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Otsuka C, Imai S, Ohkubo T, Yagai S. Toroid-rod supramolecular polymorphism derived from conformational isomerism of a π-conjugated system. Chem Commun (Camb) 2024; 60:1108-1111. [PMID: 38168679 DOI: 10.1039/d3cc05492f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Hydrogen-bonded supermacrocycles (rosettes) composed of dinaphthylethene π-conjugated systems show unique supramolecular polymorphism affording nanorings and nanorods via kinetically controlled self-assembly. Molecular modeling and molecular dynamics simulations proposed that conformational isomerism of the π-conjugated systems leads to planar and convex rosette geometries, which results in their distinct stacking arrangements.
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Affiliation(s)
- Chie Otsuka
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Saki Imai
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
| | - Takahiro Ohkubo
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan.
| | - Shiki Yagai
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan.
- Institute for Advanced Academic Research (IAAR), Chiba 263-8522, Japan
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2
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Chakraborty A, Das PK, Jana B, Ghosh S. Supramolecular alternating copolymers with highly efficient fluorescence resonance energy transfer. Chem Sci 2023; 14:10875-10883. [PMID: 37829017 PMCID: PMC10566455 DOI: 10.1039/d3sc03056c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
This article reports alternating supramolecular copolymerization of two naphthalene-diimide (NDI)-derived building blocks (NDI-1 and NDI-2) under thermodynamic control. Both monomers contain a central NDI chromophore, attached to a hydrocarbon-chain and a carboxylic-acid group. The NDI core in NDI-2 is symmetrically substituted with two butane-thiol groups, which makes it distinct from NDI-1. In decane, a 1 : 1 mixture of NDI-1 and NDI-2 shows spontaneous gelation and a typical fibrillar network, unlike the behavior of either of the components individually. The solvent-dependent UV/vis spectrum of the mixed sample in decane shows bathochromically shifted sharp absorption bands and a sharp emission band (holds a mirror-image relationship) with a significantly small Stokes shift compared to those in CHCl3, indicating J-aggregation. In contrast, the aggregated spectra of the individual monomers show broad structureless features, suggesting ill-defined aggregates. Cooling curves derived from the temperature-dependent UV/vis spectroscopy studies revealed early nucleation and a signature of well-defined cooperative polymerization for the mixed sample, unlike either of the individual components. Molecular dynamics simulations predicted the greatest dimer formation tendency for the NDI-1 + NDI-2 (1 : 1), followed by pure NDI-1 and NDI-2. Theoretical studies further revealed a partial positive charge in the NDI ring of NDI-1 when compared to NDI-2, promoting the alternating stacking propensity, which is also favored by the steric factor as NDI-2 is core-substituted with alkyl thiols. Such theoretical predictions fully corroborate with the experimental results showing 1 : 1 stoichiometry (from Job's plot) of the two monomers, indicating alternate stacking sequences in the H-bonded (syn-syn catemer type) supramolecular copolymer. Such alternating supramolecular copolymers showed highly efficient (>93%) fluorescence resonance energy transfer (FRET).
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Affiliation(s)
- Anwesha Chakraborty
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road Kolkata 700032 India
| | - Pradipta Kumar Das
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road 700032 Kolkata India
| | - Biman Jana
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road 700032 Kolkata India
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road Kolkata 700032 India
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Safronov NE, Kostova IP, Palafox MA, Belskaya NP. Combined NMR Spectroscopy and Quantum-Chemical Calculations in Fluorescent 1,2,3-Triazole-4-carboxylic Acids Fine Structures Analysis. Int J Mol Sci 2023; 24:ijms24108947. [PMID: 37240293 DOI: 10.3390/ijms24108947] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/09/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023] Open
Abstract
The peculiarities of the optical properties of 2-aryl-1,2,3-triazole acids and their sodium salts were investigated in different solvents (1,4-dioxane, dimethyl sulfoxide DMSO, methanol MeOH) and in mixtures with water. The results were discussed in terms of the molecular structure formed by inter- and intramolecular noncovalent interactions (NCIs) and their ability to ionize in anions. Theoretical calculations using the Time-Dependent Density Functional Theory (TDDFT) were carried out in different solvents to support the results. In polar and nonpolar solvents (DMSO, 1,4-dioxane), fluorescence was provided by strong neutral associates. Protic MeOH can weaken the acid molecules' association, forming other fluorescent species. The fluorescent species in water exhibited similar optical characteristics to those of triazole salts; therefore, their anionic character can be assumed. Experimental 1H and 13C-NMR spectra were compared to their corresponding calculated spectra using the Gauge-Independent Atomic Orbital (GIAO) method and several relationships were established. All these findings showed that the obtained photophysical properties of the 2-aryl-1,2,3-triazole acids noticeably depend on the environment and, therefore, are good candidates as sensors for the identification of analytes with labile protons.
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Affiliation(s)
- Nikita E Safronov
- Department of Technology for Organic Synthesis, Ural Federal University, 19 Mira Str., Yekaterinburg 620002, Russia
| | - Irena P Kostova
- Department of Chemistry, Faculty of Pharmacy, Medical University-Sofia, 2 Dunav Str., 1000 Sofia, Bulgaria
| | - Mauricio Alcolea Palafox
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - Nataliya P Belskaya
- Department of Technology for Organic Synthesis, Ural Federal University, 19 Mira Str., Yekaterinburg 620002, Russia
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Ghosh G, Chakraborty A, Pal P, Jana B, Ghosh S. Direct Participation of Solvent Molecules in the Formation of Supramolecular Polymers. Chemistry 2022; 28:e202201082. [PMID: 35475531 DOI: 10.1002/chem.202201082] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Indexed: 11/05/2022]
Abstract
This article reports supramolecular polymerization of two bis-amide functionalized naphthalene-diimide (NDI) building blocks (NDI-L and NDI-C) in two solvents, namely n-heptane (Hep) and methylcyclohexane (MCH). NDI-L and NDI-C differ only by the peripheral hydrocarbon wedges, consisting of linear C7 chains or cyclic methylcyclohexane rings, respectively. UV/Vis and FTIR spectroscopy studies reveal distinct internal order and H-bonding pattern for NDI-L and NDI-C aggregates irrespective of the solvent system, indicating the dominant role of the intrinsic packing parameters of the individual building block, possibly influenced by the peripheral steric crowding. However, NDI-L produces a significantly stronger gel in Hep compared to MCH as evident from the rheological and thermal properties. In contrast, NDI-C exhibits a clear preference for MCH, producing gel with moderate strength but in Hep it fails to produce 1D morphology or gelation. All-atom molecular dynamics (MD) simulation studies corroborate with the experimental observation and provide the rationale for the observed solvent-shape effect by revealing a quantitative estimate regarding the thermodynamics of self-assembly in these four combinations. Such clear-cut shape-matching effect (between the peripheral hydrocarbon wedge and the solvent system) unambiguously support a direct participation of the solvent molecules during supramolecular polymerization and presence of a closely-adhered solvent shell around the supramolecular polymers, similar to the first layer of water molecules around the protein surface. Solvent induced CD experiments support this hypothesis as induced CD band was observed only from a chiral co-solvent of matching shape. This is reconfirmed by the higher de-solvation temperature of the shape-matching NDI/solvent system combination compared to the shape mis-match combination in variable temperature UV/Vis experiments, revealing transformation to a different aggregate at higher temperatures rather than disassembly to the monomer for all four combinations.
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Affiliation(s)
- Goutam Ghosh
- School of Applied and Interdisciplinary Sciences Indian Association for the Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Anwesha Chakraborty
- School of Applied and Interdisciplinary Sciences Indian Association for the Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Prasun Pal
- School of Chemical Sciences Indian Association for the Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Biman Jana
- School of Chemical Sciences Indian Association for the Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary Sciences Indian Association for the Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
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Matern J, Fernández Z, Bäumer N, Fernández G. Expanding the Scope of Metastable Species in Hydrogen Bonding‐Directed Supramolecular Polymerization. Angew Chem Int Ed Engl 2022; 61:e202203783. [PMID: 35362184 PMCID: PMC9321731 DOI: 10.1002/anie.202203783] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Indexed: 12/23/2022]
Abstract
We reveal unique hydrogen (H‐) bonding patterns and exploit them to control the kinetics, pathways and length of supramolecular polymers (SPs). New bisamide‐containing monomers were designed to elucidate the role of competing intra‐ vs. intermolecular H‐bonding interactions on the kinetics of supramolecular polymerization (SP). Remarkably, two polymerization‐inactive metastable states were discovered. Contrary to previous examples, the commonly assumed intramolecularly H‐bonded monomer does not evolve into intermolecularly H‐bonded SPs via ring opening, but rather forms a metastable dimer. In this dimer, all H‐bonding sites are saturated, either intra‐ or intermolecularly, hampering elongation. The dimers exhibit an advantageous preorganization, which upon opening of the intramolecular portion of the H‐bonding motif facilitates SP in a consecutive process. The retardation of spontaneous self‐assembly as a result of two metastable states enables length control in SP by seed‐mediated growth.
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Affiliation(s)
- Jonas Matern
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Zulema Fernández
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Nils Bäumer
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Gustavo Fernández
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 36 48149 Münster Germany
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Matern J, Fernandez Z, Bäumer N, Fernandez G. Expanding the Scope of Metastable Species in Hydrogen Bonding‐Directed Supramolecular Polymerization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jonas Matern
- WWU Münster: Westfalische Wilhelms-Universitat Munster Organisch-Chemisches Institut GERMANY
| | - Zulema Fernandez
- WWU Münster: Westfalische Wilhelms-Universitat Munster Organisch-Chemisches Institut GERMANY
| | - Nils Bäumer
- WWU Münster: Westfalische Wilhelms-Universitat Munster Organisch-Chemisches Institut GERMANY
| | - Gustavo Fernandez
- WWU Münster Organisch-Chemisches Institut Correnstraße, 4ß 48149 Münster GERMANY
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Ghosh A, Dubey SK, Patra M, Mandal J, Ghosh NN, Saha R, Bhattacharjee S. Coiled‐Coil Helical Nano‐Assemblies: Shape Persistent, Thixotropic, and Tunable Chiroptical Properties. ChemistrySelect 2022. [DOI: 10.1002/slct.202103942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Angshuman Ghosh
- Department of Chemistry Kazi Nazrul University Asansol 713340 West Bengal India
- TCG Lifescience, Block BN, Sector V, Saltlake Kolkata 700156 West Bengal India
| | - Soumen Kumar Dubey
- Department of Chemistry Kazi Nazrul University Asansol 713340 West Bengal India
| | - Maxcimilan Patra
- Department of Chemistry Kazi Nazrul University Asansol 713340 West Bengal India
| | - Jishu Mandal
- CIF Biophysical Laboratory CSIR-Indian Institute of Chemical Biology Jadavpur Kolkata 700032 West Bengal India
| | - Narendra Nath Ghosh
- Department of Chemistry University of Gour Banga Mokdumpur- 732103 West Bengal India
| | - Rajat Saha
- Department of Chemistry Kazi Nazrul University Asansol 713340 West Bengal India
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