1
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Teichmann B, Liu B, Hirsch M, Dubey RK, Würthner F. Sequential Synthesis and Secondary Structure Analysis of Two Classes of Perylene Bisimide Oligomers. Org Lett 2024; 26:5544-5548. [PMID: 38912957 DOI: 10.1021/acs.orglett.4c01928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
An iterative step-by-step synthetic approach is employed to form perylene bisimide (PBI) oligomers of defined sizes by connecting the PBI units through their imide positions via a benzyl linker. The versatility of this approach was showcased by its successful implementation on two different PBI building blocks to achieve two separate series of oligomers (up to the pentamer) with modulated conformations: one with an open random coil oligomer and one with an H-type foldamer architecture.
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Affiliation(s)
- Ben Teichmann
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Bin Liu
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Marcel Hirsch
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Rajeev K Dubey
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
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2
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Kundu S, Simserides C. Charge transport in a double-stranded DNA: Effects of helical symmetry and long-range hopping. Phys Rev E 2024; 109:014401. [PMID: 38366456 DOI: 10.1103/physreve.109.014401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 12/07/2023] [Indexed: 02/18/2024]
Abstract
Within a tight-binding framework, we examine conformation-dependent charge transport properties of the DNA double-helix, including helical symmetry and the possibility of multiple charge conduction pathways. Using techniques based on the Green's function method, we inspect changes in the localization properties of DNA in the presence of long-range hopping, with varying disorder strength. We study three characteristic DNA sequences, two periodic and one random. We observe that, in all cases, due to disorder-induced delocalization, the localization length variation is similar. We also investigate the effect of backbone energetics on current-voltage (I-V) responses, using the Landauer-Büttiker formalism. We find that, in the presence of helical symmetry and long-range hopping, due to environmental effects, DNA can undergo a phase transition from semiconductor to insulator.
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Affiliation(s)
- Sourav Kundu
- Department of Physics, GITAM University, Bengaluru Campus, Bengaluru - 561203, Karnatak, India
| | - Constantinos Simserides
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, Zografos, GR-15784, Athens, Greece
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3
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Teng B, Mandal PK, Allmendinger L, Douat C, Ferrand Y, Huc I. Controlling aromatic helix dimerization in water by tuning charge repulsions. Chem Sci 2023; 14:11251-11260. [PMID: 37860656 PMCID: PMC10583700 DOI: 10.1039/d3sc02020g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/14/2023] [Indexed: 10/21/2023] Open
Abstract
Several helically folded aromatic oligoamides were designed and synthesized. The sequences were all water-soluble thanks to the charged side chains borne by the monomers. Replacing a few, sometimes only two, charged side chains by neutral methoxy groups was shown to trigger the formation of various aggregates which could be tentatively assigned to head-to-head stacked dimers of single helices, double helical duplexes and a quadruplex, none of which would form in organic solvent with organic-soluble analogues. The nature of the aggregates was supported by concentration and solvent dependent NMR studies, 1H DOSY experiments, mass spectrometry, and X-ray crystallography or energy-minimized models, as well as analogies with earlier studies. The hydrophobic effect appears to be the main driving force for aggregation but it can be finely modulated by the presence or absence of a small number of charges to an extent that had no precedent in aromatic foldamer architectures. These results will serve as a benchmark for future foldamer design in water.
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Affiliation(s)
- Binhao Teng
- Department of Pharmacy, Ludwig-Maximilians-Universität Butenandtstr. 5-13 81377 München Germany
| | - Pradeep K Mandal
- Department of Pharmacy, Ludwig-Maximilians-Universität Butenandtstr. 5-13 81377 München Germany
| | - Lars Allmendinger
- Department of Pharmacy, Ludwig-Maximilians-Universität Butenandtstr. 5-13 81377 München Germany
| | - Céline Douat
- Department of Pharmacy, Ludwig-Maximilians-Universität Butenandtstr. 5-13 81377 München Germany
| | - Yann Ferrand
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique CBMN UMR 5248, 2 rue Escarpit 33600 Pessac France
| | - Ivan Huc
- Department of Pharmacy, Ludwig-Maximilians-Universität Butenandtstr. 5-13 81377 München Germany
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4
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Sang P, Cai J. Unnatural helical peptidic foldamers as protein segment mimics. Chem Soc Rev 2023; 52:4843-4877. [PMID: 37401344 PMCID: PMC10389297 DOI: 10.1039/d2cs00395c] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Indexed: 07/05/2023]
Abstract
Unnatural helical peptidic foldamers have attracted considerable attention owing to their unique folding behaviours, diverse artificial protein binding mechanisms, and promising applications in chemical, biological, medical, and material fields. Unlike the conventional α-helix consisting of molecular entities of native α-amino acids, unnatural helical peptidic foldamers are generally comprised of well-defined backbone conformers with unique and unnatural structural parameters. Their folded structures usually arise from unnatural amino acids such as N-substituted glycine, N-substituted-β-alanine, β-amino acid, urea, thiourea, α-aminoxy acid, α-aminoisobutyric acid, aza-amino acid, aromatic amide, γ-amino acid, as well as sulfono-γ-AA amino acid. They can exhibit intriguing and predictable three-dimensional helical structures, generally featuring superior resistance to proteolytic degradation, enhanced bioavailability, and improved chemodiversity, and are promising in mimicking helical segments of various proteins. Although it is impossible to include every piece of research work, we attempt to highlight the research progress in the past 10 years in exploring unnatural peptidic foldamers as protein helical segment mimics, by giving some representative examples and discussing the current challenges and future perspectives. We expect that this review will help elucidate the principles of structural design and applications of existing unnatural helical peptidic foldamers in protein segment mimicry, thereby attracting more researchers to explore and generate novel unnatural peptidic foldamers with unique structural and functional properties, leading to more unprecedented and practical applications.
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Affiliation(s)
- Peng Sang
- Tianjian Laboratory of Advanced Biomedical Sciences, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China.
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
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5
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Algar JL, Findlay JA, Preston D. Roles of Metal Ions in Foldamers and Other Conformationally Flexible Supramolecular Systems. ACS ORGANIC & INORGANIC AU 2022; 2:464-476. [PMID: 36855532 PMCID: PMC9955367 DOI: 10.1021/acsorginorgau.2c00021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 11/28/2022]
Abstract
Conformational control is a key prerequisite for much molecular function. As chemists seek to create complex molecules that have applications beyond the academic laboratory, correct spatial positioning is critical. This is particularly true of flexible systems. Conformationally flexible molecules show potential because they resemble in many cases naturally occurring analogues such as the secondary structures found in proteins and peptides such as α-helices and β-sheets. One of the ways in which conformation can be controlled in these molecules is through interaction with or coordination to metal ions. This review explores how secondary structure (i.e., controlled local conformation) in foldamers and other conformationally flexible systems can be enforced or modified through coordination to metal ions. We hope to provide examples that illustrate the power of metal ions to influence this structure toward multiple different outcomes.
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6
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Meier D, Schoof B, Wang J, Li X, Walz A, Huettig A, Schlichting H, Rosu F, Gabelica V, Maurizot V, Reichert J, Papageorgiou AC, Huc I, Barth JV. Structural adaptations of electrosprayed aromatic oligoamide foldamers on Ag(111). Chem Commun (Camb) 2022; 58:8938-8941. [PMID: 35851385 DOI: 10.1039/d2cc03286d] [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
Aromatic foldamers are promising for applications such as molecular recognition and molecular machinery. For many of these, defect free, 2D-crystaline monolayers are needed. To this end, submonolayers were prepared in ultra-high vacuum (UHV) on Ag(111) via electrospray controlled ion beam deposition (ES-CIBD). On the surface, the unfolded state is unambiguously identified by real-space single-molecule imaging using scanning tunnelling microscopy (STM) and it is found to assemble in regular structures.
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Affiliation(s)
- Dennis Meier
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | - Benedikt Schoof
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | - Jinhua Wang
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Xuesong Li
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Andreas Walz
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | - Annette Huettig
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | - Hartmut Schlichting
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | - Frédéric Rosu
- Institut Européen de Chimie et Biologie (UAR3033/US001), Univ. Bordeaux, CNRS, INSERM, F-33600 Pessac, France
| | - Valérie Gabelica
- Institut Européen de Chimie et Biologie (UAR3033/US001), Univ. Bordeaux, CNRS, INSERM, F-33600 Pessac, France.,ARNA (U1212), Univ. Bordeaux, INSERM, CNRS, F-33600 Pessac, France
| | - Victor Maurizot
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Joachim Reichert
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany.
| | | | - Ivan Huc
- Department of Pharmacy, Ludwig-Maximilians-University Munich, D-81377 Munich, Germany. .,Cluster of Excellence e-conversion, D-85748 Garching, Germany
| | - Johannes V Barth
- Physics Department E20, Technical University Munich, D-85748 Garching, Germany. .,Cluster of Excellence e-conversion, D-85748 Garching, Germany
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7
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Bindl D, Mandal PK, Huc I. Generalizing the Aromatic δ‐Amino Acid Foldamer Helix. Chemistry 2022; 28:e202200538. [PMID: 35332956 PMCID: PMC9322652 DOI: 10.1002/chem.202200538] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Indexed: 11/12/2022]
Abstract
A series of aromatic oligoamide foldamer sequences containing different proportions of three δ‐amino acids derived from quinoline, pyridine, and benzene and possessing varying flexibility, for example due to methylene bridges, were synthesized. Crystallographic structures of two key sequences and 1H NMR data in water concur to show that a canonical aromatic helix fold prevails in almost all cases and that helix stability critically depends on the ratio between rigid and flexible units. Notwithstanding subtle variations of curvature, i. e. the numbers of units per turn, the aromatic δ‐peptide helix is therefore shown to be general and tolerant of a great number of sp3 centers. We also demonstrate canonical helical folding upon alternating two monomers that do not promote folding when taken separately: folding occurs with two methylenes between every other unit, not with one methylene between every unit. These findings highlight that a fine‐tuning of helix handedness inversion kinetics, curvature, and side chain positioning in aromatic δ‐peptidic foldamers can be realized by systematically combining different yet compatible δ‐amino acids.
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Affiliation(s)
- Daniel Bindl
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstraße 5–13 München 81377 Germany
| | - Pradeep K. Mandal
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstraße 5–13 München 81377 Germany
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstraße 5–13 München 81377 Germany
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8
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Gole B, Kauffmann B, Tron A, Maurizot V, McClenaghan N, Huc I, Ferrand Y. Selective and Cooperative Photocycloadditions within Multistranded Aromatic Sheets. J Am Chem Soc 2022; 144:6894-6906. [PMID: 35380826 DOI: 10.1021/jacs.2c01269] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A series of aromatic helix-sheet-helix oligoamide foldamers composed of several different photosensitive diazaanthracene units have been designed and synthesized. Molecular objects up to 7 kDa were straightforwardly produced on a 100 mg scale. Nuclear magnetic resonance and crystallographic investigations revealed that helix-sheet-helix architectures can adopt one or two distinct conformations. Sequences composed of an even number of turn units were found to fold in a canonical symmetrical conformation with two helices of identical handedness stacked above and below the sheet segment. Sequences composed of an odd number of turns revealed a coexistence between a canonical fold with helices of opposite handedness and an alternate fold with a twist within the sheet and two helices of identical handedness. The proportions between these species could be manipulated, in some cases quantitatively, being dependent on solvent, temperature, and absolute control of helix handedness. Diazaanthracene units were shown to display distinct reactivity toward [4 + 4] photocycloadditions according to the substituent in position 9. Their organization within the sequences was programmed to allow photoreactions to take place in a specific order. Reaction pathways and kinetics were deciphered and product characterized, demonstrating the possibility to orchestrate successive photoreactions so as to avoid orphan units or to deliberately produce orphan units at precise locations. Strong cooperative effects were observed in which the photoreaction rate was influenced by the presence (or absence) of photoadducts in the structure. Multiple photoreactions within the aromatic sheet eventually lead to structure lengthening and stiffening, locking conformational equilibria. Photoproducts could be thermally reverted.
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Affiliation(s)
- Bappaditya Gole
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
| | - Brice Kauffmann
- Univ. Bordeaux, CNRS, INSERM, Institut Européen de Chimie Biologie (UMS3033/US001), 2 rue Escarpit, 33600 Pessac, France
| | - Arnaud Tron
- Univ. Bordeaux, CNRS, Institut des Sciences Moléculaires (UMR5255), 351 cours de la Libération, 33405 Talence cedex, France
| | - Victor Maurizot
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
| | - Nathan McClenaghan
- Univ. Bordeaux, CNRS, Institut des Sciences Moléculaires (UMR5255), 351 cours de la Libération, 33405 Talence cedex, France
| | - Ivan Huc
- Department of Pharmacy, Ludwig-Maximilians-University, Butenandtstr. 5-13, 81377 Munich, Germany.,Cluster of Excellence e-Conversion, 85748 Garching, Germany
| | - Yann Ferrand
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
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9
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Wang J, Wicher B, Méndez-Ardoy A, Li X, Pecastaings G, Buffeteau T, Bassani DM, Maurizot V, Huc I. Loading Linear Arrays of Cu II Inside Aromatic Amide Helices. Angew Chem Int Ed Engl 2021; 60:18461-18466. [PMID: 34014599 PMCID: PMC8456862 DOI: 10.1002/anie.202104734] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/12/2021] [Indexed: 12/25/2022]
Abstract
The very stable helices of 8-amino-2-quinolinecarboxylic acid oligoamides are shown to uptake CuII ions in their cavity through deprotonation of their amide functions with minimal alteration of their shape, unlike most metallo-organic structures which generally differ from their organic precursors. The outcome is the formation of intramolecular linear arrays of a defined number of CuII centers (up to sixteen in this study) at a 3 Å distance, forming a molecular mimic of a metal wire completely surrounded by an organic sheath. The helices pack in the solid state so that the arrays of CuII extend intermolecularly. Conductive-AFM and cyclic voltammetry suggest that electrons are transported throughout the metal-loaded helices in contrast with hole transport observed for analogous foldamers devoid of metal ions.
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Affiliation(s)
- Jinhua Wang
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Barbara Wicher
- Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780, Poznan, Poland
| | - Alejandro Méndez-Ardoy
- ISM (UMR 5255), Univ. Bordeaux, CNRS, 351, Cours de la Libération, 33405, Talence, France
| | - Xuesong Li
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Gilles Pecastaings
- LCPO (UMR 5629), Bordeaux INP, CNRS, 16, Av. Pey-Berland, 33600, Pessac, France
- CRPP (UMR 5031), Univ. Bordeaux, CNRS, 115 Avenue du Dr Albert Schweitzer, 33600, Pessac, France
| | - Thierry Buffeteau
- ISM (UMR 5255), Univ. Bordeaux, CNRS, 351, Cours de la Libération, 33405, Talence, France
| | - Dario M Bassani
- ISM (UMR 5255), Univ. Bordeaux, CNRS, 351, Cours de la Libération, 33405, Talence, France
| | - Victor Maurizot
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Ivan Huc
- CBMN (UMR 5248), Univ. Bordeaux, CNRS, Bordeaux INP, 2 rue Robert Escarpit, 33600, Pessac, France
- Department of Pharmacy, Ludwig-Maximilians-Universität, Butenandstraße 5-13, 81377, Munich, Germany
- Cluster of Excellence e-conversion, 85748, Garching, Germany
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10
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Wang J, Wicher B, Méndez‐Ardoy A, Li X, Pecastaings G, Buffeteau T, Bassani DM, Maurizot V, Huc I. Loading Linear Arrays of Cu
II
Inside Aromatic Amide Helices. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jinhua Wang
- CBMN (UMR 5248) Univ. Bordeaux CNRS Bordeaux INP 2 rue Robert Escarpit 33600 Pessac France
| | - Barbara Wicher
- Department of Chemical Technology of Drugs Poznan University of Medical Sciences Grunwaldzka 6 60-780 Poznan Poland
| | | | - Xuesong Li
- CBMN (UMR 5248) Univ. Bordeaux CNRS Bordeaux INP 2 rue Robert Escarpit 33600 Pessac France
| | - Gilles Pecastaings
- LCPO (UMR 5629) Bordeaux INP CNRS 16, Av. Pey-Berland 33600 Pessac France
- CRPP (UMR 5031) Univ. Bordeaux CNRS 115 Avenue du Dr Albert Schweitzer 33600 Pessac France
| | - Thierry Buffeteau
- ISM (UMR 5255) Univ. Bordeaux CNRS 351, Cours de la Libération 33405 Talence France
| | - Dario M. Bassani
- ISM (UMR 5255) Univ. Bordeaux CNRS 351, Cours de la Libération 33405 Talence France
| | - Victor Maurizot
- CBMN (UMR 5248) Univ. Bordeaux CNRS Bordeaux INP 2 rue Robert Escarpit 33600 Pessac France
| | - Ivan Huc
- CBMN (UMR 5248) Univ. Bordeaux CNRS Bordeaux INP 2 rue Robert Escarpit 33600 Pessac France
- Department of Pharmacy Ludwig-Maximilians-Universität Butenandstraße 5–13 81377 Munich Germany
- Cluster of Excellence e-conversion 85748 Garching Germany
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11
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Preston D. Discrete Self-Assembled Metallo-Foldamers with Heteroleptic Sequence Specificity. Angew Chem Int Ed Engl 2021; 60:20027-20035. [PMID: 34263526 DOI: 10.1002/anie.202108456] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Indexed: 01/23/2023]
Abstract
Discrete and structurally diverse foldamer sequences are constructed in both natural and abiotic systems primarily using inert connectivity with irreversible organic covalent bonds, serving to preserve the identity of the sequence. The formation of sequences under thermodynamic control using labile coordination bonds would be attractive for synthetic ease and modular capability, but this presents issues regarding sequence preservation. Here is presented an approach integrating palladium(II) metal ions into the sequence itself, with fidelity maintained through use of complementary pairings of ligand arrangements at the metal centre. This is accomplished using sites of different denticity and/or hydrogen bonding capability. In this fashion, discrete and ordered metallo-sequences are formed as thermodynamic products in a single step, and these then fold into defined conformations due to π-π interactions between electron-rich and -poor aromatic regions of the combined componentry.
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Affiliation(s)
- Dan Preston
- Research School of Chemistry, Australian National University, Canberra, ACT, 2600, Australia
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12
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Preston D. Discrete Self‐Assembled Metallo‐Foldamers with Heteroleptic Sequence Specificity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108456] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dan Preston
- Research School of Chemistry Australian National University Canberra ACT 2600 Australia
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13
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Min J, Wang C, Wang L. A new method for detecting intramolecular H-bonds of aromatic amides based on the de-shielding effect of carbonyl groups on β-protons. Phys Chem Chem Phys 2021; 23:13284-13291. [PMID: 34095931 DOI: 10.1039/d1cp01089a] [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
Aromatic amide foldamers with highly predictable conformations possess potential for application in the fields of stereoselective recognition, charge transport and catalysis, whose conformations are commonly limited by the intramolecular hydrogen bonding between amide groups and hydrogen-bonding receptors. Herein, on the basis of the de-shielding effect of carbonyl groups on β-protons, we develop a new method for detecting intramolecular hydrogen bonds of aromatic amide compounds. The solvent-related changes in the βH chemical shifts (Δ(δβH)) and NH chemical shifts (Δ(δNH)) of three kinds of amide compounds, which are frequently used as building blocks of aromatic amide foldamers, were recorded in chloroform, nitromethane, acetonitrile and DMSO. The Δ(δβH) method is found to be highly suitable for studying methoxy-benzamides and fluoro-benzamides in chloroform and DMSO. It is worth noting that a reference compound is not required for applying the Δ(δβH) method, which is an advantage over the Δ(δNH) method. In addition, we extend the Δ(δNH) method from methoxy-benzamides to pyridine-carboxamides and fluoro-benzamides in chloroform and DMSO, and propose that nitromethane and acetonitrile will be possible alternatives for the Δ(δNH) method if a test compound is not soluble in chloroform.
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Affiliation(s)
- Jing Min
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
| | - Chunyu Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
| | - Liyan Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
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14
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Devaux F, Li X, Sluysmans D, Maurizot V, Bakalis E, Zerbetto F, Huc I, Duwez AS. Single-molecule mechanics of synthetic aromatic amide helices: Ultrafast and robust non-dissipative winding. Chem 2021. [DOI: 10.1016/j.chempr.2021.02.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Moreno K, Merlet E, McClenaghan N, Buffeteau T, Ferrand Y, Olivier C. Influence of Positional Isomerism on the Chiroptical Properties of Functional Aromatic Oligoamide Foldamers. Chempluschem 2021; 86:496-503. [PMID: 33755326 DOI: 10.1002/cplu.202100051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/08/2021] [Indexed: 12/25/2022]
Abstract
A series of functionalized quinoline-based aromatic oligoamide foldamers were prepared in their two enantiomeric forms, comprising an enantiopure terminal camphanyl chiral inducer, which governed the adjacent (P-/M-) helical-handedness. Hierarchical chirality transfer was further investigated in chromophore-appended variants via a range of electronic and vibrational spectroscopic techniques, including circularly polarized luminescence, vibrational circular dichroism and fluorescence. Intense total and polarized photoluminescence (up to Φlum =0.39, glum =1.5×10-3 ) was observed in the visible region from these modular multicomponent architectures and a significant influence of positional isomerism was evidenced. The optimal position of a fluorophore substituent on the quinoline hexamers was determined as being position 2 over position 6, as stronger chiroptical features were systematically observed with the 2-positioned derivatives.
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Affiliation(s)
- Kevin Moreno
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33405, Talence Cedex, France
| | - Eric Merlet
- Institut de Chimie et Biologie des Membranes et des Nano-objets, UMR 5248 CNRS, Université de Bordeaux, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Nathan McClenaghan
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33405, Talence Cedex, France
| | - Thierry Buffeteau
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33405, Talence Cedex, France
| | - Yann Ferrand
- Institut de Chimie et Biologie des Membranes et des Nano-objets, UMR 5248 CNRS, Université de Bordeaux, 2 rue Robert Escarpit, 33600, Pessac, France
| | - Céline Olivier
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33405, Talence Cedex, France
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16
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Mateus P, Jacquet A, Méndez-Ardoy A, Boulloy A, Kauffmann B, Pecastaings G, Buffeteau T, Ferrand Y, Bassani DM, Huc I. Sensing a binding event through charge transport variations using an aromatic oligoamide capsule. Chem Sci 2021; 12:3743-3750. [PMID: 34163648 PMCID: PMC8179446 DOI: 10.1039/d0sc06060g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/21/2021] [Indexed: 12/31/2022] Open
Abstract
The selective binding properties of a 13-mer oligoamide foldamer capsule composed of 4 different aromatic subunits are reported. The capsule was designed to recognize dicarboxylic acids through multiple-point interactions owing to a combination of protonation/deprotonation events, H-bonding, and geometrical constraints imparted by the rigidity of the foldamer backbone. Compared to tartaric acid, binding of 2,2-difluorosuccinic acid or 2,2,3,3-tetrafluorosuccinic acid resulted in symmetry breaking due to deprotonation of only one of the two carboxylic acid groups of the encapsulated species as shown by NMR studies in solution and by single-crystal X-ray diffraction in the solid state. An analogous 14-mer foldamer capsule terminated with a thiol anchoring group was used to probe the complexation event in self-assembled monolayers on Au substrates. Ellipsometry and polarization-modulation infrared absorption-reflection spectroscopy studies were consistent with the formation of a single molecule layer of the foldamer capsule oriented vertically with respect to the surface. The latter underwent smooth complexation of 2,2-difluorosuccinic acid with deprotonation of one of the two carboxylic acid groups. A significant (80-fold) difference in the charge transport properties of the monolayer upon encapsulation of the dicarboxylic acid was evidenced from conducting-AFM measurements (S = 1.1 × 10-9 vs. 1.4 × 10-11 ohm-1 for the empty and complexed capsule, respectively). The modulation in conductivity was assigned to protonation of the aromatic foldamer backbone.
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Affiliation(s)
- Pedro Mateus
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5248 CBMN, IECB 2 rue Escarpit 33600 Pessac France
| | - Antoine Jacquet
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5248 CBMN, IECB 2 rue Escarpit 33600 Pessac France
| | | | - Alice Boulloy
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5248 CBMN, IECB 2 rue Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Univ. Bordeaux, CNRS UMS 3033/US001 IECB 2 rue Escarpit 33600 Pessac France
| | - Gilles Pecastaings
- Inst. Polytechnique de Bordeaux, CNRS UMR 5629 LCPO 16, Av. Pey-Berland 33600 Pessac France
| | - Thierry Buffeteau
- Univ. Bordeaux, CNRS UMR 5255 ISM 351, Cours de la Libération 33405 Talence France
| | - Yann Ferrand
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5248 CBMN, IECB 2 rue Escarpit 33600 Pessac France
| | - Dario M Bassani
- Univ. Bordeaux, CNRS UMR 5255 ISM 351, Cours de la Libération 33405 Talence France
| | - Ivan Huc
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5248 CBMN, IECB 2 rue Escarpit 33600 Pessac France
- Department of Pharmacy and Center for Integrated Protein Science, Ludwig-Maximilians-Universität Butenandstraße 5-13 81377 Munich Germany
- Cluster of Excellence e-Conversion 85748 Garching Germany
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17
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Wang J, Wicher B, Maurizot V, Huc I. Oligo-Quinolylene-Vinylene Foldamers. Chemistry 2021; 27:1031-1038. [PMID: 32881144 PMCID: PMC7839515 DOI: 10.1002/chem.202003559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/01/2020] [Indexed: 01/26/2023]
Abstract
Quinoline based aromatic amide foldamers are known to adopt stable folded conformations. We have developed a synthetic approach to produce similar oligomers where all amide bonds, or part of them, have been replaced by an isosteric vinylene group. The results of solution and solid state structural studies show that oligomers exclusively containing vinylene linkages are not well folded, and adopt predominantly flat conformations. In contrast, a vinylene segment flanked by helical oligoamides also folds in a helix, albeit with a slightly lower curvature. The presence of vinylene functions also result in an extension of π-conjugation across the oligomer that may change charge transport properties. Altogether, these results pave the way to foldamers in which both structural control and specific electronic properties may be engineered.
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Affiliation(s)
- Jinhua Wang
- CBMN (UMR5248), Univ. Bordeaux–CNRS–IPBInstitut Européen de Chimie et Biologie2 rue Escarpit33600PessacFrance
| | - Barbara Wicher
- Department of Chemical Technology of DrugsPoznan University of Medical SciencesGrunwaldzka 660-780PoznanPoland
| | - Victor Maurizot
- CBMN (UMR5248), Univ. Bordeaux–CNRS–IPBInstitut Européen de Chimie et Biologie2 rue Escarpit33600PessacFrance
| | - Ivan Huc
- CBMN (UMR5248), Univ. Bordeaux–CNRS–IPBInstitut Européen de Chimie et Biologie2 rue Escarpit33600PessacFrance
- Department of Pharmacy and Cluster e-conversionLudwig-Maximilians-UniversiätButenandtstrasse 5–1381377MünchenGermany
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18
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Derr JB, Tamayo J, Clark JA, Morales M, Mayther MF, Espinoza EM, Rybicka-Jasińska K, Vullev VI. Multifaceted aspects of charge transfer. Phys Chem Chem Phys 2020; 22:21583-21629. [PMID: 32785306 PMCID: PMC7544685 DOI: 10.1039/d0cp01556c] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Charge transfer and charge transport are by far among the most important processes for sustaining life on Earth and for making our modern ways of living possible. Involving multiple electron-transfer steps, photosynthesis and cellular respiration have been principally responsible for managing the energy flow in the biosphere of our planet since the Great Oxygen Event. It is impossible to imagine living organisms without charge transport mediated by ion channels, or electron and proton transfer mediated by redox enzymes. Concurrently, transfer and transport of electrons and holes drive the functionalities of electronic and photonic devices that are intricate for our lives. While fueling advances in engineering, charge-transfer science has established itself as an important independent field, originating from physical chemistry and chemical physics, focusing on paradigms from biology, and gaining momentum from solar-energy research. Here, we review the fundamental concepts of charge transfer, and outline its core role in a broad range of unrelated fields, such as medicine, environmental science, catalysis, electronics and photonics. The ubiquitous nature of dipoles, for example, sets demands on deepening the understanding of how localized electric fields affect charge transfer. Charge-transfer electrets, thus, prove important for advancing the field and for interfacing fundamental science with engineering. Synergy between the vastly different aspects of charge-transfer science sets the stage for the broad global impacts that the advances in this field have.
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Affiliation(s)
- James B Derr
- Department of Biochemistry, University of California, Riverside, CA 92521, USA.
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19
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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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20
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Sadhu S, Buffeteau T, Sandrez S, Hirsch L, Bassani DM. Observing the Migration of Hydrogen Species in Hybrid Perovskite Materials through D/H Isotope Exchange. J Am Chem Soc 2020; 142:10431-10437. [DOI: 10.1021/jacs.0c02597] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subha Sadhu
- Univ.́ de Bordeaux, CNRS, Bordeaux INP, IMS, UMR 5218, ENSCBP F-33405 Talence, France
| | - Thierry Buffeteau
- Univ.́ de Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Talence, France
| | - Simon Sandrez
- Univ.́ de Bordeaux, CNRS, Bordeaux INP, IMS, UMR 5218, ENSCBP F-33405 Talence, France
| | - Lionel Hirsch
- Univ.́ de Bordeaux, CNRS, Bordeaux INP, IMS, UMR 5218, ENSCBP F-33405 Talence, France
| | - Dario M. Bassani
- Univ.́ de Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Talence, France
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21
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Shen P, Huang M, Qian J, Li J, Ding S, Zhou X, Xu B, Zhao Z, Tang BZ. Achieving Efficient Multichannel Conductance in Through‐Space Conjugated Single‐Molecule Parallel Circuits. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pingchuan Shen
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Miaoling Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsInstitute of Physical ChemistryZhejiang Normal University Jinhua Zhejiang 321004 China
| | - Jingyu Qian
- State Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Street Changchun 130012 China
| | - Jinshi Li
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Siyang Ding
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Xiao‐Shun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsInstitute of Physical ChemistryZhejiang Normal University Jinhua Zhejiang 321004 China
| | - Bin Xu
- State Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Street Changchun 130012 China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
- Department of ChemistryThe Hong Kong University of Science & Technology Clear Water Bay Kowloon, Hong Kong China
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22
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Shen P, Huang M, Qian J, Li J, Ding S, Zhou X, Xu B, Zhao Z, Tang BZ. Achieving Efficient Multichannel Conductance in Through‐Space Conjugated Single‐Molecule Parallel Circuits. Angew Chem Int Ed Engl 2020; 59:4581-4588. [DOI: 10.1002/anie.202000061] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 01/14/2023]
Affiliation(s)
- Pingchuan Shen
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Miaoling Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsInstitute of Physical ChemistryZhejiang Normal University Jinhua Zhejiang 321004 China
| | - Jingyu Qian
- State Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Street Changchun 130012 China
| | - Jinshi Li
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Siyang Ding
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Xiao‐Shun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsInstitute of Physical ChemistryZhejiang Normal University Jinhua Zhejiang 321004 China
| | - Bin Xu
- State Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Street Changchun 130012 China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of Technology Guangzhou 510640 China
- Department of ChemistryThe Hong Kong University of Science & Technology Clear Water Bay Kowloon, Hong Kong China
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23
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Castrogiovanni A, Herr P, Larsen CB, Guo X, Sparr C, Wenger OS. Shortcuts for Electron-Transfer through the Secondary Structure of Helical Oligo-1,2-Naphthylenes. Chemistry 2019; 25:16748-16754. [PMID: 31674695 DOI: 10.1002/chem.201904771] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 10/30/2019] [Indexed: 01/24/2023]
Abstract
Atropisomeric 1,2-naphthylene scaffolds provide access to donor-acceptor compounds with helical oligomer-based bridges, and transient absorption studies revealed a highly unusual dependence of the electron-transfer rate on oligomer length, which is due to their well-defined secondary structure. Close noncovalent intramolecular contacts enable shortcuts for electron transfer that would otherwise have to occur over longer distances along covalent pathways, reminiscent of the behavior seen for certain proteins. The simplistic picture of tube-like electron transfer can describe this superposition of different pathways including both the covalent helical backbone, as well as noncovalent contacts, contrasting the wire-like behavior reported many times before for more conventional molecular bridges. The exquisite control over the molecular architecture, achievable with the configurationally stable and topologically defined 1,2-naphthylene-based scaffolds, is of key importance for the tube-like electron transfer behavior. Our insights are relevant for the emerging field of multidimensional electron transfer and for possible future applications in molecular electronics.
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Affiliation(s)
| | - Patrick Herr
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Christopher B Larsen
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Xingwei Guo
- Current address: Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China
| | - Christof Sparr
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
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24
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Verreault D, Moreno K, Merlet É, Adamietz F, Kauffmann B, Ferrand Y, Olivier C, Rodriguez V. Hyper-Rayleigh Scattering as a New Chiroptical Method: Uncovering the Nonlinear Optical Activity of Aromatic Oligoamide Foldamers. J Am Chem Soc 2019; 142:257-263. [DOI: 10.1021/jacs.9b09890] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dominique Verreault
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France
| | - Kevin Moreno
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France
| | - Éric Merlet
- Institut de Chimie et Biologie des Membranes et des Nano-objets, UMR 5248 CNRS, Université de Bordeaux, 2 rue Robert Escarpit, F-33600 Pessac, France
| | - Frédéric Adamietz
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France
| | - Brice Kauffmann
- Institut Européen de Chimie et Biologie, UMS 3033 CNRS, Université de Bordeaux, 2 rue Robert Escarpit, F-33600 Pessac, France
| | - Yann Ferrand
- Institut de Chimie et Biologie des Membranes et des Nano-objets, UMR 5248 CNRS, Université de Bordeaux, 2 rue Robert Escarpit, F-33600 Pessac, France
| | - Céline Olivier
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France
| | - Vincent Rodriguez
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, F-33405 Talence Cedex, France
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25
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Wei TB, Ma XQ, Fan YQ, Jiang XM, Dong HQ, Yang QY, Zhang YF, Yao H, Lin Q, Zhang YM. Aggregation-induced emission supramolecular organic framework (AIE SOF) gels constructed from tri-pillar[5]arene-based foldamer for ultrasensitive detection and separation of multi-analytes. SOFT MATTER 2019; 15:6753-6758. [PMID: 31397832 DOI: 10.1039/c9sm01385g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, a novel aggregation-induced emission supramolecular organic framework (AIE SOF) with ultrasensitive response, termed FSOF, was constructed using a tri-pillar[5]arene-based foldamer. Interestingly, benefiting from the noise signal shielding properties of FSOF as well as the competition between the cationπ and ππ interactions, the FSOF shows an ultrasensitive response for multi-analytes, such as Fe3+, Hg2+ and Cr3+. The limits of detection (LODs) of the FSOF for Fe3+, Hg2+ and Cr3+ are in the range of 9.40 × 10-10-1.86 × 10-9. More importantly, the xerogel of FSOF exhibits porous mesh structures, which could effect high-efficiency separation above metal ions from their aqueous solution, with adsorption percentages in the range 92.39-99.99%. In addition, by introducing metal ions into the FSOF, a series of metal ions coordinated supramolecular organic frameworks (MSOFs) were successfully constructed. Moreover, MSOFs show selective fluorescence "turn on" ultrasensitive detection CN- (LOD = 2.12 × 10-9) and H2PO4- (LOD = 1.78 × 10-9). This is a novel approach to construct SOFs through a tri-pillar[5]arene-based foldamer, and also provides a new way to achieve ultrasensitive detection and high-efficiency separation.
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Affiliation(s)
- Tai-Bao Wei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
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26
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Adam C, Faour L, Bonnin V, Breton T, Levillain E, Sallé M, Gautier C, Canevet D. Supramolecular chemistry of helical foldamers at the solid-liquid interface: self-assembled monolayers and anion recognition. Chem Commun (Camb) 2019; 55:8426-8429. [PMID: 31259345 DOI: 10.1039/c9cc03851e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The synthesis of a redox-active helical foldamer and its immobilization onto a gold electrode are described. These large molecular architectures are grafted in a reproducible manner and provide foldamer-based self-assembled monolayers displaying recognition properties.
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Affiliation(s)
- Catherine Adam
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Lara Faour
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Valérie Bonnin
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Tony Breton
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Eric Levillain
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Marc Sallé
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - Christelle Gautier
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
| | - David Canevet
- Laboratoire MOLTECH-Anjou, UMR CNRS 6200, UNIV Angers, SFR MATRIX, 2 Bd Lavoisier, 49045 Angers Cedex, France.
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27
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Merlet E, Moreno K, Tron A, McClenaghan N, Kauffmann B, Ferrand Y, Olivier C. Aromatic oligoamide foldamers as versatile scaffolds for induced circularly polarized luminescence at adjustable wavelengths. Chem Commun (Camb) 2019; 55:9825-9828. [PMID: 31360956 DOI: 10.1039/c9cc04697f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Quinoline oligoamide foldamers appended with non-chiral fluorophores and derivatized with a camphanyl chiral inducer display strong chiroptical properties at tunable wavelengths as proved by CD and CPL spectroscopies. Induced CPL activity with high luminescence dissymmetry factors was observed in the visible range at wavelengths specific to the fluorophores.
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Affiliation(s)
- Eric Merlet
- Univ. Bordeaux, CNRS, Bordeaux INP, CBMN, UMR 5248, F-33600, Pessac, France.
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28
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Malzkuhn S, Guo X, Häussinger D, Wenger OS. Electron Transfer across o-Phenylene Wires. J Phys Chem A 2018; 123:96-102. [PMID: 30592217 DOI: 10.1021/acs.jpca.8b11236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photoinduced electron transfer across rigid rod-like oligo- p-phenylenes has been thoroughly investigated in the past, but their o-connected counterparts are yet entirely unexplored in this regard. We report on three molecular dyads comprised of a triarylamine donor and a Ru(bpy)32+ (bpy =2,2'-bipyridine) acceptor connected covalently by 2 to 6 o-phenylene units. Pulsed excitation of the Ru(II) sensitizer at 532 nm leads to the rapid formation of oxidized triarylamine and reduced ruthenium complex via intramolecular electron transfer. The subsequent thermal reverse charge-shift reaction to reinstate the electronic ground-state occurs on a time scale of 120-220 ns in deaerated CH3CN at 25 °C. The conformational flexibility of the o-phenylene bridges causes multiexponential transient absorption kinetics for the photoinduced forward process, but the thermal reverse reaction produces single-exponential transient absorption decays. The key finding is that the flexible o-phenylene bridges permit rapid formation of photoproducts storing ca. 1.7 eV of energy with lifetimes on the order of hundreds of nanoseconds, similar to what is possible with rigid rod-like donor-acceptor compounds. Thus, the conformational flexibility of the o-phenylenes represents no disadvantage with regard to the photoproduct lifetimes, and this is relevant in the greater context of light-to-chemical energy conversion.
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Affiliation(s)
- Sabine Malzkuhn
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Xingwei Guo
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Daniel Häussinger
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Oliver S Wenger
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
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29
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Espinoza EM, Clark JA, Derr JB, Bao D, Georgieva B, Quina FH, Vullev VI. How Do Amides Affect the Electronic Properties of Pyrene? ACS OMEGA 2018; 3:12857-12867. [PMID: 31458010 PMCID: PMC6644773 DOI: 10.1021/acsomega.8b01581] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/24/2018] [Indexed: 05/12/2023]
Abstract
The electronic properties of amide linkers, which are intricate components of biomolecules, offer a wealth of unexplored possibilities. Herein, we demonstrate how the different modes of attaching an amide to a pyrene chromophore affect the electrochemical and optical properties of the chromophore. Thus, although they cause minimal spectral shifts, amide substituents can improve either the electron-accepting or electron-donating capabilities of pyrene. Specifically, inversion of the amide orientation shifts the reduction potentials by 200 mV. These trends indicate that, although amides affect to a similar extent the energies of the ground and singlet excited states of pyrene, the effects on the doublet states of its radical ions are distinctly different. This behavior reflects the unusually strong orientation dependence of the resonance effects of amide substituents, which should extend to amide substituents on other types of chromophores in general. These results represent an example where the Hammett sigma constants fail to predict substituent effects on electrochemical properties. On the other hand, Swain-Lupton parameters are found to be in good agreement with the observed trends. Examination of the frontier orbitals of the pyrene derivatives and their components reveals the underlying reason for the observed amide effects on the electronic properties of this polycyclic aromatic hydrocarbon and points to key molecular-design strategies for electronic and energy-conversion systems.
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Affiliation(s)
- Eli M. Espinoza
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
- Instituto
de Química, Universidade de São
Paulo, Avenida Lineu
Prestes 748, Cidade Universitária, São
Paulo 05508-000, Brazil
| | - John A. Clark
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
| | - James B. Derr
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
| | - Duoduo Bao
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
| | - Boriana Georgieva
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
| | - Frank H. Quina
- Instituto
de Química, Universidade de São
Paulo, Avenida Lineu
Prestes 748, Cidade Universitária, São
Paulo 05508-000, Brazil
- E-mail: (F.H.Q.)
| | - Valentine I. Vullev
- Department
of Chemistry, Department of Bioengineering, Department of Biochemistry, and Materials Science
and Engineering Program, University of California, Riverside, California 92521, United States
- E-mail: (V.I.V.)
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Bornhof AB, Bauzá A, Aster A, Pupier M, Frontera A, Vauthey E, Sakai N, Matile S. Synergistic Anion–(π)n–π Catalysis on π-Stacked Foldamers. J Am Chem Soc 2018; 140:4884-4892. [DOI: 10.1021/jacs.8b00809] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | - Antonio Bauzá
- Department de Química, Universitat de les Illes Balears, Carretera de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | | | | | - Antonio Frontera
- Department de Química, Universitat de les Illes Balears, Carretera de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
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