate that the threading kinetics are governed by the steric demand of the organo-pyrophosphonates and in one case, slows down to the timescale of minutes. Calculations show that the dianions are sterically offset inside the macrocycles. Our findings broaden the scope of cyanostar-anion assemblies and may have relevance for the design of molecular machines whose directionality is a result of relatively slow slipping.
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Affiliation(s)
- Julian Vogel
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Yusheng Chen
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Rachel E Fadler
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Amar H Flood
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Max von Delius
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
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21
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Xiao X, Xiao D, Sheng G, Shan T, Wang J, Miao X, Liu Y, Li G, Zhu Y, Sessler JL, Huang F. Formation of polyrotaxane crystals driven by dative boron-nitrogen bonds. SCIENCE ADVANCES 2023; 9:eadi1169. [PMID: 37406124 DOI: 10.1126/sciadv.adi1169] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/31/2023] [Indexed: 07/07/2023]
Abstract
The integration of mechanically interlocked molecules (MIMs) into purely organic crystalline materials is expected to produce materials with properties that are not accessible using more classic approaches. To date, this integration has proved elusive. We present a dative boron-nitrogen bond-driven self-assembly strategy that allows for the preparation of polyrotaxane crystals. The polyrotaxane nature of the crystalline material was confirmed by both single-crystal x-ray diffraction analysis and cryogenic high-resolution low-dose transmission electron microscopy. Enhanced softness and greater elasticity are seen for the polyrotaxane crystals than for nonrotaxane polymer controls. This finding is rationalized in terms of the synergetic microscopic motion of the rotaxane subunits. The present work thus highlights the benefits of integrating MIMs into crystalline materials.
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Affiliation(s)
- Xuedong Xiao
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Ding Xiao
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Guan Sheng
- Center for Electron Microscopy, Institute for Frontier and Interdisciplinary Sciences, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Tianyu Shan
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Jiao Wang
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Xiaohe Miao
- Instrumentation and Service Center for Physical Sciences, Westlake University, Hangzhou 310024, P. R. China
| | - Yikuan Liu
- Center for Electron Microscopy, Institute for Frontier and Interdisciplinary Sciences, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Guangfeng Li
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Yihan Zhu
- Center for Electron Microscopy, Institute for Frontier and Interdisciplinary Sciences, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jonathan L Sessler
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712-1224, USA
| | - Feihe Huang
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center-Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Joint Lab, Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
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22
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Bilancioni M, Esposito M, Penocchio E. A [3]-catenane non-autonomous molecular motor model: Geometric phase, no-pumping theorem, and energy transduction. J Chem Phys 2023; 158:224104. [PMID: 37310874 DOI: 10.1063/5.0151625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/17/2023] [Indexed: 06/15/2023] Open
Abstract
We study a model of a synthetic molecular motor-a [3]-catenane consisting of two small macrocycles mechanically interlocked with a bigger one-subjected to time-dependent driving using stochastic thermodynamics. The model presents nontrivial features due to the two interacting small macrocycles but is simple enough to be treated analytically in limiting regimes. Among the results obtained, we find a mapping into an equivalent [2]-catenane that reveals the implications of the no-pumping theorem stating that to generate net motion of the small macrocycles, both energies and barriers need to change. In the adiabatic limit (slow driving), we fully characterize the motor's dynamics and show that the net motion of the small macrocycles is expressed as a surface integral in parameter space, which corrects previous erroneous results. We also analyze the performance of the motor subjected to step-wise driving protocols in the absence and presence of an applied load. Optimization strategies for generating large currents and maximizing free energy transduction are proposed. This simple model provides interesting clues into the working principles of non-autonomous molecular motors and their optimization.
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Affiliation(s)
- Massimo Bilancioni
- Department of Physics and Materials Science, University of Luxembourg, Luxembourg City 1511, Luxembourg
| | - Massimiliano Esposito
- Department of Physics and Materials Science, University of Luxembourg, Luxembourg City 1511, Luxembourg
| | - Emanuele Penocchio
- Department of Physics and Materials Science, University of Luxembourg, Luxembourg City 1511, Luxembourg
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
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23
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Hum G, Phang SJI, Ong HC, León F, Quek S, Khoo YXJ, Li C, Li Y, Clegg JK, Díaz J, Stuparu MC, García F. Main Group Molecular Switches with Swivel Bifurcated to Trifurcated Hydrogen Bond Mode of Action. J Am Chem Soc 2023. [PMID: 37267593 DOI: 10.1021/jacs.2c12713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Artificial molecular machines have captured the full attention of the scientific community since Jean-Pierre Sauvage, Fraser Stoddart, and Ben Feringa were awarded the 2016 Nobel Prize in Chemistry. The past and current developments in molecular machinery (rotaxanes, rotors, and switches) primarily rely on organic-based compounds as molecular building blocks for their assembly and future development. In contrast, the main group chemical space has not been traditionally part of the molecular machine domain. The oxidation states and valency ranges within the p-block provide a tremendous wealth of structures with various chemical properties. Such chemical diversity─when implemented in molecular machines─could become a transformative force in the field. Within this context, we have rationally designed a series of NH-bridged acyclic dimeric cyclodiphosphazane species, [(μ-NH){PE(μ-NtBu)2PE(NHtBu)}2] (E = O and S), bis-PV2N2, displaying bimodal bifurcated R21(8) and trifurcated R31(8,8) hydrogen bonding motifs. The reported species reversibly switch their topological arrangement in the presence and absence of anions. Our results underscore these species as versatile building blocks for molecular machines and switches, as well as supramolecular chemistry and crystal engineering based on cyclophosphazane frameworks.
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Affiliation(s)
- Gavin Hum
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Si Jia Isabel Phang
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - How Chee Ong
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felix León
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Shina Quek
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yi Xin Joycelyn Khoo
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Chenfei Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yongxin Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Jack K Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, Cooper Road, St Lucia 4072, Queensland, Australia
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria Extremadura, Avda de la Universidad s/n, Cáceres 10003, Spain
| | - Mihaiela C Stuparu
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felipe García
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Claveria 8, Oviedo 33006, Asturias, Spain
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
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24
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Li N, Sun M, Cao S. OPA, TPA and ECD spectra of π-conjugated interlocked chiral nanocarbons. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 300:122949. [PMID: 37270974 DOI: 10.1016/j.saa.2023.122949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/25/2023] [Accepted: 05/27/2023] [Indexed: 06/06/2023]
Abstract
This paper presents a theoretical investigation of the optical absorption and molecular chirality of π-conjugated mechanically interlocked nanocarbons, using one photon absorption (OPA) and two photon absorption (TPA) as well as electronic circular dichroism (ECD) spectra. Our findings reveal the optical excitation properties of mechanically interlocked molecules (MIMs) and chirality resulting from interlocked mechanical bonds. While OPA spectra are unable to distinguish interlocked molecules from non-interlocked molecules, we demonstrate that TPA and ECD can effectively discriminate between them, and can also differentiate [2]catenanes from [3]catenanes. Thus, we propose new methods to identify interlocked mechanical bonds. Our results provide physical insight into the optical properties and absolute configuration of π-conjugated interlocked chiral nanocarbons.
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Affiliation(s)
- Ning Li
- School of Physics, Liaoning University, Shenyang 110036, PR China; School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Mengtao Sun
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Shuo Cao
- School of Physics, Liaoning University, Shenyang 110036, PR China.
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25
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Lu Z, Lv W, Liu H, Liu Y, Liao S, Wang X, Zhu K. ProBox: A Rigid yet Dynamic Cyclophane Capable of Adaptive and Redox-Switchable Host-Guest Binding. Org Lett 2023; 25:3508-3511. [PMID: 37154438 DOI: 10.1021/acs.orglett.3c01092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A pyrrolodithiin-derived box-like cyclophane (ProBox), featuring an adaptive geometry with stimuli-responsiveness, was designed and successfully constructed. The dynamic and foldable dithiin subunit endowed the cyclophane with a compressible cavity which can transform from a hex-nut geometry to a nearly rectangular box upon complexing guests with various sizes and shapes. The resulting pseudorotaxane complexes could be dethreaded via electrochemical oxidation. Such an adaptive cavity along with redox-switchable host-guest binding of ProBox could enable further applications in complex molecular switches and machines.
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Affiliation(s)
- Zonghuan Lu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Wanqian Lv
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Hongyi Liu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Yandie Liu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Shuhua Liao
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Xijie Wang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Kelong Zhu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
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26
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Neumann MS, Smith AF, Jensen SK, Frederiksen R, Skavenborg ML, Jeppesen JO. Evaluating the energy landscape of an out-of-equilibrium bistable [2]rotaxane containing monopyrrolotetrathiafulvalene. Chem Commun (Camb) 2023; 59:6335-6338. [PMID: 37067575 DOI: 10.1039/d3cc00360d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
The unique redox properties of monopyrrolotetrathiafulvalene can be used to induce directional movement in interlocked molecules. In this study, the kinetics for the directional movement of cyclobis(paraquat-p-phenylene) across the dioxidised monopyrrolotetrathiafulvalene in a [2]rotaxane is quantified by time-resolved 1H NMR spectroscopy.
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Affiliation(s)
- Mathias S Neumann
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
| | - Amanda F Smith
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
| | - Sofie K Jensen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
| | - Rikke Frederiksen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
| | - Mathias L Skavenborg
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
| | - Jan O Jeppesen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
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27
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Witte JF, Wasternack J, Wei S, Schalley CA, Paulus B. The Interplay of Weakly Coordinating Anions and the Mechanical Bond: A Systematic Study of the Explicit Influence of Counterions on the Properties of (Pseudo)rotaxanes. Molecules 2023; 28:molecules28073077. [PMID: 37049840 PMCID: PMC10096450 DOI: 10.3390/molecules28073077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Weakly coordinating anions (WCAs) have attracted much attention in recent years due to their ability to stabilise highly reactive cations. It may well be argued, however, that a profound understanding of what truly defines a WCA is still lacking, and systematic studies to unravel counterion effects are scarce. In this work, we investigate a supramolecular pseudorotaxane formation reaction, subject to a selection of anions, ranging from strongly to weakly coordinating, which not only aids in fostering our knowledge about anion coordination properties, but also provides valuable theoretical insight into the nature of the mechanical bond. We employ state-of-the-art DFT-based methods and tools, combined with isothermal calorimetry and 1H NMR experiments, to compute anion-dependent Gibbs free association energies ΔGa, as well as to evaluate intermolecular interactions. We find correlations between ΔGa and the anions’ solvation energies, which are exploited to calculate physico-chemical reaction parameters in the context of coordinating anions. Furthermore, we show that the binding situation within the (pseudo)rotaxanes can be mostly understood by straight-forward electrostatic considerations. However, quantum-chemical effects such as dispersion and charge-transfer interactions become more and more relevant when WCAs are employed.
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Affiliation(s)
- J. Felix Witte
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
- Correspondence: (J.F.W.); (B.P.)
| | - Janos Wasternack
- Institut für Chemie und Biochemie, Organische Chemie, Freie Universität Berlin, Arnimallee 20, 14195 Berlin, Germany
| | - Shenquan Wei
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Christoph A. Schalley
- Institut für Chemie und Biochemie, Organische Chemie, Freie Universität Berlin, Arnimallee 20, 14195 Berlin, Germany
| | - Beate Paulus
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
- Correspondence: (J.F.W.); (B.P.)
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