1
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Wang Y, Zhang X, Huang CB, Hu L, Wang XQ, Wang W, Yang HB. Inducing and Switching the Handedness of Polyacetylenes with Topologically Chiral [2]Catenane Pendants. Angew Chem Int Ed Engl 2024; 63:e202408271. [PMID: 38837513 DOI: 10.1002/anie.202408271] [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: 04/30/2024] [Revised: 06/04/2024] [Accepted: 06/04/2024] [Indexed: 06/07/2024]
Abstract
To explore the chirality induction and switching of topological chirality, poly[2]catenanes composed of helical poly(phenylacetylenes) (PPAs) main chain and topologically chiral [2]catenane pendants are described for the first time. These poly[2]catenanes with optically active [2]catenanes on side chains were synthesized by polymerization of enantiomerically pure topologically chiral [2]catenanes with ethynyl polymerization site and/or point chiral moiety. The chirality information of [2]catenane pendants was successfully transferred to the main chain of polyene backbones, leading to preferred-handed helical conformations, while the introduction of point chiral units has negligible effect on the overall helices. More interestingly, attributed to unique dynamic feature of the [2]catenane pendants, these polymers revealed dynamic response behaviors to solvents, temperature, and sodium ions, resulting in the fully reversible switching on/off of the chirality induction. This work provides not only new design strategy for novel chiroptical switches with topologically chiral molecules but also novel platforms for the development of smart chiral materials.
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Affiliation(s)
- Yu Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xin Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Chang-Bo Huang
- Coatings Applied Research Asia Pacific, BASF Advanced Chemicals Co., Ltd., Shanghai, 200137, China
| | - Lianrui Hu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xu-Qing Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Wei Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Hai-Bo Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular and Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Shanghai Center of Brain-inspired Intelligent Materials and Devices, East China Normal University, Shanghai, 200241, China
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2
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Martínez-Parra JM, Gómez-Ojea R, Daudey GA, Calvelo M, Fernández-Caro H, Montenegro J, Bergueiro J. Exo-chirality of the α-helix. Nat Commun 2024; 15:6987. [PMID: 39143054 PMCID: PMC11325010 DOI: 10.1038/s41467-024-51072-8] [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: 06/08/2024] [Accepted: 07/30/2024] [Indexed: 08/16/2024] Open
Abstract
The structure of helical polymers is dictated by the molecular chirality of their monomer units. Particularly, macromolecular helices with monomer sequence control have the potential to generate chiral topologies. In α-helical folded peptides, the sequential repetition of amino acids generates a chiral layer defined by the amino acid side chains projected outside the amide backbone. Despite being closely related to peptides' structural and functional properties, to the best of our knowledge, a general exo-helical symmetry model has not been yet described for the α-helix. Here, we perform the theoretical, computational, and spectroscopic elucidation of the α-helix principal exo-helical topologies. Non-canonical labeled amino acids are employed to spectroscopically characterize the different exo-helical topologies in solution, which precisely match the theorical prediction. Backbone-to-chromophore distance also shows the expected impact in the exo-helices' geometry and spectroscopic fingerprint. Theoretical prediction and spectroscopic validation of this exo-helical topological model provides robust experimental evidence of the chiral potential on the surface of helical peptides and outlines an entirely new structural scenario for the α-helix.
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Affiliation(s)
- Jose M Martínez-Parra
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain
| | - Rebeca Gómez-Ojea
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain
| | - Geert A Daudey
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain
| | - Martin Calvelo
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain
| | - Hector Fernández-Caro
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain
| | - Javier Montenegro
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain.
| | - Julian Bergueiro
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15705, Santiago de Compostela, Spain.
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3
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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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4
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Ren L, Lu X, Li W, Yan J, Whittaker AK, Zhang A. Thermoresponsive Helical Dendronized Poly(phenylacetylene)s: Remarkable Stabilization of Their Helicity via Photo-Dimerization of the Dendritic Pendants. J Am Chem Soc 2023. [PMID: 37922243 DOI: 10.1021/jacs.3c09333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
Dynamic helical polymers can change their helicity according to external stimuli due to the low helix-inversion barriers, while helicity stabilization for polymers is important for applications in chiral recognition or chiral separations. Here, we present a convenient methodology to stabilize dynamic helical conformations of polymers through intramolecular cross-linking. Thermoresponsive dendronized poly(phenylacetylene)s (PPAs) carrying 3-fold dendritic oligoethylene glycol pendants containing cinnamate moieties were synthesized. These polymers exhibit typical features of dynamic helical structures in different solvents, that is, racemic contracted conformations in less polar organic solvents and predominantly one-handed stretched helical conformations in highly polar solvents. This dynamic helicity can be enhanced through selective solvation by increasing the polarity of the organic solvents or simply via their thermally mediated dehydration in water. However, through photocycloaddition of the cinnamate moieties between the neighboring pendants via UV irradiation, these dendronized PPAs adopt stable helical conformations either below or above their phase transition temperatures in water, and their helical conformations can even be retained in less polar organic solvents. Spectroscopic and atomic force microscopy measurements demonstrate that photocycloaddition between the cinnamate moieties occurs on the individual molecular level, and this is found to be helpful in restraining the photodegradation of the PPA backbones. Molecular dynamics simulations reveal that the spatial orientation of the pendants along the rigid polyene backbone is crucial for the photodimerization of cinnamates within one helix pitch.
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Affiliation(s)
- Liangxuan Ren
- International Joint Laboratory of Biomimetic and Smart Polymers, School of Materials Science & Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Xueting Lu
- International Joint Laboratory of Biomimetic and Smart Polymers, School of Materials Science & Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Wen Li
- International Joint Laboratory of Biomimetic and Smart Polymers, School of Materials Science & Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Jiatao Yan
- International Joint Laboratory of Biomimetic and Smart Polymers, School of Materials Science & Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
- ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Afang Zhang
- International Joint Laboratory of Biomimetic and Smart Polymers, School of Materials Science & Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, China
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5
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Rey-Tarrío F, Quiñoá E, Fernández G, Freire F. Multi-chiral materials comprising metallosupramolecular and covalent helical polymers containing five axial motifs within a helix. Nat Commun 2023; 14:3348. [PMID: 37291098 DOI: 10.1038/s41467-023-39014-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023] Open
Abstract
Supramolecular and covalent polymers share multiple structural effects such as communication mechanisms among monomer repeating units, which are related to their axial helical structure. Herein, a unique multi-helical material combining information from both metallosupramolecular and covalent helical polymers is presented. In this system, the helical structure described by the poly(acetylene) (PA) backbone (cis-cisoidal, cis-transoidal) guides the pendant groups in a fashion where a tilting degree emerges between a pendant and the adjacent ones. As a result, a multi-chiral material is formed comprising four or five axial motifs when the polyene skeleton adopts either a cis-transoidal or cis-cisoidal configuration: the two coaxial helices-internal and external-and the two or three chiral axial motifs described by the bispyridyldichlorido PtII complex array. These results show that complex multi-chiral materials can be obtained by polymerizing appropriate monomers that combine both point chirality and the ability to generate chiral supramolecular assemblies.
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Affiliation(s)
- Francisco Rey-Tarrío
- Research Center in Biological Chemistry and Molecular Materials (CiQUS), Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Emilio Quiñoá
- Research Center in Biological Chemistry and Molecular Materials (CiQUS), Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
| | - Gustavo Fernández
- University of Münster, Institute of Organic Chemistry, Corrensstraße 36, 48149, Münster, Germany.
| | - Félix Freire
- Research Center in Biological Chemistry and Molecular Materials (CiQUS), Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain.
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6
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Liu Y, Wu Y, Luo Z, Li M. Designing supramolecular self-assembly nanomaterials as stimuli-responsive drug delivery platforms for cancer therapy. iScience 2023; 26:106279. [PMID: 36936787 PMCID: PMC10014307 DOI: 10.1016/j.isci.2023.106279] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
Stimuli-responsive nanomaterials have attracted substantial interest in cancer therapy, as they hold promise to deliver anticancer agents to tumor sites in a precise and on-demand manner. Interestingly, supramolecular chemistry is a burgeoning discipline that entails the reversible bonding between components at the molecular and nanoscale levels, and the recent advances in this area offer the possibility to design nanotherapeutics with improved controllability and functionality for cancer therapy. Herein, we provide a comprehensive summary of typical non-covalent interaction modes, which primarily include hydrophobic interaction, hydrogel bonding, host-guest interaction, π-π stacking, and electrostatic interaction. Special emphasis is placed on the implications of these interaction modes to design novel stimuli-responsive drug delivery principles and concepts, aiming to enhance the spatial, temporal, and dosage precision of drug delivery to cancer cells. Finally, future perspectives are discussed to highlight current challenges and future opportunities in self-assembly-based stimuli-responsive drug delivery nanotechnologies for cancer therapy.
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Affiliation(s)
- Yingqi Liu
- School of Life Science, Chongqing University, Chongqing 400044, P. R. China
| | - Yunyun Wu
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - Zhong Luo
- School of Life Science, Chongqing University, Chongqing 400044, P. R. China
- Corresponding author
| | - Menghuan Li
- School of Life Science, Chongqing University, Chongqing 400044, P. R. China
- Corresponding author
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7
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Visualized thermoresponsive helix-helix switch of polyphenylacetylene with a wide-range tunable transition temperature. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1422-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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8
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Rey‐Tarrío F, Guisán‐Ceinos S, Cuerva JM, Miguel D, Ribagorda M, Quiñoá E, Freire F. Photostability and Dynamic Helical Behavior in Chiral Poly(phenylacetylene)s with a Preferred Screw‐Sense. Angew Chem Int Ed Engl 2022; 61:e202207623. [PMID: 35731840 PMCID: PMC9543806 DOI: 10.1002/anie.202207623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Indexed: 11/18/2022]
Abstract
Helical polymers such as poly(phenylacetylene)s (PPAs) are interesting materials due to the possibility of tuning their helical scaffold (sense and elongation) once they have been prepared and by the presence of external stimuli. The main limitation in the application of PPAs is their poor photostability. These polymers degrade under visible light exposure through a photochemical electrocyclization process. In this work, it was demonstrated, through a selected example, how the photochemical degradation in PPAs is directly related to their dynamic helical behavior. Thus, while PPAs with dynamic helical structures show poor photostability under UV/Vis light exposure, poly‐(R)‐1, bearing an enantiopure sulfoxide group as pendant group and designed to have a quasi‐static helical behavior, shows a large photostability due to the restricted conformational composition at the polyene backbone, needed to orient the conjugated double bonds prior to the photochemical electrocyclization process and the subsequent degradation of the material.
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Affiliation(s)
- Francisco Rey‐Tarrío
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Santiago Guisán‐Ceinos
- Departamento de Química Orgánica Facultad de Ciencias Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Juan M. Cuerva
- Departamento de Química Orgánica. Facultad de Ciencias Universidad de Granada (UGR) Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ) 18071 Granada Spain
| | - Delia Miguel
- Departamento de Fisicoquímica. Facultad de Farmacia Universidad de Granada (UGR, UEQ) 18071 Granada Spain
| | - Maria Ribagorda
- Departamento de Química Orgánica Facultad de Ciencias Universidad Autónoma de Madrid 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela 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 15782 Santiago de Compostela Spain
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9
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Sogawa H. Development of chiral functional materials based on natural chiral compounds. Polym J 2022. [DOI: 10.1038/s41428-022-00677-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Rey-Tarrío F, Guisán-Ceinos S, Cuerva JM, Miguel D, Ribagorda M, Quiñoá E, Freire F. Photostability and Dynamic Helical Behavior in Chiral Poly(phenylacetylene)s with a Preferred Screw‐Sense. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Francisco Rey-Tarrío
- Universidade de Santiago de Compostela - Campus de Santiago: Universidade de Santiago de Compostela CiQUS SPAIN
| | - Santiago Guisán-Ceinos
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Orgánica SPAIN
| | | | - Delia Miguel
- University of Granada: Universidad de Granada Physical Chemistry Department SPAIN
| | - Maria Ribagorda
- Universidad Autonoma de Madrid - Campus de Cantoblanco: Universidad Autonoma de Madrid Química Orgánica SPAIN
| | - Emilio Quiñoá
- Universidade de Santiago de Compostela - Campus de Santiago: Universidade de Santiago de Compostela CiQUS SPAIN
| | - Felix Freire
- Universidade de Santiago de Compostela Jenaro de la Fuente street s/n 15782 Santiago de Compostela SPAIN
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11
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Wang S, Xie S, Zeng H, Du H, Zhang J, Wan X. Self-Reporting Activated Ester-Amine Reaction for Enantioselective Multi-Channel Visual Detection of Chiral Amines. Angew Chem Int Ed Engl 2022; 61:e202202268. [PMID: 35285991 DOI: 10.1002/anie.202202268] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Indexed: 01/04/2023]
Abstract
Chiral recognition is of importance not only in living systems but also in estimating the optical purity of enantiomeric drugs and fabricating advanced materials. Herein we report a novel self-reporting activated ester-amine reaction that can provide multi-channel visual detection of organic amines. It relies on the reaction extent dependent cis-transoid to cis-cisoid helical transition of the polyphenylacetylene backbone and the thus triggered fluorescence. Owing to the high selectivity, this visual process can recognize structurally diverse achiral amines and quantitatively check the impurity content. It also shows an outstanding enantioselectivity towards various chiral amines and can be applied to determine enantiomeric composition. The multiple responses in absorption, circular dichroism, photoluminescence, and circularly polarized luminescence make the helical transition of the polymer backbone a potential detection mode for high-throughput screening of chiral chemicals.
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Affiliation(s)
- Sheng Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Siyu Xie
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Hua Zeng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Hongxu Du
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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12
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Wang S, Xie S, Zeng H, Du H, Zhang J, Wan X. Self‐Reporting Activated Ester‐Amine Reaction for Enantioselective Multi‐Channel Visual Detection of Chiral Amines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sheng Wang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Siyu Xie
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Hua Zeng
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Hongxu Du
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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13
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Qiu Y, Cao S, Sun C, Jiang Q, Xie C, Wang H, Liao Y, Xie X. Thermotropic chirality enhancement of nanoparticles constructed from foldamer/bis(amino acid) complexes. Polym Chem 2022. [DOI: 10.1039/d2py00722c] [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
Herein, chiral nanoparticles are constructed by mixing an artificial foldamer bearing aza-18-crown-6 pendants with l-homocystine perchlorate salt, showing a thermotropic chirality enhancement due to the binding mode changes in the heating process.
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Affiliation(s)
- Yuan Qiu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shuang Cao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Chenchen Sun
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qian Jiang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Chongmo Xie
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hong Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yonggui Liao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiaolin Xie
- State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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14
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Wang S, Hu D, Guan X, Cai S, Shi G, Shuai Z, Zhang J, Peng Q, Wan X. Brightening up Circularly Polarized Luminescence of Monosubstituted Polyacetylene by Conformation Control: Mechanism, Switching, and Sensing. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108010] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sheng Wang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Deping Hu
- Key Laboratory of Organic OptoElectronics and Molecular, Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xiaoyan Guan
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Siliang Cai
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Ge Shi
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Zhigang Shuai
- Key Laboratory of Organic OptoElectronics and Molecular, Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Qian Peng
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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15
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Wang S, Hu D, Guan X, Cai S, Shi G, Shuai Z, Zhang J, Peng Q, Wan X. Brightening up Circularly Polarized Luminescence of Monosubstituted Polyacetylene by Conformation Control: Mechanism, Switching, and Sensing. Angew Chem Int Ed Engl 2021; 60:21918-21926. [PMID: 34309164 DOI: 10.1002/anie.202108010] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/15/2021] [Indexed: 11/09/2022]
Abstract
The first example of luminescent monosubstituted polyacetylenes (mono-PAs) is presented, based on a contracted cis-cisoid polyene backbone. It has an excellent circularly polarized luminescence (CPL) performance with a high dissymmetric factor (up to the order of 10-1 ). The luminescence stems from the helical cis-cisoid PA backbone, which is tightly fixed by the strong intramolecular hydrogen bonds, thereby reversing the energy order of excited states and enabling an emissive energy dissipation. CPL switches are facilely achieved by the solvent and temperature through reversible conformational transition. By taking advantages of fast response and high sensitivity, the thin film of mono-PAs could be used as a CPL-based probe for quantitative detection of trifluoroacetic acid with a wider linear dynamic range than those of photoluminescence and circular dichroism. This work opens a new avenue to develop novel smart CPL materials through modulating conformational transition.
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Affiliation(s)
- Sheng Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Deping Hu
- Key Laboratory of Organic OptoElectronics and Molecular, Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xiaoyan Guan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Siliang Cai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Ge Shi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Zhigang Shuai
- Key Laboratory of Organic OptoElectronics and Molecular, Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Qian Peng
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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16
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Guan X, Wang S, Shi G, Zhang J, Wan X. Thermoswitching of Helical Inversion of Dynamic Polyphenylacetylenes through cis-trans Isomerization of Amide Pendants. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00538] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaoyan Guan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Sheng Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ge Shi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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17
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Cai S, Chen J, Wang S, Zhang J, Wan X. Allostery-Mimicking Self-assembly of Helical Poly(phenylacetylene) Block Copolymers and the Chirality Transfer. Angew Chem Int Ed Engl 2021; 60:9686-9692. [PMID: 33580891 DOI: 10.1002/anie.202100551] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Indexed: 12/22/2022]
Abstract
Allostery can regulate protein self-assembly which further affects biological activities, and achieving precise control over the chiral suprastructures during self-assembly remains challenging. Herein, to mimic the allosterical nature of proteins, the poly(phenylacetylene) block copolymers PPA-b-PsmNap with the dynamic helical backbone were synthesized to investigate their conformational-transition-induced self-assembly. As the helical conformation of the block PsmNap spontaneously transforms from cis-transiod to cis-cisoid, the decreasing solubility of PsmNap blocks in THF induced self-assembly of PPA-b-PsmNap. The self-assembly structures of copolymers can sequentially evolve from vesicles to nanobelts to helical strands during the process of conformation transformation. The screw sense of final helical strands was strictly correlated to the helicity of the block PsmNap. This is helpful to understand the mechanism of allostery-modulated self-assembly.
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Affiliation(s)
- Siliang Cai
- Beijing National Laboratory for Molecular Science, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Junxian Chen
- Beijing National Laboratory for Molecular Science, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Sheng Wang
- Beijing National Laboratory for Molecular Science, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Science, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Science, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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18
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Cai S, Chen J, Wang S, Zhang J, Wan X. Allostery‐Mimicking Self‐assembly of Helical Poly(phenylacetylene) Block Copolymers and the Chirality Transfer. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100551] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Siliang Cai
- Beijing National Laboratory for Molecular Science Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Junxian Chen
- Beijing National Laboratory for Molecular Science Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Sheng Wang
- Beijing National Laboratory for Molecular Science Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Science Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Science Key Laboratory of Polymer Chemistry and Physics of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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19
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Gao Y, Gao T, Wang L, Ma X, Jin R, Kang C, Gao L. Chloride-promoted self-assembly and photoluminescence of naphthalene diimides tethered to polyacetylene. NEW J CHEM 2021. [DOI: 10.1039/d0nj05855f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A novel polyacetylene containing naphthalene diimides (NDIs) in the side chains is sensitive to Cl̄ by structural transformation of the polymer backbone and the NDI aggregates along with turning fluorescence emission on.
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Affiliation(s)
- Yuping Gao
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Tingting Gao
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Liangpeng Wang
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Xiaoye Ma
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Rizhe Jin
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Chuanqing Kang
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Lianxun Gao
- Laboratory of Polymer Composite and Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
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20
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Leigh T, Fernandez-Trillo P. Helical polymers for biological and medical applications. Nat Rev Chem 2020; 4:291-310. [PMID: 37127955 DOI: 10.1038/s41570-020-0180-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2020] [Indexed: 12/14/2022]
Abstract
Helices are the most prevalent secondary structure in biomolecules and play vital roles in their activity. Chemists have been fascinated with mimicking this molecular conformation with synthetic materials. Research has now been devoted to the synthesis and characterization of helical materials, and to understand the design principles behind this molecular architecture. In parallel, work has been done to develop synthetic polymers for biological and medical applications. We now have access to materials with controlled size, molecular conformation, multivalency or functionality. As a result, synthetic polymers are being investigated in areas such as drug and gene delivery, tissue engineering, imaging and sensing, or as polymer therapeutics. Here, we provide a critical view of where these two fields, helical polymers and polymers for biological and medical applications, overlap. We have selected relevant polymer families and examples to illustrate the range of applications that can be targeted and the impact of the helical conformation on the performance. For each family of polymers, we briefly describe how they can be prepared, what helical conformations are observed and what parameters control helicity. We close this Review with an outlook of the challenges ahead, including the characterization of helicity through the process and the identification of biocompatibility.
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21
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Palomo L, Rodríguez R, Medina S, Quiñoá E, Casado J, Freire F, Ramírez FJ. Raman Optical Activity (ROA) as a New Tool to Elucidate the Helical Structure of Poly(phenylacetylene)s. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000651] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Luis Palomo
- Departamento de Química Física Facultad de Ciencias Universidad de Málaga Campus de Teatinos Málaga 29071 Spain
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela Santiago de Compostela 15782 Spain
| | - Samara Medina
- Departamento de Química Física Facultad de Ciencias Universidad de Málaga Campus de Teatinos Málaga 29071 Spain
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela Santiago de Compostela 15782 Spain
| | - Juan Casado
- Departamento de Química Física Facultad de Ciencias Universidad de Málaga Campus de Teatinos Málaga 29071 Spain
| | - Félix Freire
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica Universidade de Santiago de Compostela Santiago de Compostela 15782 Spain
| | - Francisco J. Ramírez
- Departamento de Química Física Facultad de Ciencias Universidad de Málaga Campus de Teatinos Málaga 29071 Spain
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22
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Palomo L, Rodríguez R, Medina S, Quiñoá E, Casado J, Freire F, Ramírez FJ. Raman Optical Activity (ROA) as a New Tool to Elucidate the Helical Structure of Poly(phenylacetylene)s. Angew Chem Int Ed Engl 2020; 59:9080-9087. [PMID: 32125060 DOI: 10.1002/anie.202000651] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/18/2020] [Indexed: 02/02/2023]
Abstract
Poly(phenylacetylene)s are a family of helical polymers constituted by conjugated double bonds. Raman spectra of these polymers show a structural fingerprint of the polyene backbone which, in combination with its helical orientation, makes them good candidates to be studied by Raman optical activity (ROA). Four different well-known poly(phenylacetylene)s adopting different scaffolds and ten different helical senses have been prepared. Raman and ROA spectra were recorded and allowed to establish ROA-spectrum/helical-sense relationships: a left/right-handed orientation of the polyene backbone (Mhelix /Phelix ) produces a triplet of positive/negative ROA bands. Raman and ROA spectra of each polymer exhibited the same profile, and the sign of the ROA spectrum was opposite to the lowest-energy electronic circular dichroism (ECD) band, indicating a resonance effect. Resonance ROA appears then as an indicator of the helical sense of poly(phenylacetylene)s, especially for those with an extra Cotton band in the ECD spectrum, where a wrong helical sense is assigned based on ECD, while ROA alerts of this misassignment.
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Affiliation(s)
- Luis Palomo
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, Málaga, 29071, Spain
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Samara Medina
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, Málaga, 29071, Spain
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Juan Casado
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, Málaga, 29071, Spain
| | - Félix Freire
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Francisco J Ramírez
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, Málaga, 29071, Spain
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23
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Suárez‐Picado E, Quiñoá E, Riguera R, Freire F. Chiral Overpass Induction in Dynamic Helical Polymers Bearing Pendant Groups with Two Chiral Centers. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915213] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Esteban Suárez‐Picado
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Emilio Quiñoá
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Ricardo Riguera
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Félix Freire
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782 Santiago de Compostela Spain
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24
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Suárez-Picado E, Quiñoá E, Riguera R, Freire F. Chiral Overpass Induction in Dynamic Helical Polymers Bearing Pendant Groups with Two Chiral Centers. Angew Chem Int Ed Engl 2020; 59:4537-4543. [PMID: 31880378 DOI: 10.1002/anie.201915213] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Indexed: 12/16/2022]
Abstract
The dynamic behavior of helical polymers bearing pendant groups with two chiral centers was studied. Controlled conformational changes at the chiral units placed either closer to or further away from the main chain promote different helical structures. Although the first residue is usually responsible for determining a specific helicity (P or M), we now found that the second chiral center is also able to induce a preferred helical sense when it is located closer in space to the main chain, thereby cancelling the order from the first chiral moiety. This result was achieved through proper coordination with a metal cation. As proof of concept, poly(phenylacetylene)s (PPAs) that bear one and two chiral amino acid units of different sizes and configuration combinations (l/d-alanine and l/d-phenylalanine) as pendants were evaluated. In total, ten polymers were studied. This constitutes the first report of axial control from a remote stereocenter in polymers bearing complex chiral pendants.
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Affiliation(s)
- Esteban Suárez-Picado
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 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, 15782, Santiago, de Compostela, Spain
| | - Ricardo Riguera
- Centro Singular de investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 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, 15782, Santiago, de Compostela, Spain
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25
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Bergueiro J, Núñez-Martínez M, Arias S, Quiñoá E, Riguera R, Freire F. Chiral gold-PPA nanocomposites with tunable helical sense and morphology. NANOSCALE HORIZONS 2020; 5:495-500. [PMID: 32118234 DOI: 10.1039/c9nh00659a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A novel type of stimuli-responsive dynamic helical polymer-metal nanoparticle nanocomposite formed by a helical poly(phenylacetylene) (PPA) combined with gold nanoparticles (AuNPs) is described. Thus, several PPA copolymers containing the ethynyl-4-benzamide of (S)-phenylglycine methyl ester (M1) to dictate the helical structure/sense of the copolymer, and the ethynyl-4-benzamide of the 11-((2-(2-(2-aminoethoxy)ethoxy)ethyl)amino)undecane-1-thiol (M2) to link the copolymer to the AuNPs are prepared. Different morphologies of these nanocomposites were obtained by considering the thiol ratio and the self-assembly properties of the PPA, which generates from dispersed AuNPs to fibre-like structures. All these nanocomposites show a dynamic chiral behaviour, it being possible to manipulate their helical sense by the action of external stimuli. Moreover, it is possible to control the aggregation of these nanocomposites into macroscopically chiral nanospheres with low polydispersity by using Ba2+ as a crosslinking agent.
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Affiliation(s)
- Julián Bergueiro
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Manuel Núñez-Martínez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Sandra Arias
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 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, 15782 Santiago de Compostela, Spain.
| | - Ricardo Riguera
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 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, 15782 Santiago de Compostela, Spain.
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26
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Shi G, Dai X, Zhou Y, Zhang J, Shen J, Wan X. Synthesis and enantioseparation of proline-derived helical polyacetylenes as chiral stationary phases for HPLC. Polym Chem 2020. [DOI: 10.1039/d0py00205d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Proline-derived aliphatically substituted polyacetylenes with stable helical conformations exhibit an excellent enantioseparation ability as chiral stationary phases of HPLC.
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Affiliation(s)
- Ge Shi
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Xiao Dai
- Polymer Materials Research Center
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
| | - Yue Zhou
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
| | - Jun Shen
- Polymer Materials Research Center
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
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27
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Ma C, Su J, Sun Y, Feng Y, Shen N, Li B, Liang Y, Yang X, Wu H, Zhang H, Herrmann A, Tanzi RE, Liu K, Zhang C. Significant Upregulation of Alzheimer's β-Amyloid Levels in a Living System Induced by Extracellular Elastin Polypeptides. Angew Chem Int Ed Engl 2019; 58:18703-18709. [PMID: 31609093 PMCID: PMC7187254 DOI: 10.1002/anie.201912399] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 01/25/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder and the primary cause of age-related dementia. The etiology of AD is complex and has not been completely elucidated. Herein, we report that treatment with elastin-like polypeptides (ELPs), a component of the brain extracellular matrix (ECM), significantly increased the levels of AD-related amyloid-β peptides (Aβ) both in vitro and in vivo. Regarding the molecular mechanism(s), the upregulation of Aβ levels was related to increased proteolytic processing of the amyloid precursor protein. Furthermore, nesting tests demonstrated that the ELP-treated animals showed significant neurobehavioral deficits with cognitive impairment. These results suggest that the elastin is associated with AD-related pathological and behavioral changes. This finding presents a new aspect for Alzheimer's amyloidosis event and provides a great promise in developing ELP-based model systems to better understand the pathogenesis of AD.
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Affiliation(s)
- Chao Ma
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina
- Zernike Institute for Advanced MaterialsNijenborgh 49747AGGroningenThe Netherlands
| | - Juanjuan Su
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
| | - Yao Sun
- National Engineering Laboratory for AIDS VaccineSchool of Life SciencesJilin UniversityChangchun130012China
| | - Yang Feng
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
| | - Nolan Shen
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
| | - Bo Li
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina
| | - Yingxia Liang
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
| | - Xintong Yang
- Zernike Institute for Advanced MaterialsNijenborgh 49747AGGroningenThe Netherlands
| | - Hui Wu
- National Engineering Laboratory for AIDS VaccineSchool of Life SciencesJilin UniversityChangchun130012China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina
| | - Andreas Herrmann
- Zernike Institute for Advanced MaterialsNijenborgh 49747AGGroningenThe Netherlands
- DWI—Leibniz Institute for Interactive MaterialsForckenbeckstr. 5052056AachenGermany
- Institute of Technical and Macromolecular ChemistryRWTH Aachen UniversityWorringerweg 252074AachenGermany
| | - Rudolph E. Tanzi
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences130022ChangchunChina
| | - Can Zhang
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA
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Ma C, Su J, Sun Y, Feng Y, Shen N, Li B, Liang Y, Yang X, Wu H, Zhang H, Herrmann A, Tanzi RE, Liu K, Zhang C. Significant Upregulation of Alzheimer's β‐Amyloid Levels in a Living System Induced by Extracellular Elastin Polypeptides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912399] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chao Ma
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 130022 Changchun China
- Zernike Institute for Advanced Materials Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Juanjuan Su
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
| | - Yao Sun
- National Engineering Laboratory for AIDS VaccineSchool of Life SciencesJilin University Changchun 130012 China
| | - Yang Feng
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 130022 Changchun China
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
| | - Nolan Shen
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
| | - Bo Li
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 130022 Changchun China
| | - Yingxia Liang
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
| | - Xintong Yang
- Zernike Institute for Advanced Materials Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Hui Wu
- National Engineering Laboratory for AIDS VaccineSchool of Life SciencesJilin University Changchun 130012 China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 130022 Changchun China
| | - Andreas Herrmann
- Zernike Institute for Advanced Materials Nijenborgh 4 9747 AG Groningen The Netherlands
- DWI—Leibniz Institute for Interactive Materials Forckenbeckstr. 50 52056 Aachen Germany
- Institute of Technical and Macromolecular ChemistryRWTH Aachen University Worringerweg 2 52074 Aachen Germany
| | - Rudolph E. Tanzi
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
| | - Kai Liu
- State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryChinese Academy of Sciences 130022 Changchun China
| | - Can Zhang
- Genetics and Aging Research UnitMcCance Center for Brain HealthMassGeneral Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General Hospital and Harvard Medical School Charlestown MA USA
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29
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Fernández B, Rodríguez R, Quiñoá E, Riguera R, Freire F. Decoding the ECD Spectra of Poly(phenylacetylene)s: Structural Significance. ACS OMEGA 2019; 4:5233-5240. [PMID: 31459695 PMCID: PMC6648364 DOI: 10.1021/acsomega.9b00122] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 02/08/2019] [Indexed: 06/10/2023]
Abstract
The role of the main dihedral angles in the electronic circular dichroism (ECD) spectra of poly(phenylacetylene)s (PPAs) was estimated by using time-dependent density functional theory (TD-DFT) for oligo(phenylacetylene)s (n = 12). These studies reveal that in cis-transoidal arrangements, the first Cotton effect is dominated by excitations involving molecular orbitals (MOs) mainly related to the polyene backbone. Hence, for this scaffold, the ± sign of the first Cotton effect reflects the P/M helical sense of the internal helix of the polymer. However, in cis-cisoidal arrangements, contribution of MOs in the polyene and the aryl rings of the PPA backbone produce the first Cotton effect band. As a result, two different ECD signatures with three or four alternating Cotton effects can be produced depending on the sign of the ω1 and ω3 dihedral angles which determine the helical sense of the polyene (ω1) and the relative orientation of the aryl ring toward the polyene (ω3), respectively. Thus, on the one hand, if ω1 and ω3 rotate in opposite directions, a CD with three alternating Cotton effects is observed, where the sign of first Cotton correlates with the P/M helical sense of the polyene. On the other hand, if ω1 and ω3 rotate in the same direction, a CD signature with four alternating Cotton effects is produced where the information relative to the P/M helical sense of the polyene is contained in the second Cotton effect.
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Affiliation(s)
- Berta Fernández
- Department
of Physical Chemistry, University of Santiago
de Compostela, 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, 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, 15782 Santiago de Compostela, Spain
| | - Ricardo Riguera
- Centro
Singular de Investigación en Química Biolóxica
e Materiais Moleculares (CiQUS) and Departamento de Química
Orgánica, Universidade de Santiago
de Compostela, 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, 15782 Santiago de Compostela, Spain
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Shen L, Xu L, Hou XH, Liu N, Wu ZQ. Polymerization Amplified Stereoselectivity (PASS) of Asymmetric Michael Addition Reaction and Aldol Reaction Catalyzed by Helical Poly(phenyl isocyanide) Bearing Secondary Amine Pendants. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02088] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ling Shen
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009 Anhui Province China
| | - Lei Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009 Anhui Province China
| | - Xiao-Hua Hou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009 Anhui Province China
| | - Na Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009 Anhui Province China
| | - Zong-Quan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei 230009 Anhui Province China
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31
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Nieto-Ortega B, Rodríguez R, Medina S, Quiñoá E, Riguera R, Casado J, Freire F, Ramírez FJ. Sequential Induction of Chirality in Helical Polymers: From the Stereocenter to the Achiral Solvent. J Phys Chem Lett 2018; 9:2266-2270. [PMID: 29652510 DOI: 10.1021/acs.jpclett.8b00519] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Several steps of chiral induction have been detected in poly(phenylacetylene)s among their different hierarchical levels of chirality by vibrational circular dichroism, namely, (i) from the stereogenic centers to the innermost polyacetylene helical covalent backbone (helixint), (ii) from this to the external helix (helixext) formed by the side phenyl pendants that form a complementary helix or counter-helix, and (iii) from this pendant helix to the helical solvation sphere (helixsolv.), the last one being observed along this work. The pendant to polyene backbone chiral induction determines the helical structure adopted by the polymer and therefore the solvation helix. This helical structure is promoted by two mechanisms: steric effects and hydrogen bonding. An important finding concerns the demonstration by VCD of how an achiral solvent becomes chirally organized owing to the template effect of the covalent polymer helices, an effect that is silent to other structural techniques such as ECD or AFM and that hence significantly broadens the scope of these previous analyses.
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Affiliation(s)
- Belén Nieto-Ortega
- IMDEA Nanoscience , Ciudad Universitaria de Cantoblanco , Faraday 9 , 28049 Madrid , Spain
| | - Rafael Rodríguez
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Samara Medina
- Departamento de Química Física , Facultad de Ciencias, Universidad de Málaga , Campus de Teatinos s/n, 29071 Málaga , Spain
| | - Emilio Quiñoá
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Ricardo Riguera
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Juan Casado
- Departamento de Química Física , Facultad de Ciencias, Universidad de Málaga , Campus de Teatinos s/n, 29071 Málaga , Spain
| | - Félix Freire
- Centro Singular de Investigación en Química Biolóxica e Materials Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Francisco Javier Ramírez
- Departamento de Química Física , Facultad de Ciencias, Universidad de Málaga , Campus de Teatinos s/n, 29071 Málaga , Spain
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Fernández B, Rodríguez R, Rizzo A, Quiñoá E, Riguera R, Freire F. Predicting the Helical Sense of Poly(phenylacetylene)s from their Electron Circular Dichroism Spectra. Angew Chem Int Ed Engl 2018; 57:3666-3670. [PMID: 29405581 DOI: 10.1002/anie.201713164] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 01/18/2018] [Indexed: 01/20/2023]
Abstract
The calculated ECD spectrum (time-dependent density functional theory TD-DFT) for small oligomers of polyphenylacetylenes (PPAs) show a very good match with the experimental spectra of the PPA polymers, particularly with the first Cotton band associated to the helical sense of the internal polyenic backbone. This has been proven with a series of PPAs representative of cis-cisoidal, cis-transoidal, compressed and stretched polyene backbones, with identical or opposite internal/external rotational senses and allows the prediction of the helical sense of the internal helix of a PPA directly from its CD spectra.
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Affiliation(s)
- Berta Fernández
- Departmento de Química Física, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Rafael Rodríguez
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS), Santiago de Compostela, Spain
| | - Antonio Rizzo
- Instituto per i Processi Chimico-Fisici (IPCF), Consiglio Nazionale delle Ricerche (CNR), Area della Ricerca di Pisa, 56124, Pisa, Italy
| | - Emilio Quiñoá
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS), Santiago de Compostela, Spain
| | - Ricardo Riguera
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS), Santiago de Compostela, Spain
| | - Félix Freire
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS), Santiago de Compostela, Spain
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33
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Fernández B, Rodríguez R, Rizzo A, Quiñoá E, Riguera R, Freire F. Predicting the Helical Sense of Poly(phenylacetylene)s from their Electron Circular Dichroism Spectra. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713164] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Berta Fernández
- Departmento de Química Física; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Rafael Rodríguez
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica; Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS); Santiago de Compostela Spain
| | - Antonio Rizzo
- Instituto per i Processi Chimico-Fisici (IPCF); Consiglio Nazionale delle Ricerche (CNR), Area della Ricerca di Pisa; 56124 Pisa Italy
| | - Emilio Quiñoá
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica; Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS); Santiago de Compostela Spain
| | - Ricardo Riguera
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica; Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS); Santiago de Compostela Spain
| | - Félix Freire
- Centro Singular de investigación en Química Biolóxica e, Materiais Moleculares (CiQUS) e Departamento de Química Orgánica; Universidade de Santiago de Compostela, Jenaro de la Fuente s/n (Edificio CiQUS); Santiago de Compostela Spain
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Shi G, Wang S, Guan X, Zhang J, Wan X. Synthesis and thermo-responsive behavior of helical polyacetylenes derived from proline. Chem Commun (Camb) 2018; 54:12081-12084. [DOI: 10.1039/c8cc05856c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structurally simple, biomass-based helical polyacetylene exhibits an unexpected lower critical solution temperature in an aqueous solution with a narrow phase-transition window and a small hysteresis.
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Affiliation(s)
- Ge Shi
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University
- Beijing
- China
| | - Sheng Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University
- Beijing
- China
| | - Xiaoyan Guan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University
- Beijing
- China
| | - Jie Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University
- Beijing
- China
| | - Xinhua Wan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University
- Beijing
- China
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