1
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Anklin C, Gil RR. Full configurational and conformational analysis of artemisinin by one-bond carbon-carbon residual dipolar couplings at natural abundance. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2024; 62:599-604. [PMID: 38558418 DOI: 10.1002/mrc.5443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 04/04/2024]
Abstract
Configurational and conformational analysis of the biologically relevant natural product artemisinin was conducted using carbon-carbon residual dipolar couplings (1DCC RDCs) at natural abundance. These RDCs were measured through the 2D-INADEQUATE NMR experiment using a sample aligned in a compressed poly (methyl methacrylate) (PMMA) gel swollen in CDCl3. Singular value decomposition (SVD) fitting analysis of all carbon-carbon bonds, 1DCC RDCs, in relation to the full configuration/conformational space (32 diastereoisomers) of artemisinin, unambiguously identified the correct configuration of artemisinin.
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Affiliation(s)
- Clemens Anklin
- Bruker BioSpin Corporation, Billerica, Massachusetts, USA
| | - Roberto R Gil
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
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2
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Herold D, Kind J, Frieß F, Thiele CM. Extraction of pure component spectra from ex situ illumination UV/Vis and NMR spectroscopy. Photochem Photobiol Sci 2023; 22:2599-2606. [PMID: 37751073 DOI: 10.1007/s43630-023-00475-5] [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: 06/16/2023] [Accepted: 08/28/2023] [Indexed: 09/27/2023]
Abstract
Obtaining understanding of a photochemical reaction relies on the observation, identification and quantification of the compounds involved. The photochemical properties of the individual components are of particular importance, and their determination, however, is not always trivial. This is also true for the quantitative measure on the ability to absorb light, the extinction coefficient εi if more than one species i is present and two or more species absorb light of the same wavelength. In this work, it is demonstrated how pure component spectra can be obtained with a simple combination of successive and repeated ex situ illumination, UV/Vis and NMR spectroscopy. From the complementary information accessible, the wavelength-dependent extinction coefficients of all species can be calculated yielding the pure component spectra. A comparison with published data shows excellent agreement and thus proves that this approach is highly reliable.
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Affiliation(s)
- Dominik Herold
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, 64287, Darmstadt, Germany
| | - Jonas Kind
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, 64287, Darmstadt, Germany
| | - Florian Frieß
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, 64287, Darmstadt, Germany
| | - Christina M Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, 64287, Darmstadt, Germany.
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3
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Yamada M, Sawazaki T, Fujita M, Asanoma F, Nishikawa Y, Kawai T. Tetrathienyl Corannulene Compounds with Highly Sensitive Photochromism. Chemistry 2022; 28:e202201286. [DOI: 10.1002/chem.202201286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Mihoko Yamada
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
| | - Tomoya Sawazaki
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
| | - Mae Fujita
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
| | - Fumio Asanoma
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
| | - Yoshiko Nishikawa
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
| | - Tsuyoshi Kawai
- Division of Materials Science Nara Institute of Science and Technology NAIST Ikoma Nara 630-0192 Japan
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4
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Roth FA, Schmidts V, Thiele CM. TITANIA: Model-Free Interpretation of Residual Dipolar Couplings in the Context of Organic Compounds. J Org Chem 2021; 86:15387-15402. [PMID: 34677977 DOI: 10.1021/acs.joc.1c01926] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Residual dipolar couplings (RDCs) become increasingly important as additional NMR parameters in the structure elucidation of organic compounds but are usually used in fitting procedures to discriminate between (computed) structures that are in accordance with RDCs and others that can be ruled out. Thus, the determination of configurations requires prior structural information. The direct use of RDCs as restraints to construct structures based on RDCs has only recently begun also in organic compounds. No protocol has been published though that uses the vector and dynamics information available in multialignment data sets directly for the joint determination of conformation and configuration of organic compounds. This is proposed in the current study. We show that by employing these data, even a flat or random start structure converges into the correctly configured structure when employing multiple alignment data sets in our iterative procedure. The requirements in terms of the number of RDCs and alignment media necessary are discussed in detail.
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Affiliation(s)
- Felix A Roth
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technical University of Darmstadt, Alarich-Weiss-Str. 16, 64287 Darmstadt, Germany
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technical University of Darmstadt, Alarich-Weiss-Str. 16, 64287 Darmstadt, Germany
| | - Christina M Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technical University of Darmstadt, Alarich-Weiss-Str. 16, 64287 Darmstadt, Germany
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5
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Pramanik S, Kauffmann B, Hecht S, Ferrand Y, Huc I. Light-mediated chiroptical switching of an achiral foldamer host in presence of a carbohydrate guest. Chem Commun (Camb) 2021; 57:93-96. [PMID: 33332504 DOI: 10.1039/d0cc06484j] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoresponsive diarylethene was incorporated in an achiral helical foldamer container. A carbohydrate guest was found to induce opposite handedness upon binding to the open and closed forms of the diarylethene-containing foldamer, thus enabling chiroptical switching of an achiral host mediated by a chiral guest.
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Affiliation(s)
- Susnata Pramanik
- Department Pharmazie and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstr. 5-13, 81377 München, Germany.
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6
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Dewis L, Crouch R, Russell D, Butts C. Improving the accuracy of 1 H- 19 F internuclear distance measurement using 2D 1 H- 19 F HOESY. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:1143-1149. [PMID: 31237710 DOI: 10.1002/mrc.4904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/11/2019] [Accepted: 06/14/2019] [Indexed: 06/09/2023]
Abstract
With the rise in fluorinated pharmaceuticals, it is becoming increasingly important to develop new 19 F NMR-based methods to assist in their analysis. Crucially, obtaining information regarding the conformational dynamics of a molecule in solution can aid the design of strongly binding therapeutics. Herein, we report the development of a 2D 1 H-19 F Heteronuclear Overhauser Spectroscopy (HOESY) experiment to measure 1 H-19 F internuclear distances, with accuracies of ~5% when compared with 1 H-19 F internuclear distances calculated by quantum chemical methods. We demonstrate that correcting for cross-relaxation of 1 H, using the diagonal peaks from the 2D 1 H-1 H Nuclear Overhauser Enhancement Spectroscopy (NOESY), is critical in obtaining accurate values for 1 H-19 F internuclear distances. Finally, we show that by using the proposed method to measure 1 H-19 F internuclear distances, we are able to determine the relative stereochemistry of two fluorinated pharmaceuticals.
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Affiliation(s)
- Lydia Dewis
- Genentech Inc, South San Francisco, CA, USA
- School of Chemistry, University of Bristol, Bristol, UK
| | | | | | - Craig Butts
- School of Chemistry, University of Bristol, Bristol, UK
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7
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Broi K, Fuhrmann A, Dallmann A, Berger F, Hecht S. Stereoinformation Relay: Coupling Diastereoselectivity of a Thermal Diels‐Alder Reaction with the Photochemical Ring‐Closure of Diarylethenes. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201800262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kevin Broi
- Department of Chemistry & IRIS AdlershofHumboldt-University of Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Anne Fuhrmann
- Department of Chemistry & IRIS AdlershofHumboldt-University of Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - André Dallmann
- Department of Chemistry & IRIS AdlershofHumboldt-University of Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Fabian Berger
- Department of Chemistry & IRIS AdlershofHumboldt-University of Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Stefan Hecht
- Department of Chemistry & IRIS AdlershofHumboldt-University of Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
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8
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Spatial structure, thermodynamics and kinetics of formation of hydrazones derived from pyridoxal 5′-phosphate and 2-furoic, thiophene-2-carboxylic hydrazides in solution. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.125] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Lvov AG, Yokoyama Y, Shirinian VZ. Post-Modification of the Ethene Bridge in the Rational Design of Photochromic Diarylethenes. CHEM REC 2019; 20:51-63. [PMID: 31063675 DOI: 10.1002/tcr.201900015] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/19/2019] [Accepted: 04/24/2019] [Indexed: 12/17/2022]
Abstract
Fine-tuning of the molecular structure of organic bistable compounds to improve their photochromic performance or to introduce additional functions remains an important issue in the development of photoresponsive materials. Diarylethenes bearing heterocyclic moieties belong to the most intensively studied class of organic photochromes due to their excellent photochemical properties. A huge number of diarylethenes have been synthesized so far. Analysis of the literature data shows that there are very worthy examples of diarylethenes developed by the Irie and Feringa groups, which can be the common starting material for a number of diarylethenes functionalized in hetaryl moieties. We refer to these structures as photochromic diarylethene precursors. These diarylethenes have proved to be very useful in the construction of functional molecules with desired properties. On the other hand, in our groups, we have elaborated on diarylethene precursors with modifiable ethene bridges. In this review, we have collected examples of such structures and their chemical modifications, leading to the improvement or fine-tuning of photochromic switching.
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Affiliation(s)
- Andrey G Lvov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky prosp., 119991, Moscow, Russian Federation
| | - Yasushi Yokoyama
- Department of Chemistry and Life Science Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan
| | - Valerii Z Shirinian
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky prosp., 119991, Moscow, Russian Federation
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10
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Jurissek C, Berger F, Eisenreich F, Kathan M, Hecht S. External Reversal of Chirality Transfer in Photoswitches. Angew Chem Int Ed Engl 2019; 58:1945-1949. [DOI: 10.1002/anie.201812284] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Christoph Jurissek
- Department of Chemistry & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Fabian Berger
- Department of Chemistry & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Fabian Eisenreich
- Department of Chemistry & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Michael Kathan
- Department of Chemistry & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Stefan Hecht
- Department of Chemistry & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Germany
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11
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Jurissek C, Berger F, Eisenreich F, Kathan M, Hecht S. Externe Umkehr eines Chiralitätstransfers im Photoschalter. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Christoph Jurissek
- Institut für Chemie & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Fabian Berger
- Institut für Chemie & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Fabian Eisenreich
- Institut für Chemie & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Michael Kathan
- Institut für Chemie & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
| | - Stefan Hecht
- Institut für Chemie & IRIS Adlershof; Humboldt-Universität zu Berlin; Brook-Taylor-Straße 2 12489 Berlin Deutschland
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12
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Lvov AG, Khusniyarov MM, Shirinian VZ. Azole-based diarylethenes as the next step towards advanced photochromic materials. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2018.04.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Chirality and stereoselectivity in photochromic reactions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2017.12.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Reller M, Wesp S, Koos MRM, Reggelin M, Luy B. Biphasic Liquid Crystal and the Simultaneous Measurement of Isotropic and Anisotropic Parameters by Spatially Resolved NMR Spectroscopy. Chemistry 2017. [DOI: 10.1002/chem.201702126] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Malin Reller
- Institut für Organische Chemie and Institut für Biologische Grenzflächen 4 - Magnetische Resonanz; Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Svenja Wesp
- Organische Chemie; Technische Universität Darmstadt; Alarich-Weiss Str. 4 64287 Darmstadt Germany
| | - Martin R. M. Koos
- Institut für Organische Chemie and Institut für Biologische Grenzflächen 4 - Magnetische Resonanz; Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Michael Reggelin
- Organische Chemie; Technische Universität Darmstadt; Alarich-Weiss Str. 4 64287 Darmstadt Germany
| | - Burkhard Luy
- Institut für Organische Chemie and Institut für Biologische Grenzflächen 4 - Magnetische Resonanz; Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
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15
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Fredersdorf M, Kurz M, Bauer A, Ebert MO, Rigling C, Lannes L, Thiele CM. Conformational Analysis of an Antibacterial Cyclodepsipeptide Active against Mycobacterium tuberculosis
by a Combined ROE and RDC Analysis. Chemistry 2017; 23:5729-5735. [DOI: 10.1002/chem.201605143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Maic Fredersdorf
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
- Technische Universität Darmstadt; Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Michael Kurz
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Armin Bauer
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Marc-Olivier Ebert
- ETH Zürich; Laboratorium für Organische Chemie, D-CHAB; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Carla Rigling
- ETH Zürich; Laboratorium für Organische Chemie, D-CHAB; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Laurie Lannes
- Present address: Center for Biomolecular Magnetic Resonance; BMRZ); Institute of Organic Chemistry and Chemical Biology; Johann Wolfgang Goethe Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt Germany
| | - Christina Marie Thiele
- Technische Universität Darmstadt; Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Alarich-Weiss-Straße 4 64287 Darmstadt Germany
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16
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Lvov AG, Kavun AM, Kachala VV, Nelyubina YV, Metelitsa AV, Shirinian VZ. Structural and Spectral Properties of Photochromic Diarylethenes: Size Effect of the Ethene Bridge. J Org Chem 2017; 82:1477-1486. [DOI: 10.1021/acs.joc.6b02665] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Andrey G. Lvov
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Alexey M. Kavun
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospekt, 119991 Moscow, Russian Federation
- Higher
Chemical College of the Russian Academy of Sciences, D. I. Mendeleev University of Chemical Technology of Russia, 9, Miusskaya Square, 125047 Moscow, Russian Federation
| | - Vadim V. Kachala
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Yulia V. Nelyubina
- A. N.
Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova Street 28, Moscow, Russian Federation
| | - Anatoly V. Metelitsa
- Institute
of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka Avenue, Rostov on Don 344090, Russian Federation
| | - Valerii Z. Shirinian
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospekt, 119991 Moscow, Russian Federation
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17
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Schmidts V. Perspectives in the application of residual dipolar couplings in the structure elucidation of weakly aligned small molecules. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:54-60. [PMID: 27743456 DOI: 10.1002/mrc.4543] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/10/2016] [Accepted: 10/13/2016] [Indexed: 05/28/2023]
Abstract
This perspective article aims to review the general methodology in the application of residual dipolar couplings (RDCs) in the structure elucidation of small molecules and give the author's view on challenges for future applications. Recent improvements in the availability of alignment media, new pulse sequences for the measurement of couplings and improvements in the analysis software have garnered widespread interest in the technique. However, further generalization is needed in order to make RDC analysis into a truly "routine" method. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Darmstadt, Germany
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18
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Procházková E, Kolmer A, Ilgen J, Schwab M, Kaltschnee L, Fredersdorf M, Schmidts V, Wende RC, Schreiner PR, Thiele CM. Uncovering Key Structural Features of an Enantioselective Peptide-Catalyzed Acylation Utilizing Advanced NMR Techniques. Angew Chem Int Ed Engl 2016; 55:15754-15759. [DOI: 10.1002/anie.201608559] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Eliška Procházková
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
- On leave from Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; Flemingovo nám. 2 166 10 Prague Czech Republic
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Julian Ilgen
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Mira Schwab
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Lukas Kaltschnee
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Maic Fredersdorf
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Raffael C. Wende
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
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19
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Procházková E, Kolmer A, Ilgen J, Schwab M, Kaltschnee L, Fredersdorf M, Schmidts V, Wende RC, Schreiner PR, Thiele CM. Aufklärung entscheidender struktureller Aspekte einer enantioselektiven Peptid-katalysierten Acylierung mittels moderner NMR-Techniken. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608559] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Eliška Procházková
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
- Beurlaubt vom Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; Flemingovo nám. 2 166 10 Prague Tschechische Republik
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Julian Ilgen
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Mira Schwab
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Lukas Kaltschnee
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Maic Fredersdorf
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Raffael C. Wende
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Peter R. Schreiner
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
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Duan Y, Waerenborgh JC, Clemente-Juan JM, Giménez-Saiz C, Coronado E. Light-induced decarboxylation in a photo-responsive iron-containing complex based on polyoxometalate and oxalato ligands. Chem Sci 2016; 8:305-315. [PMID: 30294411 PMCID: PMC6166234 DOI: 10.1039/c6sc01919f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 08/15/2016] [Indexed: 12/14/2022] Open
Abstract
A new iron-oxalato polyoxometalate exhibits a remarkable photocoloration effect in the solid state based entirely on an intramolecular process.
A new photoresponsive molecular polyanion in which two Fe(iii) ions are simultaneously coordinated by two [A-α-PW9O34]9– polyoxometalate units and two oxalato ligands has been obtained. When irradiated with UV light its potassium salt, 1, exhibits a remarkable photocoloration effect, attributable to the partial reduction of the POM units to give rise to a mixed-valence species. The photoinduced process is intramolecular and involves electron transfer from the oxalato ligands, which partially decompose releasing CO2, towards the Fe(iii) and the POM. This mechanism has been confirmed by DRS, IR, XPS and Mössbauer spectroscopy, magnetism and elemental analysis. An analogous derivative of 1 containing malonato ligands does not exhibit such photoactive behaviour, which is evidence that the oxalate ligand is essential for the photoactivity of 1. To our knowledge, 1 represents the first POM-based compound in which the photocoloration effect does not require the presence of intermolecular short interactions.
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Affiliation(s)
- Yan Duan
- Instituto de Ciencia Molecular (ICMol) , Universitat de València , c/Catedrático José Beltrán, 2 , 46980 Paterna , Spain . ;
| | - João C Waerenborgh
- Centro de Ciências e Tecnologias Nucleares , Instituto Superior Técnico , Universidade de Lisboa , 2695-066 Bobadela LRS , Portugal
| | - Juan M Clemente-Juan
- Instituto de Ciencia Molecular (ICMol) , Universitat de València , c/Catedrático José Beltrán, 2 , 46980 Paterna , Spain . ;
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular (ICMol) , Universitat de València , c/Catedrático José Beltrán, 2 , 46980 Paterna , Spain . ;
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) , Universitat de València , c/Catedrático José Beltrán, 2 , 46980 Paterna , Spain . ;
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Thiele CM, Kolmer A. Response to "Comment on "Conformational analysis of small organic molecules using NOE and RDC data: A discussion of strychnine and α-methylene-γ-butyrolactone" by I.A. Khodov, M.G. Kiselev, V.V. Klochkov, S.V. Efimov [http://dx.doi.org/10.1016/j.jmr.2016.02.009]" - Or Life is about compromises. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2016; 266:69-72. [PMID: 26947752 DOI: 10.1016/j.jmr.2016.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 06/05/2023]
Affiliation(s)
- Christina M Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 16, 64287 Darmstadt, Germany
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 16, 64287 Darmstadt, Germany
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