1
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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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2
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Xu WL, Zhang RX, Wang H, Chen J, Zhou L. Helicoselective Synthesis of Indolohelicenoids through Organocatalytic Central-to-Helical Chirality Conversion. Angew Chem Int Ed Engl 2024; 63:e202318021. [PMID: 38196108 DOI: 10.1002/anie.202318021] [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: 11/25/2023] [Revised: 01/03/2024] [Accepted: 01/09/2024] [Indexed: 01/11/2024]
Abstract
We report the helicoselective and convergent construction of indolohelicenoids with excellent efficiency and stereocontrol. This reaction proceeds through a chiral-phosphoric-acid-catalyzed enantioselective cycloaddition and eliminative aromatization sequence, which can be finely controlled by adjusting the reaction temperature. Mechanistic studies reveal that the chiral phosphoric acid cooperatively serves as both a bifunctional and Brønsted acid catalyst, enabling one-pot central-to-helical chirality conversion. Additionally, the optical properties of the synthesized indolohelicenoids were characterized to explore their potential applications in organic photoelectric materials.
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Affiliation(s)
- Wen-Lei Xu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, 471934, P. R. China
| | - Ru-Xia Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Hui Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China
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3
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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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4
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Liu X, Zhu B, Zhang X, Zhu H, Zhang J, Chu A, Wang F, Wang R. Enantioselective synthesis of [4]helicenes by organocatalyzed intermolecular C-H amination. Nat Commun 2024; 15:732. [PMID: 38272928 PMCID: PMC10810882 DOI: 10.1038/s41467-024-45049-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: 07/18/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024] Open
Abstract
Catalytic asymmetric synthesis of helically chiral molecules has remained an outstanding challenge and witnessed fairly limited progress in the past decades. Current methods to construct such compounds almost entirely rely on catalytic enantiocontrolled fused-ring system extension. Herein, we report a direct terminal peri-functionalization strategy, which allows for efficient assembling of 1,12-disubstituted [4]carbohelicenes via an organocatalyzed enantioselective amination reaction of 2-hydroxybenzo[c]phenanthrene derivates with diazodicarboxamides. The key feature of this approach is that the stereochemical information of the catalyst could be transferred into not only the helix sense but also the remote C-N axial chirality of the products, thus enabling the synthesis of [4]- and [5]helicenes with both structural diversity and stereochemical complexity in good efficiency and excellent enantiocontrol. Besides, the large-scale preparations and representative transformations of the helical products further demonstrate the practicality of this protocol. Moreover, DFT calculations reveal that both the hydrogen bonds and the C-H---π interactions between the substrates and catalyst contribute to the ideal stereochemical control.
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Affiliation(s)
- Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
| | - Boyan Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Xiaoyong Zhang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, 518107, Shenzhen, China
| | - Hanwen Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Jingying Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Anqi Chu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Fujun Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences & Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, 730000, Lanzhou, China.
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5
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Hashmi Y, Thongpanchang T. Synthesis and Properties of Bis(naphthofuran)‐Fused [7]Helicene Derivatives. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yuttawat Hashmi
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Tienthong Thongpanchang
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC) Faculty of Science Mahidol University Rama 6 Road Bangkok 10400 Thailand
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6
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Synthesis, spectral characterization and fluorescence study of functional [5]Helicene derivatives: Experimental and theoretical investigation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Mondal A, Toyoda R, Costil R, Feringa BL. Chemically Driven Rotatory Molecular Machines. Angew Chem Int Ed Engl 2022; 61:e202206631. [PMID: 35852813 PMCID: PMC9826306 DOI: 10.1002/anie.202206631] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Indexed: 01/11/2023]
Abstract
Molecular machines are at the frontier of biology and chemistry. The ability to control molecular motion and emulating the movement of biological systems are major steps towards the development of responsive and adaptive materials. Amazing progress has been seen for the design of molecular machines including light-induced unidirectional rotation of overcrowded alkenes. However, the feasibility of inducing unidirectional rotation about a single bond as a result of chemical conversion has been a challenging task. In this Review, an overview of approaches towards the design, synthesis, and dynamic properties of different classes of atropisomers which can undergo controlled switching or rotation under the influence of a chemical stimulus is presented. They are categorized as molecular switches, rotors, motors, and autonomous motors according to their type of response. Furthermore, we provide a future perspective and challenges focusing on building sophisticated molecular machines.
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Affiliation(s)
- Anirban Mondal
- Stratingh Institute for Chemistry University of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Ryojun Toyoda
- Stratingh Institute for Chemistry University of GroningenNijenborgh 49747 AGGroningenThe Netherlands
- Department of ChemistryGraduate School of ScienceTohoku University6-3 Aramaki-Aza-AobaAobaku, Sendai980-8578Japan
| | - Romain Costil
- Stratingh Institute for Chemistry University of GroningenNijenborgh 49747 AGGroningenThe Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry University of GroningenNijenborgh 49747 AGGroningenThe Netherlands
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8
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Borsley S, Leigh DA, Roberts BMW, Vitorica-Yrezabal IJ. Tuning the Force, Speed, and Efficiency of an Autonomous Chemically Fueled Information Ratchet. J Am Chem Soc 2022; 144:17241-17248. [PMID: 36074864 PMCID: PMC9501901 DOI: 10.1021/jacs.2c07633] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Autonomous chemically fueled molecular machines that
function through
information ratchet mechanisms underpin the nonequilibrium processes
that sustain life. These biomolecular motors have evolved to be well-suited
to the tasks they perform. Synthetic systems that function through
similar mechanisms have recently been developed, and their minimalist
structures enable the influence of structural changes on machine performance
to be assessed. Here, we probe the effect of changes in the fuel and
barrier-forming species on the nonequilibrium operation of a carbodiimide-fueled
rotaxane-based information ratchet. We examine the machine’s
ability to catalyze the fuel-to-waste reaction and harness energy
from it to drive directional displacement of the macrocycle. These
characteristics are intrinsically linked to the speed, force, power,
and efficiency of the ratchet output. We find that, just as for biomolecular
motors and macroscopic machinery, optimization of one feature (such
as speed) can compromise other features (such as the force that can
be generated by the ratchet). Balancing speed, power, efficiency,
and directionality will likely prove important when developing artificial
molecular motors for particular applications.
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Affiliation(s)
- Stefan Borsley
- 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.,School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Benjamin M W Roberts
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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9
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Mo K, Zhang Y, Dong Z, Yang Y, Ma X, Feringa BL, Zhao D. Intrinsically unidirectional chemically fuelled rotary molecular motors. Nature 2022; 609:293-298. [PMID: 35793710 DOI: 10.1038/s41586-022-05033-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/28/2022] [Indexed: 12/24/2022]
Abstract
Biological systems mainly utilize chemical energy to fuel autonomous molecular motors, enabling the system to be driven out of equilibrium1. Taking inspiration from rotary motors such as the bacterial flagellar motor2 and adenosine triphosphate synthase3, and building on the success of light-powered unidirectional rotary molecular motors4-6, scientists have pursued the design of synthetic molecular motors solely driven by chemical energy7-13. However, designing artificial rotary molecular motors operating autonomously using a chemical fuel and simultaneously featuring the intrinsic structural design elements to allow full 360° unidirectional rotary motion like adenosine triphosphate synthase remains challenging. Here we show that a homochiral biaryl Motor-3, with three distinct stereochemical elements, is a rotary motor that undergoes repetitive and unidirectional 360° rotation of the two aryl groups around a single-bond axle driven by a chemical fuel. It undergoes sequential ester cyclization, helix inversion and ring opening, and up to 99% unidirectionality is realized over the autonomous rotary cycle. The molecular rotary motor can be operated in two modes: synchronized motion with pulses of a chemical fuel and acid-base oscillations; and autonomous motion in the presence of a chemical fuel under slightly basic aqueous conditions. This rotary motor design with intrinsic control over the direction of rotation, simple chemical fuelling for autonomous motion and near-perfect unidirectionality illustrates the potential for future generations of multicomponent machines to perform mechanical functions.
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Affiliation(s)
- Ke Mo
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Yu Zhang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Zheng Dong
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Yuhang Yang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Xiaoqiang Ma
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Groningen, The Netherlands. .,SCNU-UG International Joint Laboratory of Molecular Science and Displays, National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, China.
| | - Depeng Zhao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China.
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10
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Inami H, Inagaki Y, Setaka W. Design of rotational potential in a phenyltriptycene molecular rotor by exploiting CH/π-interaction between tripticil hydrogen and phenyl. Org Biomol Chem 2022; 20:7092-7098. [PMID: 36039900 DOI: 10.1039/d2ob01179d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemistry of artificial molecular rotors has recently attracted considerable attention in the field of molecular machines. Phenyltriptycene could be used as a stepwise molecular rotor because it is composed of a phenyl rotor and a triptycene stator, in which the rotational potential can be designed by introducing substituents. In this study, a novel design of the relative energies among three rotamers of a substituted phenyltriptycene by exploiting the CH/π-interaction between a peri-hydrogen and phenyl was investigated. First, the structures of two different phenyltriptycenes were compared to confirm CH/π-interactions. Second, the effects of the substituents of 1,4,5-trichloro-3',5'-dimethoxyphenyltriptycene on the relative energies were investigated by structural analysis, temperature-dependent nuclear magnetic resonance studies, and density functional theory calculations. The obtained results should facilitate the design of novel molecular switches and/or molecular rotors.
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Affiliation(s)
- Hazuki Inami
- Division of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
| | - Yusuke Inagaki
- Division of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
| | - Wataru Setaka
- Division of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan.
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11
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Ma J, Zhao D, Jiang C, Lan Z, Li F. Effect of Temperature on Photoisomerization Dynamics of a Newly Designed Two-Stroke Light-Driven Molecular Rotary Motor. Int J Mol Sci 2022; 23:ijms23179694. [PMID: 36077091 PMCID: PMC9456002 DOI: 10.3390/ijms23179694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/20/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
The working mechanism of conventional light-driven molecular rotary motors, especially Feringa-type motors, contains two photoisomerization steps and two thermal helix inversion steps. Due to the existence of a thermal helix inversion step, both the ability to work at lower temperatures and the rotation speed are limited. In this work, a two-stroke light-driven molecular rotary motor, 2-(1,5-dimethyl-4,5-dihydrocyclopenta[b]pyrrol-6(1H)-ylidene)-1,2-dihydro-3H-pyrrol-3-one (DDPY), is proposed, which is capable of performing unidirectional and repetitive rotation by only two photoisomerization (EP→ZP and ZP→EP) steps. With trajectory surface-hopping simulation at the semi-empirical OM2/MRCI level, the EP→ZP and ZP→EP nonadiabatic dynamics of DDPY were systematically studied at different temperatures. Both EP→ZP and ZP→EP photoisomerizations are on an ultrafast timescale (ca. 200–300 fs). The decay mode of EP→ZP photoisomerization is approximately bi-exponential, while that of ZP→EP photoisomerization is found to be periodic. For EP and ZP isomers of DDPY, after the S0→S1 excitation, the dynamical processes of nonadiabatic decay are both followed by twisting about the central C=C double bond and the pyramidalization of the C atom at the stator-axle linkage. The effect of temperature on the nonadiabatic dynamics of EP→ZP and ZP→EP photoisomerizations of DDPY has been systematically investigated. The average lifetimes of the S1 excited state and quantum yields for both EP→ZP and ZP→EP photoisomerization are almost temperature-independent, while the corresponding unidirectionality of rotation is significantly increased (e.g., 74% for EP→ZP and 72% for ZP→EP at 300 K vs 100% for EP→ZP and 94% for ZP→EP at 50 K) with lowering the temperature.
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Affiliation(s)
- Jianzheng Ma
- Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Di Zhao
- Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Chenwei Jiang
- Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
- Correspondence: (C.J.); (Z.L.)
| | - Zhenggang Lan
- Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, SCNU Environmental Research Institute, School of Environment, South China Normal University, Guangzhou 510006, China
- Correspondence: (C.J.); (Z.L.)
| | - Fuli Li
- Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
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12
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Mondal A, Toyoda R, Costil R, Feringa BL. Chemically Driven Rotatory Molecular Machines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anirban Mondal
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Ryojun Toyoda
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chmistry NETHERLANDS
| | - Romain Costil
- University of Groningen: Rijksuniversiteit Groningen Stratingh Institute for Chemistry NETHERLANDS
| | - Ben L Feringa
- University of Groningen Stratingh Institute for Chemistry, Faculty of Science and Engineering Nijenborgh 4 9747 AG Groningen NETHERLANDS
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13
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Albaugh A, Gingrich TR. Simulating a chemically fueled molecular motor with nonequilibrium molecular dynamics. Nat Commun 2022; 13:2204. [PMID: 35459863 PMCID: PMC9033874 DOI: 10.1038/s41467-022-29393-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 02/23/2022] [Indexed: 01/26/2023] Open
Abstract
Most computer simulations of molecular dynamics take place under equilibrium conditions-in a closed, isolated system, or perhaps one held at constant temperature or pressure. Sometimes, extra tensions, shears, or temperature gradients are introduced to those simulations to probe one type of nonequilibrium response to external forces. Catalysts and molecular motors, however, function based on the nonequilibrium dynamics induced by a chemical reaction's thermodynamic driving force. In this scenario, simulations require chemostats capable of preserving the chemical concentrations of the nonequilibrium steady state. We develop such a dynamic scheme and use it to observe cycles of a particle-based classical model of a catenane-like molecular motor. Molecular motors are frequently modeled with detailed-balance-breaking Markov models, and we explicitly construct such a picture by coarse graining the microscopic dynamics of our simulations in order to extract rates. This work identifies inter-particle interactions that tune those rates to create a functional motor, thereby yielding a computational playground to investigate the interplay between directional bias, current generation, and coupling strength in molecular information ratchets.
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Affiliation(s)
- Alex Albaugh
- grid.16753.360000 0001 2299 3507Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 USA
| | - Todd R. Gingrich
- grid.16753.360000 0001 2299 3507Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 USA
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14
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Borsley S, Kreidt E, Leigh DA, Roberts BMW. Autonomous fuelled directional rotation about a covalent single bond. Nature 2022; 604:80-85. [PMID: 35388198 DOI: 10.1038/s41586-022-04450-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/20/2022] [Indexed: 11/09/2022]
Abstract
Biology operates through autonomous chemically fuelled molecular machinery1, including rotary motors such as adenosine triphosphate synthase2 and the bacterial flagellar motor3. Chemists have long sought to create analogous molecular structures with chemically powered, directionally rotating, components4-17. However, synthetic motor molecules capable of autonomous 360° directional rotation about a single bond have proved elusive, with previous designs lacking either autonomous fuelling7,10,12 or directionality6. Here we show that 1-phenylpyrrole 2,2'-dicarboxylic acid18,19 (1a) is a catalysis-driven20,21 motor that can continuously transduce energy from a chemical fuel9,20-27 to induce repetitive 360° directional rotation of the two aromatic rings around the covalent N-C bond that connects them. On treatment of 1a with a carbodiimide21,25-27, intramolecular anhydride formation between the rings and the anhydride's hydrolysis both occur incessantly. Both reactions are kinetically gated28-30 causing directional bias. Accordingly, catalysis of carbodiimide hydration by the motor molecule continuously drives net directional rotation around the N-C bond. The directionality is determined by the handedness of both an additive that accelerates anhydride hydrolysis and that of the fuel, and is easily reversed additive31. More than 97% of fuel molecules are consumed through the chemical engine cycle24 with a directional bias of up to 71:29 with a chirality-matched fuel and additive. In other words, the motor makes a 'mistake' in direction every three to four turns. The 26-atom motor molecule's simplicity augurs well for its structural optimization and the development of derivatives that can be interfaced with other components for the performance of work and tasks32-36.
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Affiliation(s)
- Stefan Borsley
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Elisabeth Kreidt
- Department of Chemistry, University of Manchester, Manchester, UK
| | - David A Leigh
- Department of Chemistry, University of Manchester, Manchester, UK. .,School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.
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15
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Design and Nonadiabatic Photoisomerization Dynamics Study of a Three-Stroke Light-Driven Molecular Rotary Motor. Int J Mol Sci 2022; 23:ijms23073908. [PMID: 35409268 PMCID: PMC8999534 DOI: 10.3390/ijms23073908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 01/01/2023] Open
Abstract
Working cycle of conventional light-driven molecular rotary motors (LDMRMs), especially Feringa-type motors, usually have four steps, two photoisomerization steps, and two thermal helix inversion (THI) steps. THI steps hinder the ability of the motor to operate at lower temperatures and limit the rotation speed of LDMRMs. A three-stroke LDMRM, 2-(2,7-dimethyl-2,3-dihydro-1H-inden-1-ylidene)-1,2-dihydro-3H-pyrrol-3-one (DDIY), is proposed, which is capable of completing an unidirectional rotation by two photoisomerization steps and one thermal helix inversion step at room temperature. On the basis of trajectory surface-hopping simulation at the semi-empirical OM2/MRCI level, the EP→ZP and ZP→EM nonadiabatic photoisomerization dynamics of DDIY were systematically analyzed. Quantum yields of EP→ZP and ZP→EM photoisomerization of DDIY are ca. 34% and 18%, respectively. Both EP→ZP and ZP→EM photoisomerization processes occur on an ultrafast time scale (ca. 100-300 fs). This three-stroke LDMRM may stimulate further research for the development of new families of more efficient LDMRMs.
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16
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Iwata T, Kawano R, Fukami T, Shindo M. Retro‐Friedel‐Crafts‐Type Acidic Ring‐Opening of Triptycenes: A New Synthetic Approach to Acenes. Chemistry 2022; 28:e202104160. [DOI: 10.1002/chem.202104160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Takayuki Iwata
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasuga-koen Kasuga 816-8580 Japan
| | - Ryusei Kawano
- Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasuga-koen Kasuga 816-8580 Japan
| | - Takuto Fukami
- Interdisciplinary Graduate School of Engineering Sciences Kyushu University 6-1 Kasuga-koen Kasuga 816-8580 Japan
| | - Mitsuru Shindo
- Institute for Materials Chemistry and Engineering Kyushu University 6-1 Kasuga-koen Kasuga 816-8580 Japan
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17
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Spiro-fused bicyclo[3,2,2] octatriene-cored triptycene: synthesis, molecular packing, and functional aggregates. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1102-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Wang H, Guan Q, Wang X. Theoretical study on pentiptycene molecular brake: photoinduced isomerization and photoinduced electron transfer. J Mol Model 2021; 27:289. [PMID: 34536143 DOI: 10.1007/s00894-021-04900-3] [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: 05/07/2021] [Accepted: 09/01/2021] [Indexed: 11/26/2022]
Abstract
The isomerization of the double bond plays an important role in the braking and de-braking of the light-controlled molecular brake. Therefore, the pentiptycene-type (Pp-type) light-controlled molecular brake system ((E)- and (Z)-4'-pentiptycyl vinyl-[1,1'-biphenyl]-4-carbonitrile) containing the C = C double bond was theoretically studied. Combining the 6-31G(d) basis set, the ωB97XD functional with dispersion correction was applied to implement the (E)-configuration and (Z)-configuration initial optimization. Next, using the 6-311G(d,p) basis set, the relaxed potential energy surface scans of the rotation angle were operated, and then the optimization calculations of the transition states at the extremum high points. Analyzing the stagnation points and the rotational transition states on the potential energy profiles, the rotation mechanism and basic energy parameters of the molecular brake were obtained. Then, the DFT computations at ground states and the TD-DFT computations of vertical excitation energy were put into practice at the accuracy of the def-TZVP basis set for the two configurations, and using the natural transition orbital (NTO) analyses combining the excitation energies and absorption spectra, the electronic transition characteristics and electron transfer properties of light-controlled molecular brake were studied. Afterwards, in order to investigate the photoinduced isomerization reaction, the C = C double bond was scanned on the relaxed potential energy surface, and the intermediates of the isomerization reaction were searched and analyzed; thus, the braking mechanism of the light-controlled molecular brake was proposed.
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Affiliation(s)
- Hailong Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan, 411105, People's Republic of China
| | - Qiuping Guan
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan, 411105, People's Republic of China
| | - Xueye Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, Hunan, 411105, People's Republic of China.
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19
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20
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Komiya N, Ikeshita M, Tosaki K, Sato A, Itami N, Naota T. Catalytic Enantioselective Rotation of Watermill‐Shaped Dinuclear Pd Complexes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100140] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Naruyoshi Komiya
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
- Chemistry Laboratory The Jikei University School of Medicine Kokuryo, Chofu, Tokyo 182-8570 Japan
| | - Masahiro Ikeshita
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
| | - Koichi Tosaki
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
| | - Atsushi Sato
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
| | - Nao Itami
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science Osaka University Machikaneyama, Toyonaka, Osaka 560-8531 Japan
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21
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Wang H, Guan Q, Wang X. Theoretical research of covalent and controllable molecular brake based on 9-triptycene. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02762-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Borsley S, Leigh DA, Roberts BMW. A Doubly Kinetically-Gated Information Ratchet Autonomously Driven by Carbodiimide Hydration. J Am Chem Soc 2021; 143:4414-4420. [DOI: 10.1021/jacs.1c01172] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- 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
| | - Benjamin M. W. Roberts
- Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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23
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Affiliation(s)
- Takayuki Iwata
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Mitsuru Shindo
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
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24
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Genaev AM, Salnikov GE, Koltunov KY. Unusual temperature-sensitive protonation behaviour of 4-(dimethylamino)pyridine. Org Biomol Chem 2021; 19:866-872. [DOI: 10.1039/d0ob01893g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An unusually strong impact of temperature on the protonation degree of DMAP in strong acid solutions has been found.
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Affiliation(s)
| | | | - Konstantin Yu. Koltunov
- Boreskov Institute of Catalysis
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk 630090
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25
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Liu Y, Xu Q, Sun J, Wang L, He D, Wang M, Yang C. Insights for vibronic effects on spectral shapes of electronic circular dichroism and circularly polarized luminescence of aza[7]helicene. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118475. [PMID: 32470807 DOI: 10.1016/j.saa.2020.118475] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/09/2020] [Accepted: 05/10/2020] [Indexed: 06/11/2023]
Abstract
We present a systematic study of vibrationally resolved absorption (ABS), electronic circular dichroism (ECD), emission (EMI), and circularly polarized luminescence (CPL) of aza[7]helicene. Because of the rare experience of theoretical CPL calculation, a variety of harmonic models have been employed to compute the vibronic structures. To fully understand the vibronic effects on the spectral shapes, Franck-Condon (FC) and Herzberg-Teller (HT) contributions, Duschinsky mixings and temperature effect have all been taken into consideration. The performance of different alternative approximate methods has been carefully compared and discussed in detail. The results show that Vertical Hessian (VH) model has a slight better performance on the spectral shapes than Adiabatic Hessian (AH), especially for CPL spectrum. The thermal excitation effect has led to a reduced resolution and a broader spectral width. The moderate HT effects on the different spectral shapes have been addressed. The dissymmetry factors have been correctly reproduced and the main vibronic features of the four different spectral shapes have been successfully captured. A good estimation of the overall spectral width, relative position and relative height of different spectral bands has been presented. The nice agreement with the experiment allows us to present a detailed interpretation of the spectral shapes.
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Affiliation(s)
- Yanli Liu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Qiushuang Xu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China; School of Physics Engineering, Qufu Normal University, 2673100 Qufu, Shandong, PR China
| | - Jie Sun
- School of Electronic and Information Engineering (Department of Physics), Qilu University of Technology (Shandong Academy of Sciences), 250353 Jinan, Shandong, PR China
| | - Li Wang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China.
| | - Di He
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China.
| | - Chuanlu Yang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
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26
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Liu P, Bao X, Naubron JV, Chentouf S, Humbel S, Vanthuyne N, Jean M, Giordano L, Rodriguez J, Bonne D. Simultaneous Control of Central and Helical Chiralities: Expedient Helicoselective Synthesis of Dioxa[6]helicenes. J Am Chem Soc 2020; 142:16199-16204. [PMID: 32897709 DOI: 10.1021/jacs.0c07995] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An expedient synthesis of a new family of configurationally stable dioxa[6]helicenes was established using a sequential helicoselective organocatalyzed heteroannulation/eliminative aromatization via enantioenriched fused 2-nitro dihydrofurans featuring both central and helical chiralities. Starting from simple achiral precursors, a broad range of these previously unknown chiral heterocyclic scaffolds were obtained with good efficiency, and their aromatization proceeded with very high enantiopurity retention in most cases.
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Affiliation(s)
- Peng Liu
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Xiaoze Bao
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jean-Valère Naubron
- Aix Marseille Université, CNRS, Centrale Marseille, FSCM, Spectropole, Marseille, France
| | - Sara Chentouf
- Aix Marseille Université, CNRS, Centrale Marseille, FSCM, Spectropole, Marseille, France
| | - Stéphane Humbel
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Nicolas Vanthuyne
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Marion Jean
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Laurent Giordano
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Jean Rodriguez
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Damien Bonne
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
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27
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Gauthier ES, Rodríguez R, Crassous J. Metal‐Based Multihelicenic Architectures. Angew Chem Int Ed Engl 2020; 59:22840-22856. [DOI: 10.1002/anie.202004361] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 11/10/2022]
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28
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Gauthier ES, Rodríguez R, Crassous J. Metal‐Based Multihelicenic Architectures. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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29
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Iwata T, Hyodo M, Fukami T, Shiota Y, Yoshizawa K, Shindo M. Anthranoxides as Highly Reactive Arynophiles for the Synthesis of Triptycenes. Chemistry 2020; 26:8506-8510. [PMID: 32432370 DOI: 10.1002/chem.202002065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/19/2020] [Indexed: 12/14/2022]
Abstract
We report herein an efficient method to synthesize triptycenes by the reaction of benzynes and anthranoxides, which are electron-rich and readily prepared from the corresponding anthrones. Using this method, 1,9-syn-substituted triptycenes were regioselectively obtained employing 3-methoxybenzynes. This method was also applied to synthesize pentiptycenes. A DFT study revealed that the cycloaddition of lithium anthranoxide and benzyne proceeds stepwise.
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Affiliation(s)
- Takayuki Iwata
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
| | - Mizuki Hyodo
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
| | - Takuto Fukami
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
| | - Mitsuru Shindo
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, 816-8580, Japan
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30
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Xu Q, Liu Y, Zhao X, Chen S, Li Q, Wang M, Yang C. Vibrationally resolved electronic circular dichroism and circularly polarized luminescence spectra of a boron-fused double helicene: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 231:118132. [PMID: 32058915 DOI: 10.1016/j.saa.2020.118132] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 06/10/2023]
Abstract
In this work, we present the theoretical study of the vibrationally resolved absorption (ABS), electronic circular dichroism (ECD), emission (EMI), and circularly polarized luminescence (CPL) spectra of a boron-fused double helicene, with a detailed and complete discussion of the alternative possible approximate methods. Given the fact that few examples of CPL calculations exist, the potential energy surfaces (PESs) have been constructed and compared with Adiabatic (AH) and Vertical Hessian (VH) models. All the vibronic calculations have accounted for Duschinsky mixings, Franck-Condon (FC) effect and Herzberg-Teller (HT) contribution. Moreover, different HT expansions have been checked and compared, by computing the derivatives of the electric and magnetic dipole transition moments around the equilibrium geometries of the initial and final states. Our results show that both AH and VH models have well reproduced the experimental vibronic structures and VH model shows a better performance in the simulation of spectral lineshapes. They also show that HT effects dominate the shapes of EMI and CPL, tuning the relative heights of the different vibronic peaks, improving the agreement with the experiment for EMI. Moreover, HT effects are the main reason for the mirror-symmetry breaking between ECD and CPL spectra. Furthermore, interesting interference effects between FC and HT contributions have also been addressed.
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Affiliation(s)
- Qiushuang Xu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China; School of Physics Engineering, Qufu Normal University, 2673100 Qufu, Shandong, PR China
| | - Yanli Liu
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China.
| | - Xian Zhao
- State Key Laboratory of Crystal Materials, Shandong University, 250100 Jinan, Shandong, PR China
| | - Shenghui Chen
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Quanjing Li
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
| | - Meishan Wang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China.
| | - Chuanlu Yang
- School of Physics and Optoelectronics Engineering, Ludong University, 264025 Yantai, Shandong, PR China
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31
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Chiu C, Yang J. Photoluminescent and Photoresponsive Iptycene‐Incorporated π‐Conjugated Systems: Fundamentals and Applications. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.201900300] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Chun‐Wei Chiu
- Department of ChemistryNational Taiwan University No 1, Sec 4, Roosevelt Rd Taipei 10617 Taiwan
| | - Jye‐Shane Yang
- Department of ChemistryNational Taiwan University No 1, Sec 4, Roosevelt Rd Taipei 10617 Taiwan
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32
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Hartung T, Machleid R, Simon M, Golz C, Alcarazo M. Enantioselective Synthesis of 1,12‐Disubstituted [4]Helicenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915870] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thierry Hartung
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Rafael Machleid
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
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33
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Hartung T, Machleid R, Simon M, Golz C, Alcarazo M. Enantioselective Synthesis of 1,12-Disubstituted [4]Helicenes. Angew Chem Int Ed Engl 2020; 59:5660-5664. [PMID: 31961992 PMCID: PMC7154633 DOI: 10.1002/anie.201915870] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Indexed: 12/16/2022]
Abstract
A highly enantioselective synthesis of 1,12-disubstituted [4]carbohelicenes is reported. The key step for the developed synthetic route is a Au-catalyzed intramolecular alkyne hydroarylation, which is achieved with good to excellent regio- and enantioselectivity by employing TADDOL-derived (TADDOL=α,α,α,α-tetraaryl-1,3-dioxolane-4,5-dimethanol) α-cationic phosphonites as ancillary ligands. Moreover, an appropriate design of the substrate makes the assembly of [4]helicenes of different substitution patterns possible, thus demonstrating the synthetic utility of the method. The absolute stereochemistry of the newly prepared structures was determined by X-ray crystallography and characterization of their photophysical properties is also reported.
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Affiliation(s)
- Thierry Hartung
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Rafael Machleid
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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34
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Jia X, Nitsch J, Ji L, Wu Z, Friedrich A, Kerner F, Moos M, Lambert C, Marder TB. Triarylborane-Based Helical Donor-Acceptor Compounds: Synthesis, Photophysical, and Electronic Properties. Chemistry 2019; 25:10845-10857. [PMID: 31210396 DOI: 10.1002/chem.201902258] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Indexed: 01/12/2023]
Abstract
The synthesis and characterization of 10-(dimesitylboryl)-N,N-di-p-tolylbenzo[c]phenanthren-4-amine (3-B(Mes)2 -[4]helix-9-N(p-Tol)2 1) and 13-(dimesitylboryl)-N,N-di-p-tolyldibenzo[c,g]phenanthren-8-amine (3-B(Mes)2 -[5]helix-12-N(p-Tol)2 2) are reported herein. Their electrochemical and photophysical properties have been studied experimentally and theoretically. The donor and acceptor-substituted helicene derivatives exhibit moderate fluorescence quantum yields in THF (Φf =0.48 and 0.61 for 1 and 2, respectively), which are higher than unsubstituted ones (Φf =0.18 for [4]helicene; Φf <0.05 for [n]helicenes (n≥5)). In the solid state, the Φf values are higher (Φf =1.00 and 0.55 for 1 and 2, respectively) than those in solution, most likely due to the restrictions of molecular motions. The S1 ←S0 transitions of 1 and 2 are predominately HOMO→LUMO transitions. Upon excitation with UV light, the interplanar angle between the two terminal aryl rings of the [5]helix core of 2 decreases (S1 state compared with S0 state), which is similar to placing a spring under an external force.
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Affiliation(s)
- Xiangqing Jia
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jörn Nitsch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Zhu Wu
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Florian Kerner
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Michael Moos
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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35
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Antien K, Pouységu L, Deffieux D, Massip S, Peixoto PA, Quideau S. Synthesis of [7]Helicene Enantiomers and Exploratory Study of Their Conversion into Helically Chiral Iodoarenes and Iodanes. Chemistry 2019; 25:2852-2858. [DOI: 10.1002/chem.201805761] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Kevin Antien
- Univ. Bordeaux, ISM (CNRS-UMR 5255) 351 cours de la Libération 33405 Talence Cedex France
| | - Laurent Pouységu
- Univ. Bordeaux, ISM (CNRS-UMR 5255) 351 cours de la Libération 33405 Talence Cedex France
| | - Denis Deffieux
- Univ. Bordeaux, ISM (CNRS-UMR 5255) 351 cours de la Libération 33405 Talence Cedex France
| | - Stéphane Massip
- Univ. Bordeaux, Institut Européen de Chimie et Biologie (CNRS-UMS 3033) 2 rue Robert Escarpit 33607 Pessac Cedex France
| | - Philippe A. Peixoto
- Univ. Bordeaux, ISM (CNRS-UMR 5255) 351 cours de la Libération 33405 Talence Cedex France
| | - Stéphane Quideau
- Univ. Bordeaux, ISM (CNRS-UMR 5255) 351 cours de la Libération 33405 Talence Cedex France
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36
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Carreras A, Fuligni L, Alemany P, Llunell M, Bofill JM, Quapp W. Conformational analysis of enantiomerization coupled to internal rotation in triptycyl-n-helicenes. Phys Chem Chem Phys 2019; 21:11395-11404. [PMID: 31111125 DOI: 10.1039/c8cp07164k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We present a computational study of a reduced potential energy surface (PES) to describe enantiomerization and internal rotation in three triptycyl-n-helicene molecules, centering the discussion on the issue of a proper reaction coordinate choice. To reflect the full symmetry of both strongly coupled enantiomerization and rotation processes, two non-fixed combinations of dihedral angles must be used, implying serious computational problems that required the development of a complex general algorithm. The characteristic points on each PES are analyzed, the intrinsic reaction coordinates are calculated, and finally they are projected on the reduced PES. Unlike what was previously found for triptycyl-3-helicene, the surfaces for triptycyl-4-helicene and triptycyl-5-helicene contain valley-ridge-inflection (VRI) points. The reaction paths on the reduced surfaces are analyzed to understand the dynamical behaviour of these molecules and to evaluate the possibility of a molecule of this family exhibiting a Brownian ratchet behaviour.
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Affiliation(s)
- Abel Carreras
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal, 4, 20018 Donostia, Euskadi, Spain
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37
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Hafedh N, Aloui F, Raouafi S. Synthesis, enantiomeric resolution and photophysical properties of 7-cyano-14-methoxy-5-thiahexahelicene. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Alameddine B, Baig N, Shetty S, Al-Sagheer F, Al-Mousawi S. Microwave-Assisted [4+2] Diels-Alder Cycloaddition of 1,4-Diethynyl Triptycene with Various Cyclopentadienone Derivatives: Promising Building Blocks for Polymer Networks. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700655] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Bassam Alameddine
- Department of Mathematics and Natural Sciences; Gulf University for Science and Technology; Kuwait
| | - Noorullah Baig
- Department of Mathematics and Natural Sciences; Gulf University for Science and Technology; Kuwait
| | - Suchetha Shetty
- Department of Mathematics and Natural Sciences; Gulf University for Science and Technology; Kuwait
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39
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Shahabuddin M, Miah MJ, Iimura KI, Kimura T, Karikomi M. Synthesis, chiral resolution and optical properties of amphiphilic oxa[9]helicene derivatives. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Zhang GW, Li PF, Wang HX, Han Y, Chen CF. Complexation of Racemic 2,6-Helic[6]arene and Its Hexamethyl-Substituted Derivative with Quaternary Ammonium Salts, N-Heterocyclic Salts, and Tetracyanoquinodimethane. Chemistry 2017; 23:3735-3742. [PMID: 28054424 DOI: 10.1002/chem.201605394] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 12/28/2022]
Abstract
Complexation of racemic 2,6-helic[6]arene 1 and its hexamethyl-substituted derivative 2 with quaternary ammonium salts, N-heterocyclic salts, and tetracyanoquinodimethane have been described in detail. It was found that host 2 could form stable complexes with acetyl choline, thiaacetyl choline, N,N,N-trimethylbenzenammonium salt, pyridinium, and 4,4'-bipyridinium salts in solution and/or in the solid state. The unsubstituted macrocycle 1 showed more significant complexation with the widely tested quaternary ammonium salts and N-heterocyclic salts, and exhibited stronger complexation towards the guests than its derivative 2. Moreover, it was found that macrocycle 1 and its derivative 2 could also complex with neutral electron-deficient tetracyanoquinodimethane (TCNQ), and the association constants were determined to be 2840±94 and 1358±46 m-1 , respectively. These results could make this new macrocycle and its derivatives find wide applications in the design and construction of functional supramolecular assemblies.
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Affiliation(s)
- Geng-Wu Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Peng-Fei Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Han-Xiao Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Ying Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Chuan-Feng Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
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41
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Pang X, Cui X, Hu D, Jiang C, Zhao D, Lan Z, Li F. “Watching” the Dark State in Ultrafast Nonadiabatic Photoisomerization Process of a Light-Driven Molecular Rotary Motor. J Phys Chem A 2017; 121:1240-1249. [DOI: 10.1021/acs.jpca.6b12253] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xiaojuan Pang
- Key
Laboratory for Quantum Information and Quantum Optoelectronic Devices,
Shaanxi, and Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Xueyan Cui
- Key
Laboratory for Quantum Information and Quantum Optoelectronic Devices,
Shaanxi, and Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Deping Hu
- Qingdao Institute
of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 Shandong China
| | - Chenwei Jiang
- Key
Laboratory for Quantum Information and Quantum Optoelectronic Devices,
Shaanxi, and Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Di Zhao
- Key
Laboratory for Quantum Information and Quantum Optoelectronic Devices,
Shaanxi, and Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
| | - Zhenggang Lan
- Qingdao Institute
of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101 Shandong China
| | - Fuli Li
- Key
Laboratory for Quantum Information and Quantum Optoelectronic Devices,
Shaanxi, and Department of Applied Physics, Xi’an Jiaotong University, Xi’an 710049, China
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42
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Al Mousawi A, Dumur F, Garra P, Toufaily J, Hamieh T, Goubard F, Bui TT, Graff B, Gigmes D, Pierre Fouassier J, Lalevée J. Azahelicenes as visible light photoinitiators for cationic and radical polymerization: Preparation of photoluminescent polymers and use in high performance LED projector 3D printing resins. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28476] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Assi Al Mousawi
- Institut de Science des Matériaux de Mulhouse IS2M - UMR CNRS 7361 - UHA, 15, rue Jean Starcky; 68057 Mulhouse Cedex France
- Laboratoire de Matériaux, Catalyse, Environnement et Méthodes analytiques (MCEMA-CHAMSI), EDST, Université Libanaise, Campus Hariri, Hadath; Beyrouth Liban
| | - Frédéric Dumur
- Aix Marseille Univ; CNRS, ICR UMR 7273 Marseille F-13397 France
| | - Patxi Garra
- Institut de Science des Matériaux de Mulhouse IS2M - UMR CNRS 7361 - UHA, 15, rue Jean Starcky; 68057 Mulhouse Cedex France
| | - Joumana Toufaily
- Laboratoire de Matériaux, Catalyse, Environnement et Méthodes analytiques (MCEMA-CHAMSI), EDST, Université Libanaise, Campus Hariri, Hadath; Beyrouth Liban
| | - Tayssir Hamieh
- Laboratoire de Matériaux, Catalyse, Environnement et Méthodes analytiques (MCEMA-CHAMSI), EDST, Université Libanaise, Campus Hariri, Hadath; Beyrouth Liban
| | - Fabrice Goubard
- Laboratoire de Physicochimie des Polymères et des Interfaces (LPPI), Université de Cergy-Pontoise; 5 mail Gay Lussac, Neuville-sur-Oise, 95031 Cergy-Pontoise Cedex France
| | - Thanh-Tuân Bui
- Laboratoire de Physicochimie des Polymères et des Interfaces (LPPI), Université de Cergy-Pontoise; 5 mail Gay Lussac, Neuville-sur-Oise, 95031 Cergy-Pontoise Cedex France
| | - Bernadette Graff
- Institut de Science des Matériaux de Mulhouse IS2M - UMR CNRS 7361 - UHA, 15, rue Jean Starcky; 68057 Mulhouse Cedex France
| | - Didier Gigmes
- Aix Marseille Univ; CNRS, ICR UMR 7273 Marseille F-13397 France
| | - Jean Pierre Fouassier
- Institut de Science des Matériaux de Mulhouse IS2M - UMR CNRS 7361 - UHA, 15, rue Jean Starcky; 68057 Mulhouse Cedex France
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M - UMR CNRS 7361 - UHA, 15, rue Jean Starcky; 68057 Mulhouse Cedex France
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43
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Jhulki S, Mishra AK, Chow TJ, Moorthy JN. Carbo[5]helicene versus planar phenanthrene as a scaffold for organic materials in OLEDs: the electroluminescence of anthracene-functionalized emissive materials. NEW J CHEM 2017. [DOI: 10.1039/c7nj02233f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Rigid and twisted carbo[5]helicene imparts better physical and electroluminescence properties than planar phenantherene for phenylanthracene-functionalized emissive materials.
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Affiliation(s)
- Samik Jhulki
- Department of Chemistry
- Indian Institute of Technology
- Kanpur 208016
- India
| | | | - Tahsin J. Chow
- Institute of Chemistry
- Academia Sinica
- Taipei
- Republic of China
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44
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Kassem S, van Leeuwen T, Lubbe AS, Wilson MR, Feringa BL, Leigh DA. Artificial molecular motors. Chem Soc Rev 2017; 46:2592-2621. [DOI: 10.1039/c7cs00245a] [Citation(s) in RCA: 539] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Artificial molecular motors take inspiration from motor proteins, nature's solution for achieving directional molecular level motion. An overview is given of the principal designs of artificial molecular motors and their modes of operation. We identify some key challenges remaining in the field.
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Affiliation(s)
- Salma Kassem
- School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Thomas van Leeuwen
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Anouk S. Lubbe
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | | | - Ben L. Feringa
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
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45
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Lin W, Hu X, Song S, Cai Q, Wang Y, Shi D. Microwave-assisted synthesis of novel hetero[5]helicene-like molecules and coumarin derivatives. Org Biomol Chem 2017; 15:7909-7916. [PMID: 28895604 DOI: 10.1039/c7ob01742a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A concise and efficient approach to design and synthesize hetero[5]helicene-like molecules and coumarin derivatives is reported.
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Affiliation(s)
- Wei Lin
- School of Chemistry and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Xiuxiu Hu
- School of Chemistry and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Shuai Song
- School of Chemistry and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Qi Cai
- School of Chemistry and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Yun Wang
- School of Chemistry and Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Daqing Shi
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- P. R. China
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46
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Raju S, Annamalai P, Chen PL, Liu YH, Chuang SC. Iptycenes with an acridinone motif developed through [4+2] cycloaddition of tethered naphthalene and iminoquinone via a radical reaction. Chem Commun (Camb) 2017; 53:6247-6250. [DOI: 10.1039/c7cc03030d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A new class of iptycenes was developed by combining 2-(naphthalen-1-yl)anilines and p-benzoquinones through copper(ii)-mediated radical cyclisation.
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Affiliation(s)
- Selvam Raju
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
| | | | - Pei-Ling Chen
- Department of Chemistry
- National Tsing Hua University
- Hsinchu
- Taiwan 30013
| | - Yi-Hung Liu
- Instrumentation Center
- National Taiwan University
- Taipei
- Taiwan 30010
| | - Shih-Ching Chuang
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu
- Taiwan 30010
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47
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48
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Wilson MR, Solà J, Carlone A, Goldup SM, Lebrasseur N, Leigh DA. An autonomous chemically fuelled small-molecule motor. Nature 2016; 534:235-40. [PMID: 27279219 DOI: 10.1038/nature18013] [Citation(s) in RCA: 305] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 04/12/2016] [Indexed: 12/24/2022]
Abstract
Molecular machines are among the most complex of all functional molecules and lie at the heart of nearly every biological process. A number of synthetic small-molecule machines have been developed, including molecular muscles, synthesizers, pumps, walkers, transporters and light-driven and electrically driven rotary motors. However, although biological molecular motors are powered by chemical gradients or the hydrolysis of adenosine triphosphate (ATP), so far there are no synthetic small-molecule motors that can operate autonomously using chemical energy (that is, the components move with net directionality as long as a chemical fuel is present). Here we describe a system in which a small molecular ring (macrocycle) is continuously transported directionally around a cyclic molecular track when powered by irreversible reactions of a chemical fuel, 9-fluorenylmethoxycarbonyl chloride. Key to the design is that the rate of reaction of this fuel with reactive sites on the cyclic track is faster when the macrocycle is far from the reactive site than when it is near to it. We find that a bulky pyridine-based catalyst promotes carbonate-forming reactions that ratchet the displacement of the macrocycle away from the reactive sites on the track. Under reaction conditions where both attachment and cleavage of the 9-fluorenylmethoxycarbonyl groups occur through different processes, and the cleavage reaction occurs at a rate independent of macrocycle location, net directional rotation of the molecular motor continues for as long as unreacted fuel remains. We anticipate that autonomous chemically fuelled molecular motors will find application as engines in molecular nanotechnology.
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Affiliation(s)
- Miriam R Wilson
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Jordi Solà
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Armando Carlone
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Stephen M Goldup
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Nathalie Lebrasseur
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - David A Leigh
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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49
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Everhart SC, Jayasundara UK, Kim H, Procúpez-Schtirbu R, Stanbery WA, Mishler CH, Frost BJ, Cline JI, Bell TW. Synthesis and Photoisomerization of Substituted Dibenzofulvene Molecular Rotors. Chemistry 2016; 22:11291-302. [PMID: 27363530 DOI: 10.1002/chem.201600854] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Indexed: 12/18/2022]
Abstract
The synthesis, spectral and structural characterization, and photoisomerization of a family of 2-substituted dibenzofulvene molecular actuators based on (2,2,2-triphenylethylidene)fluorene (TEF) are reported. The 2-substituted species investigated are nitro (NTEF), cyano (CTEF), and iodo (ITEF). X-ray structures of these three compounds and three intermediates were determined to assign alkene configuration and investigate the effects of the 2-substituents on steric gearing. The addition-elimination reaction of Z-9 with trityl anion to form Z-10 proceeded with complete retention of configuration. Rates of photoisomerization were measured at irradiation wavelengths between 266-355 nm in acetonitrile/dioxane solutions at room temperature. Photoisomerization quantum yields (φ) were calculated by means of a mathematical model that accounts for a certain degree of photodecomposition in the cases of CTEF and ITEF. Quantum yields vary significantly with substituent, having maximum values of φ=0.26 for NTEF, 0.39 for CTEF, and 0.50 for ITEF. NTEF is photochemically robust and has a large quantum yield for photoisomerization in the near-UV, making it a particularly promising drive rotor moiety for light-powered molecular devices.
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Affiliation(s)
- Stephanie C Everhart
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Udaya K Jayasundara
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - HyunJong Kim
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Rolando Procúpez-Schtirbu
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA.,Coordinador Sección Química General, Escuela de Química, Universidad de Costa Rica, P.O. Box 11501-2060, Costa Rica
| | - Wayne A Stanbery
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Clay H Mishler
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Brian J Frost
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Joseph I Cline
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA
| | - Thomas W Bell
- Department of Chemistry and Program in Chemical Physics, University of Nevada, Reno, NV, 89557-0216, USA.
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50
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Muller BM, Litberg TJ, Yocum RA, Pniewski CA, Adler MJ. Extended Aromatic and Heteroaromatic Ring Systems in the Chalcone–Flavanone Molecular Switch Scaffold. J Org Chem 2016; 81:5775-81. [DOI: 10.1021/acs.joc.6b00986] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Brian M. Muller
- Department of Chemistry and
Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy, DeKalb, Illinois 60115, United States
| | - Theodore J. Litberg
- Department of Chemistry and
Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy, DeKalb, Illinois 60115, United States
| | - Reid A. Yocum
- Department of Chemistry and
Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy, DeKalb, Illinois 60115, United States
| | - Chanté A. Pniewski
- Department of Chemistry and
Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy, DeKalb, Illinois 60115, United States
| | - Marc J. Adler
- Department of Chemistry and
Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy, DeKalb, Illinois 60115, United States
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