1
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Li Y, Lin W, Chai SC, Wu J, Annu K, Chen T. Design and Optimization of 1 H-1,2,3-Triazole-4-carboxamides as Novel, Potent, and Selective Inverse Agonists and Antagonists of PXR. J Med Chem 2022; 65:16829-16859. [PMID: 36480704 PMCID: PMC9789209 DOI: 10.1021/acs.jmedchem.2c01640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The pregnane X receptor (PXR) is a key regulator of drug metabolism. Many drugs bind to and activate PXR, causing adverse drug responses. This suggests that PXR inhibitors have therapeutic value, but potent PXR inhibitors have so far been lacking. Herein, we report the structural optimization of a series of 1H-1,2,3-triazole-4-carboxamides compounds that led to the discovery of compound 85 as a selective and the most potent inverse agonist and antagonist of PXR, with low nanomolar IC50 values for binding and cellular activity. Importantly, compound 89, a close analog of 85, is a selective and pure antagonist with low nanomolar IC50 values for binding and cellular activity. This study has provided novel, selective, and most potent PXR inhibitors (a dual inverse agonist/antagonist and a pure antagonist) for use in basic research and future clinical studies and also shed light on how to reduce the binding affinity of a compound to PXR.
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Affiliation(s)
- Yongtao Li
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
| | - Wenwei Lin
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
| | - Sergio C. Chai
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
| | - Jing Wu
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
| | - Kavya Annu
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA
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2
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El Malah T, Farag H, Awad HM, Abdelrahman MT, Shamroukh AH. Design and Click Synthesis of Novel 1- Substituted-4-(3,4-Dimethoxyphenyl)-1 H-1,2,3-Triazole Hybrids for Anticancer Evaluation and Molecular Docking. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2137205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Tamer El Malah
- Photochemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Hanaa Farag
- Pesticide Chemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Hanem Mohamed Awad
- Department of Tanning Materials and Leather Technology, National Research Centre, Cairo, Egypt
| | - Mohamad Taha Abdelrahman
- Radioisotopes Department, Nuclear Research Centre, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Ahmed Hussien Shamroukh
- Photochemistry Department, Chemical Industries Research Institute, National Research Centre, Cairo, Egypt
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3
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Benzothiazole-tethered 1,2,3-triazoles: Synthesis, antimicrobial, antioxidant, and molecular docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Kikkawa Y, Nagasaki M, Tsuzuki S, Fouquet TNJ, Nakamura S, Takenaka Y, Norikane Y, Hiratani K. Well-organised two-dimensional self-assembly controlled by in situ formation of a Cu(II)-coordinated rufigallol derivative: a scanning tunnelling microscopy study. Chem Commun (Camb) 2022; 58:1752-1755. [PMID: 35029616 DOI: 10.1039/d1cc05991b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The two-dimensional self-assembly of rufigallol derivatives and their metal coordination were studied by scanning tunnelling microscopy. Ex situ Cu(II)-coordinated rufigallol derivatives exhibited columnar structures with some defects, whereas regular and linear structures were formed upon in situ metal coordination at solid/liquid interfaces.
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Affiliation(s)
- Yoshihiro Kikkawa
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Mayumi Nagasaki
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Seiji Tsuzuki
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Thierry N J Fouquet
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Sayaka Nakamura
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Yasumasa Takenaka
- Bioplastic Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yasuo Norikane
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Kazuhisa Hiratani
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
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5
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Synthesis, in vitro antimicrobial evaluation, and molecular docking studies of new isatin-1,2,3-triazole hybrids. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131855] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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Liu D, Di B, Peng Z, Yin C, Zhu H, Wen X, Chen Q, Zhu J, Wu K. Surface-mediated ordering of pristine Salen molecules on coinage metals. Inorg Chem Front 2021. [DOI: 10.1039/d0qi00874e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformational isomers of Salen molecules and their self-assembled structures on coinage metal surfaces.
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Affiliation(s)
- Dan Liu
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Bin Di
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Zhantao Peng
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Cen Yin
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Hao Zhu
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Xiaojie Wen
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Qiwei Chen
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei 230029
- China
| | - Kai Wu
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
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7
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El Malah T, Abdel Mageid RE, Awad HM, Nour HF. Copper( i)-catalysed azide–alkyne cycloaddition and antiproliferative activity of mono- and bis-1,2,3-triazole derivatives. NEW J CHEM 2020. [DOI: 10.1039/d0nj04308g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of mono- and bis-1,2,3-triazole derivatives were prepared via the copper(i)-catalysed azide–alkyne cycloaddition between substituted aromatic derivatives, comprising one or two terminal alkyne groups and a selection of aromatic azides.
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Affiliation(s)
- Tamer El Malah
- Photochemistry Department
- Chemical Industries Research Division
- National Research Centre
- Cairo
- Egypt
| | - Randa E. Abdel Mageid
- Photochemistry Department
- Chemical Industries Research Division
- National Research Centre
- Cairo
- Egypt
| | - Hanem M. Awad
- Department of Tanning Materials and Leather Technology
- National Research Centre
- Cairo
- Egypt
| | - Hany F. Nour
- Photochemistry Department
- Chemical Industries Research Division
- National Research Centre
- Cairo
- Egypt
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8
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Ubink J, Enache M, Stöhr M. Bias-induced conformational switching of supramolecular networks of trimesic acid at the solid-liquid interface. J Chem Phys 2018; 148:174703. [PMID: 29739202 DOI: 10.1063/1.5017930] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Using the tip of a scanning tunneling microscope, an electric field-induced reversible phase transition between two planar porous structures ("chickenwire" and "flower") of trimesic acid was accomplished at the nonanoic acid/highly oriented pyrolytic graphite interface. The chickenwire structure was exclusively observed for negative sample bias, while for positive sample bias only the more densely packed flower structure was found. We suggest that the slightly negatively charged carboxyl groups of the trimesic acid molecule are the determining factor for this observation: their adsorption behavior varies with the sample bias and is thus responsible for the switching behavior.
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Affiliation(s)
- J Ubink
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - M Enache
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - M Stöhr
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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9
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Di Giovannantonio M, Contini G. Reversibility and intermediate steps as key tools for the growth of extended ordered polymers via on-surface synthesis. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:093001. [PMID: 29345628 DOI: 10.1088/1361-648x/aaa8cb] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Surface-confined polymerization is a bottom-up strategy to create one- and two-dimensional covalent organic nanostructures with a π-conjugated backbone, which are suitable to be employed in real-life electronic devices, due to their high mechanical resistance and electronic charge transport efficiency. This strategy makes it possible to change the properties of the final nanostructures by a careful choice of the monomer architecture (i.e. of its constituent atoms and their spatial arrangement). Several chemical reactions have been proven to form low-dimensional polymers on surfaces, exploiting a variety of precursors in combination with metal (e.g. Cu, Ag, Au) and insulating (e.g. NaCl, CaCO3) surfaces. One of the main challenges of such an approach is to obtain nanostructures with long-range order, to boost the conductance performances of these materials. Most of the exploited chemical reactions use irreversible coupling between the monomers and, as a consequence, the resulting structures often suffer from poor order and high defect density. This review focuses on the state-of-the-art surface-confined polymerization reactions, with particular attention paid to reversible coupling pathways and irreversible processes including intermediate states, which are key aspects to control to increase the order of the final nanostructure.
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Affiliation(s)
- Marco Di Giovannantonio
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
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10
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Janica I, Patroniak V, Samorì P, Ciesielski A. Imine-Based Architectures at Surfaces and Interfaces: From Self-Assembly to Dynamic Covalent Chemistry in 2D. Chem Asian J 2018; 13:465-481. [DOI: 10.1002/asia.201701629] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Iwona Janica
- Faculty of Chemistry; Adam Mickiewicz University; Umultowska 89b 61-614 Poznań Poland
- Centre for Advanced Technologies; Adam Mickiewicz University; Umultowska 89c 61-614 Poznań Poland
| | - Violetta Patroniak
- Faculty of Chemistry; Adam Mickiewicz University; Umultowska 89b 61-614 Poznań Poland
| | - Paolo Samorì
- CNRS, ISIS; Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Artur Ciesielski
- CNRS, ISIS; Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
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11
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El Malah T, Nour HF. Click Synthesis of Shape-Persistent Azodendrimers and their Orthogonal Self-Assembly to Nanofibres. Aust J Chem 2018. [DOI: 10.1071/ch17644] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The copper(i)-catalyzed azide–alkyne cycloaddition (CuAAC) reaction has been efficiently utilized to synthesize a series of dendrons with amino functionalities. The aminodendrons successfully underwent azodimerization to furnish a series of pyridyl- and phenyl-based azodendrimers with peripheral alkyl or ether side chain substituents. The molecular structures of the azodendrimers were fully assigned using different spectroscopic techniques, such as 1H NMR and 13C NMR, and the molecular weights were determined using MALDI-TOF mass spectrometry. The molecular self-assembly of the azodendrimers was investigated by scanning electron microscopy and transmission electron microscopy, which revealed the formation of highly ordered and uniform self-assembled nanofibres.
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12
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Song Y, Wang Y, Jin Q, Zhou K, Shi Z, Liu PN, Ma YQ. Self-Assembly and Local Manipulation of Au-Pyridyl Coordination Networks on Metal Surfaces. Chemphyschem 2017; 18:2088-2093. [DOI: 10.1002/cphc.201700439] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Yang Song
- Center for Soft Condensed Matter Physics & Interdisciplinary Research; College of Physics, Optoelectronics and Energy; Soochow University; 215006 Suzhou China
| | - Yuxu Wang
- Center for Soft Condensed Matter Physics & Interdisciplinary Research; College of Physics, Optoelectronics and Energy; Soochow University; 215006 Suzhou China
| | - Qiao Jin
- Shanghai Key Laboratory of Functional Materials Chemistry; Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Kun Zhou
- Center for Soft Condensed Matter Physics & Interdisciplinary Research; College of Physics, Optoelectronics and Energy; Soochow University; 215006 Suzhou China
| | - Ziliang Shi
- Center for Soft Condensed Matter Physics & Interdisciplinary Research; College of Physics, Optoelectronics and Energy; Soochow University; 215006 Suzhou China
| | - Pei-Nian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry; Key Lab for Advanced Materials and School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Yu-qiang Ma
- Center for Soft Condensed Matter Physics & Interdisciplinary Research; College of Physics, Optoelectronics and Energy; Soochow University; 215006 Suzhou China
- National Laboratory of Solid State Microstructures and Department of Physics; Nanjing University; Nanjing 210093 China
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13
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Hirsch BE, McDonald KP, Tait SL, Flood AH. Physical and chemical model of ion stability and movement within the dynamic and voltage-gated STM tip–surface tunneling junction. Faraday Discuss 2017; 204:159-172. [DOI: 10.1039/c7fd00104e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The interaction and mobility of ions in complex systems are fundamental to processes throughout chemistry, biology, and physics. However, nanoscale characterization of ion stability and migration remains poorly understood. Here, we examine ion movements to and from physisorbed molecular receptors at solution–graphite interfaces by developing a theoretical model alongside experimental scanning tunneling microscopy (STM) results. The model includes van der Waals forces and electrostatic interactions originating from the surface, tip, and physisorbed receptors, as well as a tip–surface electric field arising from the STM bias voltage (Vb). Our model reveals how both the electric field and tip–surface distance, dtip, can influence anion stability at the receptor binding sites on the surface or at the STM tip, as well as the size of the barrier for anion transitions between those locations. These predictions agree well with prior and new STM results from the interactions of anions with aryl-triazole receptors that order into functional monolayers on graphite. Scanning produces clear resolution at large magnitude negative surface biases (−0.8 V) while resolution degrades at small negative surface biases (−0.4 V). The loss in resolution arises from frequent tip retractions assigned to anion migration within the tip–surface tunneling region. This experimental evidence in combination with support from the model demonstrates a local voltage gating of anions with the STM tip inside physisorbed receptors. This generalized model and experimental evidence may help to provide a basis to understand the nanoscale details of related chemical transformations and their underlying thermodynamic and kinetic preferences.
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Affiliation(s)
| | | | | | - Amar H. Flood
- Department of Chemistry
- Indiana University
- Bloomington
- USA
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14
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Afsari S, Li Z, Borguet E. Amine-Directed Hydrogen-Bonded Two-Dimensional Supramolecular Structures. Chemphyschem 2016; 17:3385-3389. [DOI: 10.1002/cphc.201600686] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Sepideh Afsari
- Department of Chemistry; Temple University; Philadelphia Pennsylvania 19122 USA
| | - Zhihai Li
- Department of Chemistry; Ball State University; Muncie Indiana 47306 USA
| | - Eric Borguet
- Department of Chemistry; Temple University; Philadelphia Pennsylvania 19122 USA
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15
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Liu C, Zhang W, Zeng Q, Lei S. A Photoresponsive Surface Covalent Organic Framework: Surface-Confined Synthesis, Isomerization, and Controlled Guest Capture and Release. Chemistry 2016; 22:6768-73. [DOI: 10.1002/chem.201601199] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Chunhua Liu
- State Key Laboratory of Robotics and System (HIT); Harbin Institute of Technology; Harbin 150080 P. R. of China
| | - Wei Zhang
- College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 P. R. of China
| | - Qingdao Zeng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 P. R. of China
| | - Shengbin Lei
- State Key Laboratory of Robotics and System (HIT); Harbin Institute of Technology; Harbin 150080 P. R. of China
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry, School of Science & Collaborative Innovation, Center of Chemical Science and Engineering (Tianjin); Tianjin University; Tianjin 300072 P. R. of China
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16
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Ciesielski A, El Garah M, Masiero S, Samorì P. Self-assembly of Natural and Unnatural Nucleobases at Surfaces and Interfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:83-95. [PMID: 26488679 DOI: 10.1002/smll.201501017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/19/2015] [Indexed: 06/05/2023]
Abstract
The self-assembly of small organic molecules interacting via non-covalent forces is a viable approach towards the construction of highly ordered nanostructured materials. Among various molecular components, natural and unnatural nucleobases can undergo non-covalent self-association to form supramolecular architectures with ad hoc structural motifs. Such structures, when decorated with appropriate electrically/optically active units, can be used as scaffolds to locate such units in pre-determined positions in 2D on a surface, thereby paving the way towards a wide range of applications, e.g., in optoelectronics. This review discusses some of the basic concepts of the supramolecular engineering of natural and unnatural nucleobases and derivatives thereof as well as self-assembly processes on conductive solid substrates, as investigated by scanning tunnelling microscopy in ultra-high vacuum and at the solid/liquid interface. By unravelling the structure and dynamics of these self-assembled architectures with a sub-nanometer resolution, a greater control over the formation of increasingly sophisticated functional systems is achieved. The ability to understand and predict how nucleobases interact, both among themselves as well as with other molecules, is extremely important, since it provides access to ever more complex DNA- and RNA-based nanostructures and nanomaterials as key components in nanomechanical devices.
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Affiliation(s)
- Artur Ciesielski
- ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Mohamed El Garah
- ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Stefano Masiero
- Dipartimento di Chimica "G. Caimician", Alma Mater Studiorum - Università di Bologna, v. San Giacomo, 11 - 40126, Bologna, Italy
| | - Paolo Samorì
- ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000, Strasbourg, France
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17
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Sun L, Narimatsu T, Tsuchiya S, Tanaka T, Li P, Hayamizu Y. Water stability of self-assembled peptide nanostructures for sequential formation of two-dimensional interstitial patterns on layered materials. RSC Adv 2016. [DOI: 10.1039/c6ra21244a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Sequential-assembly of LEY and GrBP5 peptides on a graphite surface.
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Affiliation(s)
- Linhao Sun
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Takuma Narimatsu
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Shohei Tsuchiya
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Tomohiro Tanaka
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Peiying Li
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
| | - Yuhei Hayamizu
- School of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8550
- Japan
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18
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Lee SL, Fang Y, Velpula G, Cometto FP, Lingenfelder M, Müllen K, Mali KS, De Feyter S. Reversible Local and Global Switching in Multicomponent Supramolecular Networks: Controlled Guest Release and Capture at the Solution/Solid Interface. ACS NANO 2015; 9:11608-17. [PMID: 26550765 DOI: 10.1021/acsnano.5b06081] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Dynamically switchable supramolecular systems offer exciting possibilities in building smart surfaces, the structure and thus the function of which can be controlled by using external stimuli. Here we demonstrate an elegant approach where the guest binding ability of a supramolecular surface can be controlled by inducing structural transitions in it. A physisorbed self-assembled network of a simple hydrogen bonding building block is used as a switching platform. We illustrate that the reversible transition between porous and nonporous networks can be accomplished using an electric field or applying a thermal stimulus. These transitions are used to achieve controlled guest release or capture at the solution-solid interface. The electric field and the temperature-mediated methods of guest release are operative at different length scales. While the former triggers the transition and thus guest release at the nanometer scale, the latter is effective over a much larger scale. The flexibility associated with physisorbed self-assembled networks renders this approach an attractive alternative to conventional switchable systems.
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Affiliation(s)
- Shern-Long Lee
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven , Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Yuan Fang
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven , Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Gangamallaiah Velpula
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven , Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | | | | | - Klaus Müllen
- Max Planck Institute for Polymer Research , D-55128 Mainz, Germany
| | - Kunal S Mali
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven , Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven , Celestijnenlaan 200F, B-3001 Leuven, Belgium
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19
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Hirsch BE, McDonald KP, Flood AH, Tait SL. Living on the edge: Tuning supramolecular interactions to design two-dimensional organic crystals near the boundary of two stable structural phases. J Chem Phys 2015; 142:101914. [PMID: 25770503 DOI: 10.1063/1.4906895] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
One of the benefits of supramolecular assemblies that form at dynamic interfaces is the opportunity to develop condensed phase systems that respond to environmental stimuli. A prerequisite of this responsive behavior is that the supramolecular system be designed to sit very near the stability of two or more crystal structures. We have created such a bi-phasic system with aryl-triazole oligomers by investigating how phase morphology is controlled by the interplay between interactions that involve the oligomer's dipolar cores (Δμ = 3.5 debye), van der Waals contacts of their pendant alkyl chains (C4-C18), and close-contact hydrogen bonding. Scanning tunneling microscopy experiments conducted at the solution-graphite interface allow sub-molecular resolution of the ordered monolayers to unambiguously determine the packing and structure of two principle phases, α and β. The system is balanced very near the edge of phase stability, evidenced by co-existent phases present over short time frames and by the changes in preference between the two 2D supramolecular assemblies that occur with small modifications to the molecular structure. We demonstrate that the bi-phasic behavior can be understood as a balance between electrostatic interactions and van der Waals contacts, two variables within a larger parameter space, allowing synthetic design to move this solution-surface system across the stability boundary of different condensed-phase structures. These findings are a foundation for the development of environmentally responsive 2D supramolecular arrays.
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Affiliation(s)
- Brandon E Hirsch
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Kevin P McDonald
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Amar H Flood
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Steven L Tait
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, USA
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Lee S, Hirsch BE, Liu Y, Dobscha JR, Burke DW, Tait SL, Flood AH. Multifunctional Tricarbazolo Triazolophane Macrocycles: One-Pot Preparation, Anion Binding, and Hierarchical Self-Organization of Multilayers. Chemistry 2015; 22:560-9. [PMID: 26593327 DOI: 10.1002/chem.201503161] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Indexed: 01/23/2023]
Abstract
Programming the synthesis and self-assembly of molecules is a compelling strategy for the bottom-up fabrication of ordered materials. To this end, shape-persistent macrocycles were designed with alternating carbazoles and triazoles to program a one-pot synthesis and to bind large anions. The macrocycles bind anions that were once considered too weak to be coordinated, such as PF6 (-) , with surprisingly high affinities (β2 =10(11) M(-2) in 80:20 chloroform/methanol) and positive cooperativity, α=(4 K2 /K1 )=1200. We also discovered that the macrocycles assemble into ultrathin films of hierarchically ordered tubes on graphite surfaces. The remarkable surface-templated self-assembly properties, as was observed by using scanning tunneling microscopy, are attributed to the complementary pairing of alternating triazoles and carbazoles inscribed into both the co-facial and edge-sharing seams that exist between shape-persistent macrocycles. The multilayer assembly is also consistent with the high degree of molecular self-association observed in solution, with self-association constants of K=300 000 M(-1) (chloroform/methanol 80:20). Scanning tunneling microscopy data also showed that surface assemblies readily sequester iodide anions from solution, modulating their assembly. This multifunctional macrocycle provides a foundation for materials composed of hierarchically organized and nanotubular self-assemblies.
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Affiliation(s)
- Semin Lee
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA).,Current Address: Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 N Mathews Ave, Urbana, IL 61801 (USA)
| | - Brandon E Hirsch
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
| | - Yun Liu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
| | - James R Dobscha
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
| | - David W Burke
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
| | - Steven L Tait
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
| | - Amar H Flood
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, IN 47405 (USA)
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Byrne JP, Kitchen JA, Gunnlaugsson T. The btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] binding motif: a new versatile terdentate ligand for supramolecular and coordination chemistry. Chem Soc Rev 2015; 43:5302-25. [PMID: 24871484 DOI: 10.1039/c4cs00120f] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ligands containing the btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] motif have appeared with increasing regularity over the last decade. This class of ligands, formed in a one pot ‘click’ reaction, has been studied for various purposes, such as for generating d and f metal coordination complexes and supramolecular self-assemblies, and in the formation of dendritic and polymeric networks, etc. This review article introduces btp as a novel and highly versatile terdentate building block with huge potential in inorganic supramolecular chemistry. We will focus on the coordination chemistry of btp ligands with a wide range of metals, and how it compares with other classical pyridyl and polypyridyl based ligands, and then present a selection of applications including use in catalysis, enzyme inhibition, photochemistry, molecular logic and materials, e.g. polymers, dendrimers and gels. The photovoltaic potential of triazolium derivatives of btp and its interactions with anions will also be discussed.
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Affiliation(s)
- Joseph P Byrne
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, University of Dublin, Pearse St, Dublin 2, Ireland.
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22
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Bonacchi S, El Garah M, Ciesielski A, Herder M, Conti S, Cecchini M, Hecht S, Samorì P. Surface-Induced Selection During In Situ Photoswitching at the Solid/Liquid Interface. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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23
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Bonacchi S, El Garah M, Ciesielski A, Herder M, Conti S, Cecchini M, Hecht S, Samorì P. Surface-induced selection during in situ photoswitching at the solid/liquid interface. Angew Chem Int Ed Engl 2015; 54:4865-9. [PMID: 25728405 DOI: 10.1002/anie.201412215] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 01/24/2023]
Abstract
Here we report for the first time a submolecularly resolved scanning tunneling microscopy (STM) study at the solid/liquid interface of the in situ reversible interconversion between two isomers of a diarylethene photoswitch, that is, open and closed form, self-assembled on a graphite surface. Prolonged irradiation with UV light led to the in situ irreversible formation of another isomer as by-product of the reaction, which due to its preferential physisorption accumulates at the surface. By making use of a simple yet powerful thermodynamic model we provide a quantitative description for the observed surface-induced selection of one isomeric form.
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Affiliation(s)
- Sara Bonacchi
- Nanochemistry Laboratory, ISIS & icFRC, Université de Strasbourg & CNRS, 8 allée Gaspard Monge, 67000 Strasbourg (France)
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24
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Ameen MA, El-Shaieb KM, Mohamed AH, Abdel-Latif FF. Exploiting the 1,2,3-Triazole Moiety to Generate Carbazole Molecular Architectures through Click Approach. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.1966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mohamed A. Ameen
- Chemistry Department, Faculty of Science; El Minia University; El Minia 61511 Egypt
| | - Kamal M. El-Shaieb
- Chemistry Department, Faculty of Science; El Minia University; El Minia 61511 Egypt
| | - Asmaa H. Mohamed
- Chemistry Department, Faculty of Science; El Minia University; El Minia 61511 Egypt
| | - Fathy F. Abdel-Latif
- Chemistry Department, Faculty of Science; El Minia University; El Minia 61511 Egypt
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25
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Hirsch BE, McDonald KP, Qiao B, Flood AH, Tait SL. Selective anion-induced crystal switching and binding in surface monolayers modulated by electric fields from scanning probes. ACS NANO 2014; 8:10858-10869. [PMID: 25257197 DOI: 10.1021/nn504685t] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Anion-selective (Br(-) and I(-)) and voltage-driven crystal switching between two differently packed phases (α ⇆ β) was observed in 2D crystalline monolayers of aryl-triazole receptors ordered at solution-graphite interfaces. Addition of Br(-) and I(-) was found to stimulate the α → β phase transformation and to produce ion binding to the β phase assembly, while Cl(-) and BF4(-) addition retained the α phase. Unlike all other surface assemblies of either charged molecules or ion-templated 2D crystallization of metal-ligand or receptor-based adsorbates, the polarity of the electric field between the localized scanning tip and the graphite substrate was found to correlate with phase switching: β → α is driven at -1.5 V, while α → β occurs at +1.1 V. Ion-pairing between the countercations and the guest anions was also observed. These observations are supported by control studies including variation of anion species, relative anion concentration, surface temperature, tip voltage, and scanning time.
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Affiliation(s)
- Brandon E Hirsch
- Department of Chemistry, Indiana University , 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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Tahara K, Katayama K, Blunt MO, Iritani K, De Feyter S, Tobe Y. Functionalized surface-confined pores: guest binding directed by lateral noncovalent interactions at the solid-liquid interface. ACS NANO 2014; 8:8683-8694. [PMID: 25089732 DOI: 10.1021/nn503815q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present here the construction of self-assembled two-dimensional (2D) molecular networks that contain pores equipped with functional groups that promote guest-specific binding at the liquid/solid interface. For this purpose, a dehydrobenzo[12]annulene (DBA) derivative, DBA-F, having perfluoroalkyl groups at the end of the three alternating alkoxy chains connected by para-phenylene linkers was synthesized. For comparison DBA-H, having the same carbon backbone without fluorine substituents, was also prepared. STM observations revealed that these molecules formed porous 2D networks whose pores were decorated with either fluoroalkane or simple alkane perimeters. Hexakis(phenylethynyl)benzene, HPEB, and its octadecafluoro derivative, HPEB-F surrounded by 18 fluorine atoms, were employed as planar guest molecules of suitable size. The fluoroalkane-lined pores present in the network of DBA-F exhibited good binding ability toward both guest molecules via fluorophilicity and electrostatic interaction, respectively. In contrast the binding ability of the alkane-lined pore of the network of DBA-H for the fluorinated guest HPEB-F was poor as a result of weaker electrostatic interaction. Interestingly, with HPEB as a guest, this network underwent a periodical structural deformation through an induced-fit mechanism to form a superlattice structure consisting of free and occupied pores. These observations are discussed based on modeling experiments using molecular mechanics and quantum chemical methods to elucidate the roles of lateral noncovalent interactions and size matching between the pore and the guest molecules used for 2D guest binding.
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27
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Schulze B, Schubert US. Beyond click chemistry – supramolecular interactions of 1,2,3-triazoles. Chem Soc Rev 2014; 43:2522-71. [DOI: 10.1039/c3cs60386e] [Citation(s) in RCA: 583] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Xie Y, Li Y, Miao X. Concentration induced the interfacial self-assembly polymorphism of 4, 4′-dihexadecyloxy-benzophenon by scanning tunneling microscopy. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ying Xie
- Biochemical Department; Baoding University; Baoding 071000 China
| | - Yijing Li
- College of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 China
| | - Xinrui Miao
- College of Materials Science and Engineering; South China University of Technology; Guangzhou 510640 China
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Assessment of the intramolecular C–H⋯X (X=F, Cl, Br) hydrogen bonding of 1,4-diphenyl-1,2,3-triazoles. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.08.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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El Malah T, Rolf S, Weidner SM, Thünemann AF, Hecht S. Amphiphilic Folded Dendrimer Discs and Their Thermosensitive Self-Assembly in Water. Chemistry 2012; 18:5837-42. [DOI: 10.1002/chem.201200414] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 11/11/2022]
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31
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El Malah T, Ciesielski A, Piot L, Troyanov SI, Mueller U, Weidner S, Samorì P, Hecht S. Conformationally pre-organized and pH-responsive flat dendrons: synthesis and self-assembly at the liquid-solid interface. NANOSCALE 2012; 4:467-472. [PMID: 22139437 DOI: 10.1039/c1nr11434d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Efficient Cu-catalyzed 1,3-dipolar cycloaddition reactions have been used to prepare two series of three regioisomers of G-1 and G-2 poly(triazole-pyridine) dendrons. The G-1 and G-2 dendrons consist of branched yet conformationally pre-organized 2,6-bis(phenyl/pyridyl-1,2,3-triazol-4-yl)pyridine (BPTP) monomeric and trimeric cores, respectively, carrying one focal and either two or four peripheral alkyl side chains. In the solid state, the conformation and supramolecular organization were studied by means of a single crystal X-ray structure analysis of one derivative. At the liquid-solid interface, the self-assembly behavior was investigated by scanning tunneling microscopy (STM) on graphite surfaces. Based on the observed supramolecular organization, it appears that the subtle balance between conformational preferences inherent in the dendritic backbone on the one side and the adsorption and packing of the alkyl side chains on the graphite substrate on the other side dictate the overall structure formation in 2D.
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Affiliation(s)
- Tamer El Malah
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489, Berlin, Germany
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32
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You LY, Chen SG, Zhao X, Liu Y, Lan WX, Zhang Y, Lu HJ, Cao CY, Li ZT. CH⋅⋅⋅O Hydrogen Bonding Induced Triazole Foldamers: Efficient Halogen Bonding Receptors for Organohalogens. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201106996] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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You LY, Chen SG, Zhao X, Liu Y, Lan WX, Zhang Y, Lu HJ, Cao CY, Li ZT. CH⋅⋅⋅O Hydrogen Bonding Induced Triazole Foldamers: Efficient Halogen Bonding Receptors for Organohalogens. Angew Chem Int Ed Engl 2012; 51:1657-61. [DOI: 10.1002/anie.201106996] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Indexed: 01/23/2023]
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34
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Bléger D, Ciesielski A, Samorì P, Hecht S. Photoswitching vertically oriented azobenzene self-assembled monolayers at the solid-liquid interface. Chemistry 2011; 16:14256-60. [PMID: 21108263 DOI: 10.1002/chem.201002834] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- David Bléger
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
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35
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Ciesielski A, Samorì P. Supramolecular assembly/reassembly processes: molecular motors and dynamers operating at surfaces. NANOSCALE 2011; 3:1397-1410. [PMID: 21350766 DOI: 10.1039/c0nr00914h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Among the many significant advances within the field of supramolecular chemistry over the past decades, the development of the so-called "dynamers" features a direct relevance to materials science. Defined as "combinatorial dynamic polymers", dynamers are constitutional dynamic systems and materials resulting from the application of the principles of supramolecular chemistry to polymer science. Like supramolecular materials in general, dynamers are reversible dynamic multifunctional architectures, capable of modifying their constitution by exchanging, recombining, incorporating components. They may exhibit a variety of novel properties and behave as adaptive materials. In this review we focus on the design of responsive switchable monolayers, i.e. monolayers capable to undergo significant changes in their physical or chemical properties as a result of external stimuli. Scanning tunneling microscopy studies provide direct evidence with a sub-nanometre resolution, on the formation and dynamic response of these self-assembled systems featuring controlled geometries and properties.
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Affiliation(s)
- Artur Ciesielski
- Nanochemistry Laboratory, ISIS-CNRS 7006, Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
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36
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Cadeddu A, Ciesielski A, El Malah T, Hecht S, Samorì P. Modulating the self-assembly of rigid “clicked” dendrimers at the solid–liquid interface by tuning non-covalent interactions between side groups. Chem Commun (Camb) 2011; 47:10578-80. [DOI: 10.1039/c1cc13099d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Zornik D, Meudtner RM, El Malah T, Thiele CM, Hecht S. Designing Structural Motifs for Clickamers: Exploiting the 1,2,3-Triazole Moiety to Generate Conformationally Restricted Molecular Architectures. Chemistry 2010; 17:1473-84. [DOI: 10.1002/chem.201002491] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Indexed: 11/06/2022]
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38
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Ciesielski A, Palma CA, Bonini M, Samorì P. Towards supramolecular engineering of functional nanomaterials: pre-programming multi-component 2D self-assembly at solid-liquid interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:3506-3520. [PMID: 20626011 DOI: 10.1002/adma.201001582] [Citation(s) in RCA: 217] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Materials with a pre-programmed order at the supramolecular level can be engineered with a sub-nanometer precision making use of reversible non- covalent interactions. The intrinsic ability of supramolecular materials to recognize and exchange their constituents makes them constitutionally dynamic materials. The tailoring of the materials properties relies on the full control over the self-assembly behavior of molecular modules exposing recognition sites and incorporating functional units. In this review we focus on three classes of weak-interactions to form complex 2D architectures starting from properly designed molecular modules: van der Waals, metallo-ligand and hydrogen bonding. Scanning tunneling microscopy studies will provide evidence with a sub-nanometer resolution, on the formation of responsive multicomponent architectures with controlled geometries and properties. Such endeavor enriches the scientist capability of generating more and more complex smart materials featuring controlled functions and unprecedented properties.
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Affiliation(s)
- Artur Ciesielski
- Nanochemistry Laboratory, ISIS, Université de Strasbourg and CNRS (UMR 7006), 8 allée Gaspard Monge, 67000 Strasbourg, France
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Molecular Dynamics in Two-Dimensional Supramolecular Systems Observed by STM. MATERIALS 2010; 3:4252-4276. [PMID: 28883328 PMCID: PMC5445828 DOI: 10.3390/ma3084252] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 07/26/2010] [Accepted: 08/03/2010] [Indexed: 11/16/2022]
Abstract
Since the invention of scanning tunneling microscopy (STM), 2D supramolecular architectures have been observed under various experimental conditions. The construction of these architectures arises from the balance between interactions at the medium-solid interface. This review summarizes molecular motion observed in 2D-supramolecular structures on surfaces using nanospace resolution STM. The observation of molecular motion on surfaces provides a visual understanding of intermolecular interactions, which are the major driving force behind supramolecular arrangement.
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Ostermeier M, Berlin MA, Meudtner R, Demeshko S, Meyer F, Limberg C, Hecht S. Complexes of Click-Derived Bistriazolylpyridines: Remarkable Electronic Influence of Remote Substituents on Thermodynamic Stability as well as Electronic and Magnetic Properties. Chemistry 2010; 16:10202-13. [DOI: 10.1002/chem.201000721] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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García F, Sánchez L. Dendronized triangular oligo(phenylene ethynylene) amphiphiles: nanofibrillar self-assembly and dye encapsulation. Chemistry 2010; 16:3138-46. [PMID: 20119992 DOI: 10.1002/chem.200902894] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Triangular-shaped oligo(phenylene ethynylene) amphiphiles 1a and 1b decorated in their periphery with two- and four-branched hydrophilic triethyleneglycol dendron wedges, have been synthesized and their self-assembling properties in solution and onto surfaces investigated. The steric demand produced by the dendritic substituents induces a face-to-face rotated pi stacking of the aromatic moieties. Studies on the concentration and temperature dependence confirm this mechanism and provide binding constants of 1.2 x 10(5) and 1.7 x 10(5) M(-1) in acetonitrile for 1a and 1b, respectively. Dynamic and static light scattering measurements complement the study of the self-assembly in solution and demonstrate the formation of rod-like supramolecular structures in aqueous solution. The nanofibers formed in solution can be efficiently transferred onto surfaces. Thus, TEM images reveal the presence of strands of various thickness, with the most common being several micrometers long and with diameters of around 70 nm. Some of these nanofibers present folded edges that are indicative of their ribbon-like nature. Interestingly, compound 1b can also form thick filaments with a rope-like appearance, which points to a chiral arrangement of the fibers. AFM images under highly diluted conditions also reveal long fibers with height profiles that fit well with the molecular dimensions calculated for both amphiphiles. Finally, we have demonstrated the intercalation of the hydrophobic dye Disperse Orange 3 within the filaments and its subsequent release upon increasing the temperature.
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Affiliation(s)
- Fátima García
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria, s/n. 28040 Madrid, Spain
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