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Bednarska-Szczepaniak K, Hałagan K, Szwed M, Przelazły E, Leśnikowski ZJ. Quantum Chemical and Biological Insights into Redox Activity of Metallacarborane Complexes in Cancer Cells. J Chem Inf Model 2024; 64:6521-6541. [PMID: 39140958 DOI: 10.1021/acs.jcim.4c00394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
A relationship between the electronic properties of metal ions in metallacarboranes and their ability to modulate mitochondrial oxidase activity and membrane hyperpolarization in cancer cells was demonstrated. Quantum chemistry methods, including DFT and molecular dynamics simulations, were used to understand the oxidized and reduced forms of metallacarboranes and their intramolecular rotatory behavior. According to the low-spin assumption for metal ions, the intramolecular oscillations of cluster ligands in metallacarboranes are significantly influenced by the type of metal and correspond to the cellular uptake of these complexes in vitro. In particular, the low-spin iron compound may be a new xenogeneic booster of redox homeostasis in cancer cells resistant to cisplatin, which induces metabolic 'exhaustion' of cancer cells and their death.
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Affiliation(s)
- Katarzyna Bednarska-Szczepaniak
- Laboratory of Medicinal Chemistry, Polish Academy of Sciences, Institute of Medical Biology, 106 Lodowa, 92-232 Lodz, Poland
| | - Krzysztof Hałagan
- Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland
| | - Marzena Szwed
- Department of Medical Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Institute of Biophysics, Pomorska 141/143, 90-236 Lodz, Poland
| | - Ewelina Przelazły
- Laboratory of Medicinal Chemistry, Polish Academy of Sciences, Institute of Medical Biology, 106 Lodowa, 92-232 Lodz, Poland
| | - Zbigniew J Leśnikowski
- Laboratory of Medicinal Chemistry, Polish Academy of Sciences, Institute of Medical Biology, 106 Lodowa, 92-232 Lodz, Poland
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2
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Sivaev IB. Bis(Dicarbollide) Complexes of Transition Metals: How Substituents in Dicarbollide Ligands Affect the Geometry and Properties of the Complexes. Molecules 2024; 29:3510. [PMID: 39124915 PMCID: PMC11314212 DOI: 10.3390/molecules29153510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2024] [Revised: 07/23/2024] [Accepted: 07/23/2024] [Indexed: 08/12/2024] Open
Abstract
The interaction between different types of substituents in dicarbollide ligands and their influence on the stabilization of various rotational conformers (rotamers) of transition metal bis(dicarbollide) complexes [3,3'-M(1,2-C2B9H11)2]- are considered. It has been shown that the formation of intramolecular CH···X hydrogen bonds between dicarbollide ligands is determined by the size of the proton acceptor atom X rather than its electronegativity. Due to the stabilization of rotamers with different dipole moments, intramolecular hydrogen bonds between ligands in transition metal bis(dicarbollide) complexes can have a significant impact on the biological properties of their derivatives. In the presence of external complexing metals, weak intramolecular CH···X hydrogen bonds can be broken to form stronger X->M donor-acceptor bonds. This process is accompanied by the mutual rotation of dicarbollide ligands and can be used in sensors and molecular switches based on transition metal bis(dicarbollide) complexes.
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Affiliation(s)
- Igor B Sivaev
- A. N. Nesmeyanov Institute of Organoelement Compounds, 28 Vavilov Str., Moscow 119991, Russia
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3
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Stogniy MY, Anufriev SA, Bogdanova EV, Gorodetskaya NA, Anisimov AA, Suponitsky KY, Grishin ID, Sivaev IB. Charge-compensated nido-carborane derivatives in the synthesis of iron(II) bis(dicarbollide) complexes. Dalton Trans 2024. [PMID: 38264799 DOI: 10.1039/d3dt03549b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
A series of stable iron(II) bis(dicarbollide) derivatives [8,8'-(RNHC(Et)HN)2-3,3'-Fe(1,2-C2B9H10)2] (R = Pr, R = Ph, (CH2)2OH, (CH2)3OH, (CH2)2NMe2) was prepared starting from FeCl2 or [FeCl2(dppe)] and the corresponding nido-carboranyl amidines [10-RNHC(Et)HN-7,8-C2B9H11]. In a similar way, the reactions of the oxonium derivatives of nido-carborane with FeCl2 in tetrahydrofuran in the presence of t-BuOK lead to the corresponding stable oxonium derivatives iron(II) bis(dicarbollide) [8,8'-(RR'O)2-3,3'-Fe(1,2-C2B9H10)2] (RR' = (CH2)4, (CH2)2O(CH2)2, (CH2)5; R = R' = Et), which can be alternatively prepared by the reaction of the parent iron(II) bis(dicarbollide) with tetrahydrofuran or 1,4-dioxane in the presence of Me2SO4. The cyclic voltammetry studies of the synthesized iron(II) bis(dicarbollide) derivatives revealed that the introduction of amidinium and oxonium substituents leads to a significant increase in the Fe2+/Fe3+ redox potential relative to the parent iron(II) bis(dicarbollide). The redox potentials of the oxonium derivatives are close to the redox potential of ferrocene and somewhat lower than redox potentials of sulfonium and phosphonium derivatives of iron(II) bis(dicarbollide).
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Affiliation(s)
- Marina Yu Stogniy
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA - Russian Technological University, Moscow, Russia
| | - Sergey A Anufriev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
| | - Ekaterina V Bogdanova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA - Russian Technological University, Moscow, Russia
| | - Nadezhda A Gorodetskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA - Russian Technological University, Moscow, Russia
| | - Alexei A Anisimov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
| | - Kyrill Yu Suponitsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
- G.V. Plekhanov Russian University of Economics, Moscow, Russia
| | - Ivan D Grishin
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia
| | - Igor B Sivaev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia.
- Faculty of Chemistry, National Research University Higher School of Economics (HSE University), Moscow, Russia
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4
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A Simple Way to Obtain a Decachloro Derivative of Cobalt Bis(dicarbollide). REACTIONS 2023. [DOI: 10.3390/reactions4010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
A simple synthetic way to obtain a decachloro derivative of cobalt bis(dicarbollide) has been found. The reaction of cesium salt of cobalt bis(dicarbollide) anion with aluminum chloride in chloroform under reflux conditions results in Cs[3,3′-Co(4,7,8,9,12-Cl5-1,2-C2B9H6)2] of high purity and good yield.
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Fojt L, Grüner B, Nekvinda J, Tűzűn EZ, Havran L, Fojta M. Electrochemistry of Cobalta Bis(dicarbollide) Ions Substituted at Carbon Atoms with Hydrophilic Alkylhydroxy and Carboxy Groups. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061761. [PMID: 35335124 PMCID: PMC8953506 DOI: 10.3390/molecules27061761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/04/2022] [Accepted: 03/06/2022] [Indexed: 11/16/2022]
Abstract
In this study we explore the effect on the electrochemical signals in aqueous buffers of the presence of hydrophilic alkylhydroxy and carboxy groups on the carbon atoms of cobalta bis(dicarbollide) ions. The oxygen-containing exo-skeletal substituents of cobalta bis(dicarbollide) ions belong to the perspective building blocks that are considered for bioconjugation. Carbon substitution provides wider versatility and applicability in terms of the flexibility of possible chemical pathways. However, until recently, the electrochemistry of compounds substituted only on boron atoms could be studied, due to the unavailability of carbon-substituted congeners. In the present study, electrochemistry in aqueous phosphate buffers is considered along with the dependence of electrochemical response on pH and concentration. The compounds used show electrochemical signals around −1.3 and +1.1 V of similar or slightly higher intensities than in the parent cobalta bis(dicarbollide) ion. The signals at positive electrochemical potential correspond to irreversible oxidation of the boron cage (the C2B9 building block) and at negative potential correspond to the reversible redox process of (CoIII/CoII) at the central atom. Although the first signal is typically sharp and its potential can be altered by a number of substituents, the second signal is complex and is composed of three overlapping peaks. This signal shows sigmoidal character at higher concentrations and may be used as a diagnostic tool for aggregation in solution. Surprisingly enough, the observed effects of the site of substitution (boron or carbon) and between individual groups on the electrochemical response were insignificant. Therefore, the substitutions would preserve promising properties of the parent cage for redox labelling, but would not allow for the further tuning of signal position in the electrochemical window.
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Affiliation(s)
- Lukáš Fojt
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
- Correspondence:
| | - Bohumír Grüner
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Jan Nekvinda
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Ece Zeynep Tűzűn
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Luděk Havran
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
| | - Miroslav Fojta
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
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6
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Buades AB, Viñas C, Fontrodona X, Teixidor F. 1.3 V Inorganic Sequential Redox Chain with an All-Anionic Couple 1-/2- in a Single Framework. Inorg Chem 2021; 60:16168-16177. [PMID: 34693711 PMCID: PMC9180739 DOI: 10.1021/acs.inorgchem.1c01822] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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The relatively low symmetry of [3,3′-Co(1,2-C2B9H11)2]− ([1]−), along with the high number
of available
substitution sites, 18 on the boron atoms and 4 on the carbon atoms,
allows a fairly regioselective and stepwise chlorination of the platform
and therefore a very controlled tuning of the electrochemical potential
tuning. This is not so easily found in other systems, e.g., ferrocene.
In this work, we show how a single platform with boron and carbon
in the ligand, and only cobalt can produce a tuning of potentials
in a stepwise manner in the 1.3 V range. The platform used is made
of two icosahedra sharing one vertex. The E1/2 tuning has been achieved from [1]− by sequential chlorination, which has given potentials whose values
increase sequentially and linearly with the number of chloro groups
in the platform. [Cl8-1]−, [Cl10-1]−, and [Cl12-1]− have been obtained, which
are added to the existing [Cl-1]−,
[Cl2-1]−, [Cl4-1]−, and [Cl6-1]− described earlier to give the 1.3 V range. It is envisaged
to extend this range also sequentially by changing the metal from
cobalt to iron. The last successful synthesis of the highest chlorinated
derivatives of cobaltabis(dicarbollide) dates back to 1982, and since
then, no more advances have occurred toward more substituted metallacarborane
chlorinated compounds. [Cl8-1]−, [Cl10-1]−, and [Cl12-1]− are made
with an easy and fast method. The key point of the reaction is the
use of the protonated form of [Co(C2B9H11)2]−, as a starting material,
and the use of sulfuryl chloride, a less hazardous and easier to use
chlorinating agent. In addition, we present a complete, spectroscopic,
crystallographic, and electrochemical characterization, together with
a study of the influence of the chlorination position in the electrochemical
properties. By sequential halogenation of [Co(C2B9H11)2]− ([1]−) with chlorine, the [Cl8-1]−, [Cl10-1]−, and [Cl12-1]− derivatives
of [1]− have been prepared and isolated.
The E1/2 values increase sequentially
and linearly with the number of chloro groups in the platform. If
these potentials are added to the existing E1/2 values due to [Cl-1]−, [Cl2-1]−, [Cl4-1]−, and [Cl6-1]− described earlier, a 1.3 V range is obtained. This
allows tuning of the desired potentials for the purposes of nature.
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Affiliation(s)
- Ana B Buades
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autonòma de Barcelona (UAB), 08193 Bellaterra, Spain
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autonòma de Barcelona (UAB), 08193 Bellaterra, Spain
| | - Xavier Fontrodona
- Departamento de Química and Serveis Tècnics de Recerca, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain
| | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autonòma de Barcelona (UAB), 08193 Bellaterra, Spain
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7
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Konoplev VE, Dolgushin FM, Loginov DA, Tachaev MV. Step-by-step polyhedral contraction of the osmacarborane framework {OsCB10} → {OsCB9} → {OsCB8}. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Olvera-Mancilla J, Escorihuela J, Alexandrova L, Andrio A, García-Bernabé A, Del Castillo LF, Compañ V. Effect of metallacarborane salt H[COSANE] doping on the performance properties of polybenzimidazole membranes for high temperature PEMFCs. SOFT MATTER 2020; 16:7624-7635. [PMID: 32735001 DOI: 10.1039/d0sm00743a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this paper, a series of composite proton exchange membranes comprising a cobaltacarborane protonated H[Co(C2B9H11)2] named (H[COSANE]) and polybenzimidazole (PBI) for a high temperature proton exchange membrane fuel cell (PEMFC) is reported, with the aim of enhancing the proton conductivity of PBI membranes doped with phosphoric acid. The effects of the anion [Co(C2B9H11)2] concentration in three different polymeric matrices based on the PBI structure, poly(2,2'-(m-phenylene)-5,5'-bibenzimidazole) (PBI-1), poly[2,2'-(p-oxydiphenylene)-5,5'-bibenzimidazole] (PBI-2) and poly(2,2'-(p-hexafluoroisopropylidene)-5,5'-bibenzimidazole) (PBI-3), have been investigated. The conductivity, diffusivity and mobility are greater in the composite membrane poly(2,2'-(p-hexafluoroisopropylidene)-5,5'-bibenzimidazole) containing fluorinated groups, reaching a maximum when the amount of H[COSANE] was 15%. In general, all the prepared membranes displayed excellent and tunable properties as conducting materials, with conductivities higher than 0.03 S cm-1 above 140 °C. From an analysis of electrode polarization (EP) the proton diffusion coefficients and mobility have been calculated.
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Affiliation(s)
- Jessica Olvera-Mancilla
- Departamento de polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Apartado Postal 70-360, Coyoacán, Ciudad de México, 04510, Mexico
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Av. Vicente Andrés Estellés s/n, Burjassot 46100, Valencia, Spain.
| | - Larissa Alexandrova
- Departamento de polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Apartado Postal 70-360, Coyoacán, Ciudad de México, 04510, Mexico
| | - Andreu Andrio
- Departament de Física Aplicada, Universitat Jaume I, 12080, Castelló, Spain
| | - Abel García-Bernabé
- Departamento de Termodinámica Aplicada (ETSII), Universitat Politècnica de Valencia, Campus de Vera s/n, 46022 Valencia, Spain.
| | - Luis Felipe Del Castillo
- Departamento de polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Apartado Postal 70-360, Coyoacán, Ciudad de México, 04510, Mexico
| | - Vicente Compañ
- Departamento de Termodinámica Aplicada (ETSII), Universitat Politècnica de Valencia, Campus de Vera s/n, 46022 Valencia, Spain.
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9
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Fojt L, Grüner B, Šícha V, Nekvinda J, Vespalec R, Fojta M. Electrochemistry of icosahedral cobalt bis(dicarbollide) ions and their carbon and boron substituted derivatives in aqueous phosphate buffers. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Guerrero I, Kelemen Z, Viñas C, Romero I, Teixidor F. Metallacarboranes as Photoredox Catalysts in Water. Chemistry 2020; 26:5027-5036. [PMID: 31999000 DOI: 10.1002/chem.201905395] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/22/2020] [Indexed: 12/18/2022]
Abstract
Metallacarboranes with the shape of the Greek letter θ, such as [Co(C2 B9 H11 )2 ]- , were tested, for the first time, as efficient photoredox catalysts in the oxidation of aromatic and aliphatic alcohols in water. Their efficiency is linked to their high solubility in water, their high oxidizing power (Co4+/3+ ), and their absence of fluorescence on excitation, among others. In most of the studied examples, using a catalyst load of 0.4 mol % gave high yields of 90-95 % with selectivity greater than 99 %. By reducing the catalyst load to 0.01 mol %, quantitative conversion of reactants to products was achieved, in some cases with greater than 99 % yield, high catalyst efficiency reaching a turnover number of 10 000, and a higher yield with a 45 times lower concentration of catalyst. The metallacarboranes can be recovered easily by precipitation on addition of [NMe4 ]Cl. A pathway for the photoredox-catalyzed oxidation of alcohols is proposed.
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Affiliation(s)
- Isabel Guerrero
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain.,Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/ M. Aurèlia Campmany, 69, 17003, Girona, Spain
| | - Zsolt Kelemen
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - Clara Viñas
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/ M. Aurèlia Campmany, 69, 17003, Girona, Spain
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193, Bellaterra, Spain
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11
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Buades AB, Kelemen Z, Arderiu VS, Zaulet A, Viñas C, Teixidor F. A fast and simple B-C bond formation in metallacarboranes avoiding halometallacarboranes and transition metal catalysts. Dalton Trans 2020; 49:3525-3531. [PMID: 32108183 DOI: 10.1039/c9dt04695j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An electrophilic substitution on metallacarboranes by using a stabilized carbocation that can be made in situ is reported for the first time. This new synthetic methodology provides a new perspective on easy metallacarborane derivatization with organic fragments, which enhances the properties of both fragments and widens their possible applications.
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Affiliation(s)
- Ana B Buades
- Institut de Ciència de Materials de Barcelona - CSIC, Campus UAB, 08193, Bellaterra, Barcelona, Spain.
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12
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13
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Fuentes I, Andrio A, García-Bernabé A, Escorihuela J, Viñas C, Teixidor F, Compañ V. Structural and dielectric properties of cobaltacarborane composite polybenzimidazole membranes as solid polymer electrolytes at high temperature. Phys Chem Chem Phys 2018; 20:10173-10184. [PMID: 29594295 DOI: 10.1039/c8cp00372f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conductivity of a series of composite membranes, based on polybenzimidazole (PBI) containing the metallacarborane salt M[Co(C2B9H11)2], M[COSANE] and tetraphenylborate, M[B(C6H5)4], M[TPB] both anions having the same number of atoms and the same negative charge, has been investigated. Different cations (M = H+, Li+ and Na+) have been studied and the composite membranes have been characterized by water uptake, swelling ratios, ATR FT-IR, thermogravimetric analysis and electrochemical impedance spectroscopy to explore the dielectric response and ion dynamics in composite membranes. Our results show that conductivity increases with increasing temperature and it is higher for H+ than for Li+ and Na+ for all temperatures under study. The mobility of Li+ is greater in [COSANE]- than in [TPB]- composite PBI@membranes while for Na+ it is the opposite. The temperature dependence of the conductivity of the composite was followed by a typical Arrhenius behaviour with two different regions: (1) between 20 and 100 °C, and (2) between 100 and 150 °C. Using the analysis of electrode polarization (EP) based on the Thrukhan theory we have calculated the ionic diffusion coefficients and the density of carriers. From the double logarithmic plot of the imaginary part of the conductivity (σ'') versus frequency in the entire range of temperatures studied we have determined for each sample at each temperature, the frequency values of the onset (fON) and full development of electrode polarization (fMAX), respectively, which permit us to calculate static permittivity.
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Affiliation(s)
- Isabel Fuentes
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
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14
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Buades AB, Sanchez Arderiu V, Olid-Britos D, Viñas C, Sillanpää R, Haukka M, Fontrodona X, Paradinas M, Ocal C, Teixidor F. Electron Accumulative Molecules. J Am Chem Soc 2018; 140:2957-2970. [PMID: 29397708 DOI: 10.1021/jacs.7b12815] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the goal to produce molecules with high electron accepting capacity and low reorganization energy upon gaining one or more electrons, a synthesis procedure leading to the formation of a B-N(aromatic) bond in a cluster has been developed. The research was focused on the development of a molecular structure able to accept and release a specific number of electrons without decomposing or change in its structural arrangement. The synthetic procedure consists of a parallel decomposition reaction to generate a reactive electrophile and a synthesis reaction to generate the B-N(aromatic) bond. This procedure has paved the way to produce the metallacarboranylviologen [M(C2B9H11)(C2B9H10)-NC5H4-C5H4N-M'(C2B9H11)(C2B9H10)] (M = M' = Co, Fe and M = Co and M' = Fe) and semi(metallacarboranyl)viologen [3,3'-M(8-(NC5H4-C5H4N-1,2-C2B9H10)(1',2'-C2B9H11)] (M = Co, Fe) electron cumulative molecules. These molecules are able to accept up to five electrons and to donate one in single electron steps at accessible potentials and in a reversible way. By targeted synthesis and corresponding electrochemical tests each electron transfer (ET) step has been assigned to specific fragments of the molecules. The molecules have been carefully characterized, and the electronic communication between both metal centers (when this situation applies) has been definitely observed through the coplanarity of both pyridine fragments. The structural characteristics of these molecules imply a low reorganization energy that is a necessary requirement for low energy ET processes. This makes them electronically comparable to fullerenes, but on their side, they have a wide range of possible solvents. The ET from one molecule to another has been clearly demonstrated as well as their self-organizing capacity. We consider that these molecules, thanks to their easy synthesis, ET, self-organizing capacity, wide range of solubility, and easy processability, can find important application in any area where ET is paramount.
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Affiliation(s)
- Ana B Buades
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Víctor Sanchez Arderiu
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - David Olid-Britos
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Reijo Sillanpää
- Dept. of Chemistry, University of Jyväskylä , FIN-40014 Jyvaskyla, Finland
| | - Matti Haukka
- Dept. of Chemistry, University of Jyväskylä , FIN-40014 Jyvaskyla, Finland
| | - Xavier Fontrodona
- Dept. de Química and Serveis Tècnics de Recerca, Universitat de Girona , Campus de Montilivi, E-17071 Girona, Spain
| | - Markos Paradinas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Carmen Ocal
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, Bellaterra, 08193 Barcelona, Spain
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16
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Fuentes I, Andrio A, Teixidor F, Viñas C, Compañ V. Enhanced conductivity of sodium versus lithium salts measured by impedance spectroscopy. Sodium cobaltacarboranes as electrolytes of choice. Phys Chem Chem Phys 2017; 19:15177-15186. [DOI: 10.1039/c7cp02526b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Scheme of the proposed mechanism to explain the mobility of the cations through the monomers COSANE and TPB. While in COSANE the mechanism is through jumps (hopping mechanism) in TPB the ionic transport is vehicular.
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Affiliation(s)
- Isabel Fuentes
- Institut de Ciència de Materials de Barcelona
- 08193 Bellaterra
- Spain
| | - Andreu Andrio
- Departamento de Física aplicada
- Universitat Jaume I
- 12080 Castellón
- Spain
| | | | - Clara Viñas
- Institut de Ciència de Materials de Barcelona
- 08193 Bellaterra
- Spain
| | - Vicente Compañ
- Escuela Técnica Superior de Ingenieros Industriales
- Departamento de Termodinámica Aplicada
- Universidad Politécnica de Valencia
- 46020 Valencia
- Spain
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17
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Núñez R, Tarrés M, Ferrer-Ugalde A, de Biani FF, Teixidor F. Electrochemistry and Photoluminescence of Icosahedral Carboranes, Boranes, Metallacarboranes, and Their Derivatives. Chem Rev 2016; 116:14307-14378. [DOI: 10.1021/acs.chemrev.6b00198] [Citation(s) in RCA: 325] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rosario Núñez
- Institut de Ciència de Materials
de Barcelona (ICMAB-CSIC), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Màrius Tarrés
- Institut de Ciència de Materials
de Barcelona (ICMAB-CSIC), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Albert Ferrer-Ugalde
- Institut de Ciència de Materials
de Barcelona (ICMAB-CSIC), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Fabrizia Fabrizi de Biani
- Dipartimento
di Biotecnologie, Chimica e Farmacia, Universita degli Studi di Siena, via Aldo Moro, 2, 53100 Siena, Italy
| | - Francesc Teixidor
- Institut de Ciència de Materials
de Barcelona (ICMAB-CSIC), Campus de la Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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18
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García-Mendiola T, Bayon-Pizarro V, Zaulet A, Fuentes I, Pariente F, Teixidor F, Viñas C, Lorenzo E. Metallacarboranes as tunable redox potential electrochemical indicators for screening of gene mutation. Chem Sci 2016; 7:5786-5797. [PMID: 30034717 PMCID: PMC6022041 DOI: 10.1039/c6sc01567k] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 06/08/2016] [Indexed: 12/17/2022] Open
Abstract
The substitution of hydrogen with chlorine in the metallacarborane [3,3-Fe(1,2-closo-C2B9H11)2]- cluster modulates the formal potential of the Fe3+/Fe2+ redox couple, shifting it to a more positive value. Hence, very similar redox probes with a wide range of formal potentials, ranging from negative to positive values, are available. Thus, we have achieved the synthesis and studied the electrochemical behaviour of the sodium salt of [3,3-Fe(8,9,12-Cl3-1,2-closo-C2B9H8)2]- in aqueous media. This strategy allows tuning of the redox potential of the [3,3-Fe(1,2-closo-C2B9H11)2]- framework with a minor change in its shape and dimensions. We also describe the interaction of the prepared [3,3-Fe(8,9,12-Cl3-1,2-closo-C2B9H8)2]- and the pristine [3,3-Fe(1,2-closo-C2B9H11)2]- with DNA. These studies have been carried out not only with DNA in solution but also with DNA immobilized on screen-printed gold electrodes. The results obtained point to a strong interaction between the metallacarboranes and DNA, to a different extent with single stranded DNA (ssDNA) compared to double stranded DNA (dsDNA). This property makes them selective and wide-ranging potential electrochemical indicators of hybridization. The suitability of these new redox indicators for selective DNA biosensor development has been probed by the direct detection of two different mutations associated with cystic fibrosis in PCR amplicons extracted from blood cells.
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Affiliation(s)
- Tania García-Mendiola
- Departamento Química Analítica y Análisis Instrumental , Universidad Autónoma de Madrid , Spain .
- Instituto Madrileño de Estudios Avanzados (IMDEA) Nanociencia , Spain
| | - Victoria Bayon-Pizarro
- Departamento Química Analítica y Análisis Instrumental , Universidad Autónoma de Madrid , Spain .
| | - Adnana Zaulet
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, 08193 Bellaterra , Barcelona , Spain .
| | - Isabel Fuentes
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, 08193 Bellaterra , Barcelona , Spain .
| | - Félix Pariente
- Departamento Química Analítica y Análisis Instrumental , Universidad Autónoma de Madrid , Spain .
- Instituto Madrileño de Estudios Avanzados (IMDEA) Nanociencia , Spain
| | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, 08193 Bellaterra , Barcelona , Spain .
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB, 08193 Bellaterra , Barcelona , Spain .
| | - Encarnación Lorenzo
- Departamento Química Analítica y Análisis Instrumental , Universidad Autónoma de Madrid , Spain .
- Instituto Madrileño de Estudios Avanzados (IMDEA) Nanociencia , Spain
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19
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Skipping the one C–X one C–C bond rule in Kumada cross coupling reaction. Diarylation from an only B–I in metallacarboranes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Lupu M, Zaulet A, Teixidor F, Ruiz E, Viñas C. Negatively Charged Metallacarborane Redox Couples with Both Members Stable to Air. Chemistry 2015; 21:6888-97. [DOI: 10.1002/chem.201406244] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Indexed: 11/11/2022]
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21
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Tarrés M, Arderiu VS, Zaulet A, Viñas C, Fabrizi de Biani F, Teixidor F. How to get the desired reduction voltage in a single framework! Metallacarborane as an optimal probe for sequential voltage tuning. Dalton Trans 2015; 44:11690-5. [DOI: 10.1039/c5dt01464f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A single platform, [M(C2B9H11)2]− (M = Co, Fe) offers the possibility to choose the desired potential in a 1.4 V range without changing shape or volume of the platform. Methyl viologen was used as benchmark for E1/2 tuning.
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Affiliation(s)
- Màrius Tarrés
- Institut de Ciencia de Materials de Barcelona
- ICMAB-CSIC
- E-08193 Bellaterra
- Spain
| | - Víctor S. Arderiu
- Institut de Ciencia de Materials de Barcelona
- ICMAB-CSIC
- E-08193 Bellaterra
- Spain
| | - Adnana Zaulet
- Institut de Ciencia de Materials de Barcelona
- ICMAB-CSIC
- E-08193 Bellaterra
- Spain
| | - Clara Viñas
- Institut de Ciencia de Materials de Barcelona
- ICMAB-CSIC
- E-08193 Bellaterra
- Spain
| | | | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona
- ICMAB-CSIC
- E-08193 Bellaterra
- Spain
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Tarrés M, Viñas C, Cioran AM, Hänninen MM, Sillanpää R, Teixidor F. Towards Multifunctional Materials Incorporating Elastomers and Reversible Redox-Active Fragments. Chemistry 2014; 20:15808-15. [DOI: 10.1002/chem.201403424] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/10/2014] [Indexed: 11/11/2022]
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23
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Farràs P, Musteti AD, Rojo I, Viñas C, Teixidor F, Light ME. Widely Applicable Metallacarborane Reagents for π-Conjugated Systems. Inorg Chem 2014; 53:5803-9. [DOI: 10.1021/ic500615k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pau Farràs
- Institut
de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., E-08193 Bellaterra, Barcelona, Spain
| | - Ana D. Musteti
- Institut
de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., E-08193 Bellaterra, Barcelona, Spain
| | - Isabel Rojo
- Institut
de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., E-08193 Bellaterra, Barcelona, Spain
| | - Clara Viñas
- Institut
de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., E-08193 Bellaterra, Barcelona, Spain
| | - Francesc Teixidor
- Institut
de Ciència de Materials de Barcelona (CSIC), Campus de la U.A.B., E-08193 Bellaterra, Barcelona, Spain
| | - Mark E. Light
- Chemistry, University of Southampton, SouthamptonSO17 1BJ, United Kingdom
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24
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Tarrés M, Viñas C, González-Cardoso P, Hänninen MM, Sillanpää R, Ďorďovič V, Uchman M, Teixidor F, Matějíček P. Aqueous Self-Assembly and Cation Selectivity of Cobaltabisdicarbollide Dianionic Dumbbells. Chemistry 2014; 20:6786-94. [DOI: 10.1002/chem.201402193] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Indexed: 01/09/2023]
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25
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Graham SS, Jelliss PA. Brominated ferracarboranes as diffuse redox mediators for glucose oxidase bioanodes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Grabowska I, Stachyra A, Góra-Sochacka A, Sirko A, Olejniczak AB, Leśnikowski ZJ, Radecki J, Radecka H. DNA probe modified with 3-iron bis(dicarbollide) for electrochemical determination of DNA sequence of Avian Influenza Virus H5N1. Biosens Bioelectron 2014; 51:170-6. [DOI: 10.1016/j.bios.2013.07.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 07/01/2013] [Accepted: 07/11/2013] [Indexed: 10/26/2022]
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27
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Viñas C, Tarrés M, González-Cardoso P, Farràs P, Bauduin P, Teixidor F. Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water. Dalton Trans 2014; 43:5062-8. [DOI: 10.1039/c3dt52825a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Farràs P, Viñas C, Teixidor F. Preferential chlorination vertices in cobaltabisdicarbollide anions. Substitution rate correlation with site charges computed by the two atoms natural population analysis method (2a-NPA). J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.03.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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29
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Wang H, Liu X. Intramolecular hydrogen bonding interaction, a mechanism for the bridging linkages to exert electronic influence on diiron models of [FeFe]-hydrogenase. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Haines DE, O’Hanlon DC, Manna J, Jones MK, Shaner SE, Sun J, Hopkins MD. Oxidation-Potential Tuning of Tungsten–Alkylidyne Complexes over a 2 V Range. Inorg Chem 2013; 52:9650-8. [DOI: 10.1021/ic401450u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Daniel E. Haines
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Daniel C. O’Hanlon
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Joseph Manna
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Marya K. Jones
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Sarah E. Shaner
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Jibin Sun
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
| | - Michael D. Hopkins
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637,
United States
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31
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Spokoyny AM. New ligand platforms featuring boron-rich clusters as organomimetic substituents .. PURE APPL CHEM 2013; 85:10.1351/PAC-CON-13-01-13. [PMID: 24311823 PMCID: PMC3845684 DOI: 10.1351/pac-con-13-01-13] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
200 years of research with carbon-rich molecules have shaped the development of modern chemistry. Research pertaining to the chemistry of boron-rich species has historically trailed behind its more distinguished neighbor (carbon) in the periodic table. Notably, a potentially rich and, in many cases, unmatched field of coordination chemistry using boronrich clusters remains fundamentally underdeveloped. Our work has been devoted to examining several basic concepts related to the functionalization of icosahedral boron-rich clusters and their use as ligands, aimed at designing fundamentally new hybrid molecular motifs and materials. Particularly interesting are icosahedral carboranes, which can be regarded as 3D analogs of benzene. These species comprise a class of boron-rich clusters that were discovered in the 1950s during the "space race" while researchers were developing energetic materials for rocket fuels. Ultimately, the unique chemical and physical properties of carborane species, such as rigidity, indefinite stability to air and moisture, and 3D aromaticity, may allow one to access a set of properties not normally available in carbon-based chemistry. While technically these species are considered as inorganic clusters, the chemical properties they possess make these boron-rich species suitable for replacing and/or altering structural and functional features of the organic and organometallic molecules-a phenomenon best described as "organomimetic". Aside from purely fundamental features associated with the organomimetic chemistry of icosahedral carboranes, their use can also provide new avenues in the development of systems relevant to solving current problems associated with energy production, storage, and conversion.
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32
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Electrochemical detection of DNA hybridization using metallacarborane unit. Bioelectrochemistry 2012; 87:78-83. [DOI: 10.1016/j.bioelechem.2011.10.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 08/26/2011] [Accepted: 10/28/2011] [Indexed: 11/17/2022]
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33
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Olid D, Viñas C, Teixidor F. Li+-Mediated BC Cross-Coupling. Chemistry 2012; 18:12936-40. [DOI: 10.1002/chem.201201881] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Indexed: 11/06/2022]
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34
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Farràs P, Vankova N, Zeonjuk LL, Warneke J, Dülcks T, Heine T, Viñas C, Teixidor F, Gabel D. From an Icosahedron to a Plane: Flattening Dodecaiodo-dodecaborate by Successive Stripping of Iodine. Chemistry 2012; 18:13208-12. [DOI: 10.1002/chem.201200828] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 06/15/2012] [Indexed: 11/09/2022]
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35
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Farràs P, Juárez-Pérez EJ, Lepšík M, Luque R, Núñez R, Teixidor F. Metallacarboranes and their interactions: theoretical insights and their applicability. Chem Soc Rev 2012; 41:3445-63. [DOI: 10.1039/c2cs15338f] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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36
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Lakshmi V, Ravikanth M. Brominated boron dipyrrins: synthesis, structure, spectral and electrochemical properties. Dalton Trans 2012; 41:5903-11. [DOI: 10.1039/c2dt00019a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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37
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Pepiol A, Teixidor F, Sillanpää R, Lupu M, Viñas C. Stepwise Sequential Redox Potential Modulation Possible on a Single Platform. Angew Chem Int Ed Engl 2011; 50:12491-5. [DOI: 10.1002/anie.201105668] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Indexed: 11/07/2022]
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38
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Pepiol A, Teixidor F, Sillanpää R, Lupu M, Viñas C. Stepwise Sequential Redox Potential Modulation Possible on a Single Platform. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105668] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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Farràs P, Teixidor F, Rojo I, Kivekäs R, Sillanpää R, González-Cardoso P, Viñas C. Relaxed but highly compact diansa metallacyclophanes. J Am Chem Soc 2011; 133:16537-52. [PMID: 21905695 DOI: 10.1021/ja205850p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of monoansa [μ-1,1'-PR-3,3'-Co(1,2-C(2)B(9)H(10))(2)](-) and diansa [8,8'-μ-(1'',2''-benzene)-μ-1,1'-PR-3,3'-Co(1,2-C(2)B(9)H(9))(2)](-) (R = Ph, (t)Bu) cobaltabisdicarbollidephanes have been synthesized, characterized and studied by NMR, MALDI-TOF-MS, UV-visible spectroscopy, cyclic voltammetry, and DFT calculations. Single crystal X-ray diffraction revealed a highly relaxed structure characterized by the title angle α of 3.8° ([7](-)), this being the smallest angle α for a metallacyclophane. In such compounds, the metal-to-phosphorus distance is less than the sum of their van der Waals radii. The availability of a phosphorus lone pair causes an electron delocalization through the metal, as shown by the abnormal (31)P NMR chemical shift. Remarkably, the combination of a phosphine donor and a phenyl acceptor moieties causes a synergistic effect that is observed through the different techniques used in this study. The importance of having an available lone pair is demonstrated by the oxidation of phosphorus with hydrogen peroxide, sulfur, and elemental black selenium to produce the corresponding P(V) compounds. When the electron lone pair is used to form the bond with the corresponding chalcogen atom, the communication between the donor and acceptor moieties on the diansa metallacyclophane is shut down.
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Affiliation(s)
- Pau Farràs
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la U.A.B., E-08193 Bellaterra, Spain
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40
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Núñez R, Juárez-Pérez EJ, Teixidor F, Santillan R, Farfán N, Abreu A, Yépez R, Viñas C. Decorating Poly(alkyl aryl-ether) Dendrimers with Metallacarboranes. Inorg Chem 2010; 49:9993-10000. [DOI: 10.1021/ic101306w] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rosario Núñez
- Institut de Ciència de Materials de Barcelona, CSIC, Campus U.A.B., 08193 Bellaterra, Spain
| | | | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona, CSIC, Campus U.A.B., 08193 Bellaterra, Spain
| | - Rosa Santillan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, 07000, Apdo. Postal 14-740, México D. F., México
| | - Norberto Farfán
- Facultad de Química, Departamento de Química Orgánica, Universidad Nacional Autónoma de México, México D.F. 04510, México
| | - Arturo Abreu
- Universidad Politécnica de Pachuca, Carretera Pachuca Cd. Sahagún, Km 20, Zempoala, Hidalgo, México
| | - Rebeca Yépez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del IPN, 07000, Apdo. Postal 14-740, México D. F., México
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona, CSIC, Campus U.A.B., 08193 Bellaterra, Spain
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41
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Franken A, McGrath TD, Stone FGA. Two Metal−Monocarbollide Relatives of the {B20H18} Double-Cluster Boranes. Organometallics 2010. [DOI: 10.1021/om100471n] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Franken
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - Thomas D. McGrath
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
| | - F. Gordon A. Stone
- Department of Chemistry & Biochemistry, Baylor University, Waco, Texas 76798-7348
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42
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Farràs P, Viñas C, Sillanpää R, Teixidor F, Rey M. The nature of the chlorination reaction in [1-C6H5-1-CB9H9]− boron clusters. Dalton Trans 2010; 39:7684-91. [DOI: 10.1039/c0dt00433b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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