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Fragkiadakis M, Thomaidi M, Stergiannakos T, Chatziorfanou E, Gaidatzi M, Michailidis Barakat A, Stoumpos C, Neochoritis CG. High Rotational Barrier Atropisomers. Chemistry 2024; 30:e202401461. [PMID: 38962895 DOI: 10.1002/chem.202401461] [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: 04/15/2024] [Revised: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/05/2024]
Abstract
Atropisomers have attracted a great deal of attention lately due to their numerous applications in organic synthesis and to their employment in drug discovery. However, the synthetic arsenal at our disposal with which to access them remains limited. The research described herein is two-pronged; we both demonstrate the use of MCR chemistry as a synthetic strategy for the de novo synthesis of a class of atropisomers having high barriers to rotation with the simultaneous insertion of multiple chiral elements and we study these unprecedented molecular systems by employing a combination of crystallography, NMR and DFT calculations. By fully exploiting the synthetic capabilities of our chemistry, we have been able to monitor a range of different types of interaction, i. e. π-π, CH-π, heteroatom-π and CD-π, in order to conduct structure-property studies. The results could be applied both to atroposelective synthesis and in drug discovery.
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Affiliation(s)
| | - Maria Thomaidi
- Department of Chemistry, University of Crete, Voutes, Heraklion, 70013, Greece
| | | | | | - Maria Gaidatzi
- Department of Chemistry, University of Crete, Voutes, Heraklion, 70013, Greece
| | | | - Constantinos Stoumpos
- Department of Materials Science & Technology, University of Crete, Voutes, Heraklion, 70013, Greece
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2
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Ferraz Lobato L, Ciattini S, Gallo A, Allão Cassaro RA, Sorace L, Poneti G. Thermodynamics of spin crossover in a bis(terpyridine) cobalt(II) complex featuring a thioether functionality. Dalton Trans 2024; 53:9933-9941. [PMID: 38808660 DOI: 10.1039/d4dt00574k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
In this contribution, a terpyridine-based ligand bearing a thioether functionality is used to prepare a new cobalt(II) spin crossover complex: [Co(TerpyPhSMe)2](PF6)2 (1), where TerpyPhSMe is 4'-(4-methylthiophenyl)-2,2':6',2''-terpyridine. Its structure, determined by single crystal X-ray diffraction, reveals a mer coordination of the tridentate terpyridine ligands, leading to a tetragonally compressed octahedron. Intermolecular interactions in the crystal lattice freeze the complex in the high spin state in the solid state at all temperatures, as indicated by magnetometry and Electron Paramagnetic Resonance (EPR) spectra. When dissolved in acetonitrile, however, temperature dependent electronic, 1H-NMR and EPR spectra highlight an entropy-driven spin crossover transition, whose thermodynamics parameters have been determined. This is the first report of a cobalt(II) SCO complex featuring a thioether group, allowing its implementation in chemically grown bistable monolayers and may open important perspectives for the use of such systems in molecular spintronics.
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Affiliation(s)
- Lúcio Ferraz Lobato
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-909, Brazil
| | - Samuele Ciattini
- Interdepartmental Center for Crystallography (CRIST), University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Angelo Gallo
- Department of Chemistry, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
| | - Rafael A Allão Cassaro
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-909, Brazil
| | - Lorenzo Sorace
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Giordano Poneti
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-909, Brazil
- Dipartimento di Scienze Ecologiche e Biologiche, Università degli Studi della Tuscia, Largo dell'Università, 01100, Viterbo, Italy.
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3
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Kurfiřt M, Hamala V, Beránek J, Červenková Šťastná L, Červený J, Dračínský M, Bernášková J, Spiwok V, Bosáková Z, Bojarová P, Karban J. Synthesis and unexpected binding of monofluorinated N,N'-diacetylchitobiose and LacdiNAc to wheat germ agglutinin. Bioorg Chem 2024; 147:107395. [PMID: 38705105 DOI: 10.1016/j.bioorg.2024.107395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 05/07/2024]
Abstract
Fluorination of carbohydrate ligands of lectins is a useful approach to examine their binding profile, improve their metabolic stability and lipophilicity, and convert them into 19F NMR-active probes. However, monofluorination of monovalent carbohydrate ligands often leads to a decreased or completely lost affinity. By chemical glycosylation, we synthesized the full series of methyl β-glycosides of N,N'-diacetylchitobiose (GlcNAcβ(1-4)GlcNAcβ1-OMe) and LacdiNAc (GalNAcβ(1-4)GlcNAcβ1-OMe) systematically monofluorinated at all hydroxyl positions. A competitive enzyme-linked lectin assay revealed that the fluorination at the 6'-position of chitobioside resulted in an unprecedented increase in affinity to wheat germ agglutinin (WGA) by one order of magnitude. For the first time, we have characterized the binding profile of a previously underexplored WGA ligand LacdiNAc. Surprisingly, 4'-fluoro-LacdiNAc bound WGA even stronger than unmodified LacdiNAc. These observations were interpreted using molecular dynamic calculations along with STD and transferred NOESY NMR techniques, which gave evidence for the strengthening of CH/π interactions after deoxyfluorination of the side chain of the non-reducing GlcNAc. These results highlight the potential of fluorinated glycomimetics as high-affinity ligands of lectins and 19F NMR-active probes.
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Affiliation(s)
- Martin Kurfiřt
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 1/135, CZ-165 00 Praha 6, Czech Republic; University of Chemistry and Technology, Technická 5, CZ-166 28 Praha 6, Czech Republic
| | - Vojtěch Hamala
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 1/135, CZ-165 00 Praha 6, Czech Republic; University of Chemistry and Technology, Technická 5, CZ-166 28 Praha 6, Czech Republic
| | - Jan Beránek
- University of Chemistry and Technology, Technická 5, CZ-166 28 Praha 6, Czech Republic
| | - Lucie Červenková Šťastná
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 1/135, CZ-165 00 Praha 6, Czech Republic
| | - Jakub Červený
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-142 00 Praha 4, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-128 43 Praha 2, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo Náměstí 542/2, CZ-160 00 Praha 6, Czech Republic
| | - Jana Bernášková
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 1/135, CZ-165 00 Praha 6, Czech Republic
| | - Vojtěch Spiwok
- University of Chemistry and Technology, Technická 5, CZ-166 28 Praha 6, Czech Republic
| | - Zuzana Bosáková
- Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, CZ-128 43 Praha 2, Czech Republic
| | - Pavla Bojarová
- Laboratory of Biotransformation, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-142 00 Praha 4, Czech Republic
| | - Jindřich Karban
- Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 1/135, CZ-165 00 Praha 6, Czech Republic.
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4
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Seo YH, Baik S, Lee J. Nanopore surface engineering of molecular imprinted mesoporous organosilica for rapid and selective detection of L-thyroxine. Colloids Surf B Biointerfaces 2024; 234:113711. [PMID: 38128361 DOI: 10.1016/j.colsurfb.2023.113711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/25/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
To develop a biosensing platform for precise diagnosis and management of thyroid-related diseases, the sensitive and selective recognition and identification of L-thyroxine (T4), a thyroid hormone, remains challenging. We herein introduce T4-imprinted mesoporous organosilica (T4-IMO) for sensitive and specific detection of T4 via the sophisticated engineering of pore surfaces using additives with different polarities. The pore surface of T4-IMO emitting a stable fluorescence signal is simply modified by fixed additives. Additives embedded in the pore surface promote the rebinding response of T4 into the recognized cavities, subsequently sensitizing T4 detection. Notably, T4-IMO containing abundant fluorine elements on the pore surface shows a high affinity toward T4, remarkably boosting the rebinding capacity. In addition to good selectivity to T4, the "turn-off" fluorescent signal exhibits a linear relationship with the logarithm of T4 concentration in a range of 0-500 nM with a detection limit of 0.47 nM in synthetic urine samples. Our findings can establish an insightful strategy for the rational design of molecular-recognition-based sensor systems for the selective and sensitive detection of target analytes.
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Affiliation(s)
- Young Hun Seo
- Biosensor Group, Korea Institute of Science and Technology Europe, Campus E7.1, Saarbrücken, Germany.
| | - Seungyun Baik
- Environmental Safety Group, Korea Institute of Science and Technology Europe, Campus E7.1, Saarbrücken, Germany
| | - Jaeho Lee
- Biosensor Group, Korea Institute of Science and Technology Europe, Campus E7.1, Saarbrücken, Germany
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Wang Y, Ye S, Sun Z, Zhu J, Liu Y, Wang R, Lin F, Zhang W, Yang Y, Wang C. Multifunctional Regioisomeric Passivation Strategy for Fabricating Self-Driving, High Detectivity All-Inorganic Perovskite Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2023; 15:59005-59015. [PMID: 38055857 DOI: 10.1021/acsami.3c12714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The fluorination of the aromatic multifunctional Lewis base passivation strategy has been demonstrated recently as an effective approach to markedly enhance the performance of perovskite photovoltaic devices. However, the regulation mechanisms of the passivation efficiency by varying the functional group position of fluorine (F) in the regioisomers have received little attention and inadequate research. Herein, a pair of bifluorine-substituted aminobenzoic acid regioisomers [3-amino-2,6-difluorobenzoic acid (13-FABA) and 4-amino-3,5-difluorobenzoic acid (14-FABA)] were employed to investigate the passivation effects of Lewis bases dependent on behaviors of the ortho/meta-substituted position of fluorine. The density functional theory calculation on electron cloud density, interaction energy, and the basicity of Lewis bases combined with experimental evidence reveal that the ortho-effect induced by fluorine substitution weakens the passivating effect of 13-FABA Lewis base and induces its molecular propensity to form internal salts, accelerating the degradation and deterioration of the device performance. Conversely, 14-FABA with meta-connected fluorine atoms exhibit superior efficacy in suppressing defects and enhancing hydrophobicity. Eventually, the 14-FABA-modified photodetectors (PDs) achieved a high detectivity of 1.69 × 1013 Jones, the comparatively lower dark current density of 2.2 × 10-10 A/cm2 among all-inorganic perovskite PD systems. Our work has not only clarified the fundamental mechanisms of the F-substituted position effects of Lewis base on suppressing defects but also provided a promising passivation strategy for perovskite films via designing the regioisomeric atoms in a multifunctional Lewis base molecule.
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Affiliation(s)
- Yong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Shuming Ye
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Ziwei Sun
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Jiajun Zhu
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Ye Liu
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Rongfei Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Feng Lin
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Wenhua Zhang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Yu Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
| | - Chong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, P. R. China
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6
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Gravillier LA, Cockroft SL. Context-Dependent Significance of London Dispersion. Acc Chem Res 2023; 56:3535-3544. [PMID: 37994023 DOI: 10.1021/acs.accounts.3c00625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
ConspectusLondon forces constitute an attractive component of van der Waals interactions and originate from transient correlated momentary dipoles in adjacent atoms. The in-depth investigation of London dispersion forces poses notable challenges, especially in solution, owing to their inherently weak and competing character. Our objective in this Account is to shed light on the context-dependent significance of London dispersion forces by contrasting our own experimental findings with those from other research endeavors. Specifically, we will explore how factors such as the choice of system and solvent can influence the apparent role of London dispersion forces in molecular recognition processes. We initiate our Account by scrutinizing the Wilcox balance, which has yielded diverse and occasionally contradictory results. Following that, we provide an overview of the role of London dispersion forces and their context-dependent variations, encompassing alkyl-alkyl, halogen-π, alkyl-π, and aromatic stacking interactions.Several experimental investigations have revealed how difficult it is to measure the significance of London dispersion in solution. Indeed, dispersion forces seldom act as the exclusive driving force in molecular recognition processes, and solvation energetics also strongly influence equilibria and kinetics. Molecular balances that bring apolar functional groups into contact have proven to be instrumental in the experimental measurement of dispersion. The intramolecular approach avoids the need to pay the entropic cost of bringing interacting groups into contact, while also enabling solvent screening. Such experimental studies have found dispersion interactions between functional groups to be very weak (<5 kJ mol-1), meaning that they frequently take backstage to electrostatic contributions and solvophobic effects and are readily damped by competitive dispersion interactions with the solvent. By using such approaches, competitive dispersion interactions with the solvent have been shown to be described by the bulk polarizability of the solvent (perfluoroalkanes have the lowest bulk polarizabilities, while carbon disulfide has one of the highest). Dispersion interactions are also strongly distance-dependent, which results in considerable context-dependent outcomes across different investigations. For example, we caution against the risk of attributing the stability of a "more sterically hindered" isomer as arising from intramolecular dispersion forces. The total energy of the system can reveal other contributions to stability, such as nonintuitive minimization of strain elsewhere in the molecule. Indeed, the delicate distance-dependent balance between sterics and London dispersion means that even subtle changes in size and geometry can lead to disparate behavior. Similarly, solvophobic effects also contribute to stabilizing contacts between bulky functional groups, which can be revealed if there is a correlation with the cohesive energy density of the solvent.
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Affiliation(s)
- Louis-Albin Gravillier
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Scott L Cockroft
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
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7
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Burmistrov VV, Morisseau C, Danilov DV, Gladkikh BP, D’yachenko VS, Zefirov NA, Zefirova ON, Butov GM, Hammock BD. Fluorine and chlorine substituted adamantyl-urea as molecular tools for inhibition of human soluble epoxide hydrolase with picomolar efficacy. J Enzyme Inhib Med Chem 2023; 38:2274797. [PMID: 37975322 PMCID: PMC11003477 DOI: 10.1080/14756366.2023.2274797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/16/2023] [Indexed: 11/19/2023] Open
Abstract
Series of 1,3-disubstituted ureas and diadamantyl disubstituted diureas with fluorinated and chlorinated adamantane residues were shown to inhibit human soluble epoxide hydrolase (sEH) with inhibition potency ranging from 40 pM to 9.2 nM. The measured IC50 values for some molecules were below the accuracy limit of the existing in vitro assays. Such an increase in activity was achieved by minimal structural modifications to the molecules of known inhibitors, including 4-[trans-4-(1-adamantylcarbamoylamino)cyclohexyl]oxybenzoic acid. For the chlorinated homologue of the latter the sharp jump in inhibitory activity can be (according to molecular dynamics data) the result of interactions - Cl-π interaction. Considering the extremely high inhibitory activity, acceptable solubility and partial blockage of metabolically sensitive centres in their structures, some compounds are of interest for further in vivo biotesting.
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Affiliation(s)
- Vladimir V. Burmistrov
- Volgograd State Technical University, Volgograd, Russia
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, Russia
| | - Christophe Morisseau
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | | | | | - Vladimir S. D’yachenko
- Volgograd State Technical University, Volgograd, Russia
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Nikolay A. Zefirov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - Olga N. Zefirova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow, Russia
| | - Gennady M. Butov
- Volgograd State Technical University, Volgograd, Russia
- Department of Chemistry, Technology and Equipment of Chemical Industry, Volzhsky Polytechnic Institute (branch) Volgograd State Technical University, Volzhsky, Russia
| | - Bruce D. Hammock
- Department of Entomology and Nematology, and Comprehensive Cancer Center, University of California, Davis, CA, USA
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Guo L, Tian M, Li Z, Wang Q, Wu Q, Hao L, Wang C. Preparation of hypercrosslinked porous polymer with manifold functional groups for sensitive determination of phenylurea herbicides in beverages and celtuce samples. Food Chem 2023; 427:136674. [PMID: 37385066 DOI: 10.1016/j.foodchem.2023.136674] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/09/2023] [Accepted: 06/18/2023] [Indexed: 07/01/2023]
Abstract
Wide use of phenylurea herbicide has caused serious residue problem and threaten human health. It is important to develop viable method for their sensitive determination. Herein, a multi-functionalized porous polymer was prepared by crosslinking hexafluorobisphenol A with pyromellitic dianhydride. Using the multi-functionalized porous polymer as solid phase extraction sorbent, combined with high performance liquid chromatography, a sensitive method was established for determining phenylurea herbicides in beverages and celtuces. High sensitivity was achieved, with method detection limit (S/N = 3) of 0.01---0.025 ng mL-1 for beverages, 1.70 ng g-1 for celtuce, and quantitation limits of 0.03---0.10 ng mL-1 for beverages, 5.00 ng g-1 for celtuce. The method recoveries were 80.5---120.0 % with relative standard deviations lower than 6.1%. Adsorption mechanism mainly involved F-π, F-O, π-π, polar interactions and hydrogen-bonding interactions. This study offers a simple protocol to develop multi-functional sorbents for extraction of organic pollutants.
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Affiliation(s)
- Linna Guo
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, China
| | - Miao Tian
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Li
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Qianqian Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Qiuhua Wu
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Lin Hao
- College of Science, Hebei Agricultural University, Baoding 071001, China.
| | - Chun Wang
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, China; College of Science, Hebei Agricultural University, Baoding 071001, China.
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Usui K, Amano A, Murayama K, Sasaya M, Kusumoto R, Umeno T, Murase S, Iizuka N, Matsumoto S, Fuchi Y, Takahashi K, Kawahata M, Kobori Y, Karasawa S. Photoisomerization of "Partially Embedded Dihydropyridazine" with a Helical Structure. Chemistry 2023; 29:e202302413. [PMID: 37612241 DOI: 10.1002/chem.202302413] [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: 07/26/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 08/25/2023]
Abstract
Herein, we report the synthesis of two "partially embedded fused-dihydropyridazine N-aryl aza[5]helicene derivatives" (PDHs) and the demonstration of their intrinsic photo-triggered multi-functional properties based on a Kekulé biradical structure. Introducing bulky electron-withdrawing trifluoromethyl or pentafluoroethyl groups into the aza[5]helicene framework (PDH-CF3 and -C2 F5 ) gives PDH axial chirality based on the helicity of the P and M forms, even at room temperature. Upon photo-irradiation of PDH-CF3 in a frozen solution, an ESR signal from the triplet biradical with zero-field splitting values, generated by N-N bond dissociation, was observed. However, when the irradiation was turned off, the ESR signal became silent, thus indicating the existence of two equilibria: between the biradical and quinoidal forms based on the Kekulé structure, and between N-N bond cleavage and recombination. The observed photo- and thermally induced behaviors indicate that T-type photochromic molecules are involved in the photoisomerization mechanism involving the two equilibria. Inspired by the photoisomerization, chirality control of PDH by photoracemization was achieved. Multiple functionalities, such as T-type photochromism, photo-excitation-mediated triplet biradical formation, and photoracemization, which are attributed to the "partially embedded dihydropyridazine" structure, are demonstrated.
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Affiliation(s)
- Kazuteru Usui
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Ami Amano
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Kasumi Murayama
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Miho Sasaya
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Ryota Kusumoto
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Tomohiro Umeno
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Satsuki Murase
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Naoko Iizuka
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Shota Matsumoto
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Yasufumi Fuchi
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Kazuyuki Takahashi
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Masatoshi Kawahata
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Yasuhiro Kobori
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
- Molecular Photoscience Research Center, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Satoru Karasawa
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
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10
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West AML, Dominelli‐Whiteley N, Smolyar IV, Nichol GS, Cockroft SL. Experimental Quantification of Halogen⋅⋅⋅Arene van der Waals Contacts. Angew Chem Int Ed Engl 2023; 62:e202309682. [PMID: 37470309 PMCID: PMC10953438 DOI: 10.1002/anie.202309682] [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: 07/07/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/21/2023]
Abstract
Crystallographic and computational studies suggest the occurrence of favourable interactions between polarizable arenes and halogen atoms. However, the systematic experimental quantification of halogen⋅⋅⋅arene interactions in solution has been hindered by the large variance in the steric demands of the halogens. Here we have synthesized molecular balances to quantify halogen⋅⋅⋅arene contacts in 17 solvents and solvent mixtures using 1 H NMR spectroscopy. Calculations indicate that favourable halogen⋅⋅⋅arene interactions arise from London dispersion in the gas phase. In contrast, comparison of our experimental measurements with partitioned SAPT0 energies indicate that dispersion is sufficiently attenuated by the solvent that the halogen⋅⋅⋅arene interaction trend was instead aligned with increasing exchange repulsion as the halogen increased in size (ΔGX ⋅⋅⋅Ph =0 to +1.5 kJ mol-1 ). Halogen⋅⋅⋅arene contacts were slightly less disfavoured in solvents with higher solvophobicities and lower polarizabilities, but strikingly, were always less favoured than CH3 ⋅⋅⋅arene contacts (ΔGMe ⋅⋅⋅Ph =0 to -1.4 kJ mol-1 ).
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Affiliation(s)
- Andrew M. L. West
- EaStCHEM School of ChemistryUniversity of Edinburgh Joseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Nicholas Dominelli‐Whiteley
- EaStCHEM School of ChemistryUniversity of Edinburgh Joseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Ivan V. Smolyar
- EaStCHEM School of ChemistryUniversity of Edinburgh Joseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Gary S. Nichol
- EaStCHEM School of ChemistryUniversity of Edinburgh Joseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Scott L. Cockroft
- EaStCHEM School of ChemistryUniversity of Edinburgh Joseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
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11
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19F NMR Chemical Shifts Are Sensitive to Remote Functional Group Variations. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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12
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Smajlagic I, Johnston JN, Dudding T. Secondary Orbital Effect Involving Fluorine is Responsible for Substrate-Controlled Diastereodivergence in the Catalyzed syn-aza-Henry Reaction of α-Fluoronitroalkanes. Chemistry 2023; 29:e202204066. [PMID: 36607705 DOI: 10.1002/chem.202204066] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/07/2023]
Abstract
The fluorine atom is a powerful, yet enigmatic influence on chemical reactions. True to form, fluorine was recently discovered to effect diastereodivergence in an enantioselective aza-Henry reaction, resulting in a very rare case of syn-β-amino nitroalkane products. More bewildering was the observation of an apparent hierarchy of substituents within this substrate-controlled behavior: Ph>F>alkyl. These cases have now been examined comprehensively by computational methods, including both non-fluorinated and α-fluoro nitronate additions to aldimines catalyzed by a chiral bis(amidine) [BAM] proton complex. This study revealed the network of non-covalent interactions that dictate anti- (α-aryl) versus syn-selectivity (α-alkyl) using α-fluoronitronate nucleophiles, and an underlying secondary orbital interaction between fluorine and the activated azomethine.
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Affiliation(s)
- Ivor Smajlagic
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St., Catharines, ON L2S 3A1, Canada
| | - Jeffrey N Johnston
- Department of Chemistry and Institute of Chemical Biology, Vanderbilt University Nashville, Tennessee, 37235, USA
| | - Travis Dudding
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St., Catharines, ON L2S 3A1, Canada
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13
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Lu Y, Sun M, Xi N. Effects of fluorine bonding and nonbonding interactions on 19F chemical shifts. RSC Adv 2022; 12:32082-32096. [PMID: 36415555 PMCID: PMC9644289 DOI: 10.1039/d2ra06660b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 10/25/2022] [Indexed: 11/03/2023] Open
Abstract
19F-NMR signals are sensitive to local electrostatic fields and are useful in probing protein structures and dynamics. Here, we used chemically identical ortho-F nuclei in N-phenyl γ-lactams to investigate the relationship between 19F NMR chemical shifts and local environments. By varying the structures at the C5- and C7-substituents, we demonstrated that 19F shifts and Hammett coefficients in Hammett plots follow typical relationships in bonding interactions, while manifesting reverse correlations in nonbonding contacts. Quantum mechanics calculations revealed that one of the ortho-F nuclei engages in n → π* orbital delocalization between F lone pair electrons (n) and a C[double bond, length as m-dash]O/Ar[double bond, length as m-dash]N antibonding orbital (π*), and the other ortho-F nucleus exhibits n ↔ σ orbital polarization between the n electrons and the C-H σ bonding orbital. As 19F NMR spectroscopy find increasing use in molecular sensors and biological sciences, our findings are valuable for designing sensitive probes, elucidating molecular structures, and quantifying analytes.
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Affiliation(s)
- Yang Lu
- Institute of Drug Discovery Technology, Ningbo University Ningbo Zhejiang 315211 P. R. China
| | - Mingming Sun
- Department of Chemistry, Nanchang University 999 Xuefu Avenue Nanchang 330031 P. R. China
| | - Ning Xi
- Institute of Drug Discovery Technology, Ningbo University Ningbo Zhejiang 315211 P. R. China
- School of Medicine, Ningbo University Ningbo Zhejiang 315211 P. R. China
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14
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Elkina NA, Grishchenko MV, Shchegolkov EV, Makhaeva GF, Kovaleva NV, Rudakova EV, Boltneva NP, Lushchekina SV, Astakhova TY, Radchenko EV, Palyulin VA, Zhilina EF, Perminova AN, Lapshin LS, Burgart YV, Saloutin VI, Richardson RJ. New Multifunctional Agents for Potential Alzheimer's Disease Treatment Based on Tacrine Conjugates with 2-Arylhydrazinylidene-1,3-Diketones. Biomolecules 2022; 12:1551. [PMID: 36358901 PMCID: PMC9687805 DOI: 10.3390/biom12111551] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/11/2022] [Accepted: 10/17/2022] [Indexed: 11/29/2023] Open
Abstract
Alzheimer's disease (AD) is considered a modern epidemic because of its increasing prevalence worldwide and serious medico-social consequences, including the economic burden of treatment and patient care. The development of new effective therapeutic agents for AD is one of the most urgent and challenging tasks. To address this need, we used an aminoalkylene linker to combine the well-known anticholinesterase drug tacrine with antioxidant 2-tolylhydrazinylidene-1,3-diketones to create 3 groups of hybrid compounds as new multifunctional agents with the potential for AD treatment. Lead compounds of the new conjugates effectively inhibited acetylcholinesterase (AChE, IC50 0.24-0.34 µM) and butyrylcholinesterase (BChE, IC50 0.036-0.0745 µM), with weak inhibition of off-target carboxylesterase. Anti-AChE activity increased with elongation of the alkylene spacer, in agreement with molecular docking, which showed compounds binding to both the catalytic active site and peripheral anionic site (PAS) of AChE, consistent with mixed type reversible inhibition. PAS binding along with effective propidium displacement suggest the potential of the hybrids to block AChE-induced β-amyloid aggregation, a disease-modifying effect. All of the conjugates demonstrated metal chelating ability for Cu2+, Fe2+, and Zn2+, as well as high antiradical activity in the ABTS test. Non-fluorinated hybrid compounds 6 and 7 also showed Fe3+ reducing activity in the FRAP test. Predicted ADMET and physicochemical properties of conjugates indicated good CNS bioavailability and safety parameters acceptable for potential lead compounds at the early stages of anti-AD drug development.
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Affiliation(s)
- Natalia A. Elkina
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Maria V. Grishchenko
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Evgeny V. Shchegolkov
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Galina F. Makhaeva
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Nadezhda V. Kovaleva
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Elena V. Rudakova
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Natalia P. Boltneva
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Sofya V. Lushchekina
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
- Emanuel Institute of Biochemical Physics Russian Academy of Sciences, Moscow 119334, Russia
| | - Tatiana Y. Astakhova
- Emanuel Institute of Biochemical Physics Russian Academy of Sciences, Moscow 119334, Russia
| | - Eugene V. Radchenko
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Vladimir A. Palyulin
- Institute of Physiologically Active Compounds at Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka 142432, Russia
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Ekaterina F. Zhilina
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Anastasiya N. Perminova
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Luka S. Lapshin
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Yanina V. Burgart
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Victor I. Saloutin
- Postovsky Institute of Organic Synthesis, Urals Branch of Russian Academy of Sciences, Yekaterinburg 620990, Russia
| | - Rudy J. Richardson
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Center of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA
- Michigan Institute for Computational Discovery and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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15
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Fu Q, Liu H, Li S, Zhou T, Chen M, Yang Y, Wang J, Wang R, Chen Y, Liu Y. Management of Donor and Acceptor Building Blocks in Dopant‐Free Polymer Hole Transport Materials for High‐Performance Perovskite Solar Cells. Angew Chem Int Ed Engl 2022; 61:e202210356. [DOI: 10.1002/anie.202210356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Qiang Fu
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Hang Liu
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Shitong Li
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Tong Zhou
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Mingqian Chen
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Yang Yang
- The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources (Tianjin) Tianjin 300192 P. R. China
| | - Jian Wang
- The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources (Tianjin) Tianjin 300192 P. R. China
| | - Rui Wang
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
| | - Yongsheng Chen
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China
| | - Yongsheng Liu
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China
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16
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Fu Q, Liu H, Li S, Zhou T, Chen M, Yang Y, Wang J, Wang R, Chen Y, Liu Y. Management of Donor and Acceptor Building Blocks in Dopant‐Free Polymer Hole Transport Materials for High‐Performance Perovskite Solar Cells. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210356] [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)
- Qiang Fu
- Nankai University College of Chemsitry CHINA
| | - Hang Liu
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Shitong Li
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Tong Zhou
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Mingqian Chen
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Yang Yang
- The Institute of Seawater Desalination and Multipurpose Utilization The Institute of Seawater Desalination and Multipurpose Utilization CHINA
| | - Jian Wang
- The Institute of Seawater Desalination and Multipurpose Utilization The Institute of Seawater Desalination and Multipurpose Utilization CHINA
| | - Rui Wang
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Yongsheng Chen
- Nankai University College of Chemsitry Nankai University 300071 Tianjin CHINA
| | - Yongsheng Liu
- Nankai University College of Chemistry 94 Weijin Road, Mengmingwei Building 300071 Tianjin CHINA
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17
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Cáceres-Castillo D, Mirón-López G, García-López M, Chan-Navarro R, Quijano-Quiñones R, Briceño-Vargas F, Cauich-Kumul R, Morales-Rojas H, Herrera-España A. Boronate Derivatives of Damnacanthal: Synthesis, Characterization, Optical Properties and Theoretical Calculations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Liu N, Lv X, Xiao B, Kuzuhara D, Mei P, Aratani N, Yamada H, Qiu F, Pan J, Xue S. A porphyrin(2.1.2.1) bis-boron complex as a deep-red AIE luminophore induced by intermolecular F-π interaction. Dalton Trans 2022; 51:9606-9610. [PMID: 35687010 DOI: 10.1039/d2dt01289h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mono-/diboron complexes with saddle-shaped molecular conformations were synthesized from porphyrins(2.1.2.1). The boron complexes have unique structure-dependent photophysical properties: (a) monoboron complexes 2a and 2b are not emissive in solution and the solid state, (b) diboron complex 3a shows red emission in toluene, and (c) diboron complex 3b shows aggregation-induced emission (AIE) in the deep-red region due to intermolecular secondary interactions (F-π). This is the first case of a boron porphyrinoid complex that shows AIE emission in the deep-red region in decades.
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Affiliation(s)
- Ningchao Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Xiaojuan Lv
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Bentian Xiao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Daiki Kuzuhara
- Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan.
| | - Peifeng Mei
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Naoki Aratani
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Hiroko Yamada
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Fengxian Qiu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Jianming Pan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Songlin Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
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19
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Yao Z, Zhang F, He L, Bi X, Guo Y, Guo Y, Wang L, Wan X, Chen Y, Sun L. Pyrene-Based Dopant-Free Hole-Transport Polymers with Fluorine-Induced Favorable Molecular Stacking Enable Efficient Perovskite Solar Cells. Angew Chem Int Ed Engl 2022; 61:e202201847. [PMID: 35304803 PMCID: PMC9324121 DOI: 10.1002/anie.202201847] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Indexed: 12/19/2022]
Abstract
A new class of polymeric hole-transport materials (HTMs) are explored by inserting a two-dimensionally conjugated fluoro-substituted pyrene into thiophene and selenophene polymeric chains. The broad conjugated plane of pyrene and "Lewis soft" selenium atoms not only enhance the π-π stacking of HTM molecules greatly but also render a strong interaction with the perovskite surface, leading to an efficient charge transport/transfer in both the HTM layer and the perovskite/HTM interface. Note that fluorine substitution adjacent to pyrene boosts the stacking of HTMs towards a more favorable face-on orientation, further facilitating the efficient charge transport. As a result, perovskite solar cells (PSCs) employing PE10 as dopant-free HTM afford an excellent efficiency of 22.3 % and the dramatically enhanced device longevity, qualifying it among the best PSCs based on dopant-free HTMs.
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Affiliation(s)
- Zhaoyang Yao
- Key Laboratory of Functional Polymer MaterialsCollege of Chemistry, Nankai UniversityTianjin300071China
- Department of ChemistryOrganic ChemistryKTH Royal Institute of TechnologyStockholm10044Sweden
| | - Fuguo Zhang
- Department of ChemistryOrganic ChemistryKTH Royal Institute of TechnologyStockholm10044Sweden
| | - Lanlan He
- Department of ChemistryApplied Physical ChemistryKTH Royal Institute of TechnologyStockholm10044Sweden
| | - Xingqi Bi
- Key Laboratory of Functional Polymer MaterialsCollege of Chemistry, Nankai UniversityTianjin300071China
| | - Yaxiao Guo
- Department of ChemistryOrganic ChemistryKTH Royal Institute of TechnologyStockholm10044Sweden
- State Key Laboratory of Separation Membranes and Membrane ProcessesSchool of ChemistryTiangong UniversityTianjin300387China
| | - Yu Guo
- Center of Artificial Photosynthesis for Solar FuelsSchool of ScienceWestlake UniversityHangzhou310024China
| | - Linqin Wang
- Center of Artificial Photosynthesis for Solar FuelsSchool of ScienceWestlake UniversityHangzhou310024China
| | - Xiangjian Wan
- Key Laboratory of Functional Polymer MaterialsCollege of Chemistry, Nankai UniversityTianjin300071China
| | - Yongsheng Chen
- Key Laboratory of Functional Polymer MaterialsCollege of Chemistry, Nankai UniversityTianjin300071China
| | - Licheng Sun
- Department of ChemistryOrganic ChemistryKTH Royal Institute of TechnologyStockholm10044Sweden
- Center of Artificial Photosynthesis for Solar FuelsSchool of ScienceWestlake UniversityHangzhou310024China
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20
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Deng S, Park JE, Kang G, Guan J, Li R, Schatz GC, Odom TW. Interfacial engineering of plasmonic nanoparticle metasurfaces. Proc Natl Acad Sci U S A 2022; 119:e2202621119. [PMID: 35605124 PMCID: PMC9295783 DOI: 10.1073/pnas.2202621119] [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: 02/12/2022] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
SignificanceMolecules interacting with metallic nanostructures can show tunable exciton-plasmon coupling, ranging from weak to strong. One factor that influences the interactions is the spatial organization of the molecules relative to the localized plasmon-enhanced electromagnetic fields. In this work, we show that the arrangement of aromatic dye molecules can be tuned within plasmonic hotspots by interfacial engineering of nanoparticle surfaces. By controlling the local chemical and physical interactions, we could modulate lasing thresholds. Surface-functionalized plasmonic metasurfaces open prospects for programmable light-matter interactions at the nanoscale.
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Affiliation(s)
- Shikai Deng
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jeong-Eun Park
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Gyeongwon Kang
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jun Guan
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Ran Li
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
| | - George C. Schatz
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Teri W. Odom
- Department of Chemistry, Northwestern University, Evanston, IL 60208
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
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21
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Bao RLY, Shi L, Fu K. Highly enantioselective construction of CF3-bearing all-carbon quaternary stereocenters: Chiral spiro-fused bisoxazoline ligands with 1,1′-binaphthyl sidearm for asymmetric Michael-type Friedel-Crafts reaction. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.10.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Yao Z, Zhang F, He L, Bi X, Guo Y, Guo Y, Wang L, Wan X, Chen Y, Sun L. Pyrene‐Based Dopant‐Free Hole‐Transport Polymers with Fluorine Induced Favorable Molecular Stacking Enable Efficient Perovskite Solar Cells. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201847] [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)
| | - Fuguo Zhang
- KTH Royal Institute of Technology: Kungliga Tekniska Hogskolan Chemistry SWEDEN
| | - Lanlan He
- KTH Royal Institute of Technology: Kungliga Tekniska Hogskolan Chemistry SWEDEN
| | | | | | - Yu Guo
- Westlake University School of Science CHINA
| | | | | | | | - Licheng Sun
- Westlake University Department of Chemistry Shilongshanjie 18Westlake University 310024 Hangzhou CHINA
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23
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Islam MS, Junod SL, Zhang S, Buuh ZY, Guan Y, Zhao M, Kaneria KH, Kafley P, Cohen C, Maloney R, Lyu Z, Voelz VA, Yang W, Wang RE. Unprotected peptide macrocyclization and stapling via a fluorine-thiol displacement reaction. Nat Commun 2022; 13:350. [PMID: 35039490 PMCID: PMC8763920 DOI: 10.1038/s41467-022-27995-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/19/2021] [Indexed: 12/31/2022] Open
Abstract
We report the discovery of a facile peptide macrocyclization and stapling strategy based on a fluorine thiol displacement reaction (FTDR), which renders a class of peptide analogues with enhanced stability, affinity, cellular uptake, and inhibition of cancer cells. This approach enabled selective modification of the orthogonal fluoroacetamide side chains in unprotected peptides in the presence of intrinsic cysteines. The identified benzenedimethanethiol linker greatly promoted the alpha helicity of a variety of peptide substrates, as corroborated by molecular dynamics simulations. The cellular uptake of benzenedimethanethiol stapled peptides appeared to be universally enhanced compared to the classic ring-closing metathesis (RCM) stapled peptides. Pilot mechanism studies suggested that the uptake of FTDR-stapled peptides may involve multiple endocytosis pathways in a distinct pattern in comparison to peptides stapled by RCM. Consistent with the improved cell permeability, the FTDR-stapled lead Axin and p53 peptide analogues demonstrated enhanced inhibition of cancer cells over the RCM-stapled analogues and the unstapled peptides. Strategies capable of stapling unprotected peptides in a straightforward, chemoselective, and clean manner, as well as promoting cellular uptake are of great interest. Here the authors report a peptide macrocyclization and stapling strategy which satisfies those criteria, based on a fluorine thiol displacement reaction.
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Affiliation(s)
- Md Shafiqul Islam
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Samuel L Junod
- Department of Biology, Temple University, 1900 N. 12th Street, Philadelphia, PA, 19122, USA
| | - Si Zhang
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Zakey Yusuf Buuh
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Yifu Guan
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Mi Zhao
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Kishan H Kaneria
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Parmila Kafley
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Carson Cohen
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Robert Maloney
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Zhigang Lyu
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Vincent A Voelz
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA
| | - Weidong Yang
- Department of Biology, Temple University, 1900 N. 12th Street, Philadelphia, PA, 19122, USA
| | - Rongsheng E Wang
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
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24
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Yamada S, Kobayashi K, Morita M, Konno T. D–π–A-type fluorinated tolanes with a diphenylamino group: crystal polymorphism formation and photophysical behavior. CrystEngComm 2022. [DOI: 10.1039/d1ce01671g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ph2N-Substituted fluorinated tolanes produced two polymorphisms, which display a distinct photoluminescence behavior; one polymorphism showed green PL and the other exhibited yellow PL.
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Affiliation(s)
- Shigeyuki Yamada
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kazuki Kobayashi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masato Morita
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tsutomu Konno
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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25
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Yamada S, Sato M, Uto E, Kataoka M, Morita M, Konno T. Fluorinated tolane-based fluorophores bearing a branched flexible unit with aggregation-induced emission enhancement characteristics. NEW J CHEM 2022. [DOI: 10.1039/d1nj05822c] [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
Precise molecular design of fluorinated tolane-based fluorophores can control both the electron density and molecular aggregated structures.
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Affiliation(s)
- Shigeyuki Yamada
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masaya Sato
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Eiji Uto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Mitsuki Kataoka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masato Morita
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tsutomu Konno
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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26
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Pietrzak A, Guschlbauer J, Kaszyński P. Structure of a Fe 4O 6-Heteraadamantane-Type Hexacation Stabilized by Chelating Organophosphine Oxide Ligands. MATERIALS 2021; 14:ma14226840. [PMID: 34832242 PMCID: PMC8617765 DOI: 10.3390/ma14226840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/05/2021] [Accepted: 11/09/2021] [Indexed: 11/16/2022]
Abstract
Metal-containing heteraadamantanes are compounds of interest due to their spectroscopic and magnetic properties, which make them promising materials for non-linear optics and semiconductors. Herein we report the comprehensive structural characterization of a new coordination compound of the formula [(µ-OH′)2(µ-OH″)4(O = P(Ph2)CH2CH2(Ph2)P = O)4{Fe(t-BuOH)}4](PF6)4(Cl)2 with the chelating ligand Ph2P(O)-CH2CH2-P(O)Ph2. The compound crystallizes as a polynuclear metal complex with the adamantane-like core [Fe4O6] in the space group I-43d of a cubic system. The single-crystal XRD analysis showed that the crystal contains one symmetrically independent octahedrally coordinated Fe atom in the oxidation state +3. The adamantine-like scaffold of the Fe complex is formed by hydroxy bridging oxygen atoms only. Hirshfeld surface analysis of the bridging oxygen atoms revealed two types of µ-OH groups, which differ in the degree of exposure and participation in long-range interactions. Additionally, the Hirshfeld surface analysis supported by the enrichment ratio calculations demonstrated the high propensity of the title complex to form C-H…Cl, C-H…F and C-H…O interactions.
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Affiliation(s)
- Anna Pietrzak
- Institute of General and Ecological Chemistry, Łódź University of Technology, Żeromskiego 116, 90-924 Łódź, Poland
- Correspondence:
| | - Jannick Guschlbauer
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-001 Łódź, Poland; (J.G.); (P.K.)
| | - Piotr Kaszyński
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-001 Łódź, Poland; (J.G.); (P.K.)
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN 37132, USA
- Faculty of Chemistry, University of Łódź, Tamka 12, 91-403 Łódź, Poland
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27
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Berrino E, Michelet B, Martin‐Mingot A, Carta F, Supuran CT, Thibaudeau S. Modulating the Efficacy of Carbonic Anhydrase Inhibitors through Fluorine Substitution. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Emanuela Berrino
- University of Florence NEUROFARBA Dept. Sezione di Scienze Farmaceutiche e Nutraceutiche Via Ugo Schiff 6 50019 Sesto Fiorentino Florence Italy
| | - Bastien Michelet
- Superacid Group in “Organic Synthesis” Team Université de Poitiers CNRS UMR 7285 IC2MP Bât. B28, 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 09 France
| | - Agnès Martin‐Mingot
- Superacid Group in “Organic Synthesis” Team Université de Poitiers CNRS UMR 7285 IC2MP Bât. B28, 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 09 France
| | - Fabrizio Carta
- University of Florence NEUROFARBA Dept. Sezione di Scienze Farmaceutiche e Nutraceutiche Via Ugo Schiff 6 50019 Sesto Fiorentino Florence Italy
| | - Claudiu T. Supuran
- University of Florence NEUROFARBA Dept. Sezione di Scienze Farmaceutiche e Nutraceutiche Via Ugo Schiff 6 50019 Sesto Fiorentino Florence Italy
| | - Sébastien Thibaudeau
- Superacid Group in “Organic Synthesis” Team Université de Poitiers CNRS UMR 7285 IC2MP Bât. B28, 4 rue Michel Brunet, TSA 51106 86073 Poitiers Cedex 09 France
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28
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Telychko M, Wang L, Hsu CH, Li G, Peng X, Song S, Su J, Chuang FC, Wu J, Wong MW, Lu J. Tailoring long-range superlattice chirality in molecular self-assemblies via weak fluorine-mediated interactions. Phys Chem Chem Phys 2021; 23:21489-21495. [PMID: 34550130 DOI: 10.1039/d1cp02996g] [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
Controllable fabrication of enantiospecific molecular superlattices is a matter of imminent scientific and technological interest. Herein, we demonstrate that long-range superlattice chirality in molecular self-assemblies can be tailored by tuning the interplay of weak intermolecular non-covalent interactions between hexaphenylbenzene-based enantiomers. By means of high-resolution scanning tunneling microscopy measurements, we demonstrate that the functionalization of a hexaphenylbenzene-based molecule with fluorine (F) atoms leads to the formation of molecular self-assemblies with distinct long-range chiral recognition patterns. We employed density functional theory calculations to quantify F-mediated lone pair F⋯π, C-H⋯F, and F⋯F interactions attributed to the distinct enantiospecific molecular self-organizations. Our findings underpin a viable route to fabricate long-range chiral recognition patterns in supramolecular assemblies by engineering the weak non-covalent intermolecular interactions.
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Affiliation(s)
- Mykola Telychko
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Lulu Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Chia-Hsiu Hsu
- Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.,Physics Division, National Center for Theoretical Sciences, Taipei, 10617, Taiwan.
| | - Guangwu Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Xinnan Peng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Shaotang Song
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Jie Su
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Feng-Chuan Chuang
- Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.,Physics Division, National Center for Theoretical Sciences, Taipei, 10617, Taiwan.
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Ming Wah Wong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
| | - Jiong Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore. .,Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
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29
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Kiser PD. Retinal pigment epithelium 65 kDa protein (RPE65): An update. Prog Retin Eye Res 2021; 88:101013. [PMID: 34607013 PMCID: PMC8975950 DOI: 10.1016/j.preteyeres.2021.101013] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/21/2021] [Accepted: 09/24/2021] [Indexed: 12/21/2022]
Abstract
Vertebrate vision critically depends on an 11-cis-retinoid renewal system known as the visual cycle. At the heart of this metabolic pathway is an enzyme known as retinal pigment epithelium 65 kDa protein (RPE65), which catalyzes an unusual, possibly biochemically unique, reaction consisting of a coupled all-trans-retinyl ester hydrolysis and alkene geometric isomerization to produce 11-cis-retinol. Early work on this isomerohydrolase demonstrated its membership to the carotenoid cleavage dioxygenase superfamily and its essentiality for 11-cis-retinal production in the vertebrate retina. Three independent studies published in 2005 established RPE65 as the actual isomerohydrolase instead of a retinoid-binding protein as previously believed. Since the last devoted review of RPE65 enzymology appeared in this journal, major advances have been made in a number of areas including our understanding of the mechanistic details of RPE65 isomerohydrolase activity, its phylogenetic origins, the relationship of its membrane binding affinity to its catalytic activity, its role in visual chromophore production for rods and cones, its modulation by macromolecules and small molecules, and the involvement of RPE65 mutations in the development of retinal diseases. In this article, I will review these areas of progress with the goal of integrating results from the varied experimental approaches to provide a comprehensive picture of RPE65 biochemistry. Key outstanding questions that may prove to be fruitful future research pursuits will also be highlighted.
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Affiliation(s)
- Philip D Kiser
- Research Service, VA Long Beach Healthcare System, Long Beach, CA, 90822, USA; Department of Physiology & Biophysics, University of California, Irvine School of Medicine, Irvine, CA, 92697, USA; Department of Ophthalmology and Center for Translational Vision Research, Gavin Herbert Eye Institute, University of California, Irvine School of Medicine, Irvine, CA, 92697, USA.
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30
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Blum E, Zhang J, Zaluski J, Einstein DE, Korshin EE, Kubas A, Gruzman A, Tochtrop GP, Kiser PD, Palczewski K. Rational Alteration of Pharmacokinetics of Chiral Fluorinated and Deuterated Derivatives of Emixustat for Retinal Therapy. J Med Chem 2021; 64:8287-8302. [PMID: 34081480 DOI: 10.1021/acs.jmedchem.1c00279] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recycling of all-trans-retinal to 11-cis-retinal through the visual cycle is a fundamental metabolic pathway in the eye. A potent retinoid isomerase (RPE65) inhibitor, (R)-emixustat, has been developed and tested in several clinical trials; however, it has not received regulatory approval for use in any specific retinopathy. Rapid clearance of this drug presents challenges to maintaining concentrations in eyes within a therapeutic window. To address this pharmacokinetic inadequacy, we rationally designed and synthesized a series of emixustat derivatives with strategically placed fluorine and deuterium atoms to slow down the key metabolic transformations known for emixustat. Crystal structures and quantum chemical analysis of RPE65 in complex with the most potent emixustat derivatives revealed the structural and electronic bases for how fluoro substituents can be favorably accommodated within the active site pocket of RPE65. We found a close (∼3.0 Å) F-π interaction that is predicted to contribute ∼2.4 kcal/mol to the overall binding energy.
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Affiliation(s)
- Eliav Blum
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Jianye Zhang
- Department of Ophthalmology, Gavin Herbert Eye Institute, University of California, Irvine, California 92697, United States
| | - Jordan Zaluski
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - David E Einstein
- Department of Physiology and Biophysics, University of California, Irvine, California 92697, United States.,Research Service, VA Long Beach Healthcare System, Long Beach, California 90822, United States
| | - Edward E Korshin
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Adam Kubas
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland
| | - Arie Gruzman
- Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Gregory P Tochtrop
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Philip D Kiser
- Department of Ophthalmology, Gavin Herbert Eye Institute, University of California, Irvine, California 92697, United States.,Department of Physiology and Biophysics, University of California, Irvine, California 92697, United States.,Research Service, VA Long Beach Healthcare System, Long Beach, California 90822, United States
| | - Krzysztof Palczewski
- Department of Ophthalmology, Gavin Herbert Eye Institute, University of California, Irvine, California 92697, United States.,Department of Physiology and Biophysics, University of California, Irvine, California 92697, United States.,Department of Chemistry, University of California, Irvine, California 92697, United States
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31
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Berrino E, Michelet B, Martin-Mingot A, Carta F, Supuran CT, Thibaudeau S. Modulating the Efficacy of Carbonic Anhydrase Inhibitors through Fluorine Substitution. Angew Chem Int Ed Engl 2021; 60:23068-23082. [PMID: 34028153 DOI: 10.1002/anie.202103211] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/19/2021] [Indexed: 12/19/2022]
Abstract
The insertion of fluorine atoms and/or fluoroalkyl groups can lead to many beneficial effects in biologically active molecules, such as enhanced metabolic stability, bioavailability, lipophilicity, and membrane permeability, as well as a strengthening of protein-ligand binding interactions. However, this "magic effect" of fluorine atom(s) insertion can often be meaningless. Taking advantage of the wide range of data coming from the quest for carbonic anhydrase (CA) fluorinated inhibitors, this Minireview attempts to give "general guidelines" on how to wisely insert fluorine atom(s) within an inhibitor moiety to precisely enhance or disrupt ligand-protein interactions, depending on the target location of the fluorine substitution in the ligand. Multiple approaches such as ITC, kinetic and inhibition studies, X-ray crystallography, and NMR spectroscopy are useful in dissecting single binding contributions to the overall observed effect. The exploitation of innovative directions made in the field of protein and ligand-based fluorine NMR screening is also discussed to avoid misconduct and finely tune the exploitation of selective fluorine atom insertion in the future.
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Affiliation(s)
- Emanuela Berrino
- University of Florence, NEUROFARBA Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Bastien Michelet
- Superacid Group in "Organic Synthesis" Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 09, France
| | - Agnès Martin-Mingot
- Superacid Group in "Organic Synthesis" Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 09, France
| | - Fabrizio Carta
- University of Florence, NEUROFARBA Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Claudiu T Supuran
- University of Florence, NEUROFARBA Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Sébastien Thibaudeau
- Superacid Group in "Organic Synthesis" Team, Université de Poitiers, CNRS UMR 7285 IC2MP, Bât. B28, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 09, France
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32
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Effect of Fluoroalkyl-Substituent in Bistolane-Based Photoluminescent Liquid Crystals on Their Physical Behavior. CRYSTALS 2021. [DOI: 10.3390/cryst11040450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Photoluminescent liquid crystals (PLLCs) have attracted significant attention owing to their broad applicability in thermosensing and PL switching. Extensive efforts have been made to develop bistolane-based PLLCs containing flexible units at both molecular terminals, and it has been revealed that their PL behavior can switch with the phase transition between the crystalline and LC phases. Although slight modulation of the flexible unit structure dramatically alters the LC and PL behaviors, few studies into the modification of the flexible units have been conducted. With the aim of achieving dynamic changes in their physical behaviors, we developed a family of bistolane derivatives containing a simple alkyl or a fluoroalkyl flexible chain and carried out a detailed systematic evaluation of their physical behaviors. Bistolanes containing a simple alkyl chain showed a nematic LC phase, whereas switching the flexible chain in the bistolane to a fluoroalkyl moiety significantly altered the LC phase to generate a smectic phase. The fluoroalkyl-containing bistolanes displayed a stronger deep blue PL than their corresponding non-fluorinated counterparts, even in the crystalline phase, which was attributed to the construction of rigid molecular aggregates through intermolecular F···H and F···F interactions to suppress non-radiative deactivation.
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33
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Commins P, Dippenaar AB, Li L, Hara H, Haynes DA, Naumov P. Mechanically compliant single crystals of a stable organic radical. Chem Sci 2021; 12:6188-6193. [PMID: 33996017 PMCID: PMC8098752 DOI: 10.1039/d1sc01246k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 03/26/2021] [Indexed: 01/17/2023] Open
Abstract
Mechanically compliant organic crystals are the foundation of the development of future flexible, light-weight single-crystal electronics, and this requires reversibly deformable crystalline organic materials with permanent magnetism. Here, we report and characterize the first instance of a plastically bendable single crystal of a permanent organic radical, 4-(4'-cyano-2',3',4',5'-tetrafluorophenyl)-1,2,3,5-dithiadiazolyl. The weak interactions between the radicals render single crystals of the β phase of this material exceedingly soft, and the S-N interactions facilitate plastic bending. EPR imaging of a bent single crystal reveals the effect of deformation on the three-dimensional spin density of the crystal. The unusual mechanical compliance of this material opens prospects for exploration into flexible crystals of other stable organic radicals towards the development of flexible light-weight organic magnetoresistance devices based on weak, non-hydrogen-bonded interactions in molecular crystals.
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Affiliation(s)
- Patrick Commins
- Smart Materials Lab, New York University Abu Dhabi PO Box 129188 Abu Dhabi United Arab Emirates
| | - A Bernard Dippenaar
- Department of Chemistry and Polymer Science, Stellenbosch University P. Bag X1 Matieland 7602 Republic of South Africa
| | - Liang Li
- Smart Materials Lab, New York University Abu Dhabi PO Box 129188 Abu Dhabi United Arab Emirates
| | - Hideyuki Hara
- Bruker K.K. 3-9, Moriya, Kanagawa Yokohama Kanagawa 221-0022 Japan
| | - Delia A Haynes
- Department of Chemistry and Polymer Science, Stellenbosch University P. Bag X1 Matieland 7602 Republic of South Africa
| | - Panče Naumov
- Smart Materials Lab, New York University Abu Dhabi PO Box 129188 Abu Dhabi United Arab Emirates
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34
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Funabiki K, Yamada K, Matsueda H, Arisawa Y, Agou T, Kubota Y, Inuzuka T, Wasada H. Perfluorophenyl‐Perfluorophenyl Stacking‐Promoted Aggregation‐Induced Emission Enhancement of Crystalline 5‐Aryloxy‐3
H
‐Indole. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Kengo Yamada
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Hisaki Matsueda
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Yuta Arisawa
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Tomohiro Agou
- Department of Biomolecular Functional Engineering Ibaraki University 4-12-1 Nakanarusawa Hitachi 316-8511 Japan
| | - Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis Life Science Research Center Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Hiroaki Wasada
- Department of Policy Studies Gifu University 1-1 Yanagido Gifu 501-1193 Japan
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35
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Chen L, Che Y, Cooper AI, Chong SY. Exploring cooperative porosity in organic cage crystals using in situ diffraction and molecular simulations. Faraday Discuss 2021; 225:100-117. [PMID: 33146640 DOI: 10.1039/d0fd00022a] [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
A porous organic cage crystal, α-CC2, shows unexpected adsorption of sulphur hexafluoride (SF6) in its cage cavities: analysis of the static crystal structure indicates that SF6 is occluded, as even the smallest diatomic gas, H2, is larger than the window of the cage pore. Herein, we use in situ powder X-ray diffraction (PXRD) experiments to provide unequivocal evidence for the presence of SF6 inside the 'occluded' cage voids, pointing to a mechanism of dynamic flexibility of the system. By combining PXRD results with molecular dynamics simulations, we build a molecular level picture of the cooperative porosity in α-CC2 that facilitates the passage of SF6 into the cage voids.
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Affiliation(s)
- Linjiang Chen
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool, L7 3NY, UK.
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36
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Anighoro A. Underappreciated Chemical Interactions in Protein-Ligand Complexes. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2021; 2114:75-86. [PMID: 32016887 DOI: 10.1007/978-1-0716-0282-9_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Non-covalent interactions lie at the bases of the molecular recognition process. In medicinal chemistry, understanding how bioactive molecules interact with their target can help to explain structure-activity relationships (SAR) and improve potency of lead compounds. In particular, computational analysis of protein-ligand complexes can help to unravel key interactions and guide structure-based drug design.The literature describing protein-ligand complexes is typically focused on few types of non-covalent interactions (e.g., hydrophobic contacts, hydrogen bonds, and salt bridges). Stacking interactions involving aromatic rings are also relatively well known to medicinal chemistry practitioners. Potency optimization efforts are often focused on targeting these interactions. However, a variety of underappreciated interactions were shown to have a relevant effect on the stabilization of protein-ligand complexes. This chapter aims at listing selected non-covalent interactions and discuss some examples on how they can impact drug design.
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37
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Computational and Experimental Insights into Asymmetric Rh‐Catalyzed Hydrocarboxylation with CO
2. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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38
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Li P, Vik EC, Shimizu KD. N-Arylimide Molecular Balances: A Comprehensive Platform for Studying Aromatic Interactions in Solution. Acc Chem Res 2020; 53:2705-2714. [PMID: 33152232 DOI: 10.1021/acs.accounts.0c00519] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Noncovalent interactions of aromatic surfaces play a key role in many biological processes and in determining the properties and utility of synthetic materials, sensors, and catalysts. However, the study of aromatic interactions has been challenging because these interactions are usually very weak and their trends are modulated by many factors such as structural, electronic, steric, and solvent effects. Recently, N-arylimide molecular balances have emerged as highly versatile and effective platforms for studying aromatic interactions in solution. These molecular balances can accurately measure weak noncovalent interactions in solution via their influence on the folded-unfolded conformational equilibrium. The structure (i.e., size, shape, π-conjugation, and substitution) and nature (i.e., element, charge, and polarity) of the π-surfaces and interacting groups can be readily varied, enabling the study of a wide range of aromatic interactions. These include aromatic stacking, heterocyclic aromatic stacking, and alkyl-π, chalcogen-π, silver-π, halogen-π, substituent-π, and solvent-π interactions. The ability to measure a diverse array of aromatic interactions within a single model system provides a unique perspective and insights as the interaction energies, stability trends, and solvent effects for different types of interactions can be directly compared. Some broad conclusions that have emerged from this comprehensive analysis include: (1) The strongest aromatic interactions involve groups with positive charges such as pyridinium and metal ions which interact with the electrostatically negative π-face of the aromatic surface via cation-π or metal-π interactions. Attractive electrostatic interactions can also form between aromatic surfaces and groups with partial positive charges. (2) Electrostatic interactions involving aromatic surfaces can be switched from repulsive to attractive using electron-withdrawing substituents or heterocycles. These electrostatic trends appear to span many types of aromatic interactions involving a polar group interacting with a π-surface such as halogen-π, chalcogen-π, and carbonyl-π. (3) Nonpolar groups form weak but measurable stabilizing interactions with aromatic surfaces in organic solvents due to favorable dispersion and/or solvophobic effects. A good predictor of the interaction strength is provided by the change in solvent-accessible surface area. (4) Solvent effects modulate the aromatic interactions in the forms of solvophobic effects and competitive solvation, which can be modeled using solvent cohesion density and specific solvent-solute interactions.
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Affiliation(s)
- Ping Li
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Erik C. Vik
- Vertex Pharmaceuticals, 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Ken D. Shimizu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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39
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Jourdain de Muizon C, Ramanoudjame SM, Esteoulle L, Ling C, Brou G, Anton N, Vandamme T, Delsuc MA, Bonnet D, Kieffer B. Self-organization Properties of a GPCR-Binding Peptide with a Fluorinated Tail Studied by Fluorine NMR Spectroscopy. Chembiochem 2020; 22:657-661. [PMID: 32986915 DOI: 10.1002/cbic.202000601] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/25/2020] [Indexed: 12/31/2022]
Abstract
Conjugation of the bioactive apelin-17 peptide with a fluorocarbon chain results in self-organization of the peptide into micelles. Fluorine NMR spectroscopy studies show that the fluoropeptide's micelles are monodisperse, while proton NMR indicates that the peptide moiety remains largely disordered despite micellization. A very fast exchange rate is measured between the free and micellar states of the peptide which enables the number of molecules present in the micelle to be estimated as 200, in agreement with values found by dynamic light scattering measurements.
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Affiliation(s)
| | - Sridévi M Ramanoudjame
- Laboratoire d'Innovation Thérapeutique, LabEx MEDALIS, Université de Strasbourg, CNRS UMR, 7200 Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Lucie Esteoulle
- Laboratoire d'Innovation Thérapeutique, LabEx MEDALIS, Université de Strasbourg, CNRS UMR, 7200 Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Claude Ling
- Departement of Integrative Structural Biology, IGBMC, Université de Strasbourg, INSERM U596, CNRS UMR, 7104 1, rue Laurent Fries, 67404, Illkirch, France
| | - Germain Brou
- Conception et Applications de Molécules Bioactives, Université de Strasbourg, CNRS UMR 7199, Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Nicolas Anton
- Conception et Applications de Molécules Bioactives, Université de Strasbourg, CNRS UMR 7199, Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Thierry Vandamme
- Conception et Applications de Molécules Bioactives, Université de Strasbourg, CNRS UMR 7199, Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Marc-André Delsuc
- Departement of Integrative Structural Biology, IGBMC, Université de Strasbourg, INSERM U596, CNRS UMR, 7104 1, rue Laurent Fries, 67404, Illkirch, France.,CASC4DE Le Lodge 20, Avenue du Neuhof, 67100, Strasbourg, France
| | - Dominique Bonnet
- Laboratoire d'Innovation Thérapeutique, LabEx MEDALIS, Université de Strasbourg, CNRS UMR, 7200 Faculté de Pharmacie, 74 route du Rhin, 67401, Illkirch-Graffenstaden, France
| | - Bruno Kieffer
- Departement of Integrative Structural Biology, IGBMC, Université de Strasbourg, INSERM U596, CNRS UMR, 7104 1, rue Laurent Fries, 67404, Illkirch, France
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40
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Yakubov S, Barham JP. Photosensitized direct C-H fluorination and trifluoromethylation in organic synthesis. Beilstein J Org Chem 2020; 16:2151-2192. [PMID: 32952732 PMCID: PMC7476599 DOI: 10.3762/bjoc.16.183] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/17/2020] [Indexed: 12/11/2022] Open
Abstract
The importance of fluorinated products in pharmaceutical and medicinal chemistry has necessitated the development of synthetic fluorination methods, of which direct C-H fluorination is among the most powerful. Despite the challenges and limitations associated with the direct fluorination of unactivated C-H bonds, appreciable advancements in manipulating the selectivity and reactivity have been made, especially via transition metal catalysis and photochemistry. Where transition metal catalysis provides one strategy for C-H bond activation, transition-metal-free photochemical C-H fluorination can provide a complementary selectivity via a radical mechanism that proceeds under milder conditions than thermal radical activation methods. One exciting development in C-F bond formation is the use of small-molecule photosensitizers, allowing the reactions i) to proceed under mild conditions, ii) to be user-friendly, iii) to be cost-effective and iv) to be more amenable to scalability than typical photoredox-catalyzed methods. In this review, we highlight photosensitized C-H fluorination as a recent strategy for the direct and remote activation of C-H (especially C(sp3)-H) bonds. To guide the readers, we present the developing mechanistic understandings of these reactions and exemplify concepts to assist the future planning of reactions.
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Affiliation(s)
- Shahboz Yakubov
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany
| | - Joshua P Barham
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany
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41
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Viesser RV, Tormena CF. Counterintuitive deshielding on the 13 C NMR chemical shift for the trifluoromethyl anion. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:540-547. [PMID: 31705544 DOI: 10.1002/mrc.4958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
The trifluoromethyl anion (CF3 - ) displays 13 C NMR chemical shift (175.0 ppm) surprisingly larger than neutral (CHF3 , 122.2 ppm) and cation (CF3 + , 150.7 ppm) compounds. This unexpected deshielding effect for a carbanion is investigated by density functional theory calculations and decomposition analyses of the 13 C shielding tensor into localized molecular orbital contributions. The present work determines the shielding mechanisms involved in the observed behaviour of the fluorinated anion species, shedding light on the experimental NMR data and demystify the classical correlation between electron density and NMR chemical shift. The presence of fluorine atoms induces the carbon lone pair to create a paramagnetic shielding on the carbon nucleus.
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Affiliation(s)
- Renan V Viesser
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, Campinas, SP, 13083-970, Brazil
| | - Cláudio F Tormena
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, Campinas, SP, 13083-970, Brazil
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42
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Flexible diaminodihydrotriazine inhibitors of Plasmodium falciparum dihydrofolate reductase: Binding strengths, modes of binding and their antimalarial activities. Eur J Med Chem 2020; 195:112263. [DOI: 10.1016/j.ejmech.2020.112263] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 01/12/2023]
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43
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Sperandio C, Rodriguez J, Quintard A. Development of copper-catalyzed enantioselective decarboxylative aldolization for the preparation of perfluorinated 1,3,5-triols featuring supramolecular recognition properties. Chem Sci 2020; 11:1629-1635. [PMID: 32206281 PMCID: PMC7069514 DOI: 10.1039/c9sc05196a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/17/2019] [Indexed: 01/09/2023] Open
Abstract
Fluorine is able to confer unique properties to organic molecules but the scarcity of natural organofluorine sources renders the development of new synthetic methods highly desirable. Using a chiral BOX/Cu combination, enantioselective decarboxylative aldolization of perfluorinated aldehydes has been developed. Most notably, the reaction occurring under mild conditions and with high enantiocontrol can create ketodiols in one single synthetic operation, which are precursors of crucial perfluorinated 1,3,5-triols. In addition, the reaction performed with chloral, validates the proposed transition state model based on steric interactions and provides the first enantioselective synthesis of hexachlorinated ketodiol of great synthetic utility. The ability of perfluorinated 1,3,5-triols to form a central hydrogen-bonding framework allows strong coordination of anions and the chirality obtained through the catalyst-controlled synthetic sequence demonstrates the selective chiral anion recognition ability of polyols.
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Affiliation(s)
- Céline Sperandio
- Aix Marseille Univ , CNRS , Centrale Marseille , iSm2 , Marseille , France . ; http://ism2.univ-amu.fr/fr/annuaire/stereo/quintardadrien
| | - Jean Rodriguez
- Aix Marseille Univ , CNRS , Centrale Marseille , iSm2 , Marseille , France . ; http://ism2.univ-amu.fr/fr/annuaire/stereo/quintardadrien
| | - Adrien Quintard
- Aix Marseille Univ , CNRS , Centrale Marseille , iSm2 , Marseille , France . ; http://ism2.univ-amu.fr/fr/annuaire/stereo/quintardadrien
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44
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Sava A, Kegyes KT, Popuş BT, Dan BC, Silvestru C, Raţ CI. Halogen bonding between entirely negative fluorine atoms? Evidence from the crystal packing of some gold( i) and gold( iii) complexes with extensively fluorinated m-terphenyl ligands and triphenylphosphane. CrystEngComm 2020. [DOI: 10.1039/d0ce00671h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Intermolecular interactions between fluorine atoms, analogous to halogen bonding, are able to drive the solid-state arrangement of molecules.
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Affiliation(s)
- Alexandru Sava
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
| | - Krisztina T. Kegyes
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
| | - Bianca T. Popuş
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
| | - Bernadette C. Dan
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
| | - Cristian Silvestru
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
| | - Ciprian I. Raţ
- Supramolecular Organic and Organometallic Chemistry Centre
- Chemistry Department
- Faculty of Chemistry and Chemical Engineering
- Babeş-Bolyai University
- Cluj-Napoca RO-400028
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45
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Li P, Vik EC, Maier JM, Karki I, Strickland SMS, Umana JM, Smith MD, Pellechia PJ, Shimizu KD. Electrostatically Driven CO−π Aromatic Interactions. J Am Chem Soc 2019; 141:12513-12517. [DOI: 10.1021/jacs.9b06363] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ping Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Erik C. Vik
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Josef M. Maier
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ishwor Karki
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Sharon M. S. Strickland
- Department of Biology, Chemistry, and Physics, Converse College, Spartanburg, South Carolina 29302, United States
| | - Jessica M. Umana
- Department of Biology, Chemistry, and Physics, Converse College, Spartanburg, South Carolina 29302, United States
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Perry J. Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ken D. Shimizu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Marczenko KM, Johnson CL, Chitnis SS. Synthesis of a Perfluorinated Phenoxyphosphorane and Conversion to Its Hexacoordinate Anions. Chemistry 2019; 25:8865-8874. [PMID: 30958579 DOI: 10.1002/chem.201901333] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Indexed: 12/19/2022]
Abstract
We report the synthesis and structural characterization of a neutral PV Lewis acid, P(OC6 F5 )5 , and salts containing the six-coordinate anions [P(OC6 F5 )5 F]- and [P(OC6 F5 )6 ]- . The latter anion exhibits a rare example of F-πarene interactions in both the solid and the solution phase, which has been quantitatively studied by variable-temperature (VT) NMR spectroscopy. The Lewis acid strength of P(OC6 F5 )5 has been assessed through experimental fluoride ion competition experiments and quantum-chemical calculations of its fluoride ion affinity (FIA) and global electrophilicity index (GEI). Our findings highlight the importance of considering solvent effects in electrophilicity calculations, even when neutral Lewis acids are involved, and show a rare divergence between FIA and GEI trends. The coordinating abilities of the [P(OC6 F5 )6 ]- and [P(OC6 F5 )5 F]- anions towards the trityl cation, as a prototypical electrophile, have been assessed.
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Affiliation(s)
- Katherine M Marczenko
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
| | - Chloe-Louise Johnson
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
| | - Saurabh S Chitnis
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
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47
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Aliev AE, Motherwell WB. Some Recent Advances in the Design and Use of Molecular Balances for the Experimental Quantification of Intramolecular Noncovalent Interactions of π Systems. Chemistry 2019; 25:10516-10530. [DOI: 10.1002/chem.201900854] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 05/09/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Abil E. Aliev
- Department of ChemistryUniversity College London 20 Gordon Street London WC1H 0AJ UK
| | - William B. Motherwell
- Department of ChemistryUniversity College London 20 Gordon Street London WC1H 0AJ UK
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48
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Tanaka H, Haketa Y, Yasuda N, Maeda H. Substitution-Pattern- and Counteranion-Depending Ion-Pairing Assemblies Based on Electron-Deficient Porphyrin-Au III Complexes. Chem Asian J 2019; 14:2129-2137. [PMID: 30968582 DOI: 10.1002/asia.201900422] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Indexed: 11/11/2022]
Abstract
Porphyrin-AuIII complexes, which were partially or totally modified with C6 F5 at the meso positions, were synthesized. The highly electron-withdrawing substituents induced electron-deficient states and Lewis acid properties. Single-crystal X-ray analysis of the ion pairs revealed ion-pairing assemblies with characteristics dependent on the number and substitution pattern of the C6 F5 units and the geometries of the anions.
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Affiliation(s)
- Hiroki Tanaka
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Yohei Haketa
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Nobuhiro Yasuda
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute, Sayo, 679-5198, Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, 525-8577, Japan
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49
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Noskov Y, Sorochinsky A, Kukhar V, Pud A. Polyaniline Doping by α,α-Difluoro-β-amino Acids. ACS OMEGA 2019; 4:7400-7410. [PMID: 31459838 PMCID: PMC6649075 DOI: 10.1021/acsomega.9b00207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/15/2019] [Indexed: 06/10/2023]
Abstract
Currently, polyaniline (PANI) is considered as a promising polymer that can be used in biosensors, drug delivery systems, bioelectronics, etc. Its biocompatibility can be strongly improved by using dopants with biofunctionality. This study reveals the protonation/doping of PANI by fluorinated analogs of natural amino acids, namely, α,α-difluoro-β-amino acids (DFAAs) with alkyl and aromatic tails in N-methylpyrrolidone solutions. We find that these acids can dope PANI due to both the weakened basicity of their amino groups because of two fluorine atoms in α,α-positions and specific intermolecular interactions (π-π stacking, alkyl-π, F-π) of their tails with units of PANI chains. These interactions did not give the doped PANI salts with high conductivity but led to formation of stable PANI-DFAA complexes, which were confirmed both by clear changes in the UV-Vis and Fourier transform infrared spectra of the protonated/doped PANI and by their conductivity of ∼10-6 S/cm. Our results suggest an applicability of such PANI complexes as carriers of DFAA for their biomedical applications.
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50
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Roy P, Ghosh B, Chatterjee P, Sengupta N. Cosolvent Impurities in SWCNT Nanochannel Confinement: Length Dependence of Water Dynamics Investigated with Atomistic Simulations. J Chem Inf Model 2019; 59:2026-2034. [PMID: 30908024 DOI: 10.1021/acs.jcim.8b00889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The advent of nanotechnology has seen a growing interest in the nature of fluid flow and transport under nanoconfinement. The present study leverages fully atomistic molecular dynamics (MD) simulations to study the effect of nanochannel length and intrusion of molecules of the organic solvent, hexafluoro-2-propanol (HFIP), on the dynamical characteristics of water within it. Favorable interactions of HFIP with the nanochannels comprised of single-walled carbon nanotubes traps them over time scales greater than 100 ns, and confinement confers small but distinguishable spatial redistribution between neighboring HFIP pairs. Water molecules within the nanochannels show clear signatures of dynamical slowdown relative to bulk water even for pure systems. The presence of HFIP causes further rotational and translational slowdown in waters when the nanochannel dimension falls below a critical length of 30 Å. The enhanced slowdown in the presence of HFIP is quantified from characteristic relaxation parameters and diffusion coefficients in the absence and presence of HFIP. It is finally seen that the net flow of water between the ends of the nanochannel shows a decreasing dependence with nanochannel length only when the number of HFIP molecules is small. These results lend insights into devising ways of modulating solvent properties within nanochannels with cosolvent impurities.
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Affiliation(s)
- Priti Roy
- Department of Biological Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741 246 , India
| | - Brataraj Ghosh
- Department of Biological Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741 246 , India
| | - Prathit Chatterjee
- Advanced Polymer Lab in association with Polymer Research Centre , IISER Kolkata, ADO ADDITIVES MFG PVT. LTD. , 201/A, Nadibhag 2nd Lane , Madhyamgram, Kolkata 700 128 , India
| | - Neelanjana Sengupta
- Department of Biological Sciences , Indian Institute of Science Education and Research Kolkata , Mohanpur 741 246 , India.,Centre for Advanced Functional Materials (CAFM) , Indian Institute of Science Education and Research Kolkata , Mohanpur 741 246 , India
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