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Zhao YL, Lin W, Jitapunkul K, Zhao R, Zhang RQ, Van Hove MA. Surface-Mounted Dipolar Molecular Rotors Driven by External Electric Field, As Revealed by Torque Analyses. ACS OMEGA 2022; 7:35159-35169. [PMID: 36211039 PMCID: PMC9535713 DOI: 10.1021/acsomega.2c04128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 07/18/2022] [Indexed: 06/16/2023]
Abstract
Driven by a high-speed rotating electric field (E-field), molecular motors with polar groups may perform a unidirectional, repetitive, and GHz frequency rotation and thus offer potential applications as nanostirrers. To drive the unidirectional rotation of molecular motors, it is crucial to consider factors of internal charge flow, thermal noise, molecular flexibility, and so forth before selecting an appropriate frequency of a rotating E-field. Herein, we studied two surface-mounted dipolar rotors of a "caltrop-like" molecule and a "sandwich" molecule by using quantum-mechanical computations in combination with torque analyses. We find that the rotational trend as indicated by the magnitude and the direction of torque vectors can sensitively change with the lag angle (α) between the dipolar arm and the E-field. The atomic charges timely flow within the molecule as the E-field rotates, so the lag angle α must be kept in particular intervals to maintain the rotor's unidirectional rotation. The thermal effect can substantially slow down the rotation of the dipolar rotor in the E-field. The flexible dipolar arm shows a more rigid geometry in the E-field with higher rotation speed. Our work would be useful for designing E-driven molecular rotors and for guiding their practical applications in future.
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Affiliation(s)
- Yan-Ling Zhao
- Department
of Physics, City University of Hong Kong, Hong Kong SAR 999077, China
- Shenzhen
Research Institute, City University of Hong
Kong, Shenzhen 518057, China
| | - Wanxing Lin
- Department
of Physics, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Kulpavee Jitapunkul
- Department
of Physics, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Rundong Zhao
- School
of Physics, Beihang University, Beijing 100191, China
- Shenzhen
JL Computational Science and Applied Research Institute, Shenzhen 518129, China
| | - Rui-Qin Zhang
- Department
of Physics, City University of Hong Kong, Hong Kong SAR 999077, China
- Shenzhen
JL Computational Science and Applied Research Institute, Shenzhen 518129, China
| | - Michel A. Van Hove
- Institute
of Computational and Theoretical Studies & Department of Physics, Hong Kong Baptist University, Hong Kong SAR 999077, China
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Nikitin K, Ortin Y, McGlinchey MJ. Dynamics of a Molecular Rotor Exhibiting Local Directional Rotational Preference within Each Enantiomer. J Phys Chem A 2021; 125:2061-2068. [PMID: 33666434 PMCID: PMC8154598 DOI: 10.1021/acs.jpca.0c08476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Directional internal rotation in molecular systems, generally controlled by chirality, is known to occur in natural and artificial systems driven by light or fueled chemically, but spontaneous directional molecular rotation is believed to be forbidden. We have designed a molecular rotor, whereby ferrocene and triptycene linked by a methylene bridge provide two rotational degrees of freedom. On the basis of experimental observations, in conjunction with computational data, we show that the two different modes of rotation are strongly coupled and the spatial orientation of the bistable ferrocene moiety controls the barrier to its own rotation about the triptycene axis. It is proposed that the barrier to clockwise 120° rotation across each individual triptycene blade is lower in the M-enantiomer and for counterclockwise 120° rotation, it is lower in its P-counterpart. These findings demonstrate the possibility of locally preferred thermal directional intramolecular rotation for each dynamically interconverting enantiomer.
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Affiliation(s)
- Kirill Nikitin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Yannick Ortin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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3
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Biswas PK, Saha S, Nanaji Y, Rana A, Schmittel M. Influence of Rotator Design on the Speed of Self-Assembled Four-Component Nanorotors: Coordinative Versus Dispersive Interactions. Inorg Chem 2017; 56:6662-6670. [DOI: 10.1021/acs.inorgchem.7b00740] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pronay Kumar Biswas
- Center of Micro- and Nanochemistry and
Engineering, University of Siegen, Adolf−Reichwein−Str.
2, D-57068 Siegen, Germany
| | - Suchismita Saha
- Center of Micro- and Nanochemistry and
Engineering, University of Siegen, Adolf−Reichwein−Str.
2, D-57068 Siegen, Germany
| | - Yerramsetti Nanaji
- Center of Micro- and Nanochemistry and
Engineering, University of Siegen, Adolf−Reichwein−Str.
2, D-57068 Siegen, Germany
| | - Anup Rana
- Center of Micro- and Nanochemistry and
Engineering, University of Siegen, Adolf−Reichwein−Str.
2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center of Micro- and Nanochemistry and
Engineering, University of Siegen, Adolf−Reichwein−Str.
2, D-57068 Siegen, Germany
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Ma W, Xu L, de Moura AF, Wu X, Kuang H, Xu C, Kotov NA. Chiral Inorganic Nanostructures. Chem Rev 2017; 117:8041-8093. [DOI: 10.1021/acs.chemrev.6b00755] [Citation(s) in RCA: 485] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - André F. de Moura
- Department
of Chemistry, Federal University of São Carlos, CP 676, CEP 13.565-905, São Carlos, SP, Brazil
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Abdelmohsen LKEA, Nijemeisland M, Pawar GM, Janssen GJA, Nolte RJM, van Hest JCM, Wilson DA. Dynamic Loading and Unloading of Proteins in Polymeric Stomatocytes: Formation of an Enzyme-Loaded Supramolecular Nanomotor. ACS NANO 2016; 10:2652-60. [PMID: 26811982 DOI: 10.1021/acsnano.5b07689] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Self-powered artificial nanomotors are currently attracting increased interest as mimics of biological motors but also as potential components of nanomachinery, robotics, and sensing devices. We have recently described the controlled shape transformation of polymersomes into bowl-shaped stomatocytes and the assembly of platinum-driven nanomotors. However, the platinum encapsulation inside the structures was low; only 50% of the structures contained the catalyst and required both high fuel concentrations for the propelling of the nanomotors and harsh conditions for the shape transformation. Application of the nanomotors in a biological setting requires the nanomotors to be efficiently propelled by a naturally available energy source and at biological relevant concentrations. Here we report a strategy for enzyme entrapment and nanomotor assembly via controlled and reversible folding of polymersomes into stomatocytes under mild conditions, allowing the encapsulation of the proteins inside the stomach with almost 100% efficiency and retention of activity. The resulting enzyme-driven nanomotors are capable of propelling these structures at low fuel concentrations (hydrogen peroxide or glucose) via a one-enzyme or two-enzyme system. The confinement of the enzymes inside the stomach does not hinder their activity and in fact facilitates the transfer of the substrates, while protecting them from the deactivating influences of the media. This is particularly important for future applications of nanomotors in biological settings especially for systems where fast autonomous movement occurs at physiological concentrations of fuel.
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Affiliation(s)
- Loai K E A Abdelmohsen
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Marlies Nijemeisland
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Gajanan M Pawar
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Geert-Jan A Janssen
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Roeland J M Nolte
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Jan C M van Hest
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Daniela A Wilson
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
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How self-assembly of amphiphilic molecules can generate complexity in the nanoscale. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.058] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Bouju X, Chérioux F, Coget S, Rapenne G, Palmino F. Directional molecular sliding at room temperature on a silicon runway. NANOSCALE 2013; 5:7005-7010. [PMID: 23800961 DOI: 10.1039/c3nr01685d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The design of working nanovehicles is a key challenge for the development of new devices. In this context, 1D controlled sliding of molecules on a silicon-based surface is successfully achieved by using an optimized molecule-substrate pair. Even though the molecule and surface are compatible, the molecule-substrate interaction provides a 1D template effect to guide molecular sliding along a preferential surface orientation. Molecular motion is monitored by STM experiments under ultra-high vacuum at room temperature. Molecule-surface interactions are elucidated by semi-empirical calculations.
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Affiliation(s)
- Xavier Bouju
- CEMES-CNRS, NanoSciences Group, 29 rue Jeanne Marvig, BP 94347, F-31055 Toulouse Cedex 4, France.
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Granados-Chinchilla F, Arias-Andrés M, Rodríguez C. Tetracycline and 4-epitetracycline modified the in vitro catabolic activity and structure of a sediment microbial community from a tropical tilapia farm idiosyncratically. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2013; 48:291-301. [PMID: 23374048 DOI: 10.1080/03601234.2013.743788] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Aquaculture farmers commonly add tetracycline to fish feed or to their ponds to prevent or treat bacterial infections in their crops. To assess the short-term effect of tetracycline (TET) and of one of its reversible epimers, 4-epitetracycline (ETC), on the function and structure of a sediment microbial community from a tropical tilapia farm, we contrasted community-level physiological profiles (CLPP) and phospholipid fatty acid profiles (PLFA) obtained from microcosms exposed for 12 days to 5, 10, 50, or 75 mg kg(-1)of these antibiotics. Notwithstanding that the concentration of the antibiotics during the experiment decreased between 13-100% (TET) or 16-61% (ETC), both compounds provoked opposing metabolic responses that did not revert. TET displayed a tendency to inhibit respiration at concentrations < 50 mg kg(-1), whereas ETC showed the opposite effect. As revealed by the finding of the fatty acids 11:0 iso 3OH, 16:1w6c, and 18:1w6c, the sediment analyzed was predominantly colonized by Gram-negative bacteria. A marked decrease in fatty acid diversity accompanied the aforementioned metabolic responses, with TET concentrations > 50 mg kg(-1)leading to an enrichment of yeast and fungal biomarkers and both antibiotics at concentrations < 10 mg kg(-1)selecting for microorganisms with 11:0 iso 3OH. In agreement with CLPP data, differences between the PLFA profiles of control and treated microcosms were more pronounced for TET than for ETC. We conclude that high, yet field-relevant, concentrations of TET and ETC have the potential to modify the composition, and to a lesser extent, the functioning of a sediment microbial community. This study highlights the importance of considering antibiotic degradation products in ecotoxicological research.
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