1
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Ng S, Xie Y, Schaefer HF. Hydrogen bonding in 2,2,2-trifluoroethanol. J Mol Model 2024; 30:333. [PMID: 39276285 DOI: 10.1007/s00894-024-06135-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Accepted: 09/03/2024] [Indexed: 09/16/2024]
Abstract
CONTEXT 2,2,2-Trifluoroethanol (TFE) is known as a membrane mimetic solvent. The IR spectrum, 1H NMR spectrum, 13C NMR spin‒lattice relaxation times (T1), and nuclear Overhauser effect (NOE) data are consistent with extensive hydrogen bonding in TFE, but do not lead to structural features of the hydrogen bonding. Hence, DFT computations were carried out. The results predict the existence of a set of H-bonded dimers and trimers. The bond lengths and dihedral angles in these complexes are obtained, together with their dissociation energies. Computations were also performed for the geometry of the two conformers of the isolated monomer. The structure of one of the dimers consists of a 7-member cyclic fragment with a free CF3CH2 side chain. One set of the trimer structures involves the OH of a third monomer H-bonding to one of the F atoms in the CF3 group of the side chain of this dimer, thereby creating three trimer isomers. A fourth trimer cluster is formed from three monomers in which three OH∙∙∙O bonds create a cyclic fragment with three CF3CH2 side chains. The high dissociation energy (with respect to three monomers) indicates the high stability of the trimer complexes. The structural features of the trimer complexes resemble the structure of a conventional liquid crystal molecule and are postulated to resemble the latter in properties and function in solution, but at a much shorter timescale because of the noncovalent bonding. This hydrogen bonding phenomenon of TFE may be related to its function as a membrane memetic solvent. METHODS Initially, IR and NMR spectroscopic methods were used. Standard procedures were followed. For the computations, a hybrid DFT method with empirical dispersion, ωB97X-D, was used. The basis set, 6-311++G**, is of triple-ζ quality, in which polarization functions and diffuse functions were added for all atoms.
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Affiliation(s)
- Soon Ng
- Department of Chemistry, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Yaoming Xie
- Center for Computational Quantum Chemistry, University of Georgia, Athens, GA, 30602, USA
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, GA, 30602, USA
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2
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Baek S, Heo JM, Bae K, Khazi MI, Lee S, Kim K, Kim JM. Co-assembly-Directed Enhancement of the Thermochromic Reversibility and Solvatochromic Selectivity of Supramolecular Polydiacetylene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39133524 DOI: 10.1021/acs.langmuir.4c02167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
The construction of functional materials via the co-assembly of multimolecular systems has recently emerged as a fascinating topic. The co-assembled multicomponent could promote the evolution of supramolecular assemblies into a high-order nanoarchitecture with improved functional properties. We report the successful preparation of a dual-functional polydiacetylene (MCPDA-Tz-CA) having thermochromic and solvatochromic properties via facile co-assembly of MCDA-Tz and cyanuric acid (MCDA-Tz-CA) followed by ultraviolet-induced polymerization. Molecular packing patterns from powder X-ray diffraction and density functional theory calculations of molecular self-assembly processes confirm highly ordered co-assembled lamellar structures. MCPDA-Tz-CA showed excellent reversible thermochromism properties when the temperature was increased from 30 to 150 °C with a reversible blue-to-red color transition that could be detected by the naked eye. Also, MCPDA-Tz-CA displayed selective blue-to-red solvatochromism against dimethylformamide and dimethyl sulfoxide. Detailed investigations revealed that the enhanced thermochromic reversibility and solvatochromic selectivity could be attributed to the hydrogen-bonding interactions and the formation of a network structure in the MCDA-Tz/cyanuric acid co-assembly. Our research opens a promising route for improving the performance of functional materials via noncovalent multicomponent arrangements at the molecular level.
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Affiliation(s)
- Seungjoo Baek
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Jung-Moo Heo
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Kwangmin Bae
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Mohammed Iqbal Khazi
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Korea
| | - Seongjae Lee
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Kyeounghak Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
| | - Jong-Man Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Korea
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3
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Chen XY, Cao LH, Bai XT, Cao XJ. Charge-Assisted Ionic Hydrogen-Bonded Organic Frameworks: Designable and Stabilized Multifunctional Materials. Chemistry 2024; 30:e202303580. [PMID: 38179818 DOI: 10.1002/chem.202303580] [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: 10/28/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
Hydrogen-bonded organic frameworks (HOFs) are a class of crystalline framework materials assembled by hydrogen bonds. HOFs have the advantages of high crystallinity, mild reaction conditions, good solution processability, and reproducibility. Coupled with the reversibility and flexibility of hydrogen bonds, HOFs can be assembled into a wide diversity of crystalline structures. Since the bonding energy of hydrogen bonds is lower than that of ligand and covalent bonds, the framework of HOFs is prone to collapse after desolventisation and the stability is not high, which limits the development and application of HOFs. In recent years, numerous stable and functional HOFs have been developed by π-π stacking, highly interpenetrated networks, charge-assisted, ligand-bond-assisted, molecular weaving, and covalent cross-linking. Charge-assisted ionic HOFs introduce electrostatic attraction into HOFs to improve stability while enriching structural diversity and functionality. In this paper, we review the development, the principles of rational design and assembly of charge-assisted ionic HOFs, and introduces the different building block construction modes of charge-assisted ionic HOFs. Highlight the applications of charge-assisted ionic HOFs in gas adsorption and separation, proton conduction, biological applications, etc., and prospects for the diverse design of charge-assisted ionic HOFs structures and multifunctional applications.
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Affiliation(s)
- Xu-Yong Chen
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Li-Hui Cao
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Xiang-Tian Bai
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Xiao-Jie Cao
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
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4
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Xing G, Peng D, Ben T. Crystalline porous organic salts. Chem Soc Rev 2024; 53:1495-1513. [PMID: 38165686 DOI: 10.1039/d3cs00855j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Crystalline porous organic salts (CPOSs), formed by the self-assembly of organic acids and organic bases through ionic bonding, possess definite structures and permanent porosity and have rapidly emerged as an important class of porous organic materials in recent years. By rationally designing and controlling tectons, acidity/basicity (pKa), and topology, stable CPOSs with permanent porosity can be efficiently constructed. The characteristics of ionic bonds, charge-separated highly polar nano-confined channels, and permanent porosity endow CPOSs with unique physicochemical properties, offering extensive research opportunities for exploring their functionalities and application scenarios. In this review, we systematically summarize the latest progress in CPOS research, describe the synthetic strategies for synthesizing CPOSs, delineate their structural characteristics, and highlight the differences between CPOSs and hydrogen-bonded organic frameworks (HOFs). Furthermore, we provide an overview of the potential applications of CPOSs in areas such as negative linear compression (NLC), proton conduction, rapid transport of CO2, selective and rapid transport of K+ ions, atmospheric water harvesting (AWH), gas sorption, molecular rotors, fluorescence modulation, room-temperature phosphorescence (RTP) and catalysis. Finally, the challenges and future perspectives of CPOSs are presented.
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Affiliation(s)
- Guolong Xing
- Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, Jinhua, 321004, P. R. China.
- Science and Technology Center for Quantum Biology, National Institute of Extremely-Weak Magnetic Field Infrastructure, Hangzhou 310000, P. R. China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, P. R. China
| | - Daoling Peng
- Science and Technology Center for Quantum Biology, National Institute of Extremely-Weak Magnetic Field Infrastructure, Hangzhou 310000, P. R. China
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Environment, South China Normal University, Guangzhou 510006, P. R. China
| | - Teng Ben
- Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, Jinhua, 321004, P. R. China.
- Science and Technology Center for Quantum Biology, National Institute of Extremely-Weak Magnetic Field Infrastructure, Hangzhou 310000, P. R. China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, P. R. China
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5
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Beckett MA, Coles SJ, Horton PN, Rixon TA. Structural (XRD) Characterization and an Analysis of H-Bonding Motifs in Some Tetrahydroxidohexaoxidopentaborate(1-) Salts of N-Substituted Guanidinium Cations. Molecules 2023; 28:molecules28073273. [PMID: 37050036 PMCID: PMC10096507 DOI: 10.3390/molecules28073273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/14/2023] Open
Abstract
The synthesis and characterization of six new substituted guanidium tetrahydroxidohexaoxidopentaborate(1-) salts are reported: [C(NH2)2(NHMe)][B5O6(OH)4]·H2O (1), [C(NH2)2(NH{NH2})][B5O6(OH)4] (2), [C(NH2)2(NMe2)][B5O6(OH)4] (3), [C(NH2)(NMe2)2][B5O6(OH)4] (4), [C(NHMe)(NMe2)2][B5O6(OH)4]·B(OH)3 (5), and [TBDH][B5O6(OH)4] (6) (TBD = 1,5,7-triazabicyclo [4.4.0]dec-5-ene). Compounds 1-6 were prepared as crystalline salts from basic aqueous solution via self-assembly processes from B(OH)3 and the appropriate substituted cation. Compounds 1-6 were characterized by spectroscopic (NMR and IR) and by single-crystal XRD studies. A thermal (TGA) analysis on compounds 1-3 and 6 demonstrated that they thermally decomposed via a multistage process to B2O3 at >650 °C. The low temperature stage (<250 °C) was endothermic and corresponded to a loss of H2O. Reactant stoichiometry, solid-state packing, and H-bonding interactions are all important in assembling these structures. An analysis of H-bonding motifs in known unsubstituted guanidinium salts [C(NH2)3]2[B4O5(OH)4]·2H2O, [C(NH2)3][B5O6(OH)4]·H2O, and [C(NH2)3]3[B9O12(OH)6] and in compounds 1-6 revealed that two important H-bonding R22(8) motifs competed to stabilize the observed structures. The guanidinium cation formed charge-assisted pincer cation-anion H-bonded rings as a major motif in [C(NH2)3]2[B4O5(OH)4]·2H2O and [C(NH2)3]3[B9O12(OH)6], whereas the anion-anion ring motif was dominant in [C(NH2)3][B5O6(OH)4]·H2O and in compounds 1-6. This behaviour was consistent with the stoichiometry of the salt and packing effects also strongly influencing their solid-state structures.
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Affiliation(s)
- Michael A Beckett
- School of Natural Sciences, Bangor University, Bangor, Gwynedd LL57 2UW, UK
| | - Simon J Coles
- Chemistry Department, University of Southampton, Southampton SO17 1BJ, UK
| | - Peter N Horton
- Chemistry Department, University of Southampton, Southampton SO17 1BJ, UK
| | - Thomas A Rixon
- School of Natural Sciences, Bangor University, Bangor, Gwynedd LL57 2UW, UK
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Protonation‐Induced Antiaromaticity in Octaaza[8]circulenes: Cyclooctatetraene Scaffolds Constrained with Four Amidine Moieties. Chem Asian J 2022; 17:e202200244. [DOI: 10.1002/asia.202200244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/04/2022] [Indexed: 11/07/2022]
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7
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Zhao X, Wang H, Li B, Zhang W, Li X, Zhao W, Janiak C, Heard AW, Yang X, Wu B. A Hydrogen‐Bonded Ravel Assembled by Anion Coordination. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115042] [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)
- Xiaotong Zhao
- College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Heng Wang
- College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518055 China
| | - Boyang Li
- College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Wenyao Zhang
- College of Chemistry and Materials Science Northwest University Xi'an 710069 China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518055 China
| | - Wei Zhao
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 102488 China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Andrew W. Heard
- Department of Chemistry University of Cambridge Cambridge UK
| | - Xiao‐Juan Yang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 102488 China
| | - Biao Wu
- College of Chemistry and Materials Science Northwest University Xi'an 710069 China
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 102488 China
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8
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Zhao X, Wang H, Li B, Zhang W, Li X, Zhao W, Janiak C, Heard AW, Yang XJ, Wu B. A Hydrogen-Bonded Ravel Assembled by Anion Coordination. Angew Chem Int Ed Engl 2021; 61:e202115042. [PMID: 34850515 DOI: 10.1002/anie.202115042] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Indexed: 11/08/2022]
Abstract
Anion-coordination-driven assembly (ACDA) is showing increasing power in the construction of anionic supramolecular architectures. Herein, by expanding the anion centers from oxoanion (phosphate or sulfate) to organic tris-carboxylates, an Archimedean solid (truncated tetrahedron) and a highly entangled, double-walled tetrahedron featuring a ravel topology have been assembled with tris-bis(urea) ligands. The results demonstrate the promising ability of tris-carboxylates as new anion coordination centers in constructing novel topologies with increasing complexity and diversity compared to phosphate or sulfate ions on account of the modifiable size and easy functionalization character of these organic anions.
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Affiliation(s)
- Xiaotong Zhao
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Heng Wang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, China
| | - Boyang Li
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Wenyao Zhang
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, China
| | - Wei Zhao
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204, Düsseldorf, Germany
| | - Andrew W Heard
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Xiao-Juan Yang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Biao Wu
- College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China.,Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
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9
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Jiang H, Xie L, Duan Z, Lin K, He Q, Lynch VM, Sessler JL, Wang H. Fluorescent Supramolecular Organic Frameworks Constructed by Amidinium-Carboxylate Salt Bridges. Chemistry 2021; 27:15006-15012. [PMID: 34288158 DOI: 10.1002/chem.202102296] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Indexed: 12/14/2022]
Abstract
We report here a set of fluorescent supramolecular organic frameworks (SOFs) that incorporate aggregation-induced emission (AIE) units within their frameworks. The fluorescent SOFs of this study were constructed by linking the tetraphenylethylene (TPE)-based tetra(amidinium) cation TPE4+ and aromatic dicarboxylate anions through amidinium-carboxylate salt bridges. The resulting self-assembled structures are characterized by fluorescence quantum yields in the range of 4.6∼14 %. This emissive behavior is ascribed to a combination of electrostatic interactions and hydrogen bonds that operate in concert to impede motions that would otherwise lead to excited state energy dissipation. Single-crystal X-ray diffraction analyses revealed that the length of the dicarboxylate anion bridges has a considerable impact on the structural features of the resulting frameworks. Nevertheless, all SOFs prepared in the context of the present study were found to display emissive features characteristic of TPE-based AIE luminogens with only a modest dependence on the structural specifics being seen. The SOFs reported here could be reversibly "broken up" and "reformed" in response to acid/base stimuli. This reversible structural behavior is consistent with their SOF nature.
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Affiliation(s)
- Hongqin Jiang
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China
| | - Linhuang Xie
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China
| | - Zhiming Duan
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China
| | - Kunhua Lin
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China
| | - Qing He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Vincent M Lynch
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street A5300, Austin, Texas 78712, United States
| | - Jonathan L Sessler
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.,Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street A5300, Austin, Texas 78712, United States
| | - Hongyu Wang
- Department of Chemistry, College of Science, and Center for Supramolecular Chemistry & Catalysis, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China
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10
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White NG. Amidinium⋯carboxylate frameworks: predictable, robust, water-stable hydrogen bonded materials. Chem Commun (Camb) 2021; 57:10998-11008. [PMID: 34605517 DOI: 10.1039/d1cc04782e] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the last few years, the amidinium⋯carboxylate interaction has emerged as a powerful tool for the relatively predictable construction of families of three dimensional hydrogen bonded organic frameworks. These frameworks can be prepared in water and are surprisingly stable, including to heating in polar organic solvents and water. This feature article describes the design and synthesis of these materials, discusses their structures and stability, and highlights their recent applications for enzyme encapsulation and as precursors for the synthesis of molecularly thin hydrogen bonded 2D nanosheets.
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Affiliation(s)
- Nicholas G White
- Research School of Chemistry, The Australian National University, Canberra, ACT, Australia.
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11
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Yu LJ, Cullen DA, Morshedi M, Coote ML, White NG. Room Temperature Hydrolysis of Benzamidines and Benzamidiniums in Weakly Basic Water. J Org Chem 2021; 86:13762-13767. [PMID: 34549965 DOI: 10.1021/acs.joc.1c01955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Benzamidinium compounds have found widespread use in both medicinal and supramolecular chemistry. In this work, we show that benzamidiniums hydrolyze at room temperature in aqueous base to give the corresponding primary amide. This reaction has a half-life of 300 days for unsubstituted benzamidinium at pH 9, but is relatively rapid at higher pH's (e.g., t1/2 = 6 days at pH 11 and 15 h at pH 13). Quantum chemistry combined with first-principles kinetic modeling can reproduce these trends and explain them in terms of the dominant pathway being initiated by attack of HO- on benzamidine. Incorporation of the amidinium motif into a hydrogen bonded framework offers a substantial protective effect against hydrolysis.
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Affiliation(s)
- Li-Juan Yu
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - Duncan A Cullen
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - Mahbod Morshedi
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - Michelle L Coote
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
| | - Nicholas G White
- Research School of Chemistry, Australian National University, Canberra, ACT 2600, Australia
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12
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Kusukawa T, Matoba K, Hoshihara Y, Tanaka S, Nakajima A. Carboxylic acid recognition of an N-ethyl-substituted diamidine having a diphenylnaphthalene unit in competing protic solvents. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Nam PC, Thong NM, Hoa NT, Quang DT, Hoang LP, Mechler A, Vo QV. Is natural fraxin an overlooked radical scavenger? RSC Adv 2021; 11:14269-14275. [PMID: 35423974 PMCID: PMC8697747 DOI: 10.1039/d1ra01360b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/02/2021] [Indexed: 01/08/2023] Open
Abstract
Fraxin (FX) (7-hydroxy-6-methoxycoumarin 8-glucoside) is a typical natural product of the coumarin family. This compound was shown to protect endothelial cells from oxidative stress; however, the nature of its antioxidant properties is still ambiguous. In this study, we report on a systematic evaluation of the radical scavenging activity of FX using a two-tier protocol based on thermodynamic and kinetic calculations. The results show that FX has moderate activity in the aqueous physiological environment against a range of radicals including HO˙, CCl3O˙, CCl3OO˙, NO2, , and HOO˙. The latter was examined in detail due to the prevalence of HOO˙ as a source of oxidative stress in biological systems. HOO˙ scavenging activity was promising in the gas phase but low in physiological environments with k overall = 1.57 × 106, 3.13 × 102 and 2.68 × 103 M-1 s-1 in the gas phase, pentyl ethanoate and water solvents, respectively. The formal hydrogen transfer mechanism at the O7-H bond dominates the hydroperoxyl radical scavenging of FX in the nonpolar media, whereas, in the polar environment, the activity is exerted by the single electron transfer mechanism of the anion state. This activity falls behind typical antioxidants such as Trolox, ascorbic acid, and trans-resveratrol under the studied conditions. Thus FX may have multiple health benefits, but it is not an outstanding natural antioxidant.
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Affiliation(s)
- Pham Cam Nam
- Department of Chemical Engineering, The University of Danang - University of Science and Technology Danang 550000 Vietnam
| | - Nguyen Minh Thong
- The University of Danang, Campus in Kon Tum 704 Phan Dinh Phung Kon Tum Vietnam
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | | | - Loc Phuoc Hoang
- Institute of Research and Development, Duy Tan University Danang 550000 Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University Victoria 3086 Australia
| | - Quan V Vo
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
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14
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Nicks J, Boer SA, White NG, Foster JA. Monolayer nanosheets formed by liquid exfoliation of charge-assisted hydrogen-bonded frameworks. Chem Sci 2021; 12:3322-3327. [PMID: 34164102 PMCID: PMC8179369 DOI: 10.1039/d0sc06906j] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
Hydrogen-bonded organic frameworks (HOFs) are a diverse and tunable class of materials, but their potential as free-standing two-dimensional nanomaterials has yet to be explored. Here we report the self-assembly of two layered hydrogen-bonded frameworks based on strong, charge-assisted hydrogen-bonding between carboxylate and amidinium groups. Ultrasound-assisted liquid exfoliation of both materials readily produces monolayer hydrogen-bonded organic nanosheets (HONs) with micron-sized lateral dimensions. The HONs show remarkable stability and maintain their extended crystallinity and monolayer structures even after being suspended in water at 80 °C for three days. These systems also exhibit efficient fluorescence quenching of an organic dye in organic solvents, superior to the quenching ability of the bulk frameworks. We anticipate that this approach will provide a route towards a diverse new family of molecular two-dimensional materials.
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Affiliation(s)
- Joshua Nicks
- Department of Chemistry, University of Sheffield Sheffield UK
| | - Stephanie A Boer
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
| | - Nicholas G White
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
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15
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Thomas CM, Foyle ÉM, Walker SE, White NG. An Investigation of Five Component [3+2] Self-Assembled Cage Formation Using Amidinium···Carboxylate Hydrogen Bonds. Aust J Chem 2021. [DOI: 10.1071/ch21101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The assembly of hydrogen bonded cages using amidinium···carboxylate hydrogen bonding interactions was investigated. A new tris-amidinium hydrogen bond donor tecton based on a tetraphenylmethane scaffold was prepared and its self-assembly with the terephthalate anion studied, and a new tricarboxylate hydrogen bond acceptor tecton was synthesised and its assembly with the 1,3-benzenebis(amidinium) hydrogen bond donor explored. In both cases, molecular modelling indicated that the formation of the cages was geometrically feasible and 1H NMR spectroscopic evidence was consistent with interactions between the components in competitive d6-DMSO solvent mixtures. DOSY NMR spectroscopy of both systems indicated that both components diffuse at the same rate as each other, and diffusion coefficients were consistent with cage formation, and with the formation of assemblies significantly larger than the individual components. An X-ray crystal structure showed that one of the assemblies did not have the desired cage structure in the solid state.
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16
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Xu Z, Cui Y, Guo B, Li H, Li H. Boosting Visible‐Light‐Driven H
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Evolution of Covalent Triazine Framework from Water by Modifying Ni(II) Pyrimidine‐2‐thiolate Cocatalyst. ChemCatChem 2020. [DOI: 10.1002/cctc.202001631] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ze Xu
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P.R. China
| | - Yao Cui
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P.R. China
| | - Bin Guo
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P.R. China
| | - Hai‐Yan Li
- Analysis and Testing Center Soochow University Soochow University 215123 Suzhou P.R. China
| | - Hong‐Xi Li
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P.R. China
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17
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Yu S, Xing GL, Chen LH, Ben T, Su BL. Crystalline Porous Organic Salts: From Micropore to Hierarchical Pores. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003270. [PMID: 32930443 DOI: 10.1002/adma.202003270] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Crystalline porous organic salts (CPOSs), as an emerging class of porous organic materials, combining the uniform microporous system and distinct polarized channels, have become a highly evolving field of important current interest. The unique ionic bond of a CPOS endows the confined channels with high polarity, making CPOSs distinct from other organic frameworks. CPOSs show many fascinating properties, such as proton conductivity and fast transport of polar molecules, which involve the interaction between highly polarized guest molecules and host frameworks. Substantial progress has been made in the synthesis and applications of CPOSs. Herein, an overview is provided to impart a comprehensive understanding of the link between the synthetic approaches and the resultant microporous structure, the structure-function correlation and the state-of-the-art applications of CPOSs. The enhanced mass-transport performance of hierarchically porous structure in combination with the intrinsic polarized channels of CPOSs is very promising to create new applications and contribute to a new research upsurge. The perspective to construct porous hierarchy within the crystalline porous organic salts is assessed and will open a new research avenue. In the conclusion, the current challenges on the synthesis, structural regulation, and applications of CPOSs and the future of hierarchically porous crystalline organic salts are discussed.
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Affiliation(s)
- Shen Yu
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China
| | - Guo-Long Xing
- Department of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Li-Hua Chen
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China
| | - Teng Ben
- Department of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Bao-Lian Su
- Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, P. R. China
- CMI (Laboratory of Inorganic Materials Chemistry), University of Namur, 61 rue de Bruxelles, Namur, B-5000, Belgium
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18
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Kaizerman-Kane D, Hadar M, Tal N, Dobrovetsky R, Zafrani Y, Cohen Y. pH-Responsive Pillar[6]arene-based Water-Soluble Supramolecular Hexagonal Boxes. Angew Chem Int Ed Engl 2019; 58:5302-5306. [PMID: 30786135 DOI: 10.1002/anie.201900217] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/14/2019] [Indexed: 01/08/2023]
Abstract
We describe the preparation of the first water-soluble pH-responsive supramolecular hexagonal boxes (SHBs) based on multiple charge-assisted hydrogen bonds between peramino-pillar[6]arenes 2 with the molecular "lid" mellitic acid (1 a). The interaction between 2 and 1 a, as well as the other "lids" pyromellitic and trimesic acids (1 b and 1 c, respecively) were studied by a combination of experimental and computational methods. Interestingly, the addition of 1 a to the complexes of the protonated form of pillar[6]arene 2, that is, 3, with bis-sulfonate 4 a or 4 b, immediately led to guest escape along with the formation of closed 1 a2 2 supramolecular boxes. Moreover, the process of the openning and closing of the supramolecular boxes along with threading and escaping of the guests, respectively, was found to be reversible and pH-responsive. This study paves the way for the easy and modular preparation of different SHBs that may have myriad applications.
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Affiliation(s)
- Dana Kaizerman-Kane
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Maya Hadar
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Noam Tal
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Roman Dobrovetsky
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Yossi Zafrani
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel.,Department of Organic Chemistry, Israel Institute for Biological Research, Ness-Ziona, 740000, Israel
| | - Yoram Cohen
- School of Chemistry, Sackler Faculty of Exact sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
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19
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Kaizerman‐Kane D, Hadar M, Tal N, Dobrovetsky R, Zafrani Y, Cohen Y. pH‐Responsive Pillar[6]arene‐based Water‐Soluble Supramolecular Hexagonal Boxes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900217] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Dana Kaizerman‐Kane
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
| | - Maya Hadar
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
| | - Noam Tal
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
| | - Roman Dobrovetsky
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
| | - Yossi Zafrani
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
- Department of Organic ChemistryIsrael Institute for Biological Research Ness-Ziona 740000 Israel
| | - Yoram Cohen
- School of ChemistrySackler Faculty of Exact sciencesTel Aviv University Ramat Aviv 69978 Tel Aviv Israel
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20
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White NG. Recent advances in self-assembled amidinium and guanidinium frameworks. Dalton Trans 2019; 48:7062-7068. [DOI: 10.1039/c8dt05030a] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent advances in amidinium and guanidinium-containing hydrogen-bonded framework materials are highlighted.
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Affiliation(s)
- Nicholas G. White
- Research School of Chemistry
- The Australian National Univeristy
- Canberra
- Australia
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21
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Kimura M, Miyashita J, Miyagawa S, Kawasaki T, Takaya H, Tokunaga Y. Recognition Behavior of a Porphyrin Heterodimer Self-Assembled through an Amidinium-Carboxylate Salt Bridge. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800382] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Masaki Kimura
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Jyunichi Miyashita
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
| | - Tsuneomi Kawasaki
- Department of Applied Chemistry; Tokyo University of Science; Kagurazaka, Shinjuku-ku, Tokyo 162-8601 Japan
| | - Hikaru Takaya
- International Research Center for Elements Science, Institute for Chemical Research; Kyoto University; Uji 611-0011 Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo, Fukui 910-8507 Japan
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22
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Zafrani Y, Kaizerman D, Hadar M, Bigan N, Granot E, Ghosh M, Adler-Abramovich L, Patolsky F, Cohen Y. Pillararene-Based Two-Component Thixotropic Supramolecular Organogels: Complementarity and Multivalency as Prominent Motifs. Chemistry 2018; 24:15750-15755. [PMID: 29745993 DOI: 10.1002/chem.201801418] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/09/2018] [Indexed: 02/05/2023]
Abstract
Rationally designed two-component supramolecular organogels based on multiple chemical interactions between percarboxylato- and peramino-pillararenes are described. Mixing low concentration solutions (<1 % w/v) of decacarboxylato-pillar[5]arene (1) with decaamino-pillar[5]arenes (2 b-d) affords, rapidly and without heating, organogels displaying an exceptional combination of properties. These supramolecular organogels, the characteristics of which are tunable, were found to be thixotropic and thermally stable, with Tgel values in some cases exceeding the boiling point of the embedded solvent. It is demonstrated that both structural complementarity and multivalency are important determinants in the gelation process of these attractive soft materials.
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Affiliation(s)
- Yossi Zafrani
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel.,Department of Organic Chemistry, Israel Institute for Biological Research, Ness-Ziona, 740000, Israel
| | - Dana Kaizerman
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Maya Hadar
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Nitzan Bigan
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Eran Granot
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Moumita Ghosh
- Department of Oral Biology, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Lihi Adler-Abramovich
- Department of Oral Biology, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Fernando Patolsky
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Yoram Cohen
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
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23
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Morshedi M, Ward JS, Kruger PE, White NG. Supramolecular frameworks based on 5,10,15,20-tetra(4-carboxyphenyl)porphyrins. Dalton Trans 2018; 47:783-790. [DOI: 10.1039/c7dt04162d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen bonding is used to prepare porphyrin-containing supramolecular frameworks.
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Affiliation(s)
- Mahbod Morshedi
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Jas S. Ward
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Paul E. Kruger
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- School of Physical and Chemical Sciences
- University of Canterbury
- Christchurch 8140
- New Zealand
| | - Nicholas G. White
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
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