1
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Soloperto S, Olivier S, Poret A, Minier C, Halm-Lemeille MP, Jozet-Alves C, Aroua S. Effects of 17α-ethinylestradiol on the neuroendocrine gonadotropic system and behavior of European sea bass larvae ( Dicentrarchus labrax). J Toxicol Environ Health A 2023; 86:198-215. [PMID: 36803253 DOI: 10.1080/15287394.2023.2177781] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The widespread use of 17α-ethinylestradiol (EE2), and other estrogenic endocrine disruptors, results in a continuous release of estrogenic compounds into aquatic environments. Xenoestrogens may interfere with the neuroendocrine system of aquatic organisms and may produce various adverse effects. The aim of the present study was to expose European sea bass larvae (Dicentrarchus labrax) to EE2 (0.5 and 50 nM) for 8 d and determine the expression levels of brain aromatase (cyp19a1b), gonadotropin-releasing hormones (gnrh1, gnrh2, gnrh3), kisspeptins (kiss1, kiss2) and estrogen receptors (esr1, esr2a, esr2b, gpera, gperb). Growth and behavior of larvae as evidenced by locomotor activity and anxiety-like behaviors were measured 8 d after EE2 treatment and a depuration period of 20 d. Exposure to 0.5 nM EE2 induced a significant increase in cyp19a1b expression levels, while upregulation of gnrh2, kiss1, and cyp19a1b expression was noted after 8 d at 50 nM EE2. Standard length at the end of the exposure phase was significantly lower in larvae exposed to 50 nM EE2 than in control; however, this effect was no longer observed after the depuration phase. The upregulation of gnrh2, kiss1, and cyp19a1b expression levels was found in conjunction with elevation in locomotor activity and anxiety-like behaviors in larvae. Behavioral alterations were still detected at the end of the depuration phase. Evidence indicates that the long-lasting effects of EE2 on behavior might impact normal development and subsequent fitness of exposed fish.
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Affiliation(s)
- S Soloperto
- Normandie Univ, UNIHAVRE, Le Havre Cedex, France
| | - S Olivier
- Normandie Univ, UNIHAVRE, Le Havre Cedex, France
| | - A Poret
- Normandie Univ, UNIHAVRE, Le Havre Cedex, France
| | - C Minier
- Normandie Univ, UNIHAVRE, Le Havre Cedex, France
| | - M P Halm-Lemeille
- Ifremer Port-en-Bessin, LaboratoireEnvironnement Ressources de Normandie, Port-en-Bessin, France
| | - C Jozet-Alves
- Normandie Univ, Unicaen, CNRS, Caen, France
- Univ Rennes, CNRS, Rennes, France
| | - S Aroua
- Normandie Univ, UNIHAVRE, Le Havre Cedex, France
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2
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Semivrazhskaya O, Aroua S, Yulikov M, Romero-Rivera A, Stevenson S, Garcia-Borràs M, Osuna S, Yamakoshi Y. Regioselective Synthesis and Characterization of Tris- and Tetra-Prato Adducts of M 3N@C 80 (M = Y, Gd). J Am Chem Soc 2020; 142:12954-12965. [PMID: 32586092 DOI: 10.1021/jacs.9b13768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The tris- and tetra-adducts of M3N@Ih-C80 metallofullerenes were synthesized and characterized for the first time. The 1,3-dipolar cycloaddition (Prato reaction) of Y3N@Ih-C80 and Gd3N@Ih-C80 with an excess of N-ethylglycine and formaldehyde provided tris- and tetra-fulleropyrrolidine adducts in a regioselective manner. Purification by HPLC and analyses of the isolated peaks by NMR, MS, and vis-NIR spectra revealed that the major products were four tris- and one tetra-isomers for both Y3N@Ih-C80 and Gd3N@Ih-C80. Considering the large number of possible isomers (e.g., at least 1140 isomers for the tris-adduct), the limited number of isomers obtained indicated that the reactions proceeded with high regioselectivity. NMR analyses of the Y3N@Ih-C80 adducts found that the tris-adducts were all-[6,6]- or [6,6][6,6][5,6]-isomers and that some showed mutual isomerization or remained intact at room temperature. The tetra-adduct obtained as a major product was all-[6,6] and stable. For the structural elucidation of Gd3N@Ih-C80 tris- and tetra-adducts, density functional theory (DFT) calculations were performed to estimate the relative stabilities of tris- and tetra-adducts formed upon Prato functionalization of the most pyramidalized regions of the fullerene structure. The most stable structures corresponded to additions on the most pyramidalized (i.e., strained) bonds. Taking together the experimental vis-NIR spectra, NMR assignments, and the computed relative DFT stabilities of the potential tris- and tetra-adducts, the structures of the isolated adducts were elucidated. Electron resonance (ESR) measurements measurements of pristine, bis-, and tris-adducts of Gd3N@C80 suggested that the rotation of the endohedral metal cluster slowed upon increase of the addition numbers to C80 cage, which is favored for accommodating the Gd atoms of the relatively large Gd3N cluster inner space at the sp3 addition sites. This is presumably related to the high regioselectivity in the Prato addition reaction driven by the strain release of the Gd3N@C80 fullerene structure.
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Affiliation(s)
- Olesya Semivrazhskaya
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Safwan Aroua
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Maxim Yulikov
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Adrian Romero-Rivera
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Maria Aurelia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Steven Stevenson
- Department of Chemistry, Purdue University Fort Wayne, Fort Wayne, Indiana 46805, United States
| | - Marc Garcia-Borràs
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Maria Aurelia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Sílvia Osuna
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, Maria Aurelia Capmany 69, 17003 Girona, Catalonia, Spain.,ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalonia, Spain
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
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3
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Semivrazhskaya O, Romero-Rivera A, Aroua S, Troyanov SI, Garcia-Borràs M, Stevenson S, Osuna S, Yamakoshi Y. Structures of Gd 3N@C 80 Prato Bis-Adducts: Crystal Structure, Thermal Isomerization, and Computational Study. J Am Chem Soc 2019; 141:10988-10993. [PMID: 31266302 DOI: 10.1021/jacs.9b05603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The structures of two bis-ethylpyrrolidinoadducts of Gd3N@Ih-C80, obtained by regioselective 1,3-dipolar cycloadditions, were elucidated by single crystal X-ray, visible-near infrared (vis-NIR) spectra, studies on their thermal isomerization, and theoretical calculations. The structure of the minor-bis-adduct reveals a C2-symmetric carbon cage with [6,6][6,6]-addition sites and with an endohedral Gd3N cluster that is completely flattened. This is the first example of a crystal structure of Gd3N@Ih-C80 derivatives. The structure of the major-bis-adduct was inferred by the vis-NIR spectrum being corresponded to the structure of a previously reported major-bis-adduct of Y3N@Ih-C80 known to have an asymmetric [6,6][6,6]-structure. Based on experimental results showing that the minor-bis-adduct of Gd3N@Ih-C80 isomerized to the major-adduct, a possible second addition site was elucidated with support from density functional theory calculations.
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Affiliation(s)
- Olesya Semivrazhskaya
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Adrian Romero-Rivera
- CompBioLab, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , Campus Montilivi, 17071 Girona , Catalonia , Spain
| | - Safwan Aroua
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Sergey I Troyanov
- Department of Chemistry , Moscow State University , Leninskie gory, 119991 Moscow , Russia
| | - Marc Garcia-Borràs
- CompBioLab, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , Campus Montilivi, 17071 Girona , Catalonia , Spain
| | - Steven Stevenson
- Department of Chemistry , Purdue University Fort Wayne , Fort Wayne , Indiana 46805 , United States
| | - Sílvia Osuna
- CompBioLab, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química , Universitat de Girona , Campus Montilivi, 17071 Girona , Catalonia , Spain.,ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Catalonia , Spain
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie, ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
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4
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Aroua S, Ray A, Ebert M, Yamakoshi Y. Effect of Temperature and Solvent on the Structure of Amide Cavitands. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900043] [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)
- Safwan Aroua
- Laboratorium für Organische ChemieETH Zürich Vladimir-Prelog-Weg 3 CH-8093 Zürich Switzerland
| | - Ankita Ray
- Laboratorium für Organische ChemieETH Zürich Vladimir-Prelog-Weg 3 CH-8093 Zürich Switzerland
| | - Marc‐Olivier Ebert
- Laboratorium für Organische ChemieETH Zürich Vladimir-Prelog-Weg 3 CH-8093 Zürich Switzerland
| | - Yoko Yamakoshi
- Laboratorium für Organische ChemieETH Zürich Vladimir-Prelog-Weg 3 CH-8093 Zürich Switzerland
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5
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Abstract
A series of quinoxaline cavitands bearing pendant amide groups with various substituent sizes (Et, iPr, tBu) were synthesized, and their cavity size/structure were investigated by X-ray and NMR analyses. In the case of the Et or iPr amide cavitand, the conformation of the molecule was in the vase form, while the bulky tBu amide cavitand gave the kite conformation at room temperature. X-ray crystal structures of Et and iPr cavitands clearly showed the intramolecular H-bondings to influence the conformation and the cavity sizes dependent on the bulkiness of functional groups. The 1H NMR spectrum revealed that the Et cavitand can encapsulate an adamantane guest compound with slow exchange.
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Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Andrew N Lowell
- Department of Chemistry , University of Pennsylvania , 231 South, 34th Street , Philadelphia , PA19104-6323 , United States
| | - Ankita Ray
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Nils Trapp
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - W Bernd Schweizer
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Marc-Olivier Ebert
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie , ETH Zürich , Vladimir-Prelog-Weg 3 , CH8093 Zürich , Switzerland.,Department of Chemistry , University of Pennsylvania , 231 South, 34th Street , Philadelphia , PA19104-6323 , United States
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6
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Tiu EGV, Liosi K, Aroua S, Yamakoshi Y. Micelle vs. vesicle formation controlled by distal functionalization of C 60-PEG conjugates. J Mater Chem B 2017; 5:6676-6680. [PMID: 32264430 DOI: 10.1039/c7tb00829e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
An amphiphilic C60-PEG conjugate was modified by the addition of cationic moieties in the hydrophobic C60 part to provide the related bis- and tris-adducts and their self-assembling structures were compared. All of these materials were water-soluble and their supramolecular structures were investigated in the aqueous phase using tensiometry, DLS, and STEM techniques. While mono- and bis-adducts formed micelle-type supramolecular structures, the tris-one with two additional cationic pyrrolidine groups showed the formation of larger particles as indicated by DLS data. Further, the STEM image of the tris-adduct showed a vesicle-type supramolecular structure with, presumably, an internal water-phase inside.
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Affiliation(s)
- Elisha G V Tiu
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, CH8093 Zürich, Switzerland.
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7
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Affiliation(s)
- Safwan Aroua
- Laboratoire de Chimie des Processus Biologiques; Collège de France; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
| | - Tanya K. Todorova
- Laboratoire de Chimie des Processus Biologiques; Collège de France; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
| | - Victor Mougel
- Laboratoire de Chimie des Processus Biologiques; Collège de France; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
| | - Paul Hommes
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustrasse 3 14195 Berlin Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustrasse 3 14195 Berlin Germany
| | - Marc Fontecave
- Laboratoire de Chimie des Processus Biologiques; Collège de France; 11 Place Marcelin Berthelot 75231 Paris Cedex 05 France
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8
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Royappa ARNS, Ayer M, Fracassi A, Ebert M, Aroua S, Yamakoshi Y. Conformationally Selective Synthesis of Mononitrocalix[4]arene in
Cone
or
Partial Cone. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201600391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Maxime Ayer
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH 8093 Zürich
| | - Alessandro Fracassi
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH 8093 Zürich
| | - Marc‐Olivier Ebert
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH 8093 Zürich
| | - Safwan Aroua
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH 8093 Zürich
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH 8093 Zürich
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9
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Aroua S, Todorova TK, Hommes P, Chamoreau LM, Reissig HU, Mougel V, Fontecave M. Synthesis, Characterization, and DFT Analysis of Bis-Terpyridyl-Based Molecular Cobalt Complexes. Inorg Chem 2017; 56:5930-5940. [DOI: 10.1021/acs.inorgchem.7b00595] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Safwan Aroua
- Laboratoire de Chimie
des Processus Biologiques, UMR 8229 CNRS, Collège de France, Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Tanya K. Todorova
- Laboratoire de Chimie
des Processus Biologiques, UMR 8229 CNRS, Collège de France, Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Paul Hommes
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Lise-Marie Chamoreau
- Sorbonne Universités, UPMC Université Paris 6, Institut Parisien de
Chimie Moléculaire, UMR 8232 CNRS, 4 Place Jussieu, 75252 Paris Cedex 5, France
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Victor Mougel
- Laboratoire de Chimie
des Processus Biologiques, UMR 8229 CNRS, Collège de France, Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Marc Fontecave
- Laboratoire de Chimie
des Processus Biologiques, UMR 8229 CNRS, Collège de France, Université Paris 6, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
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10
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Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH‐8093, Zurich
| | | | | | - Yoko Yamakoshi
- Laboratorium für Organische Chemie ETH Zürich Vladimir‐Prelog‐Weg 3 CH‐8093, Zurich
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11
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Aroua S, Tiu EGV, Ayer M, Ishikawa T, Yamakoshi Y. RAFT synthesis of poly(vinylpyrrolidone) amine and preparation of a water-soluble C60-PVP conjugate. Polym Chem 2015. [DOI: 10.1039/c4py01333f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A well-defined C60-PVP conjugate with a sufficient water-solubility was successfully synthesized by RAFT polymerization of NVP and subsequent reaction with a C60 acid anhydride derivative.
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Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie
- ETH-Zürich
- Vladimir-Prelog-Weg 3
- CH-8093 Zürich
- Switzerland
| | | | - Maxime Ayer
- Laboratorium für Organische Chemie
- ETH-Zürich
- Vladimir-Prelog-Weg 3
- CH-8093 Zürich
- Switzerland
| | - Takashi Ishikawa
- Laboratory of Biomolecular Research
- Paul Scherrer Institute
- Villigen
- Switzerland
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie
- ETH-Zürich
- Vladimir-Prelog-Weg 3
- CH-8093 Zürich
- Switzerland
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12
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Aroua S, Garcia-Borràs M, Bölter MF, Osuna S, Yamakoshi Y. Endohedral metal-induced regioselective formation of bis-Prato adduct of Y3N@I(h)-C80 and Gd3N@I(h)-C80. J Am Chem Soc 2014; 137:58-61. [PMID: 25549139 DOI: 10.1021/ja511008z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Regioselective bisaddition of M3N@Ih-C80 (M = Y, Gd) was observed for the first time in the Prato reaction with N-ethylglycine and formaldehyde. The main kinetic bisadduct of Y3N@C80 was determined to be a [6,6],[6,6] adduct by (1)H and (13)C NMR and vis/NIR spectroscopy, and it converted to a mixture of regioisomers upon heating via a sigmatropic rearrangement. The main kinetic bisadduct of Gd3N@C80 (the [6,6],[6,6] adduct on the basis of vis/NIR data) existed stably under thermal conditions without isomerization. The likely position of the second addition of the Gd3N@C80 bisadduct was predicted by DFT calculations.
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Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie, ETH-Zürich , Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
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13
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Aroua S, Garcia‐Borràs M, Osuna S, Yamakoshi Y. Essential Factors for Control of the Equilibrium in the Reversible Rearrangement of M
3
N@
I
h
‐C
80
Fulleropyrrolidines: Exohedral Functional Groups versus Endohedral Metal Clusters. Chemistry 2014; 20:14032-9. [PMID: 25196964 DOI: 10.1002/chem.201403743] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie, ETH‐Zürich, Vladimir‐Prelog‐Weg 3, CH‐8093 Zürich (Switzerland), Fax: (+41) 44 633‐1235
| | - Marc Garcia‐Borràs
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia (Spain)
| | - Sílvia Osuna
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia (Spain)
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie, ETH‐Zürich, Vladimir‐Prelog‐Weg 3, CH‐8093 Zürich (Switzerland), Fax: (+41) 44 633‐1235
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14
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Aroua S, Schweizer WB, Yamakoshi Y. C60 Pyrrolidine Bis-carboxylic Acid Derivative as a Versatile Precursor for Biocompatible Fullerenes. Org Lett 2014; 16:1688-91. [DOI: 10.1021/ol500363r] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Safwan Aroua
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - W. Bernd Schweizer
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Yoko Yamakoshi
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
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15
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Yamakoshi Y, Aroua S, Nguyen TMD, Iwamoto Y, Ohnishi T. Water-soluble fullerene materials for bioapplications: photoinduced reactive oxygen species generation. Faraday Discuss 2014; 173:287-96. [DOI: 10.1039/c4fd00076e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoinduced reactive oxygen species (ROS) generation from several water-soluble fullerenes was examined. Macromolecular or small molecular water-soluble fullerene complexes/derivatives were prepared and their 1O2 and O2˙− generation abilities were evaluated by ESR spin-trapping methods. As a result, efficient 1O2 generation was detected from photoexcited C60, not only in organic solvents, but also in aqueous media and especially from small molecule C60–carboxylic acid derivatives. Whereas efficient O2˙− generation was observed in the aqueous solution of the C60/γ-CD complex under photoirradiation.
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Affiliation(s)
- Yoko Yamakoshi
- Laboratorium für Organische Chemie
- ETH-Zürich
- CH8093 Zürich, Switzerland
- Department of Radiology
- University of Pennsylvania Perelman School of Medicine
| | - Safwan Aroua
- Laboratorium für Organische Chemie
- ETH-Zürich
- CH8093 Zürich, Switzerland
- Department of Radiology
- University of Pennsylvania Perelman School of Medicine
| | - Thach-Mien Duong Nguyen
- Department of Radiology
- University of Pennsylvania Perelman School of Medicine
- Philadelphia PA19104, USA
| | - Yuko Iwamoto
- Laboratorium für Organische Chemie
- ETH-Zürich
- CH8093 Zürich, Switzerland
| | - Tsuyoshi Ohnishi
- Department of Biochemistry and Biophysics
- University of Pennsylvania Perelman School of Medicine
- Philadelphia PA19104, USA
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16
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Oriana S, Aroua S, Söllner JOB, Ma XJ, Iwamoto Y, Yamakoshi Y. Water-soluble C60– and C70–PVP polymers for biomaterials with efficient 1O2 generation. Chem Commun (Camb) 2013; 49:9302-4. [DOI: 10.1039/c3cc45501g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Affiliation(s)
- Safwan Aroua
- Laboratorium für Organische Chemie, ETH-Zürich, Wolfgang-Pauli-Strasse 10, CH-8093
Zürich, Switzerland
| | - Yoko Yamakoshi
- Laboratorium für Organische Chemie, ETH-Zürich, Wolfgang-Pauli-Strasse 10, CH-8093
Zürich, Switzerland
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Griveau S, Aroua S, Bediwy D, Cornut R, Lefrou C, Bedioui F. Spontaneous adsorbed layers of 4-nitrobenzenediazonium salt on gold and glassy carbon: Local characterization by SECM and electron-transfer kinetics evaluation. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.05.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Takamatsu D, Fukui KI, Aroua S, Yamakoshi Y. Photoswitching tripodal single molecular tip for noncontact AFM measurements: synthesis, immobilization, and reversible configurational change on gold surface. Org Biomol Chem 2010; 8:3655-64. [PMID: 20589278 DOI: 10.1039/c002657c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tripodal molecules consisting of a tetrasubstituted adamantane with three phenylacetylene legs and a reversibly photoswitching apex were designed as "single molecular tips" for both chemical and topographical characterization of the substrate surface. By covalent attachment onto gold-coated AFM tips through three S-Au bonds, these rigid tripodal molecules are expected to act as sharp, robust, and stationary molecular tips whose configuration can be reversibly changed upon irradiation with UV or visible light. In this report, the full account of the syntheses of two photoswitching tripodal molecular tips, their immobilization onto Au(111) surfaces, and the detection of photoinduced configurational change on Au(111) surface by SPM measurements are documented.
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Affiliation(s)
- Daiko Takamatsu
- Department of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
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