1
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Anilkumar A, Dutta Choudhury S. Self-assembly of Reverse Poloxamine Induced by Saccharide Excipients: Insights from Fluorescence. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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2
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Hurley JJM, Zhu L. Excitation Energy-Dependent, Excited-State Intramolecular Proton Transfer-Based Dual Emission in Poor Hydrogen-Bonding Solvents. J Phys Chem A 2022; 126:5711-5720. [PMID: 35980823 DOI: 10.1021/acs.jpca.2c03668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-(2'-Hydroxyphenyl)benzoxazole (HBO) substituted at the 5'-position with bipyridylvinylene phenylenevinylene (compound 2) produces both normal and, via an excited-state intramolecular proton transfer (ESIPT) reaction, tautomer emissions in solvents that preserve intramolecular hydrogen bonds. The abundance of the tautomer emission from compound 2 in a poor hydrogen-bonding solvent increases in response to the application of a higher excitation energy. Based on quantum chemical calculations, the excitation-dependent dual emission is consistent with a model in which the ESIPT reaction is more favored in the S2 than in the S1 electronically excited state.
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Affiliation(s)
- Joseph J M Hurley
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Lei Zhu
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
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3
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Meisner QJ, Hurley JJM, Guo P, Blood AR, Schaller RD, Gosztola DJ, Wiederrecht GP, Zhu L. Triple Emission of 5'-( para-R-Phenylene)vinylene-2-(2'-hydroxyphenyl)benzoxazole (PVHBO). Part I: Dual Emission from the Neutral Species. J Phys Chem A 2022; 126:1033-1061. [PMID: 35143188 DOI: 10.1021/acs.jpca.1c10165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The effects of 5'-(para-R-phenylene)vinylene (PV) substituents on the emission properties of 2-(2'-hydroxyphenyl)benzoxazole (HBO) are analyzed using steady-state and time-resolved absorption and emission spectroscopies in addition to quantum chemical calculations. All members in the series of PVHBOs are capable of excited-state intramolecular proton transfer (ESIPT) with a solvent sensitivity that is typical of a HBO derivative to produce a normal (aka enol) emission and an excited-state tautomer (aka keto) emission. These two emission bands of the neutral dyes are discussed in the current paper. The intermolecular proton transfer, i.e., the deprotonation, of a PVHBO results in the third band of the triple emission, which is described in the succeeding paper. The placement of an electron-withdrawing substituent R on the PVHBO scaffold increases the intensity of the keto emission relative to the enol emission in hydrogen-bonding solvents. The R substituents do not significantly alter the wavelengths of the enol and keto emission bands, which are located in the blue and green regions, respectively, of the visible spectrum. The ultrafast time-resolved spectroscopies and quantum chemical calculations offer explanations on how the R group and the solvent affect the enol and keto emission properties (i.e., wavelength, lifetime, fluorescence quantum yield, and relative ratio of their emissions). The key findings include the following: (1) the emission energies of both enol and keto forms are not sensitively dependent on the R substituent and (2) the solvent-engaged enol excited state is quenched more efficiently as the R substituent becomes more electron-withdrawing. A PVHBO acts as a fusion of HBO and stilbenoid that intersect at the hydroxyphenyl moiety. Depending on the solvent and other environmental conditions, PVHBOs may exhibit the ESIPT property of HBO or the substituent-dependent emission of stilbenoid. This paper and the succeeding article provide a photophysical model of PVHBOs to explain the wavelengths and relative abundances of the three emission bands (enol, keto, and anion) that these compounds are able to produce. Judicial selection of the environmental factors may drive the emission of a PVHBO into the spectral regions of blue, green, and, in a couple of cases, orange or red.
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Affiliation(s)
- Quinton J Meisner
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Joseph J M Hurley
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Peijun Guo
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Anna R Blood
- New College of Florida, 5800 Bay Shore Road, Sarasota, Florida 34243, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David J Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Gary P Wiederrecht
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Lei Zhu
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
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4
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Gleason PR, Kolbaba-Kartchner B, Henderson JN, Stahl EP, Simmons CR, Mills JH. Structural Origins of Altered Spectroscopic Properties upon Ligand Binding in Proteins Containing a Fluorescent Noncanonical Amino Acid. Biochemistry 2021; 60:2577-2585. [PMID: 34415744 DOI: 10.1021/acs.biochem.1c00291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fluorescent noncanonical amino acids (fNCAAs) could serve as starting points for the rational design of protein-based fluorescent sensors of biological activity. However, efforts toward this goal are likely hampered by a lack of atomic-level characterization of fNCAAs within proteins. Here, we describe the spectroscopic and structural characterization of five streptavidin mutants that contain the fNCAA l-(7-hydroxycoumarin-4-yl)ethylglycine (7-HCAA) at sites proximal to the binding site of its substrate, biotin. Many of the mutants exhibited altered fluorescence spectra in response to biotin binding, which included both increases and decreases in fluorescence intensity as well as red- or blue-shifted emission maxima. Structural data were also obtained for three of the five mutants. The crystal structures shed light on interactions between 7-HCAA and functional groups, contributed either by the protein or by the substrate, that may be responsible for the observed changes in the 7-HCAA spectra. These data could be used in future studies aimed at the rational design of fluorescent, protein-based sensors of small molecule binding or dissociation.
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5
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Li Y, Siddique F, Aquino AJA, Lischka H. Molecular Dynamics Simulation of the Excited-State Proton Transfer Mechanism in 3-Hydroxyflavone Using Explicit Hydration Models. J Phys Chem A 2021; 125:5765-5778. [PMID: 34165983 DOI: 10.1021/acs.jpca.1c03687] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
3-Hydroxyflavon (3-HF) represents an interesting paradigmatic compound to study excited-state intramolecular proton transfer (ESIPT) and intermolecular (ESInterPT) processes to explain the experimentally observed dual fluorescence in solvents containing protic contamination (water) as opposed to single fluorescence in highly purified nonpolar solvents. In this work, adiabatic on-the-fly molecular dynamics simulations have been performed for isolated 3-HF in an aqueous solution using a polarizable continuum model and including explicit water molecules to represent adequately hydrogen bonding. For the calculation of the excited state, time-dependent density functional theory and the Becke-3-Lee-Yang-Parr (B3LYP) functional have been used. For the isolated 3-HF, ultrafast ESIPT from the enol group to the neighboring keto group has been observed. The calculated PT time of 48 fs agrees well with the experimental value of 39 fs. Addition of one water molecule quenches this ESIPT process but shows an intermolecular concerted or stepwise tautomerization process via the bridging water molecule. Adding a second or more water molecules inhibits this ESInterPT process to a large degree. Most of the trajectories do not show any PT, preserving the initial excited-state enol structure, which is the origin of the violet-blue fluorescence appearing in the solvents contaminated with protic components.
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Affiliation(s)
- Yingchao Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Farhan Siddique
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Adélia J A Aquino
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China.,Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Hans Lischka
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
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6
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Exploring the transfer of hydrogen atom from kaempferol-based compounds to hydroxyl radical at ground state using PCM-DFT approach. Struct Chem 2019. [DOI: 10.1007/s11224-019-01331-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Binding, and thermodynamics of β-cyclodextrin inclusion complexes with some coumarin laser dyes and coumarin-based enzyme substrates: a simulation study. J INCL PHENOM MACRO 2018. [DOI: 10.1007/s10847-018-0850-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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8
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Effect of natural and modified cyclodextrins on the excited state proton transfer of 7-hydroxy-4-methylcoumarin. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Beniwal V, Kumar A, Pal H, Dutta Choudhury S. Excited-state prototropism of 7-hydroxy-4-methylcoumarin in [Cnmim][BF4] series of ionic liquid–water mixtures: insights on reverse micelle-like water nanocluster formation. Photochem Photobiol Sci 2018; 17:1256-1266. [DOI: 10.1039/c8pp00132d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study explores the excited-state prototropic behavior of 7-hydroxy-4-methylcoumarin dye in ionic liquid–water media, to reveal the intriguing reverse micelle formation in these solvent systems.
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Affiliation(s)
- Vijay Beniwal
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411 008
- India
| | - Anil Kumar
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411 008
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
- Home Bhabha National Institute
| | - Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
- Home Bhabha National Institute
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10
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Simkovitch R, Pinto da Silva L, Esteves da Silva JCG, Huppert D. Comparison of the Photoprotolytic Processes of Three 7-Hydroxycoumarins. J Phys Chem B 2016; 120:10297-10310. [DOI: 10.1021/acs.jpcb.6b01383] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ron Simkovitch
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | | | | | - Dan Huppert
- Raymond
and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
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11
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New AB2 type two-photon absorption dyes for well-separated dual-emission: molecular preorganization based approach to photophysical properties. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Lim B, Lee J. A Peptoid-Based Fluorescent Sensor for Cyanide Detection. Molecules 2016; 21:339. [PMID: 26978334 PMCID: PMC6273317 DOI: 10.3390/molecules21030339] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/04/2016] [Accepted: 03/07/2016] [Indexed: 01/06/2023] Open
Abstract
Peptoids, N-substituted glycine oligomers, are versatile peptidomimetics with diverse biomedical applications. However, strategies to the development of novel fluorescent peptoids as chemical sensors have not been extensively explored, yet. Here, we synthesized a novel peptoid-based fluorescent probe in which a coumarin moiety was incorporated via copper(I)-catalyzed azide-alkyne cycloaddition reaction. Fluorescence of the newly generated coumarin-peptoid was dramatically quenched upon coordination of the Cu(2+) ion, and the resulting peptoid-Cu(2+) complex exhibited significant Turn-ON fluorescence following the addition of CN(-). The rapid and reversible response, combined with cyanide selectivity of the synthesized peptoid, reflects a multistep photo-process and supports its utility as a new type of CN(-) sensor.
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Affiliation(s)
- Bumhee Lim
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.
| | - Jeeyeon Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.
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13
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Omidyan R, Omidyan M, Mohammadzadeh A. Electronically excited state of neutral/protonated, indole/5-hydroxyinodole–water clusters: a theoretical study. RSC Adv 2016. [DOI: 10.1039/c6ra06716f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Simulated IR-spectra of neutral, protonated indole–water clusters calculated at the RI-MP2, RI-CC2/aug-cc-pVDZ level of theory at the ground and S1 excited states.
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Affiliation(s)
- Reza Omidyan
- Department of Chemistry
- University of Isfahan
- Isfahan
- Iran
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14
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Simkovitch R, Huppert D. Photoprotolytic Processes of Umbelliferone and Proposed Function in Resistance to Fungal Infection. J Phys Chem B 2015; 119:14683-96. [PMID: 26488429 DOI: 10.1021/acs.jpcb.5b08439] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photoprotolytic processes of 7-hydroxy-coumarin (Umb) were investigated by steady-state and time-resolved-fluorescence techniques. We found that the Umb compound is a photoacid with pK(a)* ≈ 0.4 and a rate constant of the excited-state proton transfer (ESPT) to water of 2 × 10(10) s(-1). Umb is also a photobase and accepts an excess proton in solution and also directly from weak acids like acetic acid. When Umb is adsorbed on cellulose it also functions as a photoacid and a photobase. Hydroxycoumarins are known to accumulate next to fungal-, bacterial-, and viral-infected regions in the leaves and stems of plants in general and also in trees. We propose that these compounds when irradiated by sunlight UV, combat the fungi or bacteria by excited-state proton-transfer reactions. These photoprotolytic reactions provide a universal resistance mechanism to infections in plants.
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Affiliation(s)
- Ron Simkovitch
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
| | - Dan Huppert
- Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University , Tel Aviv 69978, Israel
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15
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Isaev AN. Keto-enol tautomerization of a peptide group with proton transfer through a water bridge. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2015. [DOI: 10.1134/s0036024415080154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Wang Y, Li H, Shi Y. Evidence for hydrogen-bonded ammonia wire influencing the ESMPT process of the 7-hydroxy-4-methylcoumarin·(NH3)3 cluster. NEW J CHEM 2015. [DOI: 10.1039/c5nj01079a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The different types of excited-state hydrogen-bonded dynamics mechanisms orderly provide two driving forces for the excited-state multiple proton transfer (ESMPT) reaction of the 7H4MC·(NH3)3 cluster.
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Affiliation(s)
- Ye Wang
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Hui Li
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Ying Shi
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
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17
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Omidyan R, Ataelahi M, Azimi G. Excited-state deactivation mechanisms of protonated and neutral phenylalanine: a theoretical study. RSC Adv 2015. [DOI: 10.1039/c5ra00630a] [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] Open
Abstract
Minimum energy paths (MEPs) of protonated phenylalanine (PheH+) at the electronic ground and S1 (1ππ*) excited states along the Cα–Cβ bond stretching coordinate, following proton transfer to the aromatic chromophore.
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Affiliation(s)
- Reza Omidyan
- Department of Chemistry
- University of Isfahan
- 81746-73441 Isfahan
- Iran
| | - Mitra Ataelahi
- Department of Chemistry
- University of Isfahan
- 81746-73441 Isfahan
- Iran
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18
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Stamm A, Schwing K, Gerhards M. Investigation of the hydrated 7-hydroxy-4-methylcoumarin dimer by combined IR/UV spectroscopy. J Chem Phys 2014; 141:194304. [DOI: 10.1063/1.4900893] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A. Stamm
- TU Kaiserslautern, Fachbereich Chemie and Research Center Optimas, Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
| | - K. Schwing
- TU Kaiserslautern, Fachbereich Chemie and Research Center Optimas, Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
| | - M. Gerhards
- TU Kaiserslautern, Fachbereich Chemie and Research Center Optimas, Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
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19
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Tattini M, Di Ferdinando M, Brunetti C, Goti A, Pollastri S, Bellasio C, Giordano C, Fini A, Agati G. Esculetin and esculin (esculetin 6-O-glucoside) occur as inclusions and are differentially distributed in the vacuole of palisade cells in Fraxinus ornus leaves: A fluorescence microscopy analysis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 140:28-35. [DOI: 10.1016/j.jphotobiol.2014.06.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 06/19/2014] [Accepted: 06/20/2014] [Indexed: 11/26/2022]
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20
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Omidyan R, Rezaei H. Excited state deactivation pathways of neutral/protonated anisole and p-fluoroanisole: a theoretical study. Phys Chem Chem Phys 2014; 16:11679-89. [PMID: 24810549 DOI: 10.1039/c4cp00679h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The potential energy profiles of neutral and protonated anisole and p-fluoroanisole at different electronic states have been investigated extensively by the RI-MP2 and RI-CC2 methods. The calculations reveal that the relaxation dynamics in protonated anisole and p-fluoroanisole are essentially different from those of the neutral analogues. In neutral anisole/p-fluoroanisole, the (1)πσ* state plays a vital relaxation role along the O-CH3 coordinate, yielding the CH3 radical. For both of these molecules, the calculations indicate conical intersections (CIs) between the ground and excited state potential energy (PE) curves, hindered by a small barrier, and providing non-adiabatic gates for radiation-less deactivation to the ground state. Nevertheless, for the protonated cases, besides the prefulvenic deformation of the benzene ring, it has been predicted that the lowest (1)(σ,n)π* state along the C-O-C bond angle plays an important role in photochemistry and the relaxation dynamics. The S1, S0 PE profiles of protonated anisole along with the former reaction coordinate (out-of-plane deformation) show a barrierless relaxation pathway, which can be responsible for the ultrafast deactivation of excited systems to the ground state via the low-lying S1/S0 conical intersection. Moreover, the later reaction coordinate in protonated species (C-O-C angle from 120°-180°) is consequently accompanied with the bond cleavage of C-OCH3 at the (1)(σ,n)π* state, hindered by a barrier of ∼0.51 eV, and can be responsible for the relaxation of excited systems with significant excess energy (hν≥ 5 eV). Furthermore, according to the RI-CC2 calculated results, different effects on the S1-S0 electronic transition energy of anisole and p-fluoroanisole upon protonation have been predicted. The first electronic transitions of anisole and p-fluoroanisole shift by ∼0.3 and 1.3 eV to the red respectively due to protonation.
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Affiliation(s)
- Reza Omidyan
- Department of Chemistry, University of Isfahan, 81746-73441 Isfahan, Iran.
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21
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Yasarawan N, Thipyapong K, Ruangpornvisuti V. Exploring molecular structures, orbital interactions, intramolecular proton-transfer reaction kinetics, electronic transitions and complexation of 3-hydroxycoumarin species using DFT methods. J Mol Graph Model 2014; 51:13-26. [PMID: 24858252 DOI: 10.1016/j.jmgm.2014.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/22/2014] [Accepted: 04/22/2014] [Indexed: 12/30/2022]
Abstract
Optimal structures and electronic properties of various species of 3-hydroxycoumarin (3-HCou) have been explored using density functional theory (DFT) methods under polarizable continuum model (PCM) of solvation. Electron transfer from pyrone to benzene moieties is enhanced upon deprotonation. Anionic and radical species have similar orbital-interaction characteristics but the charges in the former are distributed more uniformly. The rate of intramolecular proton transfer for the neutral species increases many folds upon excitation. The HOMO-LUMO transition with π→π* character mainly accounts for the UV absorption of most 3-HCou species in solution. The wavelengths of maximal absorption predicted using TD-DFT method are in agreement with the previous experiment. For the charged species, calculations with the range-corrected functional yield better agreement with the previous experiment. Anionic 3-HCou species shows high degrees of complexation with chromium(III) and copper(II) compared with oxovanadium(IV) and zinc(II). Either oxovanadium(IV) or zinc(II) prefers forming two isomeric complexes with comparable degrees of formation.
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Affiliation(s)
- Nuttawisit Yasarawan
- Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
| | - Khajadpai Thipyapong
- Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand.
| | - Vithaya Ruangpornvisuti
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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22
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Poorabdollah H, Omidyan R, Solimannejad M, Azimi G. Hydrogen bond strengthening of cis-trans glyoxal dimers in electronic excited states: a theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:337-342. [PMID: 24317260 DOI: 10.1016/j.saa.2013.11.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 10/02/2013] [Accepted: 11/02/2013] [Indexed: 06/02/2023]
Abstract
The second-order approximate coupled-cluster (CC2) method was performed to investigate the excited state hydrogen-bonding properties of Glyoxal (C2H2O2, Gl) dimers. Since the strengthening and weakening of hydrogen bonds can be investigated by monitoring the vibrational absorption spectra of some hydrogen-bonded groups in different electronic states, the infrared spectra of the hydrogen-bonded Gl-Gl complexes in both of the ground state and the S1 electronically excited state are calculated using the MP2/CC2 methods respectively. We demonstrated that the intermolecular hydrogen bond C=O⋯H-C between two glyoxal molecules is significantly strengthened in the electronically excited S1 state upon photoexcitation of the hydrogen-bonded Gl-Gl complexes.
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Affiliation(s)
| | - Reza Omidyan
- Department of Chemistry, University of Isfahan, 81746-7344 Isfahan, Iran.
| | - Mohammad Solimannejad
- Quantum Chemistry Group, Department of Chemistry, Faculty of Sciences, Arak University, Arak 38156-8-8349, Iran
| | - Gholamhasan Azimi
- Department of Chemistry, University of Isfahan, 81746-7344 Isfahan, Iran
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23
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Saed B, Omidyan R. Protonation effect on the electronic properties of 2-pyridone monomer, dimer and its water clusters: a theoretical study. J Chem Phys 2014; 140:024315. [PMID: 24437885 DOI: 10.1063/1.4859255] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The CC2 (second order approximate coupled cluster method) has been applied to investigate protonation effect on electronic transition energies of 2-pyridone (2PY), 2-pyridone dimer, and micro-solvated 2-pyridone (0-2 water molecules). The PE profiles of protonated 2-pyridone (2PYH(+)) as well as monohydrated 2PYH(+) at the different electronic states have been investigated. The (1)πσ∗ state in protonated species (2PYH(+)) is a barrier free and dissociative state along the O-H stretching coordinate. In this reaction coordinate, the lowest lying (1)πσ∗ predissociates the bound S1((1)ππ∗) state, connecting the latter to a conical intersection with the S0 state. These conical intersections lead the (1)ππ∗ state to proceed as predissociative state and finally direct the excited system to the ground state. Furthermore, in presence of water molecule, the (1)πσ∗ state still remains dissociative but the conical intersection between (1)πσ∗ and ground state disappears. In addition, according to the CC2 calculation results, it has been predicted that protonation significantly blue shifts the S1-S0 electronic transition of monomer, dimer, and microhydrated 2-pyridone.
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Affiliation(s)
- Behnaz Saed
- Department of Chemistry, University of Isfahan, 81746-73441 Isfahan, Iran
| | - Reza Omidyan
- Department of Chemistry, University of Isfahan, 81746-73441 Isfahan, Iran
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Cheng J, Liu D, Wang M. The excited-state proton transfer mechanism in water-bridged 4-hydroxybenzoate: spectroscopy and DFT/TDDFT studies. RSC Adv 2014. [DOI: 10.1039/c4ra02746a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Ataelahi M, Omidyan R. Microhydration effects on the electronic properties of protonated phenol: a theoretical study. J Phys Chem A 2013; 117:12842-50. [PMID: 24191660 DOI: 10.1021/jp409537s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The CC2 (second-order approximate coupled cluster method) has been employed to investigate microhydration effect on electronic properties of protonated phenol (PhH(+)) According to the CC2 calculation results on electronic excited states of microhydrated PhH(+), for the S1 and S2 electronic states, which are of (1)ππ* nature and belong to the A' representation of molecular Cs point group, a significant blue shift effect on the S1 and S2 electronic states, which are of 1ππ* nature and belong to the A' representation of molecular Cs point group, in comparison to corresponding transitions on bare cation (PhH(+)), has been predicted. Nevertheless, for the S3-S0 (1A'', 1σπ*) transition, a large red shift effect has been predicted. Furthermore, it has been found that the lowest (1)σπ* state plays a prominent role in the photochemistry of these systems. In the bare protonated phenol, the (1)σπ* state is a bound state with a broad potential curve along the OH stretching coordinate, while it is dissociative in microhydrated species. This indicates to a predissociation of the S1((1)ππ*) state by a low-lying (1)σπ* state, which leads the excited system to a concerted proton-transfer reaction from protonated chromophore to the solvent. The dissociative (1)σπ* state in monohydrated PhH(+) has small barrier, while increasing the solvent molecules up to three removes the barrier and consequently expedites the proton-transfer reaction dynamics.
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Affiliation(s)
- Mitra Ataelahi
- Department of Chemistry, University of Isfahan , 81746-73441 Isfahan, Iran
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De Silva N, Minezawa N, Gordon MS. Excited-State Hydrogen Atom Transfer Reaction in Solvated 7-Hydroxy-4-methylcoumarin. J Phys Chem B 2013; 117:15386-94. [DOI: 10.1021/jp404686c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Nuwan De Silva
- Department of Chemistry, Iowa State University, Ames, Iowa 50011,
United States
| | - Noriyuki Minezawa
- Department of Chemistry, Iowa State University, Ames, Iowa 50011,
United States
| | - Mark S. Gordon
- Department of Chemistry, Iowa State University, Ames, Iowa 50011,
United States
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Krauter CM, Möhring J, Buckup T, Pernpointner M, Motzkus M. Ultrafast branching in the excited state of coumarin and umbelliferone. Phys Chem Chem Phys 2013; 15:17846-61. [DOI: 10.1039/c3cp52719k] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Carbonaro CM, Ricci PC, Casula MF, Tocco G, Cubeddu M. Optical Characterization of PEG-Supported 7-Hydroxy-4-methyl-coumarin in Distilled Water Solution. J Phys Chem A 2012; 116:11531-5. [DOI: 10.1021/jp3080628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Graziella Tocco
- Department of Life Sciences and
Environment, University of Cagliari, Palazzo
delle Scienze, Via Ospedale, 72, 09124 Cagliari, Italy
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29
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Kungwan N, Plasser F, Aquino AJA, Barbatti M, Wolschann P, Lischka H. The effect of hydrogen bonding on the excited-state proton transfer in 2-(2′-hydroxyphenyl)benzothiazole: a TDDFT molecular dynamics study. Phys Chem Chem Phys 2012; 14:9016-25. [DOI: 10.1039/c2cp23905a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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31
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Zhao W, Ding Y, Xia Q. Time-dependent density functional theory study on the absorption spectrum of Coumarin 102 and its hydrogen-bonded complexes. J Comput Chem 2010; 32:545-53. [DOI: 10.1002/jcc.21632] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 05/27/2010] [Accepted: 06/21/2010] [Indexed: 12/19/2022]
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32
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Freitas AA, Quina FH, Fernandes AC, Maçanita AAL. Picosecond Dynamics of the Prototropic Reactions of 7-Hydroxyflavylium Photoacids Anchored at an Anionic Micellar Surface. J Phys Chem A 2010; 114:4188-96. [DOI: 10.1021/jp100281u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adilson A. Freitas
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - Frank H. Quina
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - Ana C. Fernandes
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
| | - António A. L. Maçanita
- Departamento Engenharia Química, Centro de Química Estrutural, IST/UTL, Lisbon 1049-001, Portugal, Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo 05513-970, Brazil
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Choudhury SD, Pal H. Modulation of Excited-State Proton-Transfer Reactions of 7-Hydroxy-4-methylcoumarin in Ionic and Nonionic Reverse Micelles. J Phys Chem B 2009; 113:6736-44. [DOI: 10.1021/jp8111759] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Haridas Pal
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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Sobolewski AL, Shemesh D, Domcke W. Computational studies of the photophysics of neutral and zwitterionic amino acids in an aqueous environment: tyrosine-(H(2)O)(2) and tryptophan-(H(2)O)(2) clusters. J Phys Chem A 2009; 113:542-50. [PMID: 19099467 DOI: 10.1021/jp8091754] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tyrosine-(H(2)O)(2) and tryptophan-(H(2)O)(2) clusters have been considered as models for the study of the photochemistry of neutral and zwitterionic tyrosine and tryptophan in an aqueous environment. It has been found that the detachment of neutral NH(3) in the S(1) state of the zwitterionic clusters leads to a low-lying conical intersection of the S(1) and S(0) energy surfaces. This conical intersection can provide the mechanism for efficient radiationless deactivation of the excited state back to the ground state or, alternatively, deamination (loss of ammonia). These results provide a mechanistic explanation of the efficient fluorescence quenching and the high quantum yield of ammonia in the UV photolysis of tyrosine and tryptophan in aqueous solution.
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Zhao W, Pan L, Bian W, Wang J. Influence of Solvent Polarity and Hydrogen Bonding on the Electronic Transition of Coumarin 120: A TDDFT Study. Chemphyschem 2008; 9:1593-602. [DOI: 10.1002/cphc.200800131] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Choudhury SD, Nath S, Pal H. Excited-State Proton Transfer Behavior of 7-Hydroxy-4-methylcoumarin in AOT Reverse Micelles. J Phys Chem B 2008; 112:7748-53. [DOI: 10.1021/jp8004019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Sukhendu Nath
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Haridas Pal
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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37
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Investigation of the structures and electronic spectra of two coumarins with heterocyclic substituents through TD-DFT calculations. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2008.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Thut M, Tanner C, Steinlin A, Leutwyler S. Time-Dependent Density Functional Theory As a Tool for Isomer Assignments of Hydrogen-Bonded Solute·Solvent Clusters. J Phys Chem A 2008; 112:5566-72. [DOI: 10.1021/jp801044x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Markus Thut
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
| | - Christian Tanner
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
| | - Andreas Steinlin
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
| | - Samuel Leutwyler
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
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