المؤلفون: Sebastian Notz, Heinrich Lang, Eduard Kovalski, Stefan Spange, Thomas Blaudeck, Stefan E. Schulz, Jörg Schuster, Dominique Miesel, Alexander Hildebrandt, Katja Schreiter, Tobias Rüffer, Andrea Preuß, Marcus Korb, Xiao Hu

المصدر: Chemistry (Weinheim an Der Bergstrasse, Germany)

مصطلحات موضوعية: solvatochromism, Carbon nanotube, 010402 general chemistry, Electrochemistry, 01 natural sciences, Redox, Catalysis, law.invention, Ferrocene Complexes | Hot Paper, Electron transfer, chemistry.chemical_compound, law, Full Paper, 010405 organic chemistry, Organic Chemistry, Solvatochromism, ferrocene, pyrene, General Chemistry, Full Papers, (spectro)electrochemistry, 0104 chemical sciences, Crystallography, chemistry, Ferrocene, density functional calculations, solid-state structures, Surface modification, Pyrene

الوصف: The synthesis of 1‐Fc‐ (3), 1‐Br‐6‐Fc‐ (5 a), 2‐Br‐7‐Fc‐ (7 a), 1,6‐Fc2‐ (5 b), 2,7‐Fc2‐pyrene (7 b), 3,6‐Fc2‐9,10‐phenanthrenedione (10), and 3,6‐Fc2‐9,10‐dimethoxyphenanthrene (12; Fc=Fe(η5‐C5H4)(η5‐C5H5)) is discussed. Of these compounds, 10 and 12 form 1D or 2D coordination polymers in the solid state. (Spectro)Electrochemical studies confirmed reversible Fc/Fc+ redox events between −130 and 160 mV. 1,6‐ and 2,7‐Substitution in 5 a (E°′=−130 mV) and 7 a (E°′=50 mV) influences the redox potentials, whereas the ones of 5 b and 7 b (E°′=20 mV) are independent. Compounds 5 b, 7 b, 10, and 12 show single Fc oxidation processes with redox splittings between 70 and 100 mV. UV/Vis/NIR spectroelectrochemistry confirmed a weak electron transfer between FeII/FeIII in mixed‐valent [5 b]+ and [12]+. DFT calculations showed that 5 b non‐covalently interacts with the single‐walled carbon nanotube (SWCNT) sidewalls as proven by, for example, disentangling experiments. In addition, CV studies of the as‐obtained dispersions confirmed exohedral attachment of 5 b at the SWCNTs.
Ferrocene complexes: The synthesis of 1‐Fc‐, 1‐Br‐6‐Fc‐, 2‐Br‐7‐Fc‐, 1,6‐Fc2‐, 2,7‐Fc2‐pyrene, 3,6‐Fc2‐9,10‐phenanthrenedione, and 3,6‐Fc2‐9,10‐dimethoxyphenanthrene (Fc=Fe(η5‐C5H4)(η5‐C5H5)) is discussed. Two of these compounds form 1D or 2D coordination polymers in the solid state. (Spectro)electrochemical studies confirmed reversible Fc/Fc+ redox events between −130 and 160 mV.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24259ab3b404061eec0bd452c244cf18Test
https://doi.org/10.1002/chem.201904450Test

المؤلفون: Dubal, Deepak P., Holze, Rudolf, Gómez-Romero, Pedro

مصطلحات موضوعية: Capacitors, Electrochemistry, Manganese, Nanostructures, Solid-state structures

الوصف: Altres ajuts: Beatriu de Pinós (BP-DGR-2013) ; Reported is the synthesis of 3D hierarchical structures based on one-dimensional MnO2 nanobuilding blocks (nanorods, nanowires, and nanoneedles) by means of a facile and scalable coprecipitation method and their use as electrodes for the assembly of all-solid-state supercapacitors. Asymmetric devices were also assembled by using these nanostructured MnO2 materials as the positive electrode and reduced graphene oxide (rGO) as the negative electrode with a polymeric gel electrolyte. The asymmetric cells successfully extend the working voltage windows beyond 1.4 V and allowed for a maximum voltage of 1.8 V. An asymmetric device based on hierarchical nanoneedle-like MnO2 and rGO achieved a maximum specific capacitance of 99 F g−1 at a scan rate of 10 mV s−1 with a stable operational voltage of 1.8 V. This high value allowed for a large specific energy of 24.12 Wh kg−1.

وصف الملف: application/pdf

العلاقة: Ministerio de Economía y Competitividad SEV-2013-0295; ChemPlusChem; Vol. 80, issue 6 (June 2015), p. 944-951; https://ddd.uab.cat/record/270826Test; urn:10.1002/cplu.201500054; urn:oai:ddd.uab.cat:270826; urn:scopus_id:85027922290; urn:articleid:21926506v80n6p944; urn:icn2uab:4130595; urn:oai:egreta.uab.cat:publications/4408c31c-f79d-4c6a-b1f6-f57d7bec68a4

الإتاحة: https://ddd.uab.cat/record/270826Test

المؤلفون: Dinoi, Chiara, Guedes da Silva, M. Fátima C., Alegria, Elisabete, C B A, Smoleński, Piotr, Martins, Luísa, M D R S, Poli, Rinaldo, Pombeiro, Armando, J L

المساهمون: Centro de Quimica Estrutural (CQE), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

المصدر: ISSN: 1434-1948.

مصطلحات موضوعية: Molybdenum, Scorpionates, Electrochemistry, Solid‐state structures, [CHIM.COOR]Chemical Sciences/Coordination chemistry

الوصف: International audience ; The tris(1‐pyrazolyl)methanesulfonate lithium salt Li(Tpms) [Tpms = SO3C(pz)3–] reacts with [Mo(CO)6] in NCMe heated at reflux to yield Li[Mo(Tpms)(CO)3] (1), which, upon crystallization from thf, forms the coordination polymer [Mo(Tpms)(CO)2(μ‐CO)Li(thf)2]n (2). Reaction of 1 with I2, HBF4 or AgBF4 yields [Mo(Tpms)I(CO)3] (3), [Mo(Tpms)H(CO)3] (5) or [Mo(Tpms)O2]2(μ‐O) (7), respectively. The high‐oxidation‐state dinuclear complexes [{Mo(Tpms)O(μ‐O)}2] (4) and [{Mo(tpms)OCl}2](μ‐O) (6) are formed upon exposure to air of solutions of 3 and 5, respectively. Compounds 1–7, which appear to be the first tris(pyrazolyl)methanesulfonate complexes of molybdenum to be reported, were characterized by IR, 1H and 13C NMR spectroscopy, ESI‐MS, elemental analysis, cyclic voltammetry and, in the cases of Li(Tpms) and compounds 2, 4·2CH3CN, 6·6CHCl3 and 7, by X‐ray diffraction analyses. Li(Tpms) forms a 1D polymeric structure {i.e., [Li(tpms)]n} with Tpms as a tetradentate N2O2 chelating ligand that bridges two Li cations with distorted tetrahedral coordination. Compound 2 is a 1D coordination polymer in which Tpms acts as a bridging tetradentate N3O ligand and each Li(thf)2+ moiety is coordinated by one bridging CO ligand and by the sulfonyl group of a contiguous monomeric unit. In 4, 6 and 7, the Tpms ligand is a tridentate chelator either in the NNO (in 4) or in the NNN (in 6 and 7) fashion. Complexes 1, 3 and 5 exhibit, by cyclic voltammetry, a single‐electron oxidation at oxidation potential values that indicate that the Tpms ligand has an electron‐donor character weaker than that of cyclopentadienyl.

العلاقة: hal-03177784; https://hal.science/hal-03177784Test; https://hal.science/hal-03177784/documentTest; https://hal.science/hal-03177784/file/281-10.1002-ejic.201000018-Accepted.pdfTest

الإتاحة: https://doi.org/10.1002/ejic.201000018Test
https://hal.science/hal-03177784Test
https://hal.science/hal-03177784/documentTest
https://hal.science/hal-03177784/file/281-10.1002-ejic.201000018-Accepted.pdfTest

المؤلفون: Dubal, Deepak, Holze, Rudolf, Gomez-Romero, Pedro

المصدر: ChemPlusChem

مصطلحات موضوعية: capacitors, electrochemistry, manganese, nanostructures, solid-state structures

الوصف: Reported is the synthesis of 3D hierarchical structures based on one-dimensional MnO2 nanobuilding blocks (nanorods, nanowires, and nanoneedles) by means of a facile and scalable coprecipitation method and their use as electrodes for the assembly of all-solid-state supercapacitors. Asymmetric devices were also assembled by using these nanostructured MnO2 materials as the positive electrode and reduced graphene oxide (rGO) as the negative electrode with a polymeric gel electrolyte. The asymmetric cells successfully extend the working voltage windows beyond 1.4 V and allowed for a maximum voltage of 1.8 V. An asymmetric device based on hierarchical nanoneedle-like MnO2 and rGO achieved a maximum specific capacitance of 99 Fg-1 at a scan rate of 10 mVs-1 with a stable operational voltage of 1.8 V. This high value allowed for a large specific energy of 24.12 Whkg-1. New builders on the block: The synthesis of 3D hierarchical structures based on 1D MnO2 nanobuilding blocks by means of a facile and scalable coprecipitation method and their use as electrodes for the assembly of all-solid-state supercapacitors is described. The figure show an example of an asymmetric device based on hierarchical nanoneedle (Nn)-like MnO2 and reduced graphene oxide.

العلاقة: Dubal, Deepak, Holze, Rudolf, & Gomez-Romero, Pedro (2015) Three-dimensional arrays of 1D MnO2 nanocrystals for all-solid-state asymmetric supercapacitors. ChemPlusChem, 80(6), pp. 944-951.; https://eprints.qut.edu.au/129744Test/; Institute for Future Environments; Science & Engineering Faculty

الإتاحة: https://doi.org/10.1002/cplu.201500054Test
https://eprints.qut.edu.au/129744Test/

المؤلفون: Pedro Gómez-Romero, Rudolf Holze, Deepak P. Dubal

المساهمون: Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Alexander von Humboldt Foundation

المصدر: Digital.CSIC. Repositorio Institucional del CSIC
instname

مصطلحات موضوعية: Supercapacitor, Manganese, Materials science, Graphene, Coprecipitation, Nanowire, Nanotechnology, General Chemistry, Capacitors, Capacitance, Solid-state structures, law.invention, Nanostructures, law, Electrode, Electrochemistry, Nanorod, Nanoneedle

الوصف: Reported is the synthesis of 3D hierarchical structures based on one-dimensional MnO2 nanobuilding blocks (nanorods, nanowires, and nanoneedles) by means of a facile and scalable coprecipitation method and their use as electrodes for the assembly of all-solid-state supercapacitors. Asymmetric devices were also assembled by using these nanostructured MnO2 materials as the positive electrode and reduced graphene oxide (rGO) as the negative electrode with a polymeric gel electrolyte. The asymmetric cells successfully extend the working voltage windows beyond 1.4 V and allowed for a maximum voltage of 1.8 V. An asymmetric device based on hierarchical nanoneedle-like MnO2 and rGO achieved a maximum specific capacitance of 99 F g−1 at a scan rate of 10 mV s−1 with a stable operational voltage of 1.8 V. This high value allowed for a large specific energy of 24.12 Wh kg−1.
Funded by: Alexander von Humboldt Foundation;Beatriu de Pinos Program. Grant Number: BP-DGR-2013; Catalan System of Science and Technology and Spanish MINECO. Grant Number: SEV-2013-0295.

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::109a8c557ce775f89321852f0f3ec96bTest
https://ddd.uab.cat/record/270826Test

المؤلفون: W Liu, Jun Liu, K Chen, S Ji, Y Wan, Y Zhou, D Xue, Peter Hodgson, Yuncang Li

مصطلحات موضوعية: cathodes, electrochemistry, hollow spheres, lithium-ion batteries, solid-state structures, Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, HIGH-CAPACITY ANODES, FACILE SYNTHESIS, THIN-FILMS, ION, SPINEL, ELECTRODE, STORAGE, MICROCUBES, CONVERSION, FADE

الوصف: Enhancing the electrochemical performance of the LiMn2O4 hollow microsphere cathode with a LiNi0.5Mn1.5O4 coated layer

العلاقة: http://hdl.handle.net/10536/DRO/DU:30060916Test; https://figshare.com/articles/journal_contribution/Enhancing_the_electrochemical_performance_of_the_LiMn2O4_hollow_microsphere_cathode_with_a_LiNi0_5Mn1_5O4_coated_layer/20947429Test

الإتاحة: http://hdl.handle.net/10536/DRO/DU:30060916Test
https://figshare.com/articles/journal_contribution/Enhancing_the_electrochemical_performance_of_the_LiMn2O4_hollow_microsphere_cathode_with_a_LiNi0_5Mn1_5O4_coated_layer/20947429Test

المؤلفون: Rinaldo Poli, Piotr Smoleński, Elisabete C. B. A. Alegria, M. Fátima C. Guedes da Silva, Chiara Dinoi, Luísa M. D. R. S. Martins, Armando J. L. Pombeiro

المساهمون: Centro de Quimica Estrutural (CQE), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

المصدر: European Journal of Inorganic Chemistry
European Journal of Inorganic Chemistry, Wiley-VCH Verlag, 2010, 2010 (16), pp.2415-2424. ⟨10.1002/ejic.201000018⟩
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação
European Journal of Inorganic Chemistry, 2010, 2010 (16), pp.2415-2424. ⟨10.1002/ejic.201000018⟩

مصطلحات موضوعية: Sulfonyl, chemistry.chemical_classification, Molybdenum, 010405 organic chemistry, Coordination polymer, Stereochemistry, chemistry.chemical_element, Solid‐state structures, 010402 general chemistry, Electrochemistry, 01 natural sciences, Medicinal chemistry, Solid-state structures, 0104 chemical sciences, Inorganic Chemistry, Scorpionates, chemistry.chemical_compound, Monomer, chemistry, Cyclopentadienyl complex, Moiety, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Cyclic voltammetry

الوصف: International audience; The tris(1‐pyrazolyl)methanesulfonate lithium salt Li(Tpms) [Tpms = SO3C(pz)3–] reacts with [Mo(CO)6] in NCMe heated at reflux to yield Li[Mo(Tpms)(CO)3] (1), which, upon crystallization from thf, forms the coordination polymer [Mo(Tpms)(CO)2(μ‐CO)Li(thf)2]n (2). Reaction of 1 with I2, HBF4 or AgBF4 yields [Mo(Tpms)I(CO)3] (3), [Mo(Tpms)H(CO)3] (5) or [Mo(Tpms)O2]2(μ‐O) (7), respectively. The high‐oxidation‐state dinuclear complexes [{Mo(Tpms)O(μ‐O)}2] (4) and [{Mo(tpms)OCl}2](μ‐O) (6) are formed upon exposure to air of solutions of 3 and 5, respectively. Compounds 1–7, which appear to be the first tris(pyrazolyl)methanesulfonate complexes of molybdenum to be reported, were characterized by IR, 1H and 13C NMR spectroscopy, ESI‐MS, elemental analysis, cyclic voltammetry and, in the cases of Li(Tpms) and compounds 2, 4·2CH3CN, 6·6CHCl3 and 7, by X‐ray diffraction analyses. Li(Tpms) forms a 1D polymeric structure {i.e., [Li(tpms)]n} with Tpms as a tetradentate N2O2 chelating ligand that bridges two Li cations with distorted tetrahedral coordination. Compound 2 is a 1D coordination polymer in which Tpms acts as a bridging tetradentate N3O ligand and each Li(thf)2+ moiety is coordinated by one bridging CO ligand and by the sulfonyl group of a contiguous monomeric unit. In 4, 6 and 7, the Tpms ligand is a tridentate chelator either in the NNO (in 4) or in the NNN (in 6 and 7) fashion. Complexes 1, 3 and 5 exhibit, by cyclic voltammetry, a single‐electron oxidation at oxidation potential values that indicate that the Tpms ligand has an electron‐donor character weaker than that of cyclopentadienyl.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5258515db8e0495cb01b06a2571f8a37Test
https://hal.archives-ouvertes.fr/hal-03177784Test

المؤلفون: Dipendu Mandal, Arunabha Thakur, Sundargopal Ghosh

المصدر: IndraStra Global.

مصطلحات موضوعية: Limit of detection, Photochemistry, Electrochemistry, Iron compounds, Lead compounds, Redox, Iron oxides, Solid-state structures, Fluorescence, Analytical Chemistry, Metal, Presence of water, Electrospray ionization mass spectrometry, Naked-eye, Chemo-sensors, Fluorescence enhancement, Nuclear magnetic resonance spectroscopy, Aqueous environment, Detection limit, Metal cation, Aqueous solution, Mass spectrometry, Chromogenic, Chemistry, Cadmium compounds, Mercury (metal), Organometallics, X ray diffraction analysis, Spectrometric analysis, Color changes, Lead, Positive ions, visual_art, visual_art.visual_art_medium, Fluorescent probes, Sensing property, Colorimetry, Naked eye, Colorimetric detection

الوصف: The electrochemical, optical, and metal cation sensing properties of the triazole-tethered ferrocene-anthracene conjugates, C(48)H(40)FeO(2)N(6) (3) and C(52)H(40)FeO(2)N(6) (4), and the ferrocene-pyrene conjugates, C(29)H(25)FeON(3) (5) and C(31)H(25)FeON(3) (6), have been documented. All the compounds 3-6 behave as very selective redox, chromogenic, and "turn-on" fluorescent probes for Pb(2+) ion in an aqueous environment (CH(3)CN/H(2)O, 2/8). The significant changes in their absorption spectra are accompanied by a strong color change from yellow to greenish blue, which allows a prospective use for the "naked eye" detection of Pb(2+) ion over other competitor cations such as Hg(2+) and Cd(2+). These chemosensors present immense brightness and fluorescence enhancement (chelation-enhanced fluorescence = 85 for 3 and 92 for 4) following Pb(2+) coordination within the limit of detection at 2 ppb. Interestingly, their fluorescence, redox, and colorimetric responses are preserved in presence of water, which can be used for the selective colorimetric detection of Pb(2+) ion in aqueous environment over Hg(2+) and Cd(2+) cations. All the compounds have been characterized by (1)H, (13)C NMR spectroscopy and electrospray ionization mass spectrometry (ESI-MS) spectrometric analysis, and the solid-state structures of 5 and 6 have been unequivocally established by X-ray diffraction analysis.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c912ab8f9307862a534f060e69272eeTest
http://hdl.handle.net/11717/14177Test

المؤلفون: Ati, M., Melot, B.C., Rousse, G., Chotard, J.N., Barpanda, P., Tarascon, J.M.

مصطلحات موضوعية: Batteries, Electrochemistry, Fluorosulfates, Lithium, Solid-state structures

الوصف: Transition-metal fluorosulfates are currently under intense investigation for their use as anodes in Li-ion batteries. The substitution of Zn into LiFeSO4F has been found to trigger a transition from the tavorite structure to two separate polymorphs which crystallize in the sillimanite and triplite structures (see picture). These new phases show Fe2+/Fe 3+ redox potentials of 3.6 and 3.9 V versus Li, respectively. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

العلاقة: http://repository.ust.hk/ir/Record/1783.1-58467Test; Angewandte Chemie (International ed.), v. 50, (45), 2011, p. 10574-10577; https://doi.org/10.1002/anie.201104648Test; http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=1433-7851&rft.volume=50&rft.issue=45&rft.date=2011&rft.spage=10574&rft.aulast=Ati&rft.aufirst=M.&rft.atitle=Structural+and+electrochemical+diversity+in+LiFe1-%CE%B4Zn+%CE%B4SO4FTest+solid+solution%3A+A+Fe-Based+3.9+v+positive-electrode+material&rft.title=Angewandte+Chemie+%28International+ed.%29; http://www.scopus.com/record/display.url?eid=2-s2.0-80155125248&origin=inwardTest; http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000297175600012Test

الإتاحة: https://doi.org/10.1002/anie.201104648Test
http://repository.ust.hk/ir/Record/1783.1-58467Test
http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=1433-7851&rft.volume=50&rft.issue=45&rft.date=2011&rft.spage=10574&rft.aulast=Ati&rft.aufirst=M.&rft.atitle=Structural+and+electrochemical+diversity+in+LiFe1-%CE%B4Zn+%CE%B4SO4FTest+solid+solution%3A+A+Fe-Based+3.9+v+positive-electrode+material&rft.title=Angewandte+Chemie+%28International+ed.%29
http://www.scopus.com/record/display.url?eid=2-s2.0-80155125248&origin=inwardTest
http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000297175600012Test

المؤلفون: Lalia-Kantouri, M., Papadopoulos, C. D., Hatzidimitriou, A. C., Bakas, T., Pachini, S.

مصطلحات موضوعية: iron, solid-state structures, magnetic properties, electrochemistry, mossbauer spectroscopy, molecular-structures, addition-compounds, crystal, salicylaldehydes, mossbauer, clusters, exchange, behavior, fe

الوصف: A trinuclear iron(III) oxo-centered complex [Fe(3)(mu(3)-O)(3-OCH(3)-salnec)(3)]OH center dot 5H(2)O was synthesized and characterized as cluster containing the semi-cubane [Fe(3)(mu(3)-O)](7+) core. The central oxygen atom is bridging the three iron(111) ions, which form an equilateral triangle with an average edge of -3.00 angstrom as it was deduced from X-ray diffraction studies. The new tetradentate ligand 3-OCH(3)-salnecH(2) = 1-[1-hydroxy-2(9'-methyl-1,10'-phenanthrolin-2-yl)ethyl]-3-methoxyphenol-2, was generated "in situ" during the synthesis process as a product of the addition reaction between the starting ligands 2,9-dimethyl-phenanthroline(neoc) and 3-methoxy-salicylaldehyde(3-OCH(3)-saloH(2)), in the presence of sodium methoxide and Fe(3+). Variable-temperature magnetic measurements indicate antiferromagnetic exchange interactions between the iron(III) ions in the cluster. Additionally, spectroscopic (IR, UV/Vis, Mossbauer, EPR) and electrochemical studies (CV) are presented and discussed. ; Zeitschrift Fur Anorganische Und Allgemeine Chemie

العلاقة: http://olympias.lib.uoi.gr/jspui/handle/123456789/16735Test

الإتاحة: http://olympias.lib.uoi.gr/jspui/handle/123456789/16735Test