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Aftahy K, Arrasate P, Bashkirov PV, Kuzmin PI, Maurizot V, Huc I, Frolov VA. Molecular Sensing and Manipulation of Protein Oligomerization in Membrane Nanotubes with Bolaamphiphilic Foldamers. J Am Chem Soc 2023; 145:25150-25159. [PMID: 37948300 PMCID: PMC10682987 DOI: 10.1021/jacs.3c05753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 11/12/2023]
Abstract
Adaptive and reversible self-assembly of supramolecular protein structures is a fundamental characteristic of dynamic living matter. However, the quantitative detection and assessment of the emergence of mesoscale protein complexes from small and dynamic oligomeric precursors remains highly challenging. Here, we present a novel approach utilizing a short membrane nanotube (sNT) pulled from a planar membrane reservoir as nanotemplates for molecular reconstruction, manipulation, and sensing of protein oligomerization and self-assembly at the mesoscale. The sNT reports changes in membrane shape and rigidity caused by membrane-bound proteins as variations of the ionic conductivity of the sNT lumen. To confine oligomerization to the sNT, we have designed and synthesized rigid oligoamide foldamer tapes (ROFTs). Charged ROFTs incorporate into the planar and sNT membranes, mediate protein binding to the membranes, and, driven by the luminal electric field, shuttle the bound proteins between the sNT and planar membranes. Using Annexin-V (AnV) as a prototype, we show that the sNT detects AnV oligomers shuttled into the nanotube by ROFTs. Accumulation of AnV on the sNT induces its self-assembly into a curved lattice, restricting the sNT geometry and inhibiting the material uptake from the reservoir during the sNT extension, leading to the sNT fission. By comparing the spontaneous and ROFT-mediated entry of AnV into the sNT, we reveal how intricate membrane curvature sensing by small AnV oligomers controls the lattice self-assembly. These results establish sNT-ROFT as a powerful tool for molecular reconstruction and functional analyses of protein oligomerization and self-assembly, with broad application to various membrane processes.
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Affiliation(s)
- Kathrin Aftahy
- Department
of Pharmacy, Ludwig-Maximilians-Universität
München, Munich 81377, Germany
| | - Pedro Arrasate
- Biofisika
Institute (CSIC, UPV/EHU), University of
the Basque Country, Leioa 48940, Spain
- Department
of Biochemistry and Molecular Biology, University
of the Basque Country, Leioa 48940, Spain
| | - Pavel V. Bashkirov
- Research
Institute for Systems Biology and Medicine, Moscow 117246, Russia
| | - Petr I. Kuzmin
- A.N.
Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow 119071, Russia
| | - Victor Maurizot
- Univ. Bordeaux,
CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), Pessac 33600, France
| | - Ivan Huc
- Department
of Pharmacy, Ludwig-Maximilians-Universität
München, Munich 81377, Germany
| | - Vadim A. Frolov
- Biofisika
Institute (CSIC, UPV/EHU), University of
the Basque Country, Leioa 48940, Spain
- Department
of Biochemistry and Molecular Biology, University
of the Basque Country, Leioa 48940, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48009, Spain
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2
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Tantak M, Rayala R, Deng Z, Bunnell A, Wang T, Chaudhari P, Leng F, Nefzi A. Polyheterocyclic peptidomimetics: Parallel solid phase synthesis of oligo cyclic guanidines and their inhibition activity against Mycobacterium tuberculosis DNA gyrase. Bioorg Med Chem Lett 2023; 93:129439. [PMID: 37557925 PMCID: PMC10993493 DOI: 10.1016/j.bmcl.2023.129439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/01/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023]
Abstract
Polyheterocycles are one of the most desired synthetic targets due to their numerous and valuable applications in various fields. We report the design and the parallel synthesis of novel linear oligocyclic guanidine peptidomimetics from predesigned reduced polyamides. A screening of these compounds identified active Mycobacterium tuberculosis DNA gyrase inhibitors which do not inhibit human DNA topoisomerase IIα and topoisomerase I.
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Affiliation(s)
- Mukund Tantak
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA
| | - Ramanjaneyulu Rayala
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA
| | - Zifang Deng
- Department of Chemistry & Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL 33199, USA
| | - Ashley Bunnell
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA
| | - Ting Wang
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA
| | - Prakash Chaudhari
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA
| | - Fenfei Leng
- Department of Chemistry & Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL 33199, USA
| | - Adel Nefzi
- Center for Translational Science, Florida International University, 11350 SW Village Parkway, Port Saint Lucie, FL 34987, USA; Herbert Wertheim College of Medicine, FIU, 11200 SW 8th St, Miami, FL 33199, USA.
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3
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Barakat A, El‐Faham A, Haukka M, Al‐Majid AM, Soliman SM. s
‐Triazine pincer ligands: Synthesis of their metal complexes, coordination behavior, and applications. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6317] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science King Saud University PO Box 2455 Riyadh 11451 Saudi Arabia
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
| | - Ayman El‐Faham
- Department of Chemistry, College of Science King Saud University PO Box 2455 Riyadh 11451 Saudi Arabia
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
| | - Matti Haukka
- Department of Chemistry University of Jyväskylä PO Box 35 Jyväskylä FI‐40014 Finland
| | | | - Saied M. Soliman
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
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4
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Rinaldi S. The Diverse World of Foldamers: Endless Possibilities of Self-Assembly. Molecules 2020; 25:E3276. [PMID: 32708440 PMCID: PMC7397133 DOI: 10.3390/molecules25143276] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 02/07/2023] Open
Abstract
Different classes of foldamers, which are synthetic oligomers that adopt well-defined conformations in solution, have been the subject of extensive studies devoted to the elucidation of the forces driving their secondary structures and their potential as bioactive molecules. Regardless of the backbone type (peptidic or abiotic), the most important features of foldamers are the high stability, easy predictability and tunability of their folding, as well as the possibility to endow them with enhanced biological functions, with respect to their natural counterparts, by the correct choice of monomers. Foldamers have also recently started playing a starring role in the self-assembly of higher-order structures. In this review, selected articles will be analyzed to show the striking number of self-assemblies obtained for foldamers with different backbones, which will be analyzed in order of increasing complexity. Starting from the simplest self-associations in solution (e.g., dimers of β-strands or helices, bundles, interpenetrating double and multiple helices), the formation of monolayers, vesicles, fibers, and eventually nanostructured solid tridimensional morphologies will be subsequently described. The experimental techniques used in the structural investigation, and in the determination of the driving forces and mechanisms underlying the self-assemblies, will be systematically reported. Where applicable, examples of biomimetic self-assembled foldamers and their interactions with biological components will be described.
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Affiliation(s)
- Samuele Rinaldi
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy
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5
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Chan MHY, Leung SYL, Yam VWW. Rational Design of Multi-Stimuli-Responsive Scaffolds: Synthesis of Luminescent Oligo(ethynylpyridine)-Containing Alkynylplatinum(II) Polypyridine Foldamers Stabilized by Pt···Pt Interactions. J Am Chem Soc 2019; 141:12312-12321. [DOI: 10.1021/jacs.9b04447] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People’s Republic of China
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6
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Wang G, Li M, Pang W, Chen M, Tan C. Lewis acids in situ modulate pyridazine-imine Ni catalysed ethylene (co)polymerisation. NEW J CHEM 2019. [DOI: 10.1039/c9nj01243e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Lewis acid-base interaction between B(iii) Lewis acids and the pyridazine moiety reduced the electron density from the Ni center and in situ modulated the pyridazine-imine nickel catalyzed ethylene (co)polymerisation.
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Affiliation(s)
- Guohong Wang
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei 230026
| | - Min Li
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei 230026
| | - Wenmin Pang
- Hefei National Laboratory for Physical Sciences at the Microscale
- University of Science and Technology of China
- Hefei 230026
- China
| | - Min Chen
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei 230026
| | - Chen Tan
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei 230026
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7
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Lockhart Z, Knipe PC. Conformationally Programmable Chiral Foldamers with Compact and Extended Domains Controlled by Monomer Structure. Angew Chem Int Ed Engl 2018; 57:8478-8482. [PMID: 29737622 PMCID: PMC6055681 DOI: 10.1002/anie.201802822] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/24/2018] [Indexed: 11/17/2022]
Abstract
Foldamers are an important class of abiotic macromolecules, with potential therapeutic applications in the disruption of protein–protein interactions. The majority adopt a single conformational motif such as a helix. A class of foldamer is now introduced where the choice of heterocycle within each monomer, coupled with a strong conformation‐determining dipole repulsion effect, allows both helical and extended conformations to be selected. Combining these monomers into hetero‐oligomers enables highly controlled exploration of conformational space and projection of side‐chains along multiple vectors. The foldamers were rapidly constructed via an iterative deprotection‐cross‐coupling sequence, and their solid‐ and solution‐phase conformations were analysed by X‐ray crystallography and NMR and CD spectroscopy. These molecules may find applications in protein surface recognition where the interface does not involve canonical peptide secondary structures.
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Affiliation(s)
- Zachariah Lockhart
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, BT9 5AG, UK
| | - Peter C Knipe
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, BT9 5AG, UK
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8
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Lockhart Z, Knipe PC. Conformationally Programmable Chiral Foldamers with Compact and Extended Domains Controlled by Monomer Structure. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zachariah Lockhart
- School of Chemistry and Chemical Engineering Queen's University Belfast David Keir Building Belfast BT9 5AG UK
| | - Peter C. Knipe
- School of Chemistry and Chemical Engineering Queen's University Belfast David Keir Building Belfast BT9 5AG UK
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9
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Yashima E, Ousaka N, Taura D, Shimomura K, Ikai T, Maeda K. Supramolecular Helical Systems: Helical Assemblies of Small Molecules, Foldamers, and Polymers with Chiral Amplification and Their Functions. Chem Rev 2016; 116:13752-13990. [PMID: 27754649 DOI: 10.1021/acs.chemrev.6b00354] [Citation(s) in RCA: 1198] [Impact Index Per Article: 149.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this review, we describe the recent advances in supramolecular helical assemblies formed from chiral and achiral small molecules, oligomers (foldamers), and helical and nonhelical polymers from the viewpoints of their formations with unique chiral phenomena, such as amplification of chirality during the dynamic helically assembled processes, properties, and specific functionalities, some of which have not been observed in or achieved by biological systems. In addition, a brief historical overview of the helical assemblies of small molecules and remarkable progress in the synthesis of single-stranded and multistranded helical foldamers and polymers, their properties, structures, and functions, mainly since 2009, will also be described.
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Affiliation(s)
- Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Kouhei Shimomura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Tomoyuki Ikai
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
| | - Katsuhiro Maeda
- Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
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10
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Chen Y, Zhao Z, Bian Z, Jin R, Kang C, Qiu X, Guo H, Du Z, Gao L. Hexagonal Lyotropic Liquid Crystal from Simple "Abiotic" Foldamers. ChemistryOpen 2016; 5:386-94. [PMID: 27547649 PMCID: PMC4981060 DOI: 10.1002/open.201600007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Indexed: 12/04/2022] Open
Abstract
The motivation of foldamer chemistry is to identify novel building blocks that have the potential to imitate natural species. Peptides and peptide mimetics can form stable helical conformations and further self-assemble into diverse aggregates in water, where it is difficult to isolate a single helix. In contrast, most "abiotic" foldamers may fold into helical structures in solution, but are difficult to assemble into tertiary ones. It remains a challenge to obtain "abiotic" species similar to peptides. In this paper, a novel foldamer scaffold, in which p-phenyleneethynylene units are linked by chiral carbon atoms, was designed and prepared. In very dilute solutions, these oligomers were random coils. The hexamer and octamers could form a hexagonal lyotropic liquid crystal (LC) in CH2Cl2 when the concentrations reached the critical values. The microscopic observations indicated that they could assemble into the nanofibers in the LC. Interestingly, after some LC phases were diluted at room temperature, the nanofibers could be preserved. The good stabilities of the assemblies are possibly attributed to a more compact backbone and more rigid side chains.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
- University of Chinese Academy of SciencesBeijing100049P. R. China
| | - Zhiqiang Zhao
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
- University of Chinese Academy of SciencesBeijing100049P. R. China
| | - Zheng Bian
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Rizhe Jin
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Chuanqing Kang
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Xuepeng Qiu
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Haiquan Guo
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Zhijun Du
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
| | - Lianxun Gao
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P. R. China
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11
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Barboiu M, Stadler AM, Lehn JM. Kontrollierte Faltungs-, Bewegungs- und konstitutionelle Dynamik in polyheterocyclischen molekularen Strängen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201505394] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mihail Barboiu
- Institut Européen des Membranes; CNRS UMR 5635; Place Eugène Bataillon, CC 047 34095 Montpellier Frankreich
| | - Adrian-Mihail Stadler
- Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006); Université de Strasbourg; 8 Allée Gaspard Monge 67000 Strasbourg Frankreich
- Institut für Nanotechnologie (INT); Karlsruhe Institut für Technologie (KIT); 76344 Eggenstein-Leopoldshafen Deutschland
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006); Université de Strasbourg; 8 Allée Gaspard Monge 67000 Strasbourg Frankreich
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12
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Barboiu M, Stadler AM, Lehn JM. Controlled Folding, Motional, and Constitutional Dynamic Processes of Polyheterocyclic Molecular Strands. Angew Chem Int Ed Engl 2016; 55:4130-54. [PMID: 26894262 DOI: 10.1002/anie.201505394] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 12/20/2022]
Abstract
General design principles have been developed for the control of the structural features of polyheterocyclic strands and their effector-modulated shape changes. Induced defined molecular motions permit designed enforcement of helical as well as linear molecular shapes. The ability of such molecular strands to bind metal cations allows the generation of coiling/uncoiling processes between helically folded and extended linear states. Large molecular motions are produced on coordination of metal ions, which may be made reversible by competition with an ancillary complexing agent and fueled by sequential acid/base neutralization energy. The introduction of hydrazone units into the strands confers upon them constitutional dynamics, whereby interconversion between different strand compositions is achieved through component exchange. These features have relevance for nanomechanical devices. We present a morphological and functional analysis of such systems developed in our laboratories.
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Affiliation(s)
- Mihail Barboiu
- Institut Européen des Membranes, CNRS UMR 5635, Place Eugène Bataillon, CC 047, 34095, Montpellier, France
| | - Adrian-Mihail Stadler
- Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France.,Institut für Nanotechnologie (INT), Karlsruhe Institut für Technologie (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (UMR 7006), Université de Strasbourg, 8 Allée Gaspard Monge, 67000, Strasbourg, France.
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13
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Singleton ML, Castellucci N, Massip S, Kauffmann B, Ferrand Y, Huc I. Synthesis of 1,8-diazaanthracenes as building blocks for internally functionalized aromatic oligoamide foldamers. J Org Chem 2014; 79:2115-22. [PMID: 24506270 DOI: 10.1021/jo402852m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The synthesis of a variety of 9-functionalized 1,8-diazaanthracene diesters and amino acids is described. Derivatization at the 9-position relies on facile reactions performed on the 9-chloro and 9-bromomethyl precursors. This has allowed the incorporation of nucleophilic or sensitive functional groups that otherwise cannot be incorporated under standard methods for synthesizing these compounds. Additionally, the synthesis of the protected amino acids via a high-yielding monosaponification and subsequent Curtius rearrangement has been accomplished on a multigram scale. These units, together with the functionalized derivatives, should prove to be useful monomers in the synthesis of aromatic oligoamide foldamers.
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Affiliation(s)
- Michael L Singleton
- University of Bordeaux, CBMN (UMR 5248), Institut Européen de Chimie Biologie, 2 rue Robert Escarpit, 33600 Pessac, France
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14
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Wixe T, Wallentin CJ, Johnson MT, Fristrup P, Lidin S, Wärnmark K. Synthesis of an Orthogonal Topological Analogue of Helicene. Chemistry 2013; 19:14963-9. [DOI: 10.1002/chem.201302278] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Indexed: 11/11/2022]
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15
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Gan Q, Wang Y, Jiang H. Twisted Helical Microfibers by Hierarchical Self-Assembly of an Aromatic Oligoamide Foldamer. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300240] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Wu W, Xu H, Shen D, Qiu T, Fan LJ. One-step synthesis of a thienylenepyridazinylenethienylene-based coil-rod-coil copolymer with enhanced emission and improved fluorescence stability. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26535] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Urgin K, Aubé C, Pipelier M, Blot V, Thobie-Gautier C, Sengmany S, Lebreton J, Léonel E, Dubreuil D, Condon S. Pd-Catalyzed Chemoselective Cross-Coupling Reaction of Triaryl- or Triheteroarylbismuth Compounds with 3,6-Dihalopyridazines. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200977] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Poisson G, Dumarçay-Charbonnier F, Marsura A. Tris-ACE-(6,6′-bipyridyl)-α-cyclodextrin: synthesis and chirality of the tripodal metal complexes. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Cao J, Kline M, Chen Z, Luan B, Lv M, Zhang W, Lian C, Wang Q, Huang Q, Wei X, Deng J, Zhu J, Gong B. Preparation and helical folding of aromatic polyamides. Chem Commun (Camb) 2012; 48:11112-4. [DOI: 10.1039/c2cc35886g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Azeroual S, Surprenant J, Lazzara TD, Kocun M, Tao Y, Cuccia LA, Lehn JM. Mirror symmetry breaking and chiral amplification in foldamer-based supramolecular helical aggregates. Chem Commun (Camb) 2012; 48:2292-4. [DOI: 10.1039/c2cc16266k] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Abstract
The cell nucleus is responsible for the storage, expression, propagation, and maintenance of the genetic material it contains. Highly organized macromolecular complexes are required for these processes to occur faithfully in an extremely crowded nuclear environment. In addition to chromosome territories, the nucleus is characterized by the presence of nuclear substructures, such as the nuclear envelope, the nucleolus, and other nuclear bodies. Other smaller structural entities assemble on chromatin in response to required functions including RNA transcription, DNA replication, and DNA repair. Experiments in living cells over the last decade have revealed that many DNA binding proteins have very short residence times on chromatin. These observations have led to a model in which the assembly of nuclear macromolecular complexes is based on the transient binding of their components. While indeed most nuclear proteins are highly dynamic, we found after an extensive survey of the FRAP literature that an important subset of nuclear proteins shows either very slow turnover or complete immobility. These examples provide compelling evidence for the establishment of stable protein complexes in the nucleus over significant fractions of the cell cycle. Stable interactions in the nucleus may, therefore, contribute to the maintenance of genome integrity. Based on our compilation of FRAP data, we propose an extension of the existing model for nuclear organization which now incorporates stable interactions. Our new “induced stability” model suggests that self-organization, self-assembly, and assisted assembly contribute to nuclear architecture and function.
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Achelle S, Plé N, Turck A. Incorporation of pyridazine rings in the structure of functionalized π-conjugated materials. RSC Adv 2011. [DOI: 10.1039/c1ra00207d] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Tabatchnik-Rebillon A, Aubé C, Bakkali H, Delaunay T, Manh GT, Blot V, Thobie-Gautier C, Renault E, Soulard M, Planchat A, Le Questel JY, Le Guével R, Guguen-Guillouzo C, Kauffmann B, Ferrand Y, Huc I, Urgin K, Condon S, Léonel E, Evain M, Lebreton J, Jacquemin D, Pipelier M, Dubreuil D. Electrochemical synthesis and characterisation of alternating tripyridyl-dipyrrole molecular strands with multiple nitrogen-based donor-acceptor binding sites. Chemistry 2010; 16:11876-89. [PMID: 20839373 DOI: 10.1002/chem.201000859] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Synthesis of alternating pyridine-pyrrole molecular strands composed of two electron-rich pyrrole units (donors) sandwiched between three pyridinic cores (acceptors) is described. The envisioned strategy was a smooth electrosynthesis process involving ring contraction of corresponding tripyridyl-dipyridazine precursors. 2,6-Bis[6-(pyridazin-3-yl)]pyridine ligands 2a-c bearing pyridine residues at the terminal positions were prepared in suitable quantities by a Negishi metal cross-coupling procedure. The yields of heterocyclic coupling between 2-pyridyl zinc bromide reagents 12a-c and 2,6-bis(6-trifluoromethanesulfonylpyridazin-3-yl)pyridine increased from 68 to 95% following introduction of electron-donating methyl groups on the metallated halogenopyridine units. Favorable conditions for preparative electrochemical reduction of tripyridyl-dipyridazines 2b,c were established in THF/acetate buffer (pH 4.6)/acetonitrile to give the targeted 2,6-bis[5-(pyridin-2-yl)pyrrol-2-yl]pyridines 1b and 1c in good yields. The absorption behavior of the donor-acceptor tripyridyl-dipyrrole ligands was evaluated and compared to theoretical calculations. Highly fluorescent properties of these chromophores were found (ν(em)≈2 × 10(4) cm(-1) in MeOH and CH(2)Cl(2)), and both pyrrolic ligands exhibit a remarkable quantum yield in CH(2)Cl(2) (φ(f)=0.10). Structural studies in the solid state established the preferred cis conformation of the dipyrrolic ligands, which adopting a planar arrangement with an embedded molecule of water having a complexation energy exceeding 10 kcal mol(-1). The ability of the tripyridyl-dipyrrole to complex two copper(II) ions in a pentacoordinate square was investigated.
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Affiliation(s)
- Alexandra Tabatchnik-Rebillon
- Laboratoire de Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM), UMR 6230, Université de Nantes, UFR des Sciences et des Techniques, 2, rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
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You L, Zhao X, Li Z. Self-Assembly of Vesicles by a 2,6-Di(7-benzamidy)quinolin-2- yl)pyridine Derivative Tuned by an Amphiphilic Amide Chain. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Urgin K, Barhdadi R, Condon S, Léonel E, Pipelier M, Blot V, Thobie-Gautier C, Dubreuil D. Some mechanistic aspects of a nickel-catalyzed electrochemical cross-coupling between aryl halides and substituted chloropyridazines. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.02.092] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ferrand Y, Kendhale A, Garric J, Kauffmann B, Huc I. Parallel and Antiparallel Triple Helices of Naphthyridine Oligoamides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906401] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ferrand Y, Kendhale A, Garric J, Kauffmann B, Huc I. Parallel and Antiparallel Triple Helices of Naphthyridine Oligoamides. Angew Chem Int Ed Engl 2010; 49:1778-81. [DOI: 10.1002/anie.200906401] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kim HJ, Kim JK, Lee M. Self-assembly of coordination polymers into multi-stranded nanofibers with tunable chirality. Chem Commun (Camb) 2010; 46:1458-60. [DOI: 10.1039/b921020b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Xing L, Wiegert C, Petitjean A. Stereochemical and Conformational Exchanges in N,N′-Di(2-pyridyl)formamidines: An X-ray and 1H NMR Study. J Org Chem 2009; 74:9513-6. [DOI: 10.1021/jo9020453] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liyan Xing
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston ON K7L3N6, Canada
| | - Charline Wiegert
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston ON K7L3N6, Canada
| | - Anne Petitjean
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston ON K7L3N6, Canada
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Shah NH, Butterfoss GL, Nguyen K, Yoo B, Bonneau R, Rabenstein DL, Kirshenbaum K. Oligo(N-aryl glycines): A New Twist on Structured Peptoids. J Am Chem Soc 2008; 130:16622-32. [DOI: 10.1021/ja804580n] [Citation(s) in RCA: 169] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Neel H. Shah
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Glenn L. Butterfoss
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Khanh Nguyen
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Barney Yoo
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Richard Bonneau
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Dallas L. Rabenstein
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
| | - Kent Kirshenbaum
- Department of Chemistry, Center for Genomics & Systems Biology, and Courant Institute of Mathematical Sciences, Department of Computer Science, New York University, New York, New York 10003, and Department of Chemistry, University of California, Riverside, California 92521
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Cai W, Wang GT, Xu YX, Jiang XK, Li ZT. Vesicles and Organogels from Foldamers: A Solvent-Modulated Self-Assembling Process. J Am Chem Soc 2008; 130:6936-7. [DOI: 10.1021/ja801618p] [Citation(s) in RCA: 154] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Cai
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Gui-Tao Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Yun-Xiang Xu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Xi-Kui Jiang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
| | - Zhan-Ting Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China
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Petitjean A, Cuccia LA, Schmutz M, Lehn JM. Naphthyridine-Based Helical Foldamers and Macrocycles: Synthesis, Cation Binding, and Supramolecular Assemblies. J Org Chem 2008; 73:2481-95. [DOI: 10.1021/jo702495u] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anne Petitjean
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France, and Institut Charles Sadron, BP 40016, 6 rue Boussingault, 67083 Strasbourg Cedex, France
| | - Louis A. Cuccia
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France, and Institut Charles Sadron, BP 40016, 6 rue Boussingault, 67083 Strasbourg Cedex, France
| | - Marc Schmutz
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France, and Institut Charles Sadron, BP 40016, 6 rue Boussingault, 67083 Strasbourg Cedex, France
| | - Jean-Marie Lehn
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France, and Institut Charles Sadron, BP 40016, 6 rue Boussingault, 67083 Strasbourg Cedex, France
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Gan Q, Bao C, Kauffmann B, Grélard A, Xiang J, Liu S, Huc I, Jiang H. Quadruple and Double Helices of 8-Fluoroquinoline Oligoamides. Angew Chem Int Ed Engl 2008; 47:1715-8. [DOI: 10.1002/anie.200704938] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Gan Q, Bao C, Kauffmann B, Grélard A, Xiang J, Liu S, Huc I, Jiang H. Quadruple and Double Helices of 8-Fluoroquinoline Oligoamides. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704938] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Northrop BH, Glöckner A, Stang PJ. Functionalized hydrophobic and hydrophilic self-assembled supramolecular rectangles. J Org Chem 2008; 73:1787-94. [PMID: 18247491 DOI: 10.1021/jo702380b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of six new, functionalized 180 degrees pyridyl donor ligands and their coordination-driven self-assembly into supramolecular rectangles is reported. Three of the new donors have been functionalized with hydrophobic straight chain alkane units (C6, C12, and C18) while the remaining three have been functionalized with derivatized di-, tetra-, and hexaethylene glycol hydrophilic units (DEG, TEG, and HEG, respectively). The resulting self-assembled hydrophobic and hydrophilic supramolecular rectangles have been fully characterized by multinuclear NMR and electrospray ionization mass spectrometry. Molecular force field modeling suggests that the functionalized rectangles range in size from roughly 3.0 x 2.9 to 3.0 x 6.0 nm2 in size.
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Affiliation(s)
- Brian H Northrop
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112, USA.
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37
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Petitjean A, Lehn JM. Conformational switching of the pyridine–pyrimidine–pyridine scaffold for ion-controlled FRET. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.05.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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38
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Giuseppone N, Schmitt JL, Lehn JM. Driven Evolution of a Constitutional Dynamic Library of Molecular Helices Toward the Selective Generation of [2 × 2] Gridlike Arrays under the Pressure of Metal Ion Coordination. J Am Chem Soc 2006; 128:16748-63. [PMID: 17177425 DOI: 10.1021/ja0666452] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Constitutional dynamics, self-assembly, and helical-folding control are brought together in the efficient Sc(OTf)3/microwave-catalyzed transimination of helical oligohydrazone strands, yielding highly diverse dynamic libraries of interconverting constituents through assembly, dissociation, and exchange of components. The transimination-type mechanism of the ScIII-promoted exchange, as well as its regioselectivity, occurring only at the extremities of the helical strands, allow one to perform directional terminal polymerization/depolymerization processes when starting with dissymmetric strands. A particular library is subsequently brought to express quantitatively [2 x 2] gridlike metallosupramolecular arrays in the presence of ZnII ions by component recombination generating the correct ligand from the dynamic set of interconverting strands. This behavior represents a process of driven evolution of a constitutional dynamic chemical system under the pressure (coordination interaction) of an external effector (metal ions).
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Affiliation(s)
- Nicolas Giuseppone
- Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France
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Petitjean A, Puntoriero F, Campagna S, Juris A, Lehn JM. Multicomponent Supramolecular Devices: Synthesis, Optical, and Electronic Properties of Bridged Bis-dirhodium and -diruthenium Complexes. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600466] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Gawronski J, Kaik M, Kwit M, Rychlewska U. Solvent induced folding of conformationally bistable helical imide triads. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Enforced Folding of Unnatural Oligomers: Creating Hollow Helices with Nanosized Pores. ADVANCES IN POLYMER SCIENCE 2006. [DOI: 10.1007/12_092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Hu ZQ, Hu HY, Chen CF. Phenanthroline Dicarboxamide-Based Helical Foldamers: Stable Helical Structures in Methanol. J Org Chem 2006; 71:1131-8. [PMID: 16438531 DOI: 10.1021/jo052222r] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of new aromatic oligoamides 2-5 based on 1,10-phenanthroline diacid and o-phenylenediamine have been synthesized through a convergent segment coupling strategy. These oligomers can fold into well-defined helical structures in solution through intramolecular hydrogen bonds and aromatic stacking interactions, which has been established by 1H NMR, fluorescence, and UV/vis spectra. In particular, it was found that the oligomers were more favorable to fold into stable helical structures in methanol than in chloroform and dichloromethane. The helical foldamers formed in the solid state have been characterized by single-crystal X-ray diffraction analysis. The results showed that the high curvature of the strands led to one and a half turns for both 2 and 21, three turns for 4, and nearly four turns for 5.
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Affiliation(s)
- Zhi-Qiang Hu
- Laboratory of Chemical Biology, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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43
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Thébault F, Blake AJ, Wilson C, Champness NR, Schröder M. Synthesis of pyridazinyl ligands for multimetallic complexes. NEW J CHEM 2006. [DOI: 10.1039/b611561f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zong R, Wang D, Hammitt R, Thummel RP. Synthetic Approaches to Polypyridyl Bridging Ligands with Proximal Multidentate Binding Sites. J Org Chem 2005; 71:167-75. [PMID: 16388632 DOI: 10.1021/jo051937r] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reactions: see text] A series of 12 bridging ligands was prepared. These ligands include a central linker appended to two 1,8-naphthyrid-2-yl or two 1,10-phenanthrolin-2-yl units. The linkers include pyridazin-3,6-diyl, 1,8-naphthyrid-2,7-diyl, 2,2'-bipyrid-6,6'-diyl, 1,10-phenanthrolin-2,9-diyl, 1,2-di(2'-pyrid-6'-yl)ethyne, and 3,6-di(2'-pyrid-6'-yl)pyridazine. The ligands were synthesized from the diacetyl derivative of the central linker by a Friedländer condensation with either 2-aminonicotinaldehyde or 8-amino-7-quinolinecarbaldehyde. The precursor diacetyl derivatives were, in turn, prepared by pathways involving Stille and Sonogashira couplings. Examination of the electronic absorption spectra of the bridging ligands shows the strongest correlation to be between pairs of ligands having the same central linker. Complexation studies will follow.
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Affiliation(s)
- Ruifa Zong
- Department of Chemistry, 136 Fleming Building, University of Houston, Houston, Texas 77204-5003, USA
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45
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Metallation of pyridin-2-yldiazines. Use of pyridine ring as ortho-directing group. Diazines. Part 45. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
The title molecule, 2,2';9',2''-ter[1,10]phenanthroline can be prepared from 2,9-dichloro-1,10-phenanthroline in three steps through the corresponding diacetyl intermediate. The ligand acts as a hexadentate with K+, while two molecules form a trinuclear, helical complex with Cu(I), which evidences pi-stacking interactions and Cu-Cu distances of 3.01-3.04 A. Electrochemical analysis shows a strong interaction between the Cu(I) centers.
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Affiliation(s)
- Ruifa Zong
- Department of Chemistry, 136 Fleming Building, University of Houston, Houston, Texas 77204-5003, USA
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47
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Blondeau P, van der Lee A, Barboiu M. Silver(I) Coordination Polymers Containing Heteroditopic Ureidopyridine Ligands: The Role of Ligand Isomerism, Hydrogen Bonding, and Stacking Interactions. Inorg Chem 2005; 44:5649-53. [PMID: 16060614 DOI: 10.1021/ic050278y] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New silver (I) coordination polymers has been successfully designed and synthesized using heteroditopic ureidopyridine ligands 1 and 2 via a combination of coordinations bonds, hydrogen bonding, and pi-pi stacking interactions. This study shows an example of the orientation of the pyridine nitrogen relative to the urea moiety (4-substituted, 1, or 3-substituted, 2), used to control the packing of resulting crystalline coordination polymers. The ureidopyridine ligands present some flexibility because of the conformational rotation around the central urea moiety. The co-complexation of the silver(I) cation by two pyridine moieties and of the PF(6)(-) counteranion by the urea moiety results in the formation of discrete [1(2)Ag](+)PF(6)(-), (3) and [2(2)Ag](+)PF(6)(-), (4) complexes presenting restricted rotation around the central urea functionality. The geometrical information contained in the structures of ligands 1 and 2 and the heteroditopic complexation of silver hexafluorophosphate are fully exploited in an independent manner resulting in the emergence of quasi-rigidly preorganized linear and angular building blocks of 3 and 4, respectively. Additional pi-pi stacking contacts involving interactions between the pi-donor benzene and the pi-acceptor pyridine systems reinforce and direct the self-assembly of the above-described combined structural motifs in the solid state. Accordingly, linear and tubular arrays of pi-pi stacked architectures are generated in the solid state by synergistic and sequential metal ion complexation, hydrogen bonding, and pi-pi stacking interactions.
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Affiliation(s)
- Pascal Blondeau
- Institut Européen des Membranes, IEM-CNRS 5635, Place Eugène Bataillon, Montpellier, France
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Bae J, Choi JH, Yoo YS, Oh NK, Kim BS, Lee M. Helical Nanofibers from Aqueous Self-Assembly of an Oligo(p-phenylene)-Based Molecular Dumbbell. J Am Chem Soc 2005; 127:9668-9. [PMID: 15998054 DOI: 10.1021/ja051961m] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have synthesized an amphiphilic dumbbell-shaped molecule consisting of dodeca-p-phenylene and aliphatic polyether dendrons as flexible end groups. The molecular dumbbell in aqueous solution self-assembles into well-defined left-handed helical cylinders with a diameter (8 nm) of a molecular length scale and a pitch length of 5.6 nm, as confirmed by TEM. These elementary helical fibrils are further assembled to give left-handed superhelical fibers with lengths up to several micrometers. Such a well-defined helical arrangement of conjugated rod building blocks may provide a new strategy for the design of one-dimensional nanostructured materials with biomimetic, electronic, and photonic functions.
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Affiliation(s)
- Jinyoung Bae
- Center for Supramolecular Nano-Assembly and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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Schwab PFH, Smith JR, Michl J. Synthesis and Properties of Molecular Rods. 2. Zig-Zag Rods. Chem Rev 2005; 105:1197-279. [PMID: 15826013 DOI: 10.1021/cr040707u] [Citation(s) in RCA: 170] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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