1
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Sukumaran DP, Shoyama K, Dubey RK, Würthner F. Cooperative Binding and Chirogenesis in an Expanded Perylene Bisimide Cyclophane. J Am Chem Soc 2024. [PMID: 39045838 DOI: 10.1021/jacs.4c08073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
The encapsulation of more than one guest molecule into a synthetic cavity is a highly desirable yet a highly challenging task to achieve for neutral supramolecular hosts in organic media. Herein, we report a neutral perylene bisimide cyclophane, which has a tailored chiral cavity with an interchromophoric distance of 11.2 Å, capable of binding two aromatic guests in a π-stacked fashion. Detailed host-guest binding studies with a series of aromatic guests revealed that the encapsulation of the second guest in this cyclophane is notably more favored than the first one. Accordingly, for the encapsulation of the coronene dimer, a cooperativity factor (α) as high as 485 was observed, which is remarkably high for neutral host-guest systems. Furthermore, a successful chirality transfer, from the chiral host to encapsulated coronenes, resulted in a chiral charge-transfer (CT) complex and the rare observation of circularly polarized emission originating from the CT state for a noncovalent donor-acceptor assembly in solution. The involvement of the CT state also afforded an enhancement in the luminescence dissymmetry factor (glum) value due to its relatively large magnetic transition dipole moment. The 1:2 binding pattern and chirality-transfer were unambiguously verified by single-crystal X-ray diffraction analysis of the host-guest superstructures.
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Affiliation(s)
- Divya P Sukumaran
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Kazutaka Shoyama
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
- Center for Nanosystems Chemistry (CNC), Universität Würzburg, Würzburg 97074, Germany
| | - Rajeev K Dubey
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, Würzburg 97074, Germany
- Center for Nanosystems Chemistry (CNC), Universität Würzburg, Würzburg 97074, Germany
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2
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Yuan W, Chen L, Yuan C, Zhang Z, Chen X, Zhang X, Guo J, Qian C, Zhao Z, Zhao Y. Cooperative supramolecular polymerization of styrylpyrenes for color-dependent circularly polarized luminescence and photocycloaddition. Nat Commun 2023; 14:8022. [PMID: 38049414 PMCID: PMC10696047 DOI: 10.1038/s41467-023-43830-x] [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: 06/20/2023] [Accepted: 11/22/2023] [Indexed: 12/06/2023] Open
Abstract
Developing facile and efficient methods to obtain circularly polarized luminescence (CPL) materials with a large luminescence dissymmetry factor (glum) and fluorescence quantum yield (ΦY) is attractive but still challenging. Herein, supramolecular polymerization of styrylpyrenes (R/S-PEB) is utilized to attain this aim, which can self-assemble into helical nanoribbons. Benefiting from the dominant CH-π interactions between the chromophores, the supramolecular solution of S-PEB shows remarkable blue-color CPL property (glum: 0.011, ΦY: 69%). From supramolecular solution to gel, the emission color (blue to yellow-green) and handedness of CPL (glum: -0.011 to +0.005) are concurrently manipulated, while the corresponding supramolecular chirality maintains unchanged, representing the rare example of color-dependent CPL materials. Thanks to the supramolecular confine effect, the [2 + 2] cycloaddition reaction rate of the supramolecular solution is 10.5 times higher than that of the monomeric solution. In contrast, no cycloaddition reaction occurs for the gel and assembled solid samples. Our findings provide a vision for fabricating multi-modal and high-performance CPL-active materials, paving the way for the development of advanced photo-responsive chiral systems.
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Affiliation(s)
- Wei Yuan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Letian Chen
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China
| | - Chuting Yuan
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zidan Zhang
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX, 78712, USA
| | - Xiaokai Chen
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Xiaodong Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jingjing Guo
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Cheng Qian
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China.
| | - Yanli Zhao
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
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3
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Stapf M, Schmidt U, Seichter W, Mazik M. Synthesis and crystal structures of two solvates of 1-{[2,6-bis-(hy-droxy-meth-yl)-4-methyl-phen-oxy]meth-yl}-3,5-bis-{[(4,6-di-methyl-pyridin-2-yl)amino]meth-yl}-2,4,6-tri-ethyl-benzene. Acta Crystallogr E Crystallogr Commun 2023; 79:1067-1071. [PMID: 37936864 PMCID: PMC10626963 DOI: 10.1107/s2056989023009155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/18/2023] [Indexed: 11/09/2023]
Abstract
In the crystal structures of the formamide monosolvate (1a) and the n-propanol/H2O solvate/hydrate (1b) of the title compound, C38H50N4O3 (1), the tripodal host mol-ecule adopts a conformation in which the substituents attached to the central benzene ring are arranged in an alternating order above and below the ring plane. As a result of the different nature of the involved guest species, the crystal components in 1a create a three-dimensional supra-molecular architecture, while the crystal structure of 1b consists of two-dimensional supra-molecular aggregates extending parallel to the crystallographic ab plane.
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Affiliation(s)
- Manuel Stapf
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany
| | - Ute Schmidt
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany
| | - Monika Mazik
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599 Freiberg, Germany
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4
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Seidel P, Seichter W, Mazik M. Compounds Derived from 9,9-Dialkylfluorenes: Syntheses, Crystal Structures and Initial Binding Studies (Part II). ChemistryOpen 2023; 12:e202300019. [PMID: 37442791 PMCID: PMC10344870 DOI: 10.1002/open.202300019] [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: 02/10/2023] [Revised: 06/10/2023] [Indexed: 07/15/2023] Open
Abstract
New representatives of 2,4,7-trisubstituted 9,9-dialkyl-9H-fluorenes were prepared and used for crystallographic investigations as well as initial binding studies towards metal ions and carbohydrates. The binding studies, which included 1 H NMR spectroscopic titrations and fluorescence measurements, demonstrated the ability of the tested fluorene-based compounds to act as complexing agents for ionic and neutral substrates. Depending on the nature of the subunits of the fluorene derivatives, "turn on" or "turn off" fluorescent chemosensors can be developed. Compounds composed of 4,6-dimethylpyridin-2-yl-aminomethyl moieties have the potential to be used as sensitive "turn-on" chemosensors for some metal ions.
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Affiliation(s)
- Pierre Seidel
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Straße 29, 09599, Freiberg, Germany
| | - Monika Mazik
- Institut für Organische Chemie, Technische Universität Bergakademie Freiberg, Leipziger Straße 29, 09599, Freiberg, Germany
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5
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Meza-Morales W, Alvarez-Ricardo Y, Obregón-Mendoza MA, Arenaza-Corona A, Ramírez-Apan MT, Toscano RA, Poveda-Jaramillo JC, Enríquez RG. Three new coordination geometries of homoleptic Zn complexes of curcuminoids and their high antiproliferative potential. RSC Adv 2023; 13:8577-8585. [PMID: 36936838 PMCID: PMC10016078 DOI: 10.1039/d3ra00167a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/01/2023] [Indexed: 03/17/2023] Open
Abstract
To our previously reported first crystal structure of a homoleptic zinc curcuminoid complex with square pyramidal geometry, we add herein three new geometries of homoleptic type complexes i.e. octahedral, trigonal-pyramidal, and trigonal-bipyramidal. Octahedral geometry was observed in the new pseudo-polymorph of the DAC-Zn complex resulting from crystallization in DMF, while square-pyramidal geometry was obtained in DMSO. Improving crystallinity involved suppressing the phenolic interactions by etherification and esterification. The complete characterization of these complexes was carried out using SCXRD, IR, MS, EA, liquid, and solid-state NMR. Moreover, the cytotoxic activity of all complexes was evaluated. The IC50 values for the DiMeOC-Zn (7) complex were 8 or 22 times higher than for cisplatin in the U251 and HCT-15 cell lines, indicating a high antiproliferative and therapeutic potential.
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Affiliation(s)
- William Meza-Morales
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
- Department of Chemical Engineering, University of Puerto Rico-Mayaguez Route 108, Mayaguez Puerto Rico USA
| | - Yair Alvarez-Ricardo
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
| | - Marco A Obregón-Mendoza
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
| | - Antonino Arenaza-Corona
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
| | - María Teresa Ramírez-Apan
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
| | - Rubén A Toscano
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
| | - Juan Carlos Poveda-Jaramillo
- Laboratorio de Resonancia Magnética Nuclear, Universidad Industrial de Santander Sede Guatiguará Km. 2 vía El Refugio 681011 Piedecuesta Santander Colombia
| | - Raúl G Enríquez
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria Mexico City C.P. 04510 Mexico
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6
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Homoleptic Complexes of Heterocyclic Curcuminoids with Mg(II) and Cu(II): First Conformationally Heteroleptic Case, Crystal Structures, and Biological Properties. Molecules 2023; 28:molecules28031434. [PMID: 36771102 PMCID: PMC9919861 DOI: 10.3390/molecules28031434] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/10/2022] [Accepted: 11/13/2022] [Indexed: 02/05/2023] Open
Abstract
We report herein the synthesis and characterization of three heterocyclic curcuminoid ligands and their homoleptic metal complexes with magnesium and copper. Thus, N-methyl-2-pyrrolecarboxaldehyde, Furan-2-carboxaldehyde, and 2-Thiophenecarboxaldehyde were condensed with 2,4-pentanedione-boron trioxide complex. The first N-methyl-2-pyrrole curcuminoid and its Mg(II) complex are reported. All curcuminoid ligands and their corresponding metal complexes were characterized by infrared spectroscopy (IR), liquid state nuclear magnetic resonance (LSNMR), electron paramagnetic resonance (EPR), mass spectrometry (MS) and single crystal X-ray diffraction (SCXRD). The ThiopheneCurc-Cu (9) constitutes the first case of a "conformationally-heteroleptic" complex. The unique six-peaks star arrangement for the ThiopheneCurc ligand derived from the supramolecular description is reported. The metal complexes of FuranCurc-Mg (5) and ThiopheneCurc-Cu (9) have a good antioxidant effect (IC50 = 11.26 ± 1.73 and 10.30 ± 0.59 μM), three and two times higher than their free ligands respectively. Additionally, (5) shows remarkable cytotoxicity against colon cancer adenocarcinoma cell line HCT-15, comparable to that of cisplatin, with a negligible toxic effect in vitro towards a healthy monkey kidney cell line (COS-7).
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Cáceres-Vásquez J, Jara DH, Costamagna J, Martínez-Gómez F, Silva CP, Lemus L, Freire E, Baggio R, Vera C, Guerrero J. Effect of non-covalent self-dimerization on the spectroscopic and electrochemical properties of mixed Cu(i) complexes. RSC Adv 2023; 13:825-838. [PMID: 36686905 PMCID: PMC9810106 DOI: 10.1039/d2ra05341a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 12/06/2022] [Indexed: 01/05/2023] Open
Abstract
A series of six new Cu(i) complexes with ([Cu(N-{4-R}pyridine-2-yl-methanimine)(PPh3)Br]) formulation, where R corresponds to a donor or acceptor p-substituent, have been synthesized and were used to study self-association effects on their structural and electrochemical properties. X-ray diffraction results showed that in all complexes the packing is organized from a dimer generated by supramolecular π stacking and hydrogen bonding. 1H-NMR experiments at several concentrations showed that all complexes undergo a fast-self-association monomer-dimer equilibrium in solution, while changes in resonance frequency towards the high or low field in specific protons of the imine ligand allow establishing that dimers have similar structures to those found in the crystal. The thermodynamic parameters for this self-association process were calculated from dimerization constants determined by VT-1H-NMR experiments for several concentrations at different temperatures. The values for K D (4.0 to 70.0 M-1 range), ΔH (-1.4 to -2.6 kcal mol-1 range), ΔS (-0.2 to 2.1 cal mol-1 K-1 range), and ΔG 298 (-0.8 to -2.0 kcal mol-1 range) are of the same order and indicate that the self-dimerization process is enthalpically driven for all complexes. The electrochemical profile of the complexes shows two redox Cu(ii)/Cu(i) processes whose relative intensities are sensitive to concentration changes, indicating that both species are in chemical equilibrium, with the monomer and the dimer having different electrochemical characteristics. We associate this behaviour with the structural lability of the Cu(i) centre that allows the monomeric molecules to reorder conformationally to achieve a more adequate assembly in the non-covalent dimer. As expected, structural properties in the solid and in solution, as well as their electrochemical properties, are not correlated with the electronic parameters usually used to evaluate R substituent effects. This confirms that the properties of the Cu(i) complexes are usually more influenced by steric effects than by the inductive effects of substituents of the ligands. In fact, the results obtained showed the importance of non-covalent intermolecular interactions in the structuring of the coordination geometry around the Cu centre and in the coordinative stability to avoid dissociative equilibria.
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Affiliation(s)
- Joaquín Cáceres-Vásquez
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Danilo H. Jara
- Facultad de Ingenieria y Ciencias, Universidad Adolfo IbáñezAv. Padre Hurtado 750Viña del MarChile
| | - Juan Costamagna
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile,Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Fabián Martínez-Gómez
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile,Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Carlos P. Silva
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Luis Lemus
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Eleonora Freire
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaAvenida Gral. Paz 1499, 1650, San MartínBuenos AiresArgentina,Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Argentina and Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaBuenos AiresArgentina,Member of CONICETArgentina
| | - Ricardo Baggio
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaAvenida Gral. Paz 1499, 1650, San MartínBuenos AiresArgentina
| | - Cristian Vera
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Juan Guerrero
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
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8
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Three half-sandwiched iron(II) monocarbonyl complexes with PNP ligands: Their chemistry upon reduction and catalysis on proton reduction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Patel N, Patel AK, Travadi M, Jadeja R, Butcher R, Muddassir M, Kumar S, Kapavarapu R. Metal-organic hybrids based on [VO2(L)]− tecton with cations of imidazole and its derivative: Synthesis, single-crystal structures and molecular docking studies. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Benzene, an Unexpected Binding Unit in Anion–π Recognition: The Critical Role of CH/π Interactions. SCI 2022. [DOI: 10.3390/sci4030032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report high-level ab initio calculations (CCSD(T)(full)/CBS//SCS-RI-MP2(full)/aug-cc-pwCVTZ) that demonstrate the importance of cooperativity effects when Anion–π and CH/π interactions are simultaneously established with benzene as the π-system. In fact, most of the complexes exhibit high cooperativity energies that range from 17% to 25.3% of the total interaction energy, which is indicative of the strong influence of the CH/π on the Anion–π interaction and vice versa. Moreover, the symmetry-adapted perturbation theory (SAPT) partition scheme was used to study the different energy contributions to the interaction energies and to investigate the physical nature of the interplay between both interactions. Furthermore, the Atoms in Molecules (AIM) theory and the Non-Covalent Interaction (NCI) approach were used to analyze the two interactions further. Finally, a few examples from the Protein Data Bank (PDB) are shown. All results stress that the concurrent formation of both interactions may play an important role in biological systems due to the ubiquity of CH bonds, phenyl rings, and anions in biomolecules.
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Peluso P, Chankvetadze B. Recognition in the Domain of Molecular Chirality: From Noncovalent Interactions to Separation of Enantiomers. Chem Rev 2022; 122:13235-13400. [PMID: 35917234 DOI: 10.1021/acs.chemrev.1c00846] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
It is not a coincidence that both chirality and noncovalent interactions are ubiquitous in nature and synthetic molecular systems. Noncovalent interactivity between chiral molecules underlies enantioselective recognition as a fundamental phenomenon regulating life and human activities. Thus, noncovalent interactions represent the narrative thread of a fascinating story which goes across several disciplines of medical, chemical, physical, biological, and other natural sciences. This review has been conceived with the awareness that a modern attitude toward molecular chirality and its consequences needs to be founded on multidisciplinary approaches to disclose the molecular basis of essential enantioselective phenomena in the domain of chemical, physical, and life sciences. With the primary aim of discussing this topic in an integrated way, a comprehensive pool of rational and systematic multidisciplinary information is provided, which concerns the fundamentals of chirality, a description of noncovalent interactions, and their implications in enantioselective processes occurring in different contexts. A specific focus is devoted to enantioselection in chromatography and electromigration techniques because of their unique feature as "multistep" processes. A second motivation for writing this review is to make a clear statement about the state of the art, the tools we have at our disposal, and what is still missing to fully understand the mechanisms underlying enantioselective recognition.
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Affiliation(s)
- Paola Peluso
- Istituto di Chimica Biomolecolare ICB, CNR, Sede secondaria di Sassari, Traversa La Crucca 3, Regione Baldinca, Li Punti, I-07100 Sassari, Italy
| | - Bezhan Chankvetadze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences, Tbilisi State University, Chavchavadze Avenue 3, 0179 Tbilisi, Georgia
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12
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Dowarah J, Marak BN, Sran BS, Shah PK, Shukla PK, Singh VP. Synthesis of a Pyridone-Based Phthalimide Fleximer and Its Characterization and Supramolecular Property Evaluation. ACS OMEGA 2022; 7:24485-24497. [PMID: 35874266 PMCID: PMC9301638 DOI: 10.1021/acsomega.2c02095] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, a novel pyridone-based phthalimide fleximer, that is, ethyl 5-cyano-6-(3-(1,3-dioxoisoindolin-2-yl)propoxy)-4-(3-methoxyphenyl)-2-methylnicotinate, was synthesized, and its structure was established by the single-crystal X-ray diffraction method. The supramolecular self-assembly of the titled compound through noncovalent interactions was then investigated thoroughly. The titled compound crystallized with two symmetry-independent molecules (A and B, Z' = 2). In agreement with experimental observations, our density functional theory calculations also showed that the titled compound has a flexible motif and can occur in various conformations, including molecules A and B. The investigation of the supramolecular framework revealed that the molecules are notably bound by the nonclassical C-H···O and C-H···N hydrogen bonds and C-H···π interactions. Hirshfeld surface analysis was carried out to quantify the various intermolecular interactions. The dual anti-inflammatory activity of the tilted compound was also explored by molecular docking in the active sites of 5-LOX and COX-2 receptors, which revealed good binding affinities of -9.0 and -8.6 kcal/mol, respectively.
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Affiliation(s)
- Jayanta Dowarah
- Department
of Chemistry, School of Physical Sciences, Mizoram University, Aizawl 796004, Mizoram, India
| | - Brilliant N. Marak
- Department
of Chemistry, School of Physical Sciences, Mizoram University, Aizawl 796004, Mizoram, India
| | - Balkaran Singh Sran
- Department
of Chemistry, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | | | | | - Ved Prakash Singh
- Department
of Industrial Chemistry, School of Physical Sciences, Mizoram University, Aizawl 796004, Mizoram, India
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13
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Ebersbach B, Seichter W, Mazik M. Crystal structures of methyl 3,5-di-methyl-benzoate, 3,5-bis-(bromo-meth-yl)phenyl acetate and 5-hy-droxy-benzene-1,3-dicarbaldehyde. Acta Crystallogr E Crystallogr Commun 2022; 78:682-686. [PMID: 35855362 PMCID: PMC9260362 DOI: 10.1107/s2056989022005643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
The crystal structures of the title compounds, methyl 3,5-di-methyl-benzoate (C10H12O2; 1), 3,5-bis-(bromo-meth-yl)phenyl acetate (C10H10Br2O2; 2) and 5-hy-droxy-benzene-1,3-dicarbaldehyde (C8H6O3; 3) were determined by single-crystal X-ray analysis. The crystals of 1 are composed of strands of C-H⋯O=C bonded mol-ecules, which are further arranged into layers. As a result of the presence of two bromo-methyl substituents in compound 2, mol-ecular dimers formed by crystallographically non-equivalent mol-ecules are connected to structurally different two-dimensional aggregates in which the bromine atoms participate in Br⋯Br bonds of type I and type II. In the case of compound 3, which possesses three donor/acceptor substituents, the mol-ecular association in the crystal creates a close three-dimensional network comprising Car-yl-H⋯Ohy-droxy, Cform-yl-H⋯Oform-yl and O-H⋯Oform-yl bonds.
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Affiliation(s)
- Ben Ebersbach
- Technische Universität Bergakademie Freiberg, Leipziger Str. 29, D-09596 Freiberg/Sachsen, Germany
| | - Wilhelm Seichter
- Technische Universität Bergakademie Freiberg, Leipziger Str. 29, D-09596 Freiberg/Sachsen, Germany
| | - Monika Mazik
- Technische Universität Bergakademie Freiberg, Leipziger Str. 29, D-09596 Freiberg/Sachsen, Germany
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14
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15
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Niu S, Mao LL, Xiao H, Zhao Y, Tung CH, Wu LZ, Cong H. Adsorption of polyhaloalkane vapors by adaptive macrocycle crystals of WreathArene through C-halogen⋯π interactions. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Ethyl zinc 𝛽‐ketoiminates and 𝛽‐amidoenoates: The influence of precursor design on the deposition of highly conductive zinc oxide thin films via AACVD. Chempluschem 2022; 87:e202100537. [DOI: 10.1002/cplu.202100537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/26/2022] [Indexed: 11/07/2022]
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17
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Morisue M, Kawanishi M, Kusukawa T. Preferential solvation of meso-methyl BODIPYs with pyridine via pseudo-hydrogen-bonds. Phys Chem Chem Phys 2022; 24:3478-3485. [PMID: 35076038 DOI: 10.1039/d1cp05281k] [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
This study explored unexpected pseudo-hydrogen bond interactions between meso-methyl BODIPYs and pyridine or acridine. NMR spectral evidence indicated that the meso-methyl group and BF2 core of BODIPYs formed C-H⋯N and C-H⋯F-B pseudo-hydrogen bonds with pyridine, respectively. The weak binding strength was attributed to the preferential solvation of pyridine in the vicinity of meso-methyl BODIPYs in cyclohexane. The observations were explained by the formation of pseudo-hydrogen bonds based on the quantum theory of atoms in molecules (QTAIM) formalism. In contrast, acridine binds to BODIPY with a moderate binding strength. QTAIM formalism suggested the existence of the complementary pseudo-hydrogen bonds, which superficially seemed to rationalise the experimental observations. However, extensive NMR experiments have found no discrete geometry for the complex, indicating considerable geometric freedom. This discrepancy suggests that the static pictures based on the QTAIM analyses conflict with the enthalpy-entropy compensation principle in essential thermodynamics.
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Affiliation(s)
- Mitsuhiko Morisue
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Miho Kawanishi
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Takahiro Kusukawa
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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18
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Fan K, Bao S, Yu Z, Huang X, Liu Y, Kurmoo M, Zheng L. Engineering Heteronuclear Arrays from
Ir
III
‐Metalloligand
and
Co
II
Showing Coexistence of Slow Magnetization Relaxation and Photoluminescence. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Kun Fan
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Song‐Song Bao
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Zi‐Wen Yu
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Xin‐Da Huang
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Yu‐Jie Liu
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
| | - Mohamedally Kurmoo
- Institut de Chimie Université de Strasbourg CNRS‐UMR7177 4 rue Blaise Pascal Strasbourg Cedex 67007 France
| | - Li‐Min Zheng
- State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing Jiangsu 210023 China
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19
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Decato DA, Sun J, Boller MR, Berryman OB. Pushing the Limits of the Hydrogen Bond Enhanced Halogen Bond —The Case of the C–H Hydrogen Bond. Chem Sci 2022; 13:11156-11162. [PMID: 36320486 PMCID: PMC9516949 DOI: 10.1039/d2sc03792k] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/31/2022] [Indexed: 11/21/2022] Open
Abstract
C–H hydrogen bonds have remarkable impacts on various chemical systems. Here we consider the influence of C–H hydrogen bonds to iodine atoms. Positioning a methyl group between two iodine halogen bond donors of the receptor engendered intramolecular C–H hydrogen bonding (HBing) to the electron-rich belt of both halogen bond donors. When coupled with control molecules, the role of the C–H hydrogen bond was evaluated. Gas-phase density functional theory studies indicated that methyl C–H hydrogen bonds help bias a bidentate binding conformation. Interaction energy analysis suggested that the charged C–H donors augment the halogen bond interaction—producing a >10 kcal mol−1 enhancement over a control lacking the C–H⋯I–C interaction. X-ray crystallographic analysis demonstrated C–H hydrogen bonds and bidentate conformations with triflate and iodide anions, yet the steric bulk of the central functional group seems to impact the expected trends in halogen bond distance. In solution, anion titration data indicated elevated performance from the receptors that utilize C–H Hydrogen Bond enhanced Halogen Bonds (HBeXBs). Collectively, the results suggest that even modest hydrogen bonds between C–H donors and iodine acceptors can influence molecular structure and improve receptor performance. C–H hydrogen bonds to iodine halogen bond donors are shown to improve halogen bonding and molecular preorganization.![]()
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Affiliation(s)
| | - Jiyu Sun
- University of Montana 32 Campus Drive Missoula MT USA
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20
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Clustering of Aromatic Amino Acid Residues around Methionine in Proteins. Biomolecules 2021; 12:biom12010006. [PMID: 35053154 PMCID: PMC8774105 DOI: 10.3390/biom12010006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/14/2021] [Accepted: 12/18/2021] [Indexed: 12/31/2022] Open
Abstract
Short-range, non-covalent interactions between amino acid residues determine protein structures and contribute to protein functions in diverse ways. The interactions of the thioether of methionine with the aromatic rings of tyrosine, tryptophan, and/or phenylalanine has long been discussed and such interactions are favorable on the order of 1–3 kcal mol−1. Here, we carry out a new bioinformatics survey of known protein structures where we assay the propensity of three aromatic residues to localize around the [-CH2-S-CH3] of methionine. We term these groups “3-bridge clusters”. A dataset consisting of 33,819 proteins with less than 90% sequence identity was analyzed and such clusters were found in 4093 structures (or 12% of the non-redundant dataset). All sub-classes of enzymes were represented. A 3D coordinate analysis shows that most aromatic groups localize near the CH2 and CH3 of methionine. Quantum chemical calculations support that the 3-bridge clusters involve a network of interactions that involve the Met-S, Met-CH2, Met-CH3, and the π systems of nearby aromatic amino acid residues. Selected examples of proposed functions of 3-bridge clusters are discussed.
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21
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Zhao Y, Xiao H, Tung CH, Wu LZ, Cong H. Adsorptive separation of cyclohexanol and cyclohexanone by nonporous adaptive crystals of RhombicArene. Chem Sci 2021; 12:15528-15532. [PMID: 35003581 PMCID: PMC8654018 DOI: 10.1039/d1sc04728k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/21/2021] [Indexed: 11/21/2022] Open
Abstract
As feedstock chemicals with similar boiling points, cyclohexanol (CHOL) and cyclohexanone (CHON) are often obtained as mixtures during production processes. Separation of mixed CHOL and CHON is important but energy-consuming by distillation. Here we report the development of a new macrocycle RhombicArene, which forms a host-guest complex with CHON through C-H⋯π interactions and hydrogen bonds. The nonporous adaptive crystals of RhombicArene exhibit excellent capability for rapid (30 minutes), exclusive (>99.9%), and recyclable vapor adsorption of CHON in the presence of CHOL under mild and user-friendly conditions.
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Affiliation(s)
- Yongye Zhao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & School of Future Technology, University of Chinese Academy of Sciences Beijing 100190 China
| | - Hongyan Xiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & School of Future Technology, University of Chinese Academy of Sciences Beijing 100190 China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & School of Future Technology, University of Chinese Academy of Sciences Beijing 100190 China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & School of Future Technology, University of Chinese Academy of Sciences Beijing 100190 China
| | - Huan Cong
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & School of Future Technology, University of Chinese Academy of Sciences Beijing 100190 China
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22
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Abstract
At the heart of drug design is the discovery of molecules that bind with high affinity to their drug targets. Biotin forms the strongest known noncovalent ligand-protein interactions with avidin and streptavidin, achieving femtomolar and picomolar affinities, respectively. This is made even more exceptional because biotin achieves this with a meagre molecular weight of 240 Da. Surprisingly, the approaches by which biotin achieves this are not in the standard repertoire of current medicinal chemistry practice. Biotin's biggest lesson is the importance of nonclassical H-bonds in protein-ligand complexes. Most of biotin's affinity stems from its flexible valeric acid side chain that forms CH-π, CH-O, and classical H-bonds with the lipophilic region of the binding pocket. Biotin also utilizes an oxyanion hole, a sulfur-centered H-bond, and water solvation in the bound state to achieve its potency. The facets and advantages of biotin's approach to binding should be more widely adopted in drug design.
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Affiliation(s)
- Darryl B McConnell
- Discovery Research, Boehringer Ingelheim Regional Center Vienna GmbH & Co KG, 1120 Vienna, Austria
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23
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Abstract
Abstract
C23H28OSi, monoclinic, P21/c (no. 14), a = 14.2882(11) Å, b = 17.8169(10) Å, c = 7.6201(6) Å, β = 103.780(8)°, V = 1884.0(2) Å3, Z = 4, R
gt
(F) = 0.0538, wR
ref
(F
2) = 0.1241, T = 173(2) K.
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Affiliation(s)
- Jonathan O. Bauer
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg , Universitätsstraße 31, D-93053 Regensburg , Germany
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24
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Ionescu A, Godbert N, Termine R, La Deda M, Amati M, Lelj F, Crispini A, Golemme A, Ghedini M, Garcia-Orduña P, Aiello I. Photoconductive Properties and Electronic Structure in 3,5-Disubstituted 2-(2'-Pyridyl)Pyrroles Coordinated to a Pd(II) Salicylideneiminate Synthon. Inorg Chem 2021; 60:9287-9301. [PMID: 34126007 PMCID: PMC8277164 DOI: 10.1021/acs.inorgchem.0c02991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The synthesis and the electrochemical, photophysical, structural,
and photoconductive properties of three new heteroleptic Pd(II) complexes
with various 3′,5′- disubstituted-2-(2′-pyridil)
pyrroles H(N^N) as coordinated ligands are reported. The coordination
of the metal center was completed by a functionalized Schiff base
H(O^N) used as an ancillary ligand. The [(N^N)Pd(O^N)] complexes showed
highly interesting photoconductive properties which have been correlated
to their electronic and molecular structures. Theoretical density
functional theory (DFT) and time-dependent DFT calculations were performed,
and the results were confronted with the organization in crystalline
phase, allowing to point out that the photoconductive properties are
mainly a consequence of an efficient intramolecular ligand-to-metal
charge transfer, combined to the proximity between the central metal
and the donor moieties in the solid-state molecular stacks. The reported
results confirm that these new Pd(II) complexes form a novel class
of organometallic photoconductors with intrinsic characteristics suitable
for molecular semiconductors applications. The first evidence of enhancement of the role of d* orbitals
in improving photoconduction in crystalline Pd(II) complexes comprising
2-(2′-pyridyl)pyrroles.
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Affiliation(s)
- Andreea Ionescu
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.,CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy
| | - Nicolas Godbert
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
| | - Roberto Termine
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy
| | - Massimo La Deda
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.,CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy
| | - Mario Amati
- Dipartimento di Scienze and LASCAMM-CR INSTM, Unità INSTM della Basilicata, Università della Basilicata, 85100 Potenza, Italy
| | - Francesco Lelj
- Dipartimento di Scienze and LASCAMM-CR INSTM, Unità INSTM della Basilicata, Università della Basilicata, 85100 Potenza, Italy
| | - Alessandra Crispini
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
| | - Attilio Golemme
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy.,Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
| | - Mauro Ghedini
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.,CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy
| | - Pilar Garcia-Orduña
- Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, Pza. San Francisco s/n, Zaragoza 50009, Spain
| | - Iolinda Aiello
- MAT-INLAB (Laboratorio di Materiali Molecolari Inorganici) and LASCAMM-CR INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.,CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza, 87036 Arcavacata di Rende (CS), Italy
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25
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Weh M, Rühe J, Herbert B, Krause AM, Würthner F. Deracemization of Carbohelicenes by a Chiral Perylene Bisimide Cyclophane Template Catalyst. Angew Chem Int Ed Engl 2021; 60:15323-15327. [PMID: 33909943 PMCID: PMC8362091 DOI: 10.1002/anie.202104591] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Indexed: 12/16/2022]
Abstract
Deracemization describes the conversion of a racemic mixture of a chiral molecule into an enantioenriched mixture or an enantiopure compound without structural modifications. Herein, we report an inherently chiral perylene bisimide (PBI) cyclophane whose chiral pocket is capable of transforming a racemic mixture of [5]-helicene into an enantioenriched mixture with an enantiomeric excess of 66 %. UV/Vis and fluorescence titration studies reveal this cyclophane host composed of two helically twisted PBI dyes has high binding affinities for the respective homochiral carbohelicene guests, with outstanding binding constants of up to 3.9×1010 m-1 for [4]-helicene. 2D NMR studies and single-crystal X-ray analysis demonstrate that the observed strong and enantioselective binding of homochiral carbohelicenes and the successful template-catalyzed deracemization of [5]-helicene can be explained by the enzyme-like perfect shape complementarity of the macrocyclic supramolecular host.
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Affiliation(s)
- Manuel Weh
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jessica Rühe
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Benedikt Herbert
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ana-Maria Krause
- Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074, Würzburg, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074, Würzburg, Germany
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26
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Tsymbal LV, Rodik RV, Danylyuk O, Suwinska K, Lipkowski J, Kalchenko VI, Lampeka YD. Supramolecular interactions in the heteroarylimine-substituted calix[4]arenes: the formation of cyclic dodecanuclear palladium aggregates. Supramol Chem 2021. [DOI: 10.1080/10610278.2021.1944632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Lyudmila V. Tsymbal
- Department of Physical Inorganic Chemistry, L.V.Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Roman V. Rodik
- Department of Chemistry of Phosphoranes, Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Oksana Danylyuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Kinga Suwinska
- Faculty of Mathematics and Natural Sciences, Cardinal Stefan Wyszynski University in Warsaw, Warsaw, Poland
| | - Janusz Lipkowski
- Faculty of Mathematics and Natural Sciences, Cardinal Stefan Wyszynski University in Warsaw, Warsaw, Poland
| | - Vitaly I. Kalchenko
- Department of Chemistry of Phosphoranes, Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Yaroslaw D. Lampeka
- Department of Physical Inorganic Chemistry, L.V.Pisarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
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27
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Bauer JO, Espinosa‐Jalapa NA, Fontana N, Götz T, Falk A. Functional Group Variation in
tert
‐Butyldiphenylsilanes (TBDPS): Syntheses, Reactivities, and Effects on the Intermolecular Interaction Pattern in the Molecular Crystalline State. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jonathan O. Bauer
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Noel Angel Espinosa‐Jalapa
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Nicolò Fontana
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Tobias Götz
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Alexander Falk
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
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28
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Ortega E, Pérez-Arnaiz C, Rodríguez V, Janiak C, Busto N, García B, Ruiz J. A 2-(benzothiazol-2-yl)-phenolato platinum(II) complex as potential photosensitizer for combating bacterial infections in lung cancer chemotherapy†. Eur J Med Chem 2021; 222:113600. [PMID: 34144355 DOI: 10.1016/j.ejmech.2021.113600] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/04/2021] [Accepted: 05/30/2021] [Indexed: 02/07/2023]
Abstract
Cancer and antibiotic resistance are two global health threats that usually hamper clinical chemotherapeutic efficacy. Particularly for lung cancer, bacterial infections frequently arise thereby complicating the course of cancer treatment. In this sense, three new neutral luminescent cycloplatinated(II) photosensitizers of the type [Pt(dmba)(L)] (dmba = N,N-dimethylbenzylamine-κN,κC; L = 2-(benzo[d]oxazol-2-yl)-phenolato-κN,κO1, 2-(benzo[d]thiazol-2-yl)-phenolato-κN,κO2, and 2-(1-methyl-1H-benzo[d]imidazole-2-yl)phenolato-κN,κO3) have been characterized and developed to potentially eliminate both resistant bacteria and lung cancer cells. The phototherapeutic effects of complex 2 have been evaluated using low doses of blue light irradiation. Complex 2 exerted promising photoactivity against pathogenic Gram-positive bacteria strains of clinical interest, displaying a phototoxic index (PI) of 15 for methicillin-resistant Staphylococcus aureus, one of the major microorganisms predominating lung infections. Likewise, the anticancer activity of 2 was also increased upon light irradiation in human lung A549 cancer cells (PI = 36). Further in vitro experiments with this platinum(II) complex suggest that ROS-generating photodynamic reactions were involved upon light irradiation, thus providing a reasonable mechanism for its dual anticancer and antibacterial activities.
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Affiliation(s)
- Enrique Ortega
- Departamento de Química Inorgánica, Universidad de Murcia and Institute for Bio-Health Research of Murcia (IMIB-Arrixaca), E-30071, Murcia, Spain
| | - Cristina Pérez-Arnaiz
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos S/n, E-09001, Burgos, Spain
| | - Venancio Rodríguez
- Departamento de Química Inorgánica, Universidad de Murcia and Institute for Bio-Health Research of Murcia (IMIB-Arrixaca), E-30071, Murcia, Spain
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstr 1, 40225, Düsseldorf, Germany.
| | - Natalia Busto
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos S/n, E-09001, Burgos, Spain.
| | - Begoña García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos S/n, E-09001, Burgos, Spain.
| | - José Ruiz
- Departamento de Química Inorgánica, Universidad de Murcia and Institute for Bio-Health Research of Murcia (IMIB-Arrixaca), E-30071, Murcia, Spain.
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29
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Weh M, Rühe J, Herbert B, Krause A, Würthner F. Deracemization of Carbohelicenes by a Chiral Perylene Bisimide Cyclophane Template Catalyst. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104591] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Manuel Weh
- Institut für Organische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Jessica Rühe
- Institut für Organische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Benedikt Herbert
- Institut für Organische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Ana‐Maria Krause
- Center for Nanosystems Chemistry (CNC) Universität Würzburg Theodor-Boveri-Weg 97074 Würzburg Germany
| | - Frank Würthner
- Institut für Organische Chemie Universität Würzburg Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry (CNC) Universität Würzburg Theodor-Boveri-Weg 97074 Würzburg Germany
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30
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Seidel P, Seichter W, Schwarzer A, Mazik M. Fluorene Derivatives Bearing Two to Seven Phthalimidomethyl Groups: Syntheses, Crystal Structures and Conversion to Amines. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Pierre Seidel
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Anke Schwarzer
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Monika Mazik
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
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31
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Pandey SK. Computational Study on the Structure, Stability, and Electronic Feature Analyses of Trapped Halocarbons inside a Novel Bispyrazole Organic Molecular Cage. ACS OMEGA 2021; 6:11711-11728. [PMID: 34056325 PMCID: PMC8154030 DOI: 10.1021/acsomega.1c01019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/02/2021] [Indexed: 05/23/2023]
Abstract
Computational experiments on a novel crystal (Bharadwaj et al. Cryst. Growth Des. 2019, 19, 369-375) having a series of seven host-guest complexes (HGCs) where the host species belong to the family of a novel bispyrazole organic cryptand (BPOC) and their structural, stability, and the electronic feature analyses have been reported using the quantum chemical calculation approach. This report systematically unravels an inclusive theory-based experiment on the well-known guest solvents (S) like halocarbon solvents [CCl4, CHCl3/CHCl3' (two orientations), CH2Cl2 , C2H4Cl2 , C2H4Br2 , and C2HCl3 ] and a few model chlorofluorocarbons (CFCs) (CClF3 , CCl2F2 , and CCl3F) trapped inside the host (BPOC) cryptand, which are the crux in forming the structures of biological and supramolecular systems. Using the implicitly dispersion-corrected DFT (M06-2X/6-31G*) approach, the BPOC molecular cage and its host-guest capabilities were evaluated for the encapsulation of the above said halocarbon solvents as well as the CFC models. The encapsulated C2H4Br2 solvent inside the BPOC cage is found to be the most stable among all the HGCs; however, common in the solid phase, similar binary complexes have not been formerly examined in any gas/solvent-phase studies of the BPOC host species. Moreover, very interestingly, the stability pattern of the host-guest complexes enhances for the CFC models when the number of Cl atoms is increased. As the halogenated solvents through halogen and H-bonding are very decisive in understanding and controlling chemical reactions, the NCI-plots support the presence of the halogen bonding (C-Cl/Br···π) and H-bonding (C-H···π) interactions playing an imperative role in stabilizing the guests (solvents) inside the hydrophobic cavity. To get more insights, the HOMO-LUMO and MESP plots as well as natural population analyses have also been highlighted. This theoretical study portrays an inclusive information about the structural, stability, and electronic feature analyses of the host-guest assemblies consisting of the halogen and H-bonding interactions at the atomic level where the influences of such halocarbon solvents play crucial roles in comprehending and managing chemical reactions.
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Affiliation(s)
- Sarvesh Kumar Pandey
- Department
of Inorganic & Physical Chemistry, Indian
Institute of Science Bangalore, Bengaluru, Karnataka 560 012, India
- Department
of Chemistry, Indian Institute of Technology
Kanpu, Kanpur, Uttar Pradesh 208 016, India
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32
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The account of atom-pair dispersion interaction on the stabilization of C–H/π bound phenylacetylene–hydrocarbon complexes. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02757-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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33
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Fluorescence-based investigations of the host–guest inclusion of anilinonaphthalene sulfonic acids (1,8- and 2,6-ANS) by dimethoxypillar[5]arene in nonaqueous solvents. J INCL PHENOM MACRO 2021. [DOI: 10.1007/s10847-021-01063-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Heteroleptic [Cu(P^P)(N^N)][PF6] Complexes: Effects of Isomer Switching from 2,2′-biquinoline to 1,1′-biisoquinoline. CRYSTALS 2021. [DOI: 10.3390/cryst11020185] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The preparation and characterization of [Cu(POP)(biq)][PF6] and [Cu(xantphos)(biq)][PF6] are reported (biq = 1,1′-biisoquinoline, POP = bis(2-(diphenylphosphanyl)phenyl)ether, and xantphos = (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane). The single crystal structure of [Cu(POP)(biq)][PF6] 0.5Et2O was determined and compared to that in three salts of [Cu(POP)(bq)]+ in which bq = 2,2′-biquinoline. The P–C–P angle is 114.456(19)o in [Cu(POP)(biq)]+ compared to a range of 118.29(3)–119.60(3)o [Cu(POP)(bq)]+. There is a change from an intra-POP PPh2-phenyl/(C6H4)2O-arene π-stacking in [Cu(POP)(biq)]+ to a π-stacking contact between the POP and bq ligands in [Cu(POP)(bq)]+. In solution and at ambient temperatures, the [Cu(POP)(biq)][PF6]+ and [Cu(xantphos)(biq)]+ cations undergo several concurrent dynamic processes, as evidenced in their multinuclear NMR spectra. The photophysical and electrochemical behaviors of the heteroleptic copper (I) complexes were investigated, and the effects of changing from bq to biq are described. Short Cu···O distances within the [Cu(POP)(biq)]+ and [Cu(xantphos)(biq)]+ cations may contribute to their very low photoluminescent quantum yields.
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35
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Tiekink ERT. Supramolecular architectures sustained by delocalised C–I⋯π(arene) interactions in molecular crystals and the propensity of their formation. CrystEngComm 2021. [DOI: 10.1039/d0ce01677b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A survey of delocalised C–I⋯π(chelate ring) interactions is presented.
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Affiliation(s)
- Edward R. T. Tiekink
- Research Centre for Crystalline Materials
- School of Science and Technology
- Sunway University
- Bandar Sunway
- Malaysia
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36
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Tabasi ZA, Walsh JC, Bodwell GJ, Thompson DW, Zhao Y. Comparative study of the photophysical and crystallographic properties of 4-(9 H-pyreno[4,5- d]imidazol-10-yl)phenol and its alkylated derivatives. NEW J CHEM 2021. [DOI: 10.1039/d1nj01102b] [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
The photophysical and crystallographic properties of a para-hydroxphenyl-substituted pyrenoimidazole and its decylated analogues were investigated. The fluorescence of these compounds is sensitive to environmental acidity and basicity.
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Affiliation(s)
- Zahra A. Tabasi
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | - Joshua C. Walsh
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | - Graham J. Bodwell
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | - David W. Thompson
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | - Yuming Zhao
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
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37
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Aryaeifar M, Amiri Rudbari H, Blacque O, Islam MK, Scopelliti R, Braun JD, Herbert DE, Bruno G, Janiak C, Enamullah M. Schiff base ligands derived from 1,2-bis(2′-nitro-/amino-phenoxy)-3-R-benzene and 2-hydroxy-1-naphthaldehyde and their Cu/Zn( ii) complexes: synthesis, characterization, X-ray structures and computational studies. CrystEngComm 2021. [DOI: 10.1039/d1ce00829c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Racemic crystals of Cu/Zn(ii)-tetradentate Schiff base ligands with Λ/Δ-chirality induction at-metal center.
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Affiliation(s)
- Mahnaz Aryaeifar
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Hadi Amiri Rudbari
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
| | | | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jason D. Braun
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - David E. Herbert
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Giuseppe Bruno
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres 31, I-98166 Messina, Italy
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany
| | - Mohammed Enamullah
- Department of Chemistry, Jahangirnagar University, Dhaka 1342, Bangladesh
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38
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Capilato JN, Siegler MA, Rowshanpour R, Dudding T, Lectka T. Cooperative Noncovalent Interactions Lead to a Highly Diastereoselective Sulfonyl-Directed Fluorination of Steroidal α,β-Unsaturated Hydrazones. J Org Chem 2021; 86:1300-1307. [PMID: 33300794 DOI: 10.1021/acs.joc.0c02716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of steroidal α,β-unsaturated hydrazones is presented whose behavior and reactivity are governed by various types of weak C-H hydrogen bonds. Several interesting features in a representative X-ray crystal structure and 1H NMR spectrum are examined that provide evidence for a unique bifurcated intramolecular C-H interaction. Moreover, these steroid derivatives undergo functionalization in the form of a highly regio- and stereoselective fluorination; the sulfonyl oxygen atoms are proposed to direct the fluorinating reagent through C-H hydrogen bonds.
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Affiliation(s)
- Joseph N Capilato
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rozhin Rowshanpour
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Travis Dudding
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Thomas Lectka
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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39
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Köhler L, Seichter W, Mazik M. Complexes Formed between Artificial Receptors and β‐Glucopyranoside in the Crystalline State. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Linda Köhler
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Monika Mazik
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
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40
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Interplay of weak intermolecular interactions in two Schiff's bases with organic fluorine derived from 5-nitrothiophene-2-carboxaldehyde: Crystal structures, DFT calculation and in vitro evaluation of bioactivities. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128883] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Anizaim AH, Zainuri DA, Zaini MF, Razak IA, Bakhtiar H, Arshad S. Comparative analyses of new donor-π-acceptor ferrocenyl-chalcones containing fluoro and methoxy-fluoro acceptor units as synthesized dyes for organic solar cell material. PLoS One 2020; 15:e0241113. [PMID: 33147247 PMCID: PMC7641456 DOI: 10.1371/journal.pone.0241113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/09/2020] [Indexed: 11/29/2022] Open
Abstract
Two organometallic compounds known as (E)-1-ferrocenyl-(3-fluorophenyl)prop-2-en-1-one (Fc1) and (E)-1-ferrocenyl-(3-fluoro-4-methoxyphenyl)prop-2-en-1-one (Fc2) are designed and synthesized for application in dye-sensitized solar cell (DSSC) based on a donor-π-acceptor (D-π-A) architecture. By strategically introducing a methoxy group into the acceptor side of the compound, Fc2 which has adopted a D-π-A-AD structure are compared with the basic D-π-A structure of Fc1. Both compounds were characterized by utilizing the IR, NMR and UV-Vis methods. Target compounds were further investigated by X-ray analysis and studied computationally using Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) approaches to explore their potential performances in DSSCs. An additional methoxy group has been proven in enhancing intramolecular charge transfer (ICT) by improving the planarity of Fc2 backbone. This good electronic communication leads to higher HOMO energy level, larger dipole moment and better short-circuit current density (Jsc) values. Eventually, the presence of methoxy group in Fc2 has improved the conversion efficiency as in comparison to Fc1 under the same conditions.
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Affiliation(s)
- Ainizatul Husna Anizaim
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, USM, Gelugor, Penang, Malaysia
| | - Dian Alwani Zainuri
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, USM, Gelugor, Penang, Malaysia
| | - Muhamad Fikri Zaini
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, USM, Gelugor, Penang, Malaysia
| | - Ibrahim Abdul Razak
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, USM, Gelugor, Penang, Malaysia
| | - Hazri Bakhtiar
- Laser Center, Ibnu Sina Institute for Scientific and Industrial Research (ISI-SIR), Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia
- Department of Physics, Faculty of Sciences, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia
| | - Suhana Arshad
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, USM, Gelugor, Penang, Malaysia
- * E-mail:
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42
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Tanaka D, Tsutsui Y, Konishi A, Nakaoka K, Nakajima H, Baba A, Chiba K, Yasuda M. Selective Activation of Aromatic Aldehydes Promoted by Dispersion Interactions: Steric and Electronic Factors of a π-Pocket within Cage-Shaped Borates for Molecular Recognition. Chemistry 2020; 26:15023-15034. [PMID: 32870540 DOI: 10.1002/chem.202003594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Indexed: 12/13/2022]
Abstract
Selective bond formations are one of the most important reactions in organic synthesis. In the Lewis acid mediated electrophile reactions of carbonyls, the selective formation of a carbonyl-acid complex plays a critical role in determining selectivity, which is based on the difference in the coordinative interaction between the carbonyl and Lewis acid center. Although this strategy has attained progress in selective bond formations, the discrimination between similarly sized aromatic and aliphatic carbonyls that have no functional anchors to strongly interact with the metal center still remains a challenging issue. Herein, this work focuses on molecular recognition driven by dispersion interactions within some aromatic moieties. A Lewis acid catalyst with a π-space cavity, which is referred to as a π-pocket, as the recognition site for aromatic carbonyls is designed. Cage-shaped borates 1B with various π-pockets demonstrated significant chemoselectivity for aromatic aldehydes 3 b-f over that of aliphatic 3 a in competitive hetero-Diels-Alder reactions. The effectiveness of our catalysts was also evidenced by intramolecular recognition of the aromatic carbonyl within a dicarbonyl substrate. Mechanistic and theoretical studies demonstrated that the selective activation of aromatic substrates was driven by the preorganization step with a larger dispersion interaction, rather than the rate-determining step of the C-C bond formation, and this was likely to contribute to the preferred activation of aromatic substrates over that of aliphatic ones.
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Affiliation(s)
- Daiki Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Yuya Tsutsui
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Akihito Konishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan.,Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Koichi Nakaoka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Hideto Nakajima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Akio Baba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
| | - Kouji Chiba
- Material Science Division, MOLSIS Inc., 1-28-38 Shinkawa, Chuo-ku, Tokyo, 1040033, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 5650871, Japan
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43
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Stapf M, Seichter W, Mazik M. Cycloalkyl Groups as Subunits of Artificial Carbohydrate Receptors: Effect of Ring Size of the Cycloalkyl Unit on the Receptor Efficiency. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000803] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Manuel Stapf
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Wilhelm Seichter
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
| | - Monika Mazik
- Institut für Organische Chemie Technische Universität Bergakademie Freiberg Leipziger Strasse 29 09599 Freiberg Germany
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44
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Grosu IG, Filip X, Miclăuș MO, Filip C. Hydrogen-Mediated Noncovalent Interactions in Solids: What Can NMR Crystallography Tell About? Molecules 2020; 25:E3757. [PMID: 32824749 PMCID: PMC7463941 DOI: 10.3390/molecules25163757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/15/2020] [Accepted: 08/16/2020] [Indexed: 12/18/2022] Open
Abstract
Hydrogen atoms play a crucial role in the aggregation of organic (bio)molecules through diverse number of noncovalent interactions that they mediate, such as electrostatic in proton transfer systems, hydrogen bonding, and CH-π interactions, to mention only the most prominent. To identify and adequately describe such low-energy interactions, increasingly sensitive methods have been developed over time, among which quantum chemical computations have witnessed impressive advances in recent years. For reaching the present state-of-the-art, computations had to rely on a pool of relevant experimental data, needed at least for validation, if not also for other purposes. In the case of molecular crystals, the best illustration for the synergy between computations and experiment is given by the so-called NMR crystallography approach. Originally designed to increase the confidence level in crystal structure determination of organic compounds from powders, NMR crystallography is able now to offer also a wealth of information regarding the noncovalent interactions that drive molecules to pack in a given crystalline pattern or another. This is particularly true for the noncovalent interactions which depend on the exact location of labile hydrogen atoms in the system: in such cases, NMR crystallography represents a valuable characterization tool, in some cases complementing even the standard single-crystal X-ray diffraction technique. A concise introduction in the field is made in this mini-review, which is aimed at providing a comprehensive picture with respect to the current accuracy level reached by NMR crystallography in the characterization of hydrogen-mediated noncovalent interactions in organic solids. Different types of practical applications are illustrated with the example of molecular crystals studied by our research group, but references to other representative developments reported in the literature are also made. By summarizing the major concepts and methodological progresses, the present work is also intended to be a guide to the practical potential of this relatively recent analytical tool for the scientists working in areas where crystal engineering represents the main approach for rational design of novel materials.
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Affiliation(s)
| | | | | | - Claudiu Filip
- National Institute for R&D of Isotopic and Molecular Technologies, 400293 Cluj, Romania; (I.G.G.); (X.F.); (M.O.M.)
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45
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Wisser B, Labahn A, Näther C, Janiak C. Supramolecular Ammine‐Copper
rac
‐BINOLAT Salts through in‐situ
R
‐ or
S
‐BINOL Racemization. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Barbara Wisser
- Institut für Anorganische und Analytische Chemie Albert‐Ludwigs‐Universität Freiburg 79104 Freiburg Germany
| | - Andreas Labahn
- Institut für Physikalische Chemie Albert‐Ludwigs‐Universität Freiburg 79104 Freiburg Germany
| | - Christian Näther
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität Kiel 24098 Kiel Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität Düsseldorf 40204 Düsseldorf Germany
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46
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Petkowski JJ, Bains W, Seager S. On the Potential of Silicon as a Building Block for Life. Life (Basel) 2020; 10:E84. [PMID: 32532048 PMCID: PMC7345352 DOI: 10.3390/life10060084] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 12/21/2022] Open
Abstract
Despite more than one hundred years of work on organosilicon chemistry, the basis for the plausibility of silicon-based life has never been systematically addressed nor objectively reviewed. We provide a comprehensive assessment of the possibility of silicon-based biochemistry, based on a review of what is known and what has been modeled, even including speculative work. We assess whether or not silicon chemistry meets the requirements for chemical diversity and reactivity as compared to carbon. To expand the possibility of plausible silicon biochemistry, we explore silicon's chemical complexity in diverse solvents found in planetary environments, including water, cryosolvents, and sulfuric acid. In no environment is a life based primarily around silicon chemistry a plausible option. We find that in a water-rich environment silicon's chemical capacity is highly limited due to ubiquitous silica formation; silicon can likely only be used as a rare and specialized heteroatom. Cryosolvents (e.g., liquid N2) provide extremely low solubility of all molecules, including organosilicons. Sulfuric acid, surprisingly, appears to be able to support a much larger diversity of organosilicon chemistry than water.
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Affiliation(s)
- Janusz Jurand Petkowski
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - William Bains
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
| | - Sara Seager
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA; (W.B.); (S.S.)
- Department of Physics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
- Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
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47
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Knedel TO, Buss S, Maisuls I, Daniliuc CG, Schlüsener C, Brandt P, Weingart O, Vollrath A, Janiak C, Strassert CA. Encapsulation of Phosphorescent Pt(II) Complexes in Zn-Based Metal–Organic Frameworks toward Oxygen-Sensing Porous Materials. Inorg Chem 2020; 59:7252-7264. [DOI: 10.1021/acs.inorgchem.0c00678] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Tim-Oliver Knedel
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Stefan Buss
- CiMIC, SoN, Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, 48149 Münster, Germany
| | - Iván Maisuls
- CiMIC, SoN, Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, 48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Correnstraße 40, 48149 Münster, Germany
| | - Carsten Schlüsener
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Philipp Brandt
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Oliver Weingart
- Institut für Theoretische Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Annette Vollrath
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Cristian A. Strassert
- CiMIC, SoN, Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, 48149 Münster, Germany
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48
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Essential meaning of high pressure measurements in discerning the properties of monohydroxy alcohols with a single phenyl group. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112863] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Purtsas A, Stipurin S, Kataeva O, Knölker HJ. Iron-Catalyzed Synthesis, Structure, and Photophysical Properties of Tetraarylnaphthidines. Molecules 2020; 25:molecules25071608. [PMID: 32244577 PMCID: PMC7181034 DOI: 10.3390/molecules25071608] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/26/2020] [Accepted: 03/29/2020] [Indexed: 12/16/2022] Open
Abstract
We describe the synthesis and photophysical properties of tetraarylnaphthidines. Our synthetic approach is based on an iron-catalyzed oxidative C-C coupling reaction as the key step using a hexadecafluorinated iron-phthalocyanine complex as a catalyst and air as the sole oxidant. The N,N,N',N'-tetraarylnaphthidines proved to be highly fluorescent with quantum yields of up to 68%.
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Affiliation(s)
- Alexander Purtsas
- Faculty of Chemistry, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany; (A.P.); (S.S.)
| | - Sergej Stipurin
- Faculty of Chemistry, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany; (A.P.); (S.S.)
| | - Olga Kataeva
- A. E. Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov Str. 8, 420088 Kazan, Russia;
| | - Hans-Joachim Knölker
- Faculty of Chemistry, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany; (A.P.); (S.S.)
- Correspondence: ; Fax: +49-351-463-37030
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50
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Enamullah M, Islam MK, Höfert SP, Janiak C. Syntheses, spectroscopy, tautomerism, induced chirality and molecular structure of 3-(o/p-tolylimino)indolin-2-one and bis[3-(o/p-tolylimino)indole-2-olato-κ2N,O]-Δ/Λ-zinc(II). Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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