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Poller MJ, Bönisch S, Bertleff B, Raabe J, Görling A, Albert J. Elucidating activating and deactivating effects of carboxylic acids on polyoxometalate-catalysed three-phase liquid–liquid-gas reactions. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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2
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Reger D, Haines P, Amsharov KY, Schmidt JA, Ullrich T, Bönisch S, Hampel F, Görling A, Nelson J, Jelfs KE, Guldi DM, Jux N. A Family of Superhelicenes: Easily Tunable, Chiral Nanographenes by Merging Helicity with Planar π Systems. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103253] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- David Reger
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Philipp Haines
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Konstantin Y. Amsharov
- Institute for Organic Chemistry Martin Luther University Halle-Wittenberg Kurt-Mothes-Straße 2 06120 Halle Germany
| | - Julia A. Schmidt
- Department of Chemistry Molecular Sciences Research Hub Imperial College London White City Campus, Wood Lane London W12 0BZ UK
| | - Tobias Ullrich
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Simon Bönisch
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Frank Hampel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Andreas Görling
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Jenny Nelson
- Department of Physics Imperial College London South Kensington Campus London SW7 2AZ UK
| | - Kim E. Jelfs
- Department of Chemistry Molecular Sciences Research Hub Imperial College London White City Campus, Wood Lane London W12 0BZ UK
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
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3
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Reger D, Haines P, Amsharov KY, Schmidt JA, Ullrich T, Bönisch S, Hampel F, Görling A, Nelson J, Jelfs KE, Guldi DM, Jux N. A Family of Superhelicenes: Easily Tunable, Chiral Nanographenes by Merging Helicity with Planar π Systems. Angew Chem Int Ed Engl 2021; 60:18073-18081. [PMID: 34014601 PMCID: PMC8456895 DOI: 10.1002/anie.202103253] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/22/2021] [Indexed: 01/01/2023]
Abstract
We designed a straightforward synthetic route towards a full-fledged family of π-extended helicenes: superhelicenes. They have two hexa-peri-hexabenzocoronenes (HBCs) in common that are connected via a central five-membered ring. By means of structurally altering this 5-membered ring, we realized a versatile library of molecular building blocks. Not only the superhelicene structure, but also their features are tuned with ease. In-depth physico-chemical characterizations served as a proof of concept thereof. The superhelicene enantiomers were separated, their circular dichroism was measured in preliminary studies and concluded with an enantiomeric assignment. Our work was rounded-off by crystal structure analyses. Mixed stacks of M- and P-isomers led to twisted molecular wires. Using such stacks, charge-carrier mobilities were calculated, giving reason to expect outstanding hole transporting properties.
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Affiliation(s)
- David Reger
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Philipp Haines
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Konstantin Y. Amsharov
- Institute for Organic ChemistryMartin Luther University Halle-WittenbergKurt-Mothes-Straße 206120HalleGermany
| | - Julia A. Schmidt
- Department of ChemistryMolecular Sciences Research HubImperial College LondonWhite City Campus, Wood LaneLondonW12 0BZUK
| | - Tobias Ullrich
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Simon Bönisch
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Frank Hampel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Andreas Görling
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Jenny Nelson
- Department of PhysicsImperial College LondonSouth Kensington CampusLondonSW7 2AZUK
| | - Kim E. Jelfs
- Department of ChemistryMolecular Sciences Research HubImperial College LondonWhite City Campus, Wood LaneLondonW12 0BZUK
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
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4
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Plass F, Bönisch S, Held F, Ullrich T, Fischer FEJ, Guryev A, Görling A, Kahnt A, Tsogoeva SB. Controlling and Fine-Tuning Charge-Transfer Emission in 2,6-Dicyanoaniline Multichromophores Prepared through Domino Reactions: Entry to a Potentially New Class of OLEDs. J Org Chem 2021; 86:6111-6125. [PMID: 33843224 DOI: 10.1021/acs.joc.0c02944] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Substituted 2,6-dicyanoanilines are versatile electron donor-acceptor compounds, which have recently received considerable attention, since they exhibit strong fluorescence and may have utility in the synthesis of fluorescent materials, non-natural photosynthetic systems, and materials with nonlinear optical properties. The majority of known synthetic procedures are, however, "stop-and-go" reaction processes involving time-consuming and waste-producing isolation and purification of product intermediates. Here, we present the synthesis of substituted 2,6-dicyanoanilines via atom-economical and eco-friendly one-pot processes, involving metal-free domino reactions, and their subsequent photochemical and photophysical measurements and theoretical calculations. These studies exhibit the existence of an easily tunable radical ion pair-based charge-transfer (CT) emission in the synthesized 2,6-dicyanoaniline-based electron donor-acceptor systems. The charge-transfer processes were explored by photochemical and radiation chemical measurements, in particular, based on femtosecond laser photolysis transient absorption spectroscopy and time-resolved emission spectroscopy, accompanied by pulse radiolysis and complemented by quantum chemical investigations employing time-dependent density-functional theory. This chromophore class exhibits a broad-wavelength-range fine-tunable charge recombination emission with high photoluminescence quantum yields up to 0.98. Together with its rather simple and cost-effective synthesis (using easily available starting materials) and customizable properties, it renders this class of compounds feasible candidates as potential dyes for future optoelectronic devices like organic light-emitting diodes (OLEDs).
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Affiliation(s)
- Fabian Plass
- Physical Chemistry Chair I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany.,Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, 04318 Leipzig, Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Felix Held
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Tobias Ullrich
- Physical Chemistry Chair I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Florian E J Fischer
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Anton Guryev
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Axel Kahnt
- Physical Chemistry Chair I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany.,Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, 04318 Leipzig, Germany
| | - Svetlana B Tsogoeva
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
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5
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Grau BW, Bönisch S, Neuhauser A, Hampel F, Görling A, Tsogoeva SB. Facile Access to Challenging
ortho
‐Terphenyls via Merging Two Multi‐Step Domino Reactions in One‐Pot: A Joint Experimental/Theoretical Study. ChemCatChem 2019. [DOI: 10.1002/cctc.201900746] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Benedikt W. Grau
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Alexander Neuhauser
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Frank Hampel
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
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6
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Dittrich T, Garcia Vera O, Fengler S, Pineda S, Bönisch S. Extraction of source functions of surface photovoltage transients at very short times. Rev Sci Instrum 2019; 90:026102. [PMID: 30831743 DOI: 10.1063/1.5068749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/17/2019] [Indexed: 06/09/2023]
Abstract
The measurement of surface photovoltage (SPV) transients over 12 orders of magnitude in time was recently demonstrated [Rev. Sci. Instrum. 88, 053904 (2017)]. In dedicated experiments, however, a high-impedance buffer shall be placed outside the measurement chamber, which has consequences for SPV measurements at very short times. By varying the LCR circuit of a measurement configuration, applying a multi-parameter fit and simulating the corresponding SPV transients, we show, on the examples of highly doped silicon and a CdS thin film, that the source function of SPV transients can be reconstructed with a resolution time better than 1 ns.
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Affiliation(s)
- Th Dittrich
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut für Si-Photovoltaik, Kekuléstr. 5, D-12489 Berlin, Germany
| | - O Garcia Vera
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut für Si-Photovoltaik, Kekuléstr. 5, D-12489 Berlin, Germany
| | - S Fengler
- Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung, Institut für Werkstoffforschung, Max-Planck-Str. 1, D-21502 Geesthacht, Germany
| | - S Pineda
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut für Si-Photovoltaik, Kekuléstr. 5, D-12489 Berlin, Germany
| | - S Bönisch
- Brandenburgische Technische Universität Cottbus-Senftenberg, Fakultät 3, Universitätsplatz 1, D-01968 Senftenberg, Germany
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Bock CM, Parameshwarappa G, Bönisch S, Bauer W, Hutterer C, Leidenberger M, Friedrich O, Marschall M, Kappes B, Görling A, Tsogoeva SB. Back Cover: Deeper Insight into the Six-Step Domino Reaction of Aldehydes with Malononitrile and Evaluation of Antiviral and Antimalarial Activities of the Obtained Bicyclic Products (ChemistryOpen 3/2017). ChemistryOpen 2017. [PMCID: PMC5474649 DOI: 10.1002/open.201700092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The Back Cover picture highlights the easy generation of complex azabicyclic and carbobicyclic molecules from two simple compounds in a single operation through a highly efficient six‐step domino reaction. Within a multi‐step domino reaction, one transformation triggers the next, similar to a row of dominoes where one tile hits the next. The in vitro studies against the herpes virus and malaria reveal domino products as highly active compounds, outperforming the clinical reference drugs ganciclovir and chloroquine. More information can be found in the Full Paper by S. B. Tsogoeva and co‐workers on page 364 in Issue 3, 2017 (10.1002/open.201700005).![]()
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Affiliation(s)
- Christina M. Bock
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-University Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Gangajji Parameshwarappa
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-University Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 3 91058 Erlangen Germany
| | - Walter Bauer
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-University Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Corina Hutterer
- Institute for Clinical and Molecular Virology; Friedrich-Alexander-Universität Erlangen-Nürnberg; Schlossgarten 4 91054 Erlangen Germany
| | - Maria Leidenberger
- Institute of Medical Biotechnology; Friedrich-Alexander-Universität Erlangen-Nürnberg; Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Oliver Friedrich
- Institute of Medical Biotechnology; Friedrich-Alexander-Universität Erlangen-Nürnberg; Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Manfred Marschall
- Institute for Clinical and Molecular Virology; Friedrich-Alexander-Universität Erlangen-Nürnberg; Schlossgarten 4 91054 Erlangen Germany
| | - Barbara Kappes
- Institute of Medical Biotechnology; Friedrich-Alexander-Universität Erlangen-Nürnberg; Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 3 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-University Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
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8
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Bock CM, Parameshwarappa G, Bönisch S, Bauer W, Hutterer C, Leidenberger M, Friedrich O, Marschall M, Kappes B, Görling A, Tsogoeva SB. Deeper Insight into the Six-Step Domino Reaction of Aldehydes with Malononitrile and Evaluation of Antiviral and Antimalarial Activities of the Obtained Bicyclic Products. ChemistryOpen 2017. [PMID: 28638769 PMCID: PMC5474667 DOI: 10.1002/open.201700005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The straightforward and efficient synthesis of complex aza‐ and carbobicyclic compounds, which are of importance for medicinal chemistry, is a challenge for modern chemical methodology. An unprecedented metal‐free six‐step domino reaction of aldehydes with malononitrile was presented in our previous study to provide, in a single operation, these bicyclic nitrogen‐containing molecules. Presented here is a deeper investigation of this atom‐economical domino process by extending the scope of aldehydes, performing post‐modifications of domino products, applying bifunctional organocatalysts and comprehensive NMR studies of selected domino products. The thermodynamic aspects of the overall reaction are also demonstrated using DFT methods in conjunction with a semi‐empirical treatment of van der Waals interactions. Furthermore, biological studies of seven highly functionalized and artemisinin‐containing domino products against human cytomegalovirus (HCMV) and Plasmodium falciparum 3D7 are presented. Remarkably, in vitro tests against HCMV revealed five domino products to be highly active compounds (EC50 0.071–1.8 μm), outperforming the clinical reference drug ganciclovir (EC50 2.6 μm). Against P. falciparum 3D7, three of the investigated artemisinin‐derived domino products (EC50 0.72–1.8 nm) were more potent than the clinical drug chloroquine (EC50 9.1 nm).
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Affiliation(s)
- Christina M Bock
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-University Erlangen-Nürnberg Henkestrasse 42 91054 Erlangen Germany
| | - Gangajji Parameshwarappa
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-University Erlangen-Nürnberg Henkestrasse 42 91054 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Walter Bauer
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-University Erlangen-Nürnberg Henkestrasse 42 91054 Erlangen Germany
| | - Corina Hutterer
- Institute for Clinical and Molecular Virology Friedrich-Alexander-Universität Erlangen-Nürnberg Schlossgarten 4 91054 Erlangen Germany
| | - Maria Leidenberger
- Institute of Medical Biotechnology Friedrich-Alexander-Universität Erlangen-Nürnberg Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Oliver Friedrich
- Institute of Medical Biotechnology Friedrich-Alexander-Universität Erlangen-Nürnberg Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Manfred Marschall
- Institute for Clinical and Molecular Virology Friedrich-Alexander-Universität Erlangen-Nürnberg Schlossgarten 4 91054 Erlangen Germany
| | - Barbara Kappes
- Institute of Medical Biotechnology Friedrich-Alexander-Universität Erlangen-Nürnberg Paul-Gordan-Straße 3 91052 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstraße 3 91058 Erlangen Germany
| | - Svetlana B Tsogoeva
- Institute of Organic Chemistry I and Interdisciplinary Center for Molecular Materials Friedrich-Alexander-University Erlangen-Nürnberg Henkestrasse 42 91054 Erlangen Germany
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Bock CM, Parameshwarappa G, Bönisch S, Neiss C, Bauer W, Hampel F, Görling A, Tsogoeva SB. Inside Back Cover: Generation of Complex Azabicycles and Carbobicycles from Two Simple Compounds in a Single Operation through a Metal-Free Six-Step Domino Reaction (Chem. Eur. J. 15/2016). Chemistry 2016. [DOI: 10.1002/chem.201600644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Christina M. Bock
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Gangajji Parameshwarappa
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Christian Neiss
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Walter Bauer
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Frank Hampel
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
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10
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Bock CM, Parameshwarappa G, Bönisch S, Neiss C, Bauer W, Hampel F, Görling A, Tsogoeva SB. Generation of Complex Azabicycles and Carbobicycles from Two Simple Compounds in a Single Operation through a Metal-Free Six-Step Domino Reaction. Chemistry 2016; 22:5189-97. [DOI: 10.1002/chem.201504798] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Indexed: 01/26/2023]
Affiliation(s)
- Christina M. Bock
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Gangajji Parameshwarappa
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Simon Bönisch
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Christian Neiss
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Walter Bauer
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Frank Hampel
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Andreas Görling
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Institute of Organic Chemistry and Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
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11
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Bönisch S, Sonnabend N, Holtz K, Müller A, Schützwohl M, Kocalevent RD. P01-175 - HELP-S for Children: analysing the needs of children with a mentally ill parent - a multi-centre study in Saxony, Germany. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)70381-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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12
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Dittrich T, Bönisch S, Zabel P, Dube S. High precision differential measurement of surface photovoltage transients on ultrathin CdS layers. Rev Sci Instrum 2008; 79:113903. [PMID: 19045899 DOI: 10.1063/1.3020757] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Time-resolved surface photovoltage (SPV) is an important method for studying charge separation, for example, in nanostructured semiconductors. High precision differential measurement of SPV transients was realized with two identical measurement capacitors and high-impedance buffers. In addition, logarithmic readout and averaging procedures were implemented for single transients over eight magnitudes in time. As a model system ultrathin CdS layers were investigated. The thickness dependencies of the SPV amplitudes and that of the dominating relaxation mechanisms are demonstrated and discussed.
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Affiliation(s)
- Th Dittrich
- Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin, Germany
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Orth SR, Nobiling R, Bönisch S, Ritz E. Inhibitory effect of calcium channel blockers on human mesangial cell growth: evidence for actions independent of L-type Ca2+ channels. Kidney Int 1996; 49:868-79. [PMID: 8648932 DOI: 10.1038/ki.1996.120] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Calcium channel blockers (CCB) are known to affect the outcome of glomerulosclerosis in vivo and to suppress mesangial cell proliferation and cytokine production in vitro. It is uncertain, however, whether (i) human adult mesangial cells (HMC) express L-type Ca2+ channels and (ii) whether the effect of CCB on HMC is mediated by inhibition of L-type Ca2+ channels. In single cell preparations of HMC, the L-type Ca2+ channel agonist Bay K 8644 and K+-depolarization of the cell membrane caused a transient increase of cytosolic free Ca2+ ([Ca2+]i) in 60 to 80% of the cells. The CCB verapamil and nifedipine partially inhibited the effect of Bay K 8644 and K+-depolarization on [Ca2+]i. Binding experiments confirmed these functional studies by showing specific binding at the phenylalkylamine binding site of L-Type Ca2+ channels. Quiescent HMC were stimulated with fetal calf serum (FCS) or growth factors (platelet derived growth factor A/B, epidermal growth factor, angiotensin II, endothelin 1) in the presence of various concentrations (10(-10) to 10(-5) M) of different CCB: either (R)-verapamil, (S)-verapamil or the raceme of verapamil, and nifedipine or diltiazem, respectively. In addition, the enantiomers of devapamil were studied, because their action on the L-type Ca2+ channel is more stereoselective than that of the enantiomers of verapamil. At high concentrations (10(-6) to 10(-5) M) (R,S)-verapamil decreased cell numbers in cultures of quiescent HMC, increased LDH in the supernatant, and caused loss of trypan blue exclusion (cytotoxicity). At lower concentrations (R,S)-verapamil showed no cytotoxicity, but had two effects: (1.) concentration dependent (down to 10(-8) M) inhibition of indices of cell proliferation, that is, (i) stimulated (FCS or growth factor) 3H-thymidine incorporation and (ii) increment in cell number; and (2.) inhibition of indices of cell or matrix protein synthesis, that is, (i) stimulated 3H-methionine incorporation and (ii) 3H-proline incorporation. At equimolar concentrations the dihydropyridine nifedipine was equipotent with verapamil, whereas the benzothiazepine diltiazem was conspicuously less effective. Even at the lowest effective concentration (10(-8) M) comparison of (R)- and (S)-verapamil showed no significant difference between the enantiomer with weak or with strong effect on L-type Ca2+ channels, and this was true even when the more stereoselective enantiomers of devapamil were tested. These observations argue against the notion that effects of CCB result from specific interaction with L-type Ca2+ channels. The data are more consistent with the idea that interactions with targets other than L-type Ca2+ channels are involved.
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Affiliation(s)
- S R Orth
- Department of Internal Medicine, Ruperto Carola University Heidelberg, Germany
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Orth SR, Weinreich T, Bönisch S, Weih M, Ritz E. Angiotensin II induces hypertrophy and hyperplasia in adult human mesangial cells. Exp Nephrol 1995; 3:23-33. [PMID: 7712140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Several experimental studies point to a potential role of angiotensin II (Ang II) in the progression of glomerulosclerosis even in the absence of glomerular hypertension. We tested the hypothesis that Ang II acts as a growth factor for adult human mesangial cells (AHMC). AHMC were isolated from noninvolved parts of tumor nephrectomy specimens and grown in RPMI medium with the addition of fetal calf serum (FCS). All studies were performed with growth-arrested cells. Proliferation studies were done in serum-free standard growth medium (SF) with the addition of either various concentrations of insulin, plasma-derived serum, or FCS. Ang II (10(-10) to 10(-6) M) dose dependently increased the 3H-thymidine uptake of AHMC up to 57 +/- 13% over solvent controls (p < 0.01). In parallel, the DNA content was 36 +/- 10% higher (p < 0.05) than in solvent controls after 2 days of culture. The cell numbers were higher up to 47 +/- 8% in Ang II (10(-6) M) stimulated cultures after 4 days of incubation (p < 0.01). The effect of Ang II was specific, since it was almost completely obliterated by the AT1 receptor antagonist DuP753. The effect of Ang II was particularly marked when cultures were incubated with SF plus high concentrations (1.7 x 10(-6) M) of insulin or SF plus 10% plasma-derived serum. In contrast, the effect was not significant when cultures were incubated with SF plus 10% FCS. Ang II, when added to platelet-derived growth factor at various concentrations, did not further increase the proliferation. The effect on protein synthesis was assessed in growth-arrested AHMC by 3H-methionine uptake and protein/DNA ratio in cell lysates. Ang II (10(-10) to 10(-6) M) dose dependently increased the 3H-methionine uptake of AHMC up to 47 +/- 10% over solvent controls (p < 0.01). In parallel Ang II (10(-8) to 10(-6) M) dose dependently increased the 3H-methionine uptake of the protein/DNA ratio by 24 +/- 6% after 48 h of incubation. DuP753 obliterated the stimulatory effect of Ang II. Ang II (10(-6) M) also increased the mRNA of the immediate-early growth-related gene Egr-1. We conclude that Ang II induces hypertrophy and proliferation in adult human mesangial cells. This result is of interest with respect to a potential role of Ang II in the pathogenesis of glomerulosclerosis in humans.
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Affiliation(s)
- S R Orth
- Department Internal Medicine, Ruperto Carola University, Heidelberg, Germany
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Bönisch S, Ittrich G, Hagen H, Zabel R. [Testosterone secretion in men from childless marriages]. Zentralbl Gynakol 1973; 95:1025-39. [PMID: 4767215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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