1
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Lago-Silva M, Fernández-Míguez M, Rodríguez R, Quiñoá E, Freire F. Stimuli-responsive synthetic helical polymers. Chem Soc Rev 2024; 53:793-852. [PMID: 38105704 DOI: 10.1039/d3cs00952a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Synthetic dynamic helical polymers (supramolecular and covalent) and foldamers share the helix as a structural motif. Although the materials are different, these systems also share many structural properties, such as helix induction or conformational communication mechanisms. The introduction of stimuli responsive building blocks or monomer repeating units in these materials triggers conformational or structural changes, due to the presence/absence of the external stimulus, which are transmitted to the helix resulting in different effects, such as assymetry amplification, helix inversion or even changes in the helical scaffold (elongation, J/H helical aggregates). In this review, we show through selected examples how different stimuli (e.g., temperature, solvents, cations, anions, redox, chiral additives, pH or light) can alter the helical structures of dynamic helical polymers (covalent and supramolecular) and foldamers acting on the conformational composition or molecular structure of their components, which is also transmitted to the macromolecular helical structure.
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Affiliation(s)
- María Lago-Silva
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Manuel Fernández-Míguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Félix Freire
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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2
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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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3
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McCann S, Roe WE, Agnew HE, Knipe PC. Non-Covalent Interactions Enforce Conformation in Switchable and Water-Soluble Diketopiperazine-Pyridine Foldamers. Angew Chem Int Ed Engl 2023; 62:e202307180. [PMID: 37414732 PMCID: PMC10952507 DOI: 10.1002/anie.202307180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/08/2023]
Abstract
To reach their potential as mimics of the dynamic molecules present in biological systems, foldamers must be designed to display stimulus-responsive behavior. Here we report such a foldamer architecture based on alternating pyridine-diketopiperazine linkers. Epimerization is conveniently prevented through a copper-catalyzed coupling protocol. The compounds' native unswitched conformation is first discovered in the solid and solution state. The foldamers can be solubilized in DMSO and pH 9.5 buffer, retaining conformational control to a large degree. Lastly, dynamic switching is demonstrated through treatment with acid, leading to behaviour we describe as stimulus-responsive sidechain reconfiguration.
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Affiliation(s)
- Sinead McCann
- School of Chemistry and Chemical EngineeringQueen's University BelfastDavid Keir Building, Stranmillis RoadBelfastBT9 5AGUK
| | - William E. Roe
- School of Chemistry and Chemical EngineeringQueen's University BelfastDavid Keir Building, Stranmillis RoadBelfastBT9 5AGUK
| | - Hannah E. Agnew
- School of Chemistry and Chemical EngineeringQueen's University BelfastDavid Keir Building, Stranmillis RoadBelfastBT9 5AGUK
| | - Peter C. Knipe
- School of Chemistry and Chemical EngineeringQueen's University BelfastDavid Keir Building, Stranmillis RoadBelfastBT9 5AGUK
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4
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Devkota GP, Carson WP, Hartley CS. Conformational Control of ortho-Phenylenes by Terminal Amides. J Org Chem 2023; 88:1331-1338. [PMID: 36650119 DOI: 10.1021/acs.joc.2c01858] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Control over the folding of oligomers, be it broad induction of a preferred helical handedness or subtle changes in the orientations of individual functional groups, is important for applications ranging from molecular recognition to long-range conformational communication. Here, we report a series of ortho-phenylene hexamers functionalized with achiral and chiral amides at their termini. NMR spectroscopy, taking advantage of 19F labeling, allows multiple conformers to be detected for each compound. In combination with CD spectroscopy and DFT calculations, specific geometries corresponding to each conformer have been identified and quantified. General conclusions about the effect of sterics and the amide linker on conformational behavior have been drawn, revealing some similarities to and key differences from previously reported imines. A model for twist sense control has been developed that is supported by computational models.
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Affiliation(s)
- Govinda Prasad Devkota
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - William P Carson
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - C Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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5
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Peddi S, Livieri JM, Vemuri GN, Hartley CS. Engineering Chiral Induction in Centrally Functionalized o-Phenylenes. J Org Chem 2023; 88:788-795. [PMID: 36602975 DOI: 10.1021/acs.joc.2c01870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Work on foldamers, nonbiological oligomers that mimic the hierarchical structure of biomacromolecules, continues to yield new architectures of ever increasing complexity. o-Phenylenes, a class of helical aromatic foldamers, are well-suited to this area because of their structural simplicity and the straightforward characterization of their folding in solution. However, control of structure requires, by definition, control over folding handedness. Control over o-phenylene twist sense is currently lacking. While chiral induction from groups at o-phenylene termini has been demonstrated, it would be useful to instead direct twisting from internal positions to leave the ends free. Here, we explore chiral induction in a series of o-phenylenes with chiral imides at their centers. Conformational behavior has been studied by nuclear magnetic resonance and circular dichroism spectroscopies and density functional theory calculations. Chiral induction in otherwise unfunctionalized o-phenylenes is generally poor. However, strategic functionalization of the helix surface with trifluoromethyl or methyl groups allows it to better interact with the imide groups, greatly increasing diastereomeric excesses. The sense of chiral induction is consistent with computational models that suggest that it primarily arises from a steric effect.
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Affiliation(s)
- Sumalatha Peddi
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Juliana M Livieri
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Gopi Nath Vemuri
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - C Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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6
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Maity D, Hamilton AD. The helical supramolecular assembly of oligopyridylamide foldamers in aqueous media can be guided by adenosine diphosphates. Chem Commun (Camb) 2021; 57:9192-9195. [PMID: 34519293 DOI: 10.1039/d1cc02704b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free and achiral tri-pyridylamide foldamer, DM 11, containing a critical naphthalimide side chain self-assembles in a left-handed helical manner in the presence of chiral adenosine phosphates, under physiological conditions. Surprisingly, a very high degree of helicity in the foldamer assemblies was observed with ADP compared to other nucleoside phosphates, including ATP.
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Affiliation(s)
- Debabrata Maity
- Department of Chemistry, New York University, New York, NY 10003, USA.
| | - Andrew D Hamilton
- Department of Chemistry, New York University, New York, NY 10003, USA.
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7
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Lee M, Kang SI, Song S, Kim H, Lee D. Sharp Turns and Fluorescent Repeats: Modular Construction and Shape-Dependent Electronic Properties of π-Conjugated Chain Molecules. Chempluschem 2021; 86:313-318. [PMID: 33620771 DOI: 10.1002/cplu.202000818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/05/2021] [Indexed: 11/07/2022]
Abstract
In search of the design rules for structural ordering of open-chain molecules, we have built a series of zig-zag shaped π-conjugated structures with ring-fused heteroaromatics as sharp turns and tolane-based linear fragments as light-emitting units. Using only a finite number of common building blocks, an efficient "double-elongation" strategy was implemented to construct a series of π-conjugated oligomers with precise length control (55-89 % yields). Our approach takes advantage of the modular nature of the bis(triazolo)benzene synthesis and the masked reactivity of the nitro group. A combination of photophysical and DFT computational studies revealed that the bis(triazolo)benzene-tolane repeat units behave as electronically decoupled light-absorbing/emitting units (λmax,em = 408-422 nm; ΦF = 20-25 % in THF). Such context-independent photophysical properties promise their potential applications in chemical sensing and switching.
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Affiliation(s)
- Milim Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Suk-Il Kang
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sungmin Song
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hongsik Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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8
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Abstract
Using anions to induce molecular structure is a rapidly growing area of dynamic and switchable supramolecular chemistry. The emphasis of this review is on helical anion foldamers in solution, and many of the beautiful complexes described herein are accentuated by their crystal structures. Anion foldamers are defined as single- or multistrand complexes-often helical-that incorporate one or more anions. The review begins by discussing foldamer structure and nomenclature and follows with discourse on the anions which are employed. Recent advances in functional foldamers that bind a single anion are examined, including: induced chirality, stimuli-responsive dynamics, fluorescence changes, organocatalysis, anion transport, and halogen bonding. The review then inspects multianion foldamers, and this section is organized by the number of strands within the foldamer-from single- to triple-strand foldamers. Finally, the review is punctuated by recent hydrogen- and halogen-bonding triple-strand anion foldamers.
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Affiliation(s)
- Eric A John
- Department of Chemistry and Biochemistry, University of Montana, 32 Campus Drive, Missoula, Montana 59812, United States
| | - Casey J Massena
- Department of Chemistry and Biochemistry, University of Montana, 32 Campus Drive, Missoula, Montana 59812, United States
| | - Orion B Berryman
- Department of Chemistry and Biochemistry, University of Montana, 32 Campus Drive, Missoula, Montana 59812, United States
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9
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Parks FC, Liu Y, Debnath S, Stutsman SR, Raghavachari K, Flood AH. Allosteric Control of Photofoldamers for Selecting between Anion Regulation and Double-to-Single Helix Switching. J Am Chem Soc 2018; 140:17711-17723. [DOI: 10.1021/jacs.8b10538] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fred C. Parks
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Yun Liu
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Sibali Debnath
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Sydney R. Stutsman
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Krishnan Raghavachari
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Amar H. Flood
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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10
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Vemuri GN, Pandian RR, Spinello BJ, Stopler EB, Kinney ZJ, Hartley CS. Twist sense control in terminally functionalized ortho-phenylenes. Chem Sci 2018; 9:8260-8270. [PMID: 30542575 PMCID: PMC6240895 DOI: 10.1039/c8sc02821d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/05/2018] [Indexed: 01/19/2023] Open
Abstract
Chiral groups induce opposite twist senses of o-phenylene helices depending on their positions in dynamic mixtures.
Many abiotic foldamers are based on achiral repeat units but adopt chiral geometries, especially helices. In these systems, there is no inherent preference for one handedness of the fold; however, it is well-established that the point chirality of substituents can be communicated to the helix. This capability represents a basic level of control over folding that is necessary for applications in molecular recognition and in the assembly of higher-order structures. The ortho-phenylenes are a structurally simple class of aromatic foldamers that fold into helices driven by arene–arene stacking interactions. Although their folding is now reasonably well-understood, access to o-phenylenes enriched in one twist sense has been limited to resolution, yielding conformationally dynamic samples that racemize over the course of minutes to hours. Here, we report a detailed structure–property study of chiral induction from o-phenylene termini using a combination of NMR spectroscopy, CD spectroscopy, and computational chemistry. We uncover mechanistic details of chiral induction and show that the same substituents can give effective twist sense control in opposite directions in mixtures of interconverting conformers; that is, they are “ambidextrous”. This behavior should be general and can be rationalized using a simple model based on sterics, noting that arene–arene stacking is, to a first approximation, unaffected by flipping either partner. We demonstrate control over this mechanism by showing that chiral groups can be chosen such that they both favor one orientation and provide effective chiral induction.
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Affiliation(s)
- Gopi Nath Vemuri
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - Rathiesh R Pandian
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - Brian J Spinello
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - Erika B Stopler
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - Zacharias J Kinney
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - C Scott Hartley
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
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11
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Kinney ZJ, Hartley CS. Linker-Directed Assembly of Twisted ortho-Phenylene-Based Macrocycles. Org Lett 2018; 20:3327-3331. [PMID: 29763333 DOI: 10.1021/acs.orglett.8b01237] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
o-Phenylene tetramers have been coassembled with linkers into macrocycles through imine condensation. Variation of linker connectivity and length allows both [1 + 1] and [2 + 2] macrocycles to be obtained, complementing (previously reported) [3 + 3] macrocycles. For the [1 + 1] macrocycles, linker length has a clear effect on o-phenylene geometry and macrocycle stability. For the [2 + 2] macrocycles, both homo- and heterochiral configurations are observed, suggesting limited communication of helix handedness in these systems.
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Affiliation(s)
- Zacharias J Kinney
- Department of Chemistry & Biochemistry , Miami University , Oxford , Ohio 45056 , United States
| | - C Scott Hartley
- Department of Chemistry & Biochemistry , Miami University , Oxford , Ohio 45056 , United States
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12
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Diaferia C, Balasco N, Sibillano T, Giannini C, Vitagliano L, Morelli G, Accardo A. Structural Characterization of Self-Assembled Tetra-Tryptophan Based Nanostructures: Variations on a Common Theme. Chemphyschem 2018. [PMID: 29542851 DOI: 10.1002/cphc.201800026] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Over the years, a large number of multidisciplinary investigations has unveiled that the self-assembly of short peptides and even of individual amino acids can generate a variety of different biomaterials. In this framework, we have recently reported that polyethylene glycol (PEG) conjugates of short homopeptides, containing aromatic amino acids such as phenylalanine (Phe, F) and naphthylalanine (Nal), are able to form elongated fibrillary aggregates having interesting chemical and physical properties. We here extend these analyses characterizing the self-assembling propensity of PEG6 -W4, a PEG adduct of the tetra-tryptophan (W4) sequence. A comprehensive structural characterization of PEG6 -W4 was obtained, both in solution and at the solid state, through the combination of spectroscopic, microscopic, X-ray scattering and computational techniques. Collectively, these studies demonstrate that this peptide is able to self-assemble in fibrillary networks characterized by a cross β-structure spine. The present findings clearly demonstrate that aromatic residues display a general propensity to induce self-aggregation phenomenon, despite the significant differences in the physicochemical properties of their side chains.
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Affiliation(s)
- Carlo Diaferia
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", Via Mezzocannone 16, 80134-, Naples, Italy
| | - Nicole Balasco
- Institute of Biostructures and Bioimaging (IBB), CNR, via Mezzocannone 16, 80134, Naples (Italy
| | - Teresa Sibillano
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126, Bari, Italy
| | - Cinzia Giannini
- Institute of Crystallography (IC), CNR, Via Amendola 122, 70126, Bari, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging (IBB), CNR, via Mezzocannone 16, 80134, Naples (Italy
| | - Giancarlo Morelli
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", Via Mezzocannone 16, 80134-, Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", Via Mezzocannone 16, 80134-, Naples, Italy
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13
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Resa S, Miguel D, Guisán-Ceinos S, Mazzeo G, Choquesillo-Lazarte D, Abbate S, Crovetto L, Cárdenas DJ, Carreño MC, Ribagorda M, Longhi G, Mota AJ, Álvarez de Cienfuegos L, Cuerva JM. Sulfoxide-Induced Homochiral Folding of ortho
-Phenylene Ethynylenes (o
-OPEs) by Silver(I) Templating: Structure and Chiroptical Properties. Chemistry 2018; 24:2653-2662. [DOI: 10.1002/chem.201704897] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | - Delia Miguel
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giuseppe Mazzeo
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos; Instituto Andaluz de Ciencias de la Tierra, CSIC-UGR; Armilla, Granada Spain
| | - Sergio Abbate
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Luis Crovetto
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - María Ribagorda
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giovanna Longhi
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Antonio J. Mota
- Department of Inorganic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
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14
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Yang L, Wang Y, Che Y, Jiang H. An aryl-triazole foldamer containing a 1,8-naphthalimide fluorescent motif for monitoring and enhancing the anion-induced folding. Org Biomol Chem 2017; 15:7747-7752. [DOI: 10.1039/c7ob01736g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A 1,8-naphthalimide fluorescent motif was found to facilitate folding and to largely enhance halogen anion binding for an aryl-triazole foldamer.
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Affiliation(s)
- Ling Yang
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Ying Wang
- College of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Yanke Che
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Hua Jiang
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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15
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Haridas V, Sadanandan S, Dhawan S, Mishra R, Jain I, Goel G, Hu Y, Patel S. Synthetic minimalistic tryptophan zippers as a chiroptical switch. Org Biomol Chem 2017; 15:1661-1669. [DOI: 10.1039/c6ob02617f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Supramolecular helices with left and right handed chirality were designed and synthesized based on l-tryptophan that undergo helical inversion upon addition of H2PO4−.
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Affiliation(s)
- V. Haridas
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Sandhya Sadanandan
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Sameer Dhawan
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Rituraj Mishra
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Ishani Jain
- Department of Chemical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Gaurav Goel
- Department of Chemical Engineering
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Yuan Hu
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark
- USA
| | - Sandeep Patel
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark
- USA
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16
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Helttunen K, Annala R, Suhonen A, Nauha E, Linnanto J, Nissinen M. Supramolecular chirality and symmetry breaking of fluoride complexes of achiral foldamers. CrystEngComm 2017. [DOI: 10.1039/c7ce01109a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluoride binding of achiral oligoamide foldamers produces polar and chiral crystal structures and induces exceptional symmetry breaking of the bulk sample.
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Affiliation(s)
- Kaisa Helttunen
- Department of Chemistry
- Nanoscience Center
- University of Jyvaskyla
- FI-40014 University of Jyvaskyla
- Finland
| | - Riia Annala
- Department of Chemistry
- Nanoscience Center
- University of Jyvaskyla
- FI-40014 University of Jyvaskyla
- Finland
| | - Aku Suhonen
- Department of Chemistry
- Nanoscience Center
- University of Jyvaskyla
- FI-40014 University of Jyvaskyla
- Finland
| | - Elisa Nauha
- College of Science
- Joseph Banks Laboratories
- University of Lincoln
- Lincoln
- UK
| | - Juha Linnanto
- Institute of Physics
- University of Tartu
- 50411 Tartu
- Estonia
| | - Maija Nissinen
- Department of Chemistry
- Nanoscience Center
- University of Jyvaskyla
- FI-40014 University of Jyvaskyla
- Finland
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17
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Wang Y, Zhao W, Bie F, Wu L, Li X, Jiang H. Ruthenium(II) Complexes of Aryl Triazole Foldamers as Receptors for Anions. Chemistry 2016; 22:5233-42. [PMID: 26918407 DOI: 10.1002/chem.201504910] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Indexed: 12/15/2022]
Abstract
Ruthenium(II) complexes of oligo(bipyridine-phenyl triazole)s were synthesized as receptors for anions. The receptors, which are partially preorganized through metal-ligand interactions, can fold into a helical conformation to bind chloride, bromide, iodide, or nitrate anions in their inner cavities in acetone or competitive H-bonding media such as 5% water in acetone and DMSO. The short oligomer 1 can sandwich the studied anions with high affinity in acetone. Addition of 5% water to acetone results in overall decreases in the binding strength due to the binding competition from water, but does not change the basic binding mode. The highly competitive H-bonding solvent DMSO causes the receptor-anion interactions to become even weaker. However, in DMSO, the short receptor 1 is still able to bind the halide anions with moderate affinities in a 1:1 stoichiometry, whereas the longer oligomer 2 forms double-strand helices with an anion wrapped inside for all anions investigated so far.
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Affiliation(s)
- Ying Wang
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China.
| | - Wei Zhao
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China.,Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Fusheng Bie
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China.,Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Le Wu
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China
| | - Xichen Li
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China
| | - Hua Jiang
- Key Laboratory of Theoretical and Computational Photochemistry and Key Laboratory of Radiopharmaceuticals of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, P.R. China. .,Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.
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18
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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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19
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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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20
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Ponnuvel K, Santhiya K, Padmini V. Curcumin based chemosensor for selective detection of fluoride and cyanide anions in aqueous media. Photochem Photobiol Sci 2016; 15:1536-1543. [DOI: 10.1039/c6pp00254d] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The conjugate N,N-dimethyl curcumin analogue fluorophore dye 1 has been synthesized and its performance as a sensor was demonstrated.
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Affiliation(s)
- Kandasamy Ponnuvel
- Department of Organic Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
| | - Kuppusamy Santhiya
- Department of Organic Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
| | - Vediappen Padmini
- Department of Organic Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai-625021
- India
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21
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Li Y, Dutta T, Gerasimchuk N, Wu S, Shetye K, Jin L, Wang R, Zhu DM, Peng Z. Conjugated foldamers with unusually high space-charge-limited current hole mobilities. ACS APPLIED MATERIALS & INTERFACES 2015; 7:9372-9384. [PMID: 25915005 DOI: 10.1021/acsami.5b01676] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Charge carrier mobility and its optimization play a critical role in the development of cutting-edge organic electronic and optoelectronic devices. Even though space-charge-limited current (SCLC) hole mobilities as high as 1.4 cm(2) V(-1) s(-1) have been reported for microscopically sized highly ordered liquid-crystalline conjugated small molecules, the SCLC hole mobility of device-sized thin films of conjugated polymers is still much lower, ranging from 10(-6) to 10(-3) cm(2) V(-1) s(-1). Herein, we report the synthesis, characterizations, and thin-film SCLC mobility of three discotic conjugated polymers, INDT-TT, INDT-BT, and INDT-NDT. Optical studies indicate that polymer INDT-NDT adopts a folded conformation in solutions of good or poor solvents, whereas polymer INDT-TT stays as random monomeric chains in good solvents and interchain aggregates in poor solvents. INDT-BT polymer chains, however, stay as foldamers in dilute solutions of good solvents but interchain aggregates in concentrated solutions or poor solvents. Circular dichroism spectroscopy provides clear evidence for the helical folding of INDT-NDT in solutions. Thin films spin-coated from 1,2-dichlorobenzene solutions of the polymers show SCLC hole mobility of 2.20 × 10(-6), 8.79 × 10(-5), and 2.77 × 10(-2) cm(2) V(-1) s(-1) for INDT-TT, INDT-BT, and INDT-NDT, respectively. HRTEM and powder XRD measurements show that INDT-NDT pristine thin films contain nanocrystalline domains, whereas the INDT-TT and INDT-BT films are amorphous. Thin films of INDT-NDT:PC71BM blends show increased crystallinity and further improved SCLC hole mobility up to 1.29 × 10(-1) cm(2) V(-1) s(-1), one of the highest SCLC mobility values ever recorded on solution-processed organic semiconducting thin films. The persistent folding conformation of INDT-NDT is believed to be responsible for the high crystallinity of its thin films and its high SCLC mobilities.
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Affiliation(s)
| | | | - Nikolay Gerasimchuk
- §Department of Chemistry, Missouri State University, Springfield, Missouri 65897, United States
| | - Shijie Wu
- ∥Nano Scale Sciences Division, Keysight Technologies, Inc., Santa Clara, California 95051, United States
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22
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Knipe PC, Thompson S, Hamilton AD. Ion-mediated conformational switches. Chem Sci 2015; 6:1630-1639. [PMID: 28694943 PMCID: PMC5482205 DOI: 10.1039/c4sc03525a] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 11/19/2014] [Indexed: 01/02/2023] Open
Abstract
Molecular switches are ubiquitous in Nature and provide the basis of many forms of transport and signalling. Single synthetic molecules that change conformation, and thus function, reversibly in a stimulus-dependent manner are of great interest not only to chemists but society in general; myriad applications exist in storage, display, sensing and medicine. Here we describe recent developments in the area of ion-mediated switching.
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Affiliation(s)
- Peter C Knipe
- Department of Chemistry , Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , UK . ; ; Tel: +44 (0)1865 275978
| | - Sam Thompson
- Department of Chemistry , Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , UK . ; ; Tel: +44 (0)1865 275978
| | - Andrew D Hamilton
- Department of Chemistry , Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , UK . ; ; Tel: +44 (0)1865 275978
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23
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Jeyanthi D, Iniya M, Krishnaveni K, Chellappa D. Novel indole based dual responsive "turn-on" chemosensor for fluoride ion detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1269-1274. [PMID: 25456669 DOI: 10.1016/j.saa.2014.10.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 07/25/2014] [Accepted: 10/08/2014] [Indexed: 06/04/2023]
Abstract
An efficient new dual channel chemosensor 2,3-bis((E)-(1H-indole-3-yl)methyleneamino)maleonitrile (DN) which exhibits selective sensing of F(-) ions in DMSO, was synthesized by a facile one step condensation reaction of indole-3-carboxaldehyde with diaminomaleonitrile. The probe DN was characterized by elemental analysis, (1)H, (13)C-NMR, ESI-MS and IR spectral techniques. Upon addition of F(-), DN induces remarkable changes in both absorption and fluorescence spectra on the basis of charge transfer mechanism. The receptor DN serves for highly selective, sensitive detection of F(-) without the interference of other relevant anions. The Job's plot analysis indicates the binding stoichiometry to be 1:1 (host/guest).
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Affiliation(s)
- Dharmaraj Jeyanthi
- School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu 625021, India
| | - Murugan Iniya
- School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu 625021, India
| | | | - Duraisamy Chellappa
- School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu 625021, India.
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24
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Jain N, Bedekar AV. Lipase catalyzed desymmetrization of roof shape cis-11,12-bis(hydroxymethyl)-9,10-dihydro-9,10-ethanoanthracene. RSC Adv 2015. [DOI: 10.1039/c5ra11626k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biocatalyzed desymmetrization of roof shape meso cis-11,12-bis(hydroxymethyl)-9,10-dihydro-9,10-ethanoanthracene has been achieved.
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Affiliation(s)
- Nilesh Jain
- Department of Chemistry
- Faculty of Science
- M.S. University of Baroda
- Vadodara 390 002
- India
| | - Ashutosh V. Bedekar
- Department of Chemistry
- Faculty of Science
- M.S. University of Baroda
- Vadodara 390 002
- India
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25
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Zhan TG, Zhou TY, Qi QY, Wu J, Li GY, Zhao X. The construction of supramolecular polymers through anion bridging: from frustrated hydrogen-bonding networks to well-ordered linear arrays. Polym Chem 2015. [DOI: 10.1039/c5py01284h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The construction of supramolecular polymers has been realized by converting random hydrogen-bonding networks into well-ordered linear hydrogen-bonding arrays through an anion-bridging strategy.
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Affiliation(s)
- Tian-Guang Zhan
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Tian-You Zhou
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Qiao-Yan Qi
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Jian Wu
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Guang-Yu Li
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Xin Zhao
- Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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26
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Sureshbabu B, Venkatachalam R, Sankararaman S. Substituent effect on the formation of helical to layered hydrogen bond networks in hydroxyl and carboxyl substituted 1-aryl-1H-1,2,3-triazoles. CrystEngComm 2014. [DOI: 10.1039/c4ce00738g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interplay of twisted conformations and O–H⋯N and O–H⋯O hydrogen bond synthons on supramolecular chirality in OH and COOH substituted 1-aryl-1H-1,2,3-triazoles.
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Affiliation(s)
- Bemineni Sureshbabu
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036, India
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27
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Maeda H. Supramolecular Chemistry of Pyrrole-Based π-Conjugated Molecules. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130219] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Bie F, Wang Y, Shang J, Gallagher NM, Jiang H. Synergistic Recognition of Halide Anions and Saccharides by Oligohydrazide Foldamers. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300817] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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30
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Suk JM, Kim DA, Jeong KS. Helicity Control of an Indolocarbazole Foldamer by Chiral Organic Anions. Org Lett 2012; 14:5018-21. [DOI: 10.1021/ol3022148] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jae-min Suk
- Department of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Dan A Kim
- Department of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul 120-749, South Korea
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31
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Abstract
A number of indolocarbazole-based anion receptors were prepared and their anion-binding behaviors were characterized in solution and in the solid state. First, chain-length-dependent binding affinities of chloride ion were revealed using a series of indolocarbazoles that consisted of one to four indolocarbazole units. The binding affinities were steadily enhanced from monomer to dimer, then to trimer by Gibb’s free energy (–∆∆G) = 2.4 ± 0.1 kcal/mol, and then nearly saturated. Second, a water-soluble trimer folded to generate an internal helical cavity with six convergent NHs, wherein small halides bound in water in the order of Cl– (65 M–1) > F– (46 M–1), and Br– (19 M–1). Third, X-ray crystal structures clearly proved helical folding of a trimer in the presence of sulfate ion, in which left- and right-handed helices stacked alternatively. It was also shown that the selectivity of anion binding could be varied by the modification of the spacer groups connecting indolocarbazole units. Finally, we prepared chiral indolocabazole dimers that adopted helical structures by intramolecular hydrogen bonds and displayed complete inversion of the helical sense upon anion binding. The dimers gave characteristic optical readouts in a reversible manner according to chemical stimuli, thus functioning as chirooptical molecular switches.
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32
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Wu B, Jia C, Wang X, Li S, Huang X, Yang XJ. Chloride Coordination by Oligoureas: From Mononuclear Crescents to Dinuclear Foldamers. Org Lett 2012; 14:684-7. [DOI: 10.1021/ol2031153] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
| | - Chuandong Jia
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
| | - Xiaolei Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
| | - Shaoguang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
| | - Xiaojuan Huang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
| | - Xiao-Juan Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710069, China, and State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
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33
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Wei M, Wu B, Zhao L, Zhang H, Li S, Zhao Y, Yang XJ. A bis-bisurea receptor with the R,R-cyclohexane-1,2-diamino spacer for phosphate and sulfate ions. Org Biomol Chem 2012; 10:8758-61. [DOI: 10.1039/c2ob26591e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Zhao H, Ong WQ, Zhou F, Fang X, Chen X, Li SFY, Su H, Cho NJ, Zeng H. Chiral crystallization of aromatic helical foldamers via complementarities in shape and end functionalities. Chem Sci 2012. [DOI: 10.1039/c2sc20219k] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Opsitnick EA, Jiang X, Hollenbeck AN, Lee D. Hydrogen-Bond-Assisted Helical Folding of Propeller-Shaped Molecules: Effects of Extended π-Conjugation on Chiral Selection, Conformational Stability, and Exciton Coupling. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101351] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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Synthesis, crystal structure, and different local conformations of pyridine–imide oligomers. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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37
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Shi ZM, Chen SG, Zhao X, Jiang XK, Li ZT. meta-Substituted benzamide oligomers that complex mono-, di- and tricarboxylates: folding-induced selectivity and chirality. Org Biomol Chem 2011; 9:8122-9. [PMID: 22020873 DOI: 10.1039/c1ob06026k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
meta-Substituted arylamide trimer, pentamer and heptamer have been prepared from simple benzene-1,3-diamine, benzene-1,3-dicarboxylic acid, and 3-aminobenzoic acid units. 2D NOESY (1)H NMR experiments reveal that these flexible oligomers form folded conformations to complex di- and tricarboxylate anions of varying sizes and shapes in DMSO of high polarity, which is driven by multiple intermolecular N-H···O=C and C-H···O=C hydrogen-bonds between the amide and aromatic hydrogens of the oligomers and the carboxylate oxygens of the anions. Generally, tricarboxylate anions display an increased binding affinity compared with the dicarboxylate anions and the complexes formed by 1,3-benzenedicarboxylate anion are more stable than those formed by 1,2- or 1,4-benzenedicarboxylate anions. Circular dichroism experiments show that chiral glutamic acid dianion can induce the oligomers to produce chiral bias, leading to the formation of chiral supramolecular complexes.
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Affiliation(s)
- Zhu-Ming Shi
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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38
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39
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Suk JM, Jeong KS. Modulation of Binding Affinities between Foldamer-Based Anion Receptors and Chloride Ion. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.2891] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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40
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Suk JM, Naidu VR, Liu X, Lah MS, Jeong KS. A foldamer-based chiroptical molecular switch that displays complete inversion of the helical sense upon anion binding. J Am Chem Soc 2011; 133:13938-41. [PMID: 21848269 DOI: 10.1021/ja206546b] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chiral indolocarbazole dimers fold into a helical conformation by virtue of intramolecular hydrogen bonds, as demonstrated by (1)H NMR and CD spectra and optical rotations. In particular, the optical properties of the dimers were found to be extremely sensitive to the nature of the solvent, depending on whether they are folded or not. The helical sense of the dimers can be reversibly switched by binding sulfate ion, which gives rise to complete inversion of the CD spectra. The binding mode and absolute stereochemistry of the sulfate complexes was unequivocally determined by single-crystal X-ray structures, which are all consistent with the CD and (1)H NMR spectra in solution.
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Affiliation(s)
- Jae-min Suk
- Department of Chemistry, Yonsei University, Seoul, Korea
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41
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Hydrogen-bonded helices in 2-aminothiazole derivatives: generation of chiral crystals from small achiral molecules. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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42
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Dong Z, Plampin JN, Yap GPA, Fox JM. Minimalist end groups for control of absolute helicity in salen- and salophen-based metallofoldamers. Org Lett 2010; 12:4002-5. [PMID: 20795709 DOI: 10.1021/ol101583v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(S)-1-Methylindan end groups are effective controllers of absolute helicity in Ni-salen- and Ni-salophen-based foldamers derived from (R,R)-trans-1,2-cyclohexanediamine and 1,2-phenylenediamine, respectively. Evidence for the helicity of the described complexes was provided through X-ray crystallography and study of chiroptical properties in solution. The chiral end groups control the absolute sense of helicity for the salen complexes, even in a case where the helical bias of the end group is mismatched relative to that of the internal diamine.
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Affiliation(s)
- Zhenzhen Dong
- Brown Laboratories, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Haketa Y, Maeda H. From Helix to Macrocycle: Anion-Driven Conformation Control of π-Conjugated Acyclic Oligopyrroles. Chemistry 2010; 17:1485-92. [DOI: 10.1002/chem.201002748] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Indexed: 11/11/2022]
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Halide‐Guided Oligo(aryl‐triazole‐amide)s Foldamers: Receptors for Multiple Halide Ions. Chemistry 2010; 17:613-9. [DOI: 10.1002/chem.201001560] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Indexed: 02/05/2023]
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Abstract
This critical review covers advances in anion complexation in the year 2008 and 2009. The review discusses anion receptors that employ hydrogen bond donors (both NH and CH), electrostatic interactions, Lewis acidic centres and combinations of these three types of binding interaction to complex anions. Additionally nanotechnological approaches to anion sensing in aqueous solution, lipid bilayer transporters and recent work on the use of anions to drive conformational change are highlighted (130 references).
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Affiliation(s)
- Philip A Gale
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK.
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Lee GW, Kim NK, Jeong KS. Synthesis of Biindole−Diazo Conjugates as a Colorimetric Anion Receptor. Org Lett 2010; 12:2634-7. [DOI: 10.1021/ol100830b] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gang Woo Lee
- Center of Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Nam-Kyun Kim
- Center of Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Kyu-Sung Jeong
- Center of Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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Ni BB, Yan Q, Ma Y, Zhao D. Recent advances in arylene ethynylene folding systems: Toward functioning. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.02.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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48
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Wang T, Yan XP. Pyrazino[2.3-g]quinoxaline-Bridged Indole-Based Building Blocks: Design, Synthesis, Anion-Binding Properties, and Phosphate-Directed Assembly in the Solid State. Chemistry 2010; 16:4639-49. [DOI: 10.1002/chem.200903188] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Indexed: 11/08/2022]
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50
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Yan Y, Qin B, Ren C, Chen X, Yip YK, Ye R, Zhang D, Su H, Zeng H. Synthesis, Structural Investigations, Hydrogen−Deuterium Exchange Studies, and Molecular Modeling of Conformationally Stablilized Aromatic Oligoamides. J Am Chem Soc 2010; 132:5869-79. [DOI: 10.1021/ja100579z] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan Yan
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Bo Qin
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Changliang Ren
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Xiuying Chen
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Yeow Kwan Yip
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Ruijuan Ye
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Dawei Zhang
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Haibin Su
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Huaqiang Zeng
- Department of Chemistry and MedChem Programme, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Department of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, and Department of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
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