1
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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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2
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Das S, Nascimbeni G, de la Morena RO, Ishiwari F, Shoji Y, Fukushima T, Buck M, Zojer E, Zharnikov M. Porous Honeycomb Self-Assembled Monolayers: Tripodal Adsorption and Hidden Chirality of Carboxylate Anchored Triptycenes on Ag. ACS NANO 2021; 15:11168-11179. [PMID: 34125529 PMCID: PMC8320238 DOI: 10.1021/acsnano.1c03626] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/08/2021] [Indexed: 06/12/2023]
Abstract
Molecules with tripodal anchoring to substrates represent a versatile platform for the fabrication of robust self-assembled monolayers (SAMs), complementing the conventional monopodal approach. In this context, we studied the adsorption of 1,8,13-tricarboxytriptycene (Trip-CA) on Ag(111), mimicked by a bilayer of silver atoms underpotentially deposited on Au. While tripodal SAMs frequently suffer from poor structural quality and inhomogeneous bonding configurations, the triptycene scaffold featuring three carboxylic acid anchoring groups yields highly crystalline SAM structures. A pronounced polymorphism is observed, with the formation of distinctly different structures depending on preparation conditions. Besides hexagonal molecular arrangements, the occurrence of a honeycomb structure is particularly intriguing as such an open structure is unusual for SAMs consisting of upright-standing molecules. Advanced spectroscopic tools reveal an equivalent bonding of all carboxylic acid anchoring groups. Notably, density functional theory calculations predict a chiral arrangement of the molecules in the honeycomb network, which, surprisingly, is not apparent in experimental scanning tunneling microscopy (STM) images. This seeming discrepancy between theory and experiment can be resolved by considering the details of the actual electronic structure of the adsorbate layer. The presented results represent an exemplary showcase for the intricacy of interpreting STM images of complex molecular films. They are also further evidence for the potential of triptycenes as basic building blocks for generating well-defined layers with unusual structural motifs.
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Affiliation(s)
- Saunak Das
- Angewandte
Physikalische Chemie, Universität
Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Giulia Nascimbeni
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | | | - Fumitaka Ishiwari
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Yoshiaki Shoji
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Takanori Fukushima
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Manfred Buck
- EaStCHEM
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K.
| | - Egbert Zojer
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Michael Zharnikov
- Angewandte
Physikalische Chemie, Universität
Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
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3
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Ehnbom A, Gladysz JA. Gyroscopes and the Chemical Literature, 2002–2020: Approaches to a Nascent Family of Molecular Devices. Chem Rev 2021; 121:3701-3750. [DOI: 10.1021/acs.chemrev.0c01001] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Andreas Ehnbom
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012, United States
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4
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Lu K, Liang PY, Yan CX, Yang FL, Yang X, Dou W, Yu Q, Yang J, Zhou PP. Chiral phosphoric acid catalyzed atroposelective C–H amination of arenes: mechanisms, origin and influencing factors of enantioselectivity. Org Chem Front 2021. [DOI: 10.1039/d0qo01160f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The amination reaction between azonaphthalene and carbazole catalyzed by chiral phosphoric acid was theoretically investigated, and the mechanism, origin and influencing factors of enantioselectivity were elaborated.
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Affiliation(s)
- Ka Lu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Peng-Yu Liang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Chao-Xian Yan
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Fang-Ling Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Xing Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Wei Dou
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Qinwei Yu
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an
- P. R. China
| | - Jianming Yang
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an
- P. R. China
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
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5
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Mohanta PP, Pati HN, Behera AK. The construction of fluorophoric thiazolo-[2,3- b]quinazolinone derivatives: a multicomponent domino synthetic approach. RSC Adv 2020; 10:15354-15359. [PMID: 35495457 PMCID: PMC9052208 DOI: 10.1039/d0ra01066a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 03/28/2020] [Indexed: 01/19/2023] Open
Abstract
Acid-mediated one-pot domino reactions of substituted 2-amino thiazoles, substituted benzaldehydes and cyclic diketones have been developed for the synthesis of novel and architecturally unique thiazolo[2,3-b]quinazolinone derivatives under microwave irradiation. In this protocol, a series of thiazolo[2,3-b]quinazolinone derivatives have been synthesized and the excellent fluorescence behaviors of some of the molecules have been reported based on the incorporation of different electron-donating and electron-withdrawing substituents on the aryl moieties of the target molecules. A library of unique fluorophoric thiazolo[2,3-b]quinazolinones were synthesized under acid catalyzed one pot microwave irradiation technique.![]()
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Affiliation(s)
| | - Hari Narayan Pati
- School of Chemistry, Sambalpur University Jyoti Vihar Burla-768019 India
| | - Ajaya Kumar Behera
- School of Chemistry, Sambalpur University Jyoti Vihar Burla-768019 India
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6
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Benneckendorf FS, Rohnacher V, Sauter E, Hillebrandt S, Münch M, Wang C, Casalini S, Ihrig K, Beck S, Jänsch D, Freudenberg J, Jaegermann W, Samorì P, Pucci A, Bunz UHF, Zharnikov M, Müllen K. Tetrapodal Diazatriptycene Enforces Orthogonal Orientation in Self-Assembled Monolayers. ACS APPLIED MATERIALS & INTERFACES 2020; 12:6565-6572. [PMID: 31825591 DOI: 10.1021/acsami.9b16062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Conformationally rigid multipodal molecules should control the orientation and packing density of functional head groups upon self-assembly on solid supports. Common tripods frequently fail in this regard because of inhomogeneous bonding configuration and stochastic orientation. These issues are circumvented by a suitable tetrapodal diazatriptycene moiety, bearing four thiol-anchoring groups, as demonstrated in the present study. Such molecules form well-defined self-assembled monolayers (SAMs) on Au(111) substrates, whereby the tetrapodal scaffold enforces a nearly upright orientation of the terminal head group with respect to the substrate, with at least three of the four anchoring groups providing thiolate-like covalent attachment to the surface. Functionalization by condensation chemistry allows a large variety of functional head groups to be introduced to the tetrapod, paving the path toward advanced surface engineering and sensor fabrication.
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Affiliation(s)
- Frank S Benneckendorf
- Organisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 , 69120 Heidelberg , Germany
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
| | - Valentina Rohnacher
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Kirchhoff-Institut für Physik , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany
| | - Eric Sauter
- Angewandte Physikalische Chemie , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Sabina Hillebrandt
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy , University of St Andrews , North Haugh , St Andrews KY16 9SS , United Kingdom
- Kirchhoff-Institut für Physik , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany
| | - Maybritt Münch
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Materials Science Department, Surface Science Division , TU Darmstadt , Otto-Berndt-Straße 3 , 64287 Darmstadt , Germany
| | - Can Wang
- University of Strasbourg , CNRS, ISIS, 8 allée Gaspard Monge , 67000 Strasbourg , France
| | - Stefano Casalini
- University of Strasbourg , CNRS, ISIS, 8 allée Gaspard Monge , 67000 Strasbourg , France
| | - Katharina Ihrig
- Organisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 , 69120 Heidelberg , Germany
| | - Sebastian Beck
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Kirchhoff-Institut für Physik , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany
| | - Daniel Jänsch
- Organisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 , 69120 Heidelberg , Germany
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
| | - Jan Freudenberg
- Organisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 , 69120 Heidelberg , Germany
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
| | - Wolfram Jaegermann
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Materials Science Department, Surface Science Division , TU Darmstadt , Otto-Berndt-Straße 3 , 64287 Darmstadt , Germany
| | - Paolo Samorì
- University of Strasbourg , CNRS, ISIS, 8 allée Gaspard Monge , 67000 Strasbourg , France
| | - Annemarie Pucci
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Kirchhoff-Institut für Physik , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 227 , 69120 Heidelberg , Germany
- Centre for Advanced Materials , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 225 , 69120 Heidelberg , Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270 , 69120 Heidelberg , Germany
- Centre for Advanced Materials , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 225 , 69120 Heidelberg , Germany
| | - Michael Zharnikov
- Angewandte Physikalische Chemie , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Klaus Müllen
- InnovationLab , Speyerer Straße 4 , 69115 Heidelberg , Germany
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
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7
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Ishiwari F, Nascimbeni G, Sauter E, Tago H, Shoji Y, Fujii S, Kiguchi M, Tada T, Zharnikov M, Zojer E, Fukushima T. Triptycene Tripods for the Formation of Highly Uniform and Densely Packed Self-Assembled Monolayers with Controlled Molecular Orientation. J Am Chem Soc 2019; 141:5995-6005. [PMID: 30869881 PMCID: PMC6483319 DOI: 10.1021/jacs.9b00950] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
When
employing self-assembled monolayers (SAMs) for tuning surface
and interface properties, organic molecules that enable strong binding
to the substrate, large-area structural uniformity, precise alignment
of functional groups, and control of their density are highly desirable.
To achieve these goals, tripod systems bearing multiple bonding sites
have been developed as an alternative to conventional monodentate
systems. Bonding of all three sites has, however, hardly been achieved,
with the consequence that structural uniformity and orientational
order in tripodal SAMs are usually quite poor. To overcome that problem,
we designed 1,8,13-trimercaptomethyltriptycene (T1) and
1,8,13-trimercaptotriptycene (T2) as potential tripodal
SAM precursors and investigated their adsorption behavior on Au(111)
combining several advanced experimental techniques and state-of-the-art
theoretical simulations. Both SAMs adopt dense, nested hexagonal structures
but differ in their adsorption configurations and structural uniformity.
While the T2-based SAM exhibits a low degree of order
and noticeable deviation from the desired tripodal anchoring, all
three anchoring groups of T1 are equally bonded to the
surface as thiolates, resulting in an almost upright orientation of
the benzene rings and large-area structural uniformity. These superior
properties are attributed to the effect of conformationally flexible
methylene linkers at the anchoring groups, absent in the case of T2. Both SAMs display interesting electronic properties, and,
bearing in mind that the triptycene framework can be functionalized
by tail groups in various positions and with high degree of alignment,
especially T1 appears as an ideal docking platform for
complex and highly functional molecular films.
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Affiliation(s)
| | - Giulia Nascimbeni
- Institute of Solid State Physics, NAWI Graz , Graz University of Technology , Petersgasse 16 , Graz 8010 , Austria
| | - Eric Sauter
- Applied Physical Chemistry , Heidelberg University , Im Neuenheimer Feld 253 , Heidelberg 69120 , Germany
| | | | | | - Shintaro Fujii
- Department of Chemistry, Graduate School of Science and Engineering , Tokyo Institute of Technology , Meguro , Tokyo 152-8551 , Japan
| | - Manabu Kiguchi
- Department of Chemistry, Graduate School of Science and Engineering , Tokyo Institute of Technology , Meguro , Tokyo 152-8551 , Japan
| | | | - Michael Zharnikov
- Applied Physical Chemistry , Heidelberg University , Im Neuenheimer Feld 253 , Heidelberg 69120 , Germany
| | - Egbert Zojer
- Institute of Solid State Physics, NAWI Graz , Graz University of Technology , Petersgasse 16 , Graz 8010 , Austria
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8
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Jasper-Tönnies T, Poltavsky I, Ulrich S, Moje T, Tkatchenko A, Herges R, Berndt R. Stability of functionalized platform molecules on Au(111). J Chem Phys 2018; 149:244705. [PMID: 30599747 DOI: 10.1063/1.5059344] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Trioxatriangulenium (TOTA) platform molecules were functionalized with methyl, ethyl, ethynyl, propynyl, and hydrogen and sublimated onto Au(111) surfaces. Low-temperature scanning tunneling microscopy data reveal that >99% of ethyl-TOTA and methyl-TOTA remain intact, whereas 60% of H-TOTA and >99% of propynyl-TOTA and ethynyl-TOTA decompose. The observed tendency toward fragmentation on Au(111) is opposite to the sequence of gas-phase stabilities of the molecules. Although Au(111) is the noblest of all metal surfaces, the binding energies of the decomposition products to Au(111) destabilize the functionalized platforms by 2 to 3.9 eV (190-370 kJ/mol) and even render some of them unstable as revealed by density functional theory calculations. Van der Waals forces are important, as they drive the adsorption of the platform molecules.
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Affiliation(s)
- Torben Jasper-Tönnies
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Igor Poltavsky
- Physics and Materials Science Research Unit, University of Luxembourg, Luxembourg City L-1511, Luxembourg
| | - Sandra Ulrich
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Tobias Moje
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Alexandre Tkatchenko
- Physics and Materials Science Research Unit, University of Luxembourg, Luxembourg City L-1511, Luxembourg
| | - Rainer Herges
- Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
| | - Richard Berndt
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
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9
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Thomas JC, Goronzy DP, Serino AC, Auluck HS, Irving OR, Jimenez-Izal E, Deirmenjian JM, Macháček J, Sautet P, Alexandrova AN, Baše T, Weiss PS. Acid-Base Control of Valency within Carboranedithiol Self-Assembled Monolayers: Molecules Do the Can-Can. ACS NANO 2018; 12:2211-2221. [PMID: 29393628 PMCID: PMC6350814 DOI: 10.1021/acsnano.7b09011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We use simple acid-base chemistry to control the valency in self-assembled monolayers of two different carboranedithiol isomers on Au{111}. Monolayer formation proceeds via Au-S bonding, where manipulation of pH prior to or during deposition enables the assembly of dithiolate species, monothiol/monothiolate species, or combination. Scanning tunneling microscopy (STM) images identify two distinct binding modes in each unmodified monolayer, where simultaneous spectroscopic imaging confirms different dipole offsets for each binding mode. Density functional theory calculations and STM image simulations yield detailed understanding of molecular chemisorption modes and their relation with the STM images, including inverted contrast with respect to the geometric differences found for one isomer. Deposition conditions are modified with controlled equivalents of either acid or base, where the coordination of the molecules in the monolayers is controlled by protonating or deprotonating the second thiol/thiolate on each molecule. This control can be exercised during deposition to change the valency of the molecules in the monolayers, a process that we affectionately refer to as the "can-can." This control enables us to vary the density of molecule-substrate bonds by a factor of 2 without changing the molecular density of the monolayer.
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Affiliation(s)
- John C. Thomas
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Dominic P. Goronzy
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Andrew C. Serino
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Harsharn S. Auluck
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Olivia R. Irving
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Elisa Jimenez-Izal
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- Kimika fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Jacqueline M. Deirmenjian
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Jan Macháček
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i. 250 68 Husinec-Řež, č.p. 1001, Czech Republic
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Anastassia N. Alexandrova
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
| | - Tomáš Baše
- Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i. 250 68 Husinec-Řež, č.p. 1001, Czech Republic
| | - Paul S. Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, United States
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10
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Bouchemella K, Fauché K, Anak B, Jouffret L, Bencharif M, Cisnetti F. Click 1,2,3-triazole derived fluorescent scaffold by mesoionic carbene–nitrene cyclization: an experimental and theoretical study. NEW J CHEM 2018. [DOI: 10.1039/c8nj04070b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Easily accessible compact triazole-based fluorescent compounds were characterized spectroscopically and their properties modeled by computational methods.
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Affiliation(s)
- Khadidja Bouchemella
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF
- F-63000 Clermont-Ferrand
- France
- Laboratoire Chimie des Matériaux, Faculté des Sciences Exactes, Campus de Chaabat Ersas, Université des frères Mentouri-Constantine
- Constantine
| | - Kévin Fauché
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF
- F-63000 Clermont-Ferrand
- France
| | - Barkahem Anak
- Laboratoire Chimie des Matériaux, Faculté des Sciences Exactes, Campus de Chaabat Ersas, Université des frères Mentouri-Constantine
- Constantine
- Algeria
| | - Laurent Jouffret
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF
- F-63000 Clermont-Ferrand
- France
| | - Mustapha Bencharif
- Laboratoire Chimie des Matériaux, Faculté des Sciences Exactes, Campus de Chaabat Ersas, Université des frères Mentouri-Constantine
- Constantine
- Algeria
| | - Federico Cisnetti
- Université Clermont Auvergne, CNRS, SIGMA Clermont, ICCF
- F-63000 Clermont-Ferrand
- France
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11
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Valášek M, Mayor M. Spatial and Lateral Control of Functionality by Rigid Molecular Platforms. Chemistry 2017; 23:13538-13548. [PMID: 28766790 DOI: 10.1002/chem.201703349] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Indexed: 11/11/2022]
Abstract
Surface mounted molecular devices have received significant attention in the scientific community because of their unique ability to construct functional materials. The key involves the platform on which the molecular device works on solid substrates, such as in solid-liquid or solid-vacuum interfaces. Here, we outline the concept of rigid molecular platforms to immobilize active functionality atop flat surfaces in a controllable manner. Most of these (multipodal) platforms have at least three anchoring groups to control the spatial arrangement of the protruding functional moieties and form mechanically stable and electronically tuned contacts to the underlying substrate. Another approach is based on employing of flat aromatic scaffolds bearing perpendicular functionalities that form stable lateral assemblies on various surfaces. Emphasis is placed on the need for controllable assembly and separation of these tailor-made molecules that expose functionalities at the molecular scale. The discussions are focused on the different molecular designs realizing functional 3D architectures on surfaces, the role of various anchoring strategies to control the spatial arrangement, and structural considerations controlling physical features like the coupling to the surface or the available space for sterically demanding molecular operations.
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Affiliation(s)
- Michal Valášek
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Marcel Mayor
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU), Xingang Rd. W., Guangzhou, P. R. China.,Department of Chemistry, University of Basel, St. Johannsring 19, 4056, Basel, Switzerland
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12
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Operamolla A, Punzi A, Farinola GM. Synthetic Routes to Thiol-Functionalized Organic Semiconductors for Molecular and Organic Electronics. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600460] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alessandra Operamolla
- Dipartimento di Chimica; Università degli Studi di Bari Aldo Moro; Via Orabona 4 70126 Bari Italy
- CNR-ICCOM Istituto di Chimica dei Composti Organometallici; Via Orabona 4 70126 Bari Italy
| | - Angela Punzi
- Dipartimento di Chimica; Università degli Studi di Bari Aldo Moro; Via Orabona 4 70126 Bari Italy
| | - Gianluca M. Farinola
- Dipartimento di Chimica; Università degli Studi di Bari Aldo Moro; Via Orabona 4 70126 Bari Italy
- CNR-ICCOM Istituto di Chimica dei Composti Organometallici; Via Orabona 4 70126 Bari Italy
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13
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Lindner M, Valášek M, Homberg J, Edelmann K, Gerhard L, Wulfhekel W, Fuhr O, Wächter T, Zharnikov M, Kolivoška V, Pospíšil L, Mészáros G, Hromadová M, Mayor M. Importance of the Anchor Group Position (ParaversusMeta) in Tetraphenylmethane Tripods: Synthesis and Self-Assembly Features. Chemistry 2016; 22:13218-35. [DOI: 10.1002/chem.201602019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Marcin Lindner
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Michal Valášek
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Jan Homberg
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Kevin Edelmann
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Lukas Gerhard
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Wulf Wulfhekel
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Olaf Fuhr
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
| | - Tobias Wächter
- Applied Physical Chemistry; Heidelberg University; Im Neuenheimer Feld 253 69120 Heidelberg Germany
| | - Michael Zharnikov
- Applied Physical Chemistry; Heidelberg University; Im Neuenheimer Feld 253 69120 Heidelberg Germany
| | - Viliam Kolivoška
- J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i.; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Lubomír Pospíšil
- J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i.; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Gábor Mészáros
- Research Centre for Natural Sciences, HAS; Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Magdaléna Hromadová
- J. Heyrovský Institute of Physical Chemistry of ASCR v.v.i.; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Marcel Mayor
- Institute of Nanotechnology; Karlsruhe Institute of Technology (KIT); P. O. Box 3640 76021 Karlsruhe Germany
- Lehn Institute of Functional Materials (LIFM); Sun Yat-Sen University (SYSU); XinGangXi Rd. 135 510275 Guangzhou P. R. China
- Department of Chemistry; University of Basel; St. Johannsring 19 4056 Basel Switzerland
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14
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Valášek M, Lindner M, Mayor M. Rigid multipodal platforms for metal surfaces. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:374-405. [PMID: 27335731 PMCID: PMC4901557 DOI: 10.3762/bjnano.7.34] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 02/17/2016] [Indexed: 06/05/2023]
Abstract
In this review the recent progress in molecular platforms that form rigid and well-defined contact to a metal surface are discussed. Most of the presented examples have at least three anchoring units in order to control the spatial arrangement of the protruding molecular subunit. Another interesting feature is the lateral orientation of these foot structures which, depending on the particular application, is equally important as the spatial arrangement of the molecules. The numerous approaches towards assembling and organizing functional molecules into specific architectures on metal substrates are reviewed here. Particular attention is paid to variations of both, the core structures and the anchoring groups. Furthermore, the analytical methods enabling the investigation of individual molecules as well as monomolecular layers of ordered platform structures are summarized. The presented multipodal platforms bearing several anchoring groups form considerably more stable molecule-metal contacts than corresponding monopodal analogues and exhibit an enlarged separation of the functional molecules due to the increased footprint, as well as restrict tilting of the functional termini with respect to the metal surface. These platforms are thus ideally suited to tune important properties of the molecule-metal interface. On a single-molecule level, several of these platforms enable the control over the arrangement of the protruding rod-type molecular structures (e.g., molecular wires, switches, rotors, sensors) with respect to the surface of the substrate.
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Affiliation(s)
- Michal Valášek
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Marcin Lindner
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Marcel Mayor
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
- Lehn Institute of Functional Materials (LIFM), Sun Yat-Sen University (SYSU), Xingang Rd. W., Guangzhou, China
- Department of Chemistry, University of Basel, St. Johannsring 19, CH-4056 Basel, Switzerland
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15
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Abstract
A highly site-selective, one-pot, sequential C–N and C–C bond forming process was developed, affording a carbazole-based skeleton that contains biphenyl and diarylacetylene cores.
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Affiliation(s)
- Sheng Tao
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Ning Liu
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Bin Dai
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
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16
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Ie Y, Aso Y. Design and Development of New Functional Units towards Single-Molecule Electronics. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yutaka Ie
- The Institute of Scientific and Industrial Research, Osaka University
| | - Yoshio Aso
- The Institute of Scientific and Industrial Research, Osaka University
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17
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Affiliation(s)
- Sundus Erbas-Cakmak
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - David A. Leigh
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Charlie T. McTernan
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alina
L. Nussbaumer
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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18
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Mezour MA, Perepichka II, Ivasenko O, Lennox RB, Perepichka DF. Tridentate benzylthiols on Au(111): control of self-assembly geometry. NANOSCALE 2015; 7:5014-5022. [PMID: 25695677 DOI: 10.1039/c4nr07207c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A set of hexasubstituted benzene derivatives with three thiol groups in the 1, 3, 5 positions and varied aliphatic substituents in the 2, 4, 6 positions (Me3-BTMT, Et3-BTMT, ODe3-BTMT) has been synthesized and self-assembled on Au(111). The resulting self-assembled monolayers (SAMs) are characterized by scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and electrochemistry. The molecular orientation and long-range order are affected by the “gear effect” of the hexasubstituted benzene ring and van der Waals interactions between the physisorbed alkyl chains drive. Me3-BTMT adopts a standing up orientation which results in the highest molecular surface density but also the lowest degree of chemisorption (1 to 2 Au–S bonds per molecule). In contrast, Et3-BTMT favors a lying down orientation with a greater number of surface-bonded thiol groups (2 to 3) per molecule, associated with the peculiar geometry of this molecule. Finally, ODe3-BTMT adsorbs mainly in a lying down orientation, forming the SAM with the highest degree of chemisorption (all thiol groups are gold-bonded) and the lowest molecular areal density.
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Affiliation(s)
- Mohamed A Mezour
- Department of Chemistry and Centre for Self-Assembled Chemical Structures, McGill University, 801 Sherbrooke St. West, Montreal (QC) H3A 0B8, Canada.
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Abstract
A copper/β-diketone-catalysedN-arylation of carbazoles with aryl iodides is developed with broad substrate applicability and moderate to good yields.
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Affiliation(s)
- Fei Chen
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Ning Liu
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Enhui Ji
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
| | - Bin Dai
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi
- China
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20
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Truong T, Nguyen CV, Truong NT, Phan NTS. Ligand-free N-arylation of heterocycles using metal–organic framework [Cu(INA)2] as an efficient heterogeneous catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra24165k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A metal–organic framework [Cu(INA)2] was synthesized and used as a heterogeneous catalyst for arylation of a wide range of N–H heterocycles and aryl halides under ligand-free conditions.
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Affiliation(s)
- Thanh Truong
- Department of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Chi V. Nguyen
- Department of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Ngoc T. Truong
- Department of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Nam T. S. Phan
- Department of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
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21
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Kitagawa T, Matsubara H, Okazaki T, Komatsu K. Electrochemistry of the self-assembled monolayers of dyads consisting of tripod-shaped trithiol and bithiophene on gold. Molecules 2014; 19:15298-313. [PMID: 25255246 PMCID: PMC6271350 DOI: 10.3390/molecules190915298] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 09/02/2014] [Accepted: 09/17/2014] [Indexed: 11/16/2022] Open
Abstract
Self-assembled monolayers (SAMs) of tripod-shaped trithiols, consisting of an adamantane core with three CH2SH legs and a bithiophene group, were prepared on a Au(111) surface. Adsorption in a tripod-like fashion was supported by polarization modulation-infrared reflection absorption spectroscopy (PM-IRRAS) of the SAMs, which indicated the absence of free SH groups. Cyclic voltammetry showed an irreversible cathodic wave due to reductive desorption. The SAM also showed an anodic wave due to the single-electron oxidation of the bithiophene moiety without concomitant desorption of the molecules. Although oxidation was irreversible in the absence of a protecting group, it became reversible with the introduction of a terminal phenyl group. The charge of the oxidation was one-third that of the reductive desorption, confirming a three-point adsorption. The surface coverage was ca. 50% of that expected for the anti bithiophene conformation, which suggested that an increase in the surface area per molecule had been caused by the presence of an energetically high-lying syn conformer. In accordance with this, the line shape of the oxidation wave suggested an electrostatic repulsive interaction between neighboring molecules.
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Affiliation(s)
- Toshikazu Kitagawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan.
| | - Hiroaki Matsubara
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Takao Okazaki
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Koichi Komatsu
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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Valášek M, Edelmann K, Gerhard L, Fuhr O, Lukas M, Mayor M. Synthesis of Molecular Tripods Based on a Rigid 9,9′-Spirobifluorene Scaffold. J Org Chem 2014; 79:7342-57. [DOI: 10.1021/jo501029t] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Michal Valášek
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
- DFG
Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1a, D-76131 Karlsruhe, Germany
| | - Kevin Edelmann
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Lukas Gerhard
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Olaf Fuhr
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Maya Lukas
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Marcel Mayor
- Institute
of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
- DFG
Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1a, D-76131 Karlsruhe, Germany
- Department
of Chemistry, University of Basel, St. Johannsring 19, CH-4056 Basel, Switzerland
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23
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Márquez IR, Miguel D, Millán A, Marcos ML, de Cienfuegos LÁ, Campaña AG, Cuerva JM. Ti/Ni-Mediated Inter- and Intramolecular Conjugate Addition of Aryl and Alkenyl Halides and Triflates. J Org Chem 2014; 79:1529-41. [DOI: 10.1021/jo402626u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Irene R. Márquez
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
| | - Delia Miguel
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
| | - Alba Millán
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
| | - M. Luisa Marcos
- Departamento
de Química, Universidad Autónoma de Madrid (UAM), Cantoblanco, E-28049 Madrid, Spain
| | | | - Araceli G. Campaña
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
| | - Juan M. Cuerva
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
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Lukas M, Dössel K, Schramm A, Fuhr O, Stroh C, Mayor M, Fink K, v Löhneysen H. A tripodal molecule on a gold surface: orientation-dependent coupling and electronic properties of the molecular legs. ACS NANO 2013; 7:6170-6180. [PMID: 23790078 DOI: 10.1021/nn4020505] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The realization of molecular electronics demands a detailed knowledge of the correlation between chemical groups and electronic function. It has become obvious during the last years that the conformation of a molecule and its coupling to the connecting electrodes plays a crucial role in its conductance behavior and its electronic function, e.g., as a switch. Knowledge about these relationships is therefore essential for future design of molecular electronic building blocks. We present a new three-dimensional molecule, consisting of three identical molecular wires connected to a headgroup. Due to the well-defined spatial arrangement of the molecule in a nonplanar geometry, it is possible to investigate the conductance behavior of these wires with respect to their position and coupling to the surface electrode with the submolecular resolution of a scanning tunneling microscope. The experimental findings are supported by calculations of the electronic structure and conformation of the molecule on the surface by density functional theory with dispersion corrections.
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Affiliation(s)
- Maya Lukas
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76021 Karlsruhe, Germany.
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25
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Synthesis of a novel tetracyclic pyrido[3',2':4,5]thieno[3,2-b]indole system. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1226-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Ramírez-Martínez JF, González-Chávez R, Guerrero-Alba R, Reyes-Gutiérrez PE, Martínez R, Miranda-Morales M, Espinosa-Luna R, González-Chávez MM, Barajas-López C. Dibenzo[1,2,5]thiadiazepines are non-competitive GABAA receptor antagonists. Molecules 2013; 18:894-913. [PMID: 23344200 PMCID: PMC6270094 DOI: 10.3390/molecules18010894] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 12/31/2012] [Accepted: 01/05/2013] [Indexed: 12/25/2022] Open
Abstract
A new process for obtaining dibenzo[c,f][1,2,5]thiadiazepines (DBTDs) and their effects on GABA(A) receptors of guinea pig myenteric neurons are described. Synthesis of DBTD derivatives began with two commercial aromatic compounds. An azide group was obtained after two sequential reactions, and the central ring was closed via a nitrene to obtain the tricyclic sulfonamides (DBTDs). Whole-cell recordings showed that DBTDs application did not affect the holding current but inhibited the currents induced by GABA (I(GABA)), which are mediated by GABA(A) receptors. These DBTDs effects reached their maximum 3 min after application and were: (i) reversible, (ii) concentration-dependent (with a rank order of potency of 2c = 2d > 2b), (iii) mediated by a non-competitive antagonism, and (iv) only observed when applied extracellularly. Picrotoxin (which binds in the channel mouth) and DBTDs effects were not modified when both substances were simultaneous applied. Our results indicate that DBTD acted on the extracellular domain of GABA(A) channels but independent of the picrotoxin, benzodiazepine, and GABA binding sites. DBTDs used here could be the initial model for synthesizing new GABA(A) receptor inhibitors with a potential to be used as antidotes for positive modulators of these receptors or to induce experimental epilepsy.
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Affiliation(s)
- Juan F. Ramírez-Martínez
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, Mexico; E-Mails: (J.F.R.-M.); (R.G.-A.); (R.E.-L.)
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; E-Mails: (R.G.-C.); (P.E.R.-G.)
| | - Rodolfo González-Chávez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; E-Mails: (R.G.-C.); (P.E.R.-G.)
| | - Raquel Guerrero-Alba
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, Mexico; E-Mails: (J.F.R.-M.); (R.G.-A.); (R.E.-L.)
| | - Paul E. Reyes-Gutiérrez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; E-Mails: (R.G.-C.); (P.E.R.-G.)
| | - Roberto Martínez
- Instituto de Química, Universidad Nacional Autónoma de México, Coyoacán 04510, Mexico; E-Mail:
| | - Marcela Miranda-Morales
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico; E-Mail:
| | - Rosa Espinosa-Luna
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, Mexico; E-Mails: (J.F.R.-M.); (R.G.-A.); (R.E.-L.)
| | - Marco M. González-Chávez
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí 78210, Mexico; E-Mails: (R.G.-C.); (P.E.R.-G.)
- Authors to whom correspondence should be addressed; E-Mails: (M.M.G.-C.); (C.B.-L.); Tel.: +52-444-826-2440 (ext. 526) (M.M.G.-C.); Tel.: +52-444-834-2035 (C.B.-L.); Fax: +52-444-834-2010 (C.B.-L.)
| | - Carlos Barajas-López
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí 78216, Mexico; E-Mails: (J.F.R.-M.); (R.G.-A.); (R.E.-L.)
- Authors to whom correspondence should be addressed; E-Mails: (M.M.G.-C.); (C.B.-L.); Tel.: +52-444-826-2440 (ext. 526) (M.M.G.-C.); Tel.: +52-444-834-2035 (C.B.-L.); Fax: +52-444-834-2010 (C.B.-L.)
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27
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Ou Y, Jiao N. Recyclable copper catalyzed nitrogenation of biphenyl halides: a direct approach to carbazoles. Chem Commun (Camb) 2013; 49:3473-5. [DOI: 10.1039/c3cc41443d] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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28
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Sakamoto R, Ohirabaru Y, Matsuoka R, Maeda H, Katagiri S, Nishihara H. Orthogonal bis(terpyridine)–Fe(ii) metal complex oligomer wires on a tripodal scaffold: rapid electron transport. Chem Commun (Camb) 2013; 49:7108-10. [DOI: 10.1039/c3cc42478b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Schramm A, Stroh C, Dössel K, Lukas M, Fischer M, Schramm F, Fuhr O, Löhneysen HV, Mayor M. Tripodal MIIIComplexes on Au(111) Surfaces: Towards Molecular “Lunar Modules”. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200928] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Tegeder P. Optically and thermally induced molecular switching processes at metal surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:394001. [PMID: 22964773 DOI: 10.1088/0953-8984/24/39/394001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Using light to control the switching of functional properties of surface-bound species is an attractive strategy for the development of new technologies with possible applications in molecular electronics and functional surfaces and interfaces. Molecular switches are promising systems for such a route, since they possess the ability to undergo reversible changes between different molecular states and accordingly molecular properties by excitation with light or other external stimuli. In this review, recent experiments on photo- and thermally induced molecular switching processes at noble metal surfaces utilizing two-photon photoemission and surface vibrational spectroscopies are reported. The investigated molecular switches can either undergo a trans-cis isomerization or a ring opening-closure reaction. Two approaches concerning the connection of the switches to the surface are applied: physisorbed switches, i.e. molecules in direct contact with the substrate, and surface-decoupled switches incorporated in self-assembled monolayers. Elementary processes in molecular switches at surfaces, such as excitation mechanisms in photoisomerization and kinetic parameters for thermally driven reactions, which are essential for a microscopic understanding of molecular switching at surfaces, are presented. This in turn is needed for designing an appropriate adsorbate-substrate system with the desired switchable functionality controlled by external stimuli.
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Affiliation(s)
- Petra Tegeder
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, D-14195 Berlin, Germany.
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31
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Amberlyst-15® in PEG: A novel catalytic system for the facile and efficient one-pot synthesis of benzothiazolo-[2,3-b]-quinazolinone derivatives. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4665-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Kimoto A, Tajima Y. Donor-Acceptor-Type Low Bandgap Polymer Carrying Phenylazomethine Moiety as a Metal-Collecting Pendant Unit: Open-Circuit Voltage Modulation of Solution-Processed Organic Photovoltaic Devices Induced by Metal Complexation. ACS Macro Lett 2012; 1:667-671. [PMID: 35607084 DOI: 10.1021/mz3001379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel low-bandgap conjugated polymer with the phenylazomethine moiety as a pendant metal-collecting unit (PImCDTBT) was synthesized via Suzuki cross-coupling copolymerization. Its basic physicochemical properties were revealed, and the optical bandgap and highest occupied molecular orbital (HOMO) energy levels were estimated to be 1.73 eV and -5.36 eV, respectively. PImCDTBT successfully assembles metal ions on its phenylazomethine site, as evidenced by a spectral change similar to that of its monomeric model compounds. In a bulk heterojunction photovoltaic device, the open-circuit voltage was clearly enhanced from 0.46 to 0.52 V by complexation of PImCDTBT, with only 1 wt % of SnCl2. This was due to a change in either the electronic state of the polymer or its environment by complexing with the cationic Sn2+ ion.
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Affiliation(s)
- Atsushi Kimoto
- Center for Intellectual Property
Strategies, RIKEN, 2-1 Hirosawa, Wako 351-0198,
Japan
| | - Yusuke Tajima
- Center for Intellectual Property
Strategies, RIKEN, 2-1 Hirosawa, Wako 351-0198,
Japan
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33
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Routaboul L, Braunstein P, Xiao J, Zhang Z, Dowben PA, Dalmas G, Da Costa V, Félix O, Decher G, Rosa LG, Doudin B. Altering the static dipole on surfaces through chemistry: molecular films of zwitterionic quinonoids. J Am Chem Soc 2012; 134:8494-506. [PMID: 22509815 DOI: 10.1021/ja212104b] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The adsorption of molecular films made of small molecules with a large intrinsic electrical dipole has been explored. The data indicate that such dipolar molecules may be used for altering the interface dipole screening at the metal electrode interface in organic electronics. More specifically, we have investigated the surface electronic spectroscopic properties of zwitterionic molecules containing 12π electrons of the p-benzoquinonemonoimine type, C(6)H(2)(···NHR)(2)(···O)(2)(R = H (1), n-C(4)H(9) (2), C(3)H(6)-S-CH(3) (3), C(3)H(6)-O-CH(3) (4), CH(2)-C(6)H(5) (5)), adsorbed on Au. These molecules are stable zwitterions by virtue of the meta positions occupied by the nitrogen and oxygen substituents on the central ring, respectively. The structures of 2-4 have been determined by single crystal X-ray diffraction and indicate that in these molecules, two chemically connected but electronically not conjugated 6π electron subunits are present, which explains their strong dipolar character. We systematically observed that homogeneous molecular films with thickness as small as 1 nm were formed on Au, which fully cover the surface, even for a variety of R substituents. Preferential adsorption toward the patterned gold areas on SiO(2) substrates was found with 4. Optimum self-assembling of 2 and 5 results in ordered close packed films, which exhibit n-type character, based on the position of the Fermi level close to the conduction band minimum, suggesting high conductivity properties. This new type of self-assembled molecular films offers interesting possibilities for engineering metal-organic interfaces, of critical importance for organic electronics.
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Affiliation(s)
- Lucie Routaboul
- Laboratoire de Chimie de Coordination, Institut de Chimie, Université de Strasbourg, France
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34
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Huang C, Sartin MM, Cozzuol M, Siegel N, Barlow S, Perry JW, Marder SR. Photoinduced Electron Transfer and Nonlinear Absorption in Poly(carbazole-alt-2,7-fluorene)s Bearing Perylene Diimides as Pendant Acceptors. J Phys Chem A 2012; 116:4305-17. [DOI: 10.1021/jp3006712] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Chun Huang
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Matthew M. Sartin
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Matteo Cozzuol
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Nisan Siegel
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Stephen Barlow
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Joseph W. Perry
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Seth R. Marder
- School of Chemistry and Biochemistry and Center for
Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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35
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Crawford AG, Liu Z, Mkhalid IAI, Thibault M, Schwarz N, Alcaraz G, Steffen A, Collings JC, Batsanov AS, Howard JAK, Marder TB. Synthesis of 2‐ and 2,7‐Functionalized Pyrene Derivatives: An Application of Selective CH Borylation. Chemistry 2012; 18:5022-35. [DOI: 10.1002/chem.201103774] [Citation(s) in RCA: 158] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Indexed: 12/31/2022]
Affiliation(s)
- Andrew G. Crawford
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials, Shandong University, 27 Shanda South Road, Jinan, 250100 (P. R. China)
| | | | - Marie‐Hélène Thibault
- Département de Chimie, Université Laval, 1045, avenue de la Médecine, Pavillon Alexandre‐Vachon, Québec, G1V 0A6 (Canada)
| | - Nicolle Schwarz
- Leibniz‐Institut für Katalyse e. V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock (Germany)
| | - Gilles Alcaraz
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse, Cedex 04 (France)
| | - Andreas Steffen
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
| | - Jonathan C. Collings
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
| | - Andrei S. Batsanov
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
| | - Judith A. K. Howard
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
| | - Todd B. Marder
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE (UK), Fax: (+44) 191‐384‐4737
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36
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Vogelsberg CS, Bracco S, Beretta M, Comotti A, Sozzani P, Garcia-Garibay MA. Dynamics of molecular rotors confined in two dimensions: transition from a 2D rotational glass to a 2D rotational fluid in a periodic mesoporous organosilica. J Phys Chem B 2012; 116:1623-32. [PMID: 22220838 DOI: 10.1021/jp2119263] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The motional behavior of p-phenylene-d(4) rotators confined within the 2D layers of a hierarchically ordered periodic mesoporous p-divinylbenzenesilica has been elucidated to evaluate the effects of reduced dimensionality on the engineered dynamics of artificial molecular machines. The hybrid mesoporous material, characterized by a honeycomb lattice structure, has arrays of alternating p-divinylbenzene rotors and siloxane layers forming the molecularly ordered walls of the mesoscopic channels. The p-divinylbenzene rotors are strongly anchored between two adjacent siloxane sheets, so that the p-phenylene rotators are unable to experience translational diffusion and are allowed to rotate about only one fixed axis. Variable-temperature (2)H NMR experiments revealed that the p-phenylene rotators undergo an exchange process between sites related by 180° and a non-Arrhenius temperature dependence of the dynamics, with reorientational rates ranging from 10(3) to 10(8) Hz between 215 to 305 K. The regime of motion changes rapidly at about 280 K indicating the occurrence of a dynamical transition. The transition was also recognized by a steep change in the heat capacity at constant pressure. As a result of the robust lamellar architecture comprising the pore walls, the orientational dynamic disorder related to the phase transition is only realized in two dimensions within the layers, that is in the plane perpendicular to the channel axis. Thus, the aligned rotors that form the organic layers exhibit unique anisotropic dynamical properties as a result of the architecture's reduced dimensionality. The dynamical disorder restricted to two dimensions constitutes a highly mobile fluidlike rotational phase at room temperature, which upon cooling undergoes a transition to a more rigid glasslike phase. Activation energies of 5.9 and 9.5 kcal/mol respectively have been measured for the two dynamical regimes of rotation. Collectively, our investigation has led to the discovery of an orientationally disordered 2D rotational glass and its transition from rigid to soft at increasing temperature. The spectral narrowing observed in the (2)H NMR experiments at higher temperatures (310-420 K) is consistent with fast rotational dynamics, which remain anisotropic in nature within the robust lamellar architecture. This study suggests that exploiting reduced dimensionality in the design of solid-state artificial molecular machines and functional materials may yield access to behavior previously unrealized in 3D materials.
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Affiliation(s)
- Cortnie S Vogelsberg
- Department of Chemistry, University of California - Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
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37
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Casher DL, Kobr L, Michl J. Average orientation of a molecular rotor embedded in a Langmuir-Blodgett monolayer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1625-1637. [PMID: 22133069 DOI: 10.1021/la2037789] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A molecular rotor in which a naphthalene rotator is attached through a silicon atom to three fatty acid chains has been synthesized, and Langmuir-Blodgett techniques were used to deposit on silica surfaces monolayers of its calcium salt, both neat and diluted with stearic acid salts. The monolayer films have been characterized by ellipsometry and Fourier transform infrared (FT-IR) grazing-incidence attenuated total internal reflection (GATR) spectroscopy on Si-SiO(2) and by UV-vis absorption spectroscopy on SiO(2). The measurements were combined with calculations of the electronic (INDO/S) and vibrational (DFT) transition moment directions to deduce the average orientation of the rotor molecules, including the naphthalene ring, relative to the surface. In both neat and mixed films, the naphthalene ring is found to preferentially tilt toward the surface, enough that its rotation is most likely hindered. A comparable picture was obtained from molecular mechanics calculations on a mixed film of the naphthalene rotor and stearic acid.
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Affiliation(s)
- Deborah L Casher
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, USA
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38
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Stadler AM, Ramírez J. Synthetic molecular machines and polymer/monomer size switches that operate through dynamic and non-dynamic covalent changes. Top Curr Chem (Cham) 2012; 322:261-289. [PMID: 22169959 DOI: 10.1007/128_2011_278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present chapter is focused on how synthetic molecular machines (e.g. shuttles, switches and molecular motors) and size switches (conversions between polymers and their units, i.e., conversions between relatively large and small molecules) can function through covalent changes. Amongst the interesting examples of devices herein presented are molecular motors and size switches based on dynamic covalent chemistry which is an area of constitutional dynamic chemistry.
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Affiliation(s)
- Adrian-Mihail Stadler
- Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg, Strasbourg, France.
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39
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Vogelsberg CS, Garcia-Garibay MA. Crystalline molecular machines: function, phase order, dimensionality, and composition. Chem Soc Rev 2011; 41:1892-910. [PMID: 22012174 DOI: 10.1039/c1cs15197e] [Citation(s) in RCA: 271] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The design of molecular machines is stimulated by the possibility of developing new materials with complex physicochemical and mechanical properties that are responsive to external stimuli. Condensed-phase matter with anisotropic molecular order and controlled dynamics, also defined as amphidynamic crystals, offers a promising platform for the design of bulk materials capable of performing such functions. Recent studies have shown that it is possible to engineer molecular crystals and extended solids with Brownian rotation about specific axes that can be interfaced with external fields, which may ultimately be used to design novel optoelectronic materials. Structure/function relationships of amphidynamic materials have been characterized, establishing the blueprints to further engineer sophisticated function. However, the synthesis of amphidynamic molecular machines composed of multiple "parts" is essential to realize increasingly complex behavior. Recent progress in amphidynamic multicomponent systems suggests that sophisticated functions similar to those of simple biomolecular machines may eventually be within reach.
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Affiliation(s)
- Cortnie S Vogelsberg
- Department of Chemistry, University of California Los Angeles, Los Angeles, California, USA
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40
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Casher DL, Kobr L, Michl J. Electronic and vibrational transition moment directions in 7-dimethylamino-3-methyl-N-methyl-d3-4-phenylethynylcarbostyril. J Phys Chem A 2011; 115:11167-78. [PMID: 21639082 DOI: 10.1021/jp2031253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report the synthesis and photophysical characterization of 7-dimethylamino-3-methyl-N-methyl-d(3)-4-phenylethynylcarbostyril, a chromophore of interest as a rotator in surface-mounted molecular rotors. Measurement of UV-vis absorption and fluorescence spectra, steady state fluorescence and excitation anisotropy, and linear dichroism in the IR and UV-vis permitted a determination of absolute vibrational and electronic transition moment directions in this previously unreported chromophore. The first singlet-singlet absorption and fluorescence are polarized perpendicular to the axle of the rotator. Density functional theory calculations of electronic excitation and vibrational frequencies gave results in very good agreement with those observed. Calculated IR transition moment directions showed rather poor agreement with experiment.
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Affiliation(s)
- Deborah L Casher
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
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41
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Kwon JK, Cho JH, Ryu YS, Oh SH, Yum EK. N-Arylation of carbazole by microwave-assisted ligand-free catalytic CuI reaction. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Lemouchi C, Vogelsberg CS, Zorina L, Simonov S, Batail P, Brown S, Garcia-Garibay MA. Ultra-fast Rotors for Molecular Machines and Functional Materials via Halogen Bonding: Crystals of 1,4-Bis(iodoethynyl)bicyclo[2.2.2]octane with Distinct Gigahertz Rotation at Two Sites. J Am Chem Soc 2011; 133:6371-9. [DOI: 10.1021/ja200503j] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cyprien Lemouchi
- Laboratoire MOLTECH-Anjou, Université d’Angers, CNRS, 2 Boulevard Lavoisier, 49045 Angers, France
| | - Cortnie S. Vogelsberg
- Department of Chemistry, University of California—Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Leokadiya Zorina
- Laboratoire MOLTECH-Anjou, Université d’Angers, CNRS, 2 Boulevard Lavoisier, 49045 Angers, France
- Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 MD, Russia
| | - Sergey Simonov
- Laboratoire MOLTECH-Anjou, Université d’Angers, CNRS, 2 Boulevard Lavoisier, 49045 Angers, France
- Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432 MD, Russia
| | - Patrick Batail
- Laboratoire MOLTECH-Anjou, Université d’Angers, CNRS, 2 Boulevard Lavoisier, 49045 Angers, France
| | - Stuart Brown
- Department of Physics, University of California—Los Angeles, Box 951547, Los Angeles, California 90095-1569, United States
| | - Miguel A. Garcia-Garibay
- Department of Chemistry, University of California—Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095-1569, United States
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43
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Wang L, Fu Y, Zhu L, Cui G, Liang F, Guo L, Zhang X, Xie Z, Su Z. Synthesis and photovoltaic properties of low-bandgap polymers based on N-arylcarbazole. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.02.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Ogi S, Ikeda T, Wakabayashi R, Shinkai S, Takeuchi M. Mechanically Interlocked Porphyrin Gears Propagating Two Different Rotational Frequencies. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001656] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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45
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Ie Y, Hirose T, Nakamura H, Kiguchi M, Takagi N, Kawai M, Aso Y. Nature of Electron Transport by Pyridine-Based Tripodal Anchors: Potential for Robust and Conductive Single-Molecule Junctions with Gold Electrodes. J Am Chem Soc 2011; 133:3014-22. [DOI: 10.1021/ja109577f] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yutaka Ie
- The Institute of Scientific
and Industrial Research (ISIR), Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- PRESTO-JST, 4-1-8, Honcho, Kawaguchi, Saitama 333-0012, Japan
| | - Tomoya Hirose
- The Institute of Scientific
and Industrial Research (ISIR), Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hisao Nakamura
- Nanosystem Research Institute (NRI)
“RICS”, National Institute of Advanced Industrial Science and Technology (AIST), Central 2,
Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan
| | - Manabu Kiguchi
- Department of Chemistry, Graduate
School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 W4-10, Ookayama, Meguro-ku, Tokyo
152-8551, Japan
| | - Noriaki Takagi
- Department of Advanced Materials
Science, The University of Tokyo, Kashiwa,
Chiba 277-8561, Japan
| | - Maki Kawai
- Department of Advanced Materials
Science, The University of Tokyo, Kashiwa,
Chiba 277-8561, Japan
- Surface Chemistry Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Yoshio Aso
- The Institute of Scientific
and Industrial Research (ISIR), Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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46
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Hirose T, Ie Y, Aso Y. Synthesis of Tripodal-anchor Units Having Pyridine or Amine Functional Groups and Their Adsorption Behavior on Metal Electrodes. CHEM LETT 2011. [DOI: 10.1246/cl.2011.204] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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47
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Huang C, Sartin MM, Siegel N, Cozzuol M, Zhang Y, Hales JM, Barlow S, Perry JW, Marder SR. Photo-induced charge transfer and nonlinear absorption in dyads composed of a two-photon-absorbing donor and a perylene diimide acceptor. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12566d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Ramachandra S, Schuermann KC, Edafe F, Belser P, Nijhuis CA, Reus WF, Whitesides GM, De Cola L. Luminescent ruthenium tripod complexes: properties in solution and on conductive surfaces. Inorg Chem 2010; 50:1581-91. [PMID: 21194229 DOI: 10.1021/ic1002868] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two luminescent ruthenium complexes containing tripod-type end groups linked through a rigid spacer to a phenanthroline derivative, able to confer an axial geometry to the complexes, are described. One of the compounds is functionalized with thioacetate groups in order to link the metal complex to metallic surfaces. The photophysical and electrochemical behavior of the complexes are studied in solution and on conductive substrates and, furthermore, self-assembled monolayers are investigated in a junction using gold and an indium gallium eutectic, as electrodes, and by time-resolved confocal microscopy. The results show that the complexes form very stable and well-ordered monolayers because of the tripod system, which can anchor the complex almost perpendicular to the surfaces.
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Affiliation(s)
- Srinidhi Ramachandra
- Laboratory of Supramolecular Chemistry and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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49
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Ogi S, Ikeda T, Wakabayashi R, Shinkai S, Takeuchi M. A bevel-gear-shaped rotor bearing a double-decker porphyrin complex. Chemistry 2010; 16:8285-90. [PMID: 20572174 DOI: 10.1002/chem.201000276] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Soichiro Ogi
- Macromolecules Group, Organic Nanomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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50
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Leung SYL, Lam WH, Zhu N, Yam VWW. Synthesis, Structural Characterization, and Photophysical Study of Luminescent Face-to-Face Dinuclear Platinum(II) Alkynyl Phosphine Complexes and Their Tetranuclear Mixed-Metal Platinum(II)−Silver(I) and −Copper(I) Complexes. Organometallics 2010. [DOI: 10.1021/om100473q] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Republic of China
| | - Wai Han Lam
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Republic of China
| | - Nianyong Zhu
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Republic of China
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