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Michalczyk M, Zierkiewicz W, Scheiner S. Wolfium bonds in homodimers of MX 4Y (M = Mo, W; X = F, Cl, Br; Y = O, S, Se). Phys Chem Chem Phys 2024; 26:5836-5847. [PMID: 38299423 DOI: 10.1039/d3cp05867k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
The term "wolfium bond" has been recently introduced to describe the noncovalent attraction between an atom of group 6 and a nucleophile via a σ-hole binding site. Crystal structures commonly contain a motif wherein two MX4Y units are arranged in close proximity, where M represents either Mo or W, and X and Y refer to halogen and chalcogen atoms respectively. DFT calculations were thus applied to a wide range of homodimers of these molecules so as to assess their preferred arrangements, and to characterize the types of bonding that are present in each in a systematic manner. The most stable Dual-X configuration is symmetric and contains a pair of equivalent M⋯X bonds. The interaction energies range from -8 to -29 kcal mol-1, and are largest for X = F, Y = O, and M = W. The X electron donor is replaced by Y, and the two wolfium bonds are reduced to one, in the less stable Mono-Y structure, with interaction energies between -2 and -10 kcal mol-1. There is some question as to whether the weaker bonds of this type constitute true wolfium bonds.
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Affiliation(s)
- Mariusz Michalczyk
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Wiktor Zierkiewicz
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University Logan, Utah 84322-0300, USA
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2
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Kalanyan B, Maslar JE. Ultraviolet-Visible Absorption Spectroscopy of MoCl 5, MoOCl 4, and MoO 2Cl 2 Vapors. J Phys Chem A 2024; 128:118-128. [PMID: 38153102 DOI: 10.1021/acs.jpca.3c06522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
This article reports quantitative absorption spectra for MoCl5, MoOCl4, and MoO2Cl2 in the vapor phase from 45,500 to 15,500 cm-1 (645 to 220 nm). Spectra are obtained in an ultrahigh purity stainless steel vacuum system by rapidly sampling a range of analyte partial pressures. The short measurement times and the differential absorbance method employed here minimize effects from uncontrolled transients such as window deposits. A detailed analysis of replicate measurements and time-resolved spectra shows generally reproducible spectral response from MoCl5 vapors at 120 °C. The presence of HCl and MoOCl4 impurities in the MoCl5 vapor samples is determined to be unlikely based on the analysis of absorbance-pressure curves and spectral peak fitting. Comparison with MoOCl4 and MoO2Cl2 spectra shows a unique spectral fingerprint for MoCl5 at 28,500 cm-1 providing a convenient means of discriminating between MoCl5 and its oxychlorides in the visible wavelengths. Adsorption behavior of MoCl5 on surfaces is also discussed with particular emphasis on the use of MoCl5 as a reactant in vapor phase thin film deposition processes.
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Affiliation(s)
- Berc Kalanyan
- Material Measurement Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive., Gaithersburg, Maryland 20899, United States
| | - James E Maslar
- Material Measurement Laboratory, National Institute of Standards and Technology (NIST), 100 Bureau Drive., Gaithersburg, Maryland 20899, United States
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3
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Bresciani G, Zacchini S, Pampaloni G, Bortoluzzi M, Marchetti F. Diiron Aminocarbyne Complexes with NCE− Ligands (E = O, S, Se). Molecules 2023; 28:molecules28073251. [PMID: 37050013 PMCID: PMC10096932 DOI: 10.3390/molecules28073251] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/29/2023] [Accepted: 04/01/2023] [Indexed: 04/09/2023] Open
Abstract
Diiron μ-aminocarbyne complexes [Fe2Cp2(NCMe)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Xyl, [1aNCMe]CF3SO3; R = Me, [1bNCMe]CF3SO3; R = Cy, [1cNCMe]CF3SO3; R = CH2Ph, [1dNCMe]CF3SO3), freshly prepared from tricarbonyl precursors [1a–d]CF3SO3, reacted with NaOCN (in acetone) and NBu4SCN (in dichloromethane) to give [Fe2Cp2(kN-NCO)(CO)(μ-CO){μ-CN(Me)(R)}] (R = Xyl, 2a; Me, 2b; Cy, 2c) and [Fe2Cp2(kN-NCS)(CO)(μ-CO){μ-CN(Me)(CH2Ph)}], 3 in 67–81% yields via substitution of the acetonitrile ligand. The reaction of [1aNCMe–1cNCMe]CF3SO3 with KSeCN in THF at reflux temperature led to the cyanide complexes [Fe2Cp2(CN)(CO)(μ-CO){μ-CNMe(R)}], 6a–c (45–67%). When the reaction of [1aNCMe]CF3SO3 with KSeCN was performed in acetone at room temperature, subsequent careful chromatography allowed the separation of moderate amounts of [Fe2Cp2(kSe-SeCN)(CO)(μ-CO){μ-CN(Me)(Xyl)}], 4a, and [Fe2Cp2(kN-NCSe)(CO)(μ-CO){μ-CN(Me)(Xyl)}], 5a. All products were fully characterized by elemental analysis, IR, and multinuclear NMR spectroscopy; moreover, the molecular structure of trans-6b was ascertained by single crystal X-ray diffraction. DFT calculations were carried out to shed light on the coordination mode and stability of the {NCSe-} fragment.
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Affiliation(s)
- Giulio Bresciani
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
- Interuniversity Consortium for Chemical Reactivity and Catalysis, CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Stefano Zacchini
- Interuniversity Consortium for Chemical Reactivity and Catalysis, CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Guido Pampaloni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
- Interuniversity Consortium for Chemical Reactivity and Catalysis, CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Marco Bortoluzzi
- Interuniversity Consortium for Chemical Reactivity and Catalysis, CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy
- Department of Molecular Science and Nanosystems, University of Venezia “Ca’ Foscari”, Via Torino 155, I-30170 Mestre, Italy
| | - Fabio Marchetti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, I-56124 Pisa, Italy
- Interuniversity Consortium for Chemical Reactivity and Catalysis, CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy
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4
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Adding Diversity to Diiron Aminocarbyne Complexes with Amine Ligands. INORGANICS 2023. [DOI: 10.3390/inorganics11030091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The reactions of the diiron aminocarbyne complexes [Fe2Cp2(NCMe)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, 1aNCMe; R = Cy, 1bNCMe), freshly prepared from the tricarbonyl precursors 1a–b, with primary amines containing an additional function (i.e., alcohol or ether) proceeded with the replacement of the labile acetonitrile ligand and formation of [Fe2Cp2(NH2CH2CH2OR’)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, R’ = H, 2a; R = Cy, R’ = H, 2b; R = Cy, R’ = Me, 2c) in 81–95% yields. The diiron-oxazolidinone conjugate [Fe2Cp2(NH2OX)(CO)(μ-CO){μ-CN(Me)2}]CF3SO3, 3, was prepared from 1a, 3-(2-aminoethyl)-5-phenyloxazolidin-2-one (NH2OX) and Me3NO, and finally isolated in 96% yield. In contrast, the one pot reactions of 1a-b with NHEt2 in the presence of Me3NO gave the unstable [Fe2Cp2(NHEt2)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, 4a; R = Cy, 4b) as unclean products. All diiron complexes were characterized by analytical and spectroscopic techniques; moreover, the behavior of 2a–c and 3 in aqueous media was ascertained.
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Campanella B, Braccini S, Bresciani G, De Franco M, Gandin V, Chiellini F, Pratesi A, Pampaloni G, Biancalana L, Marchetti F. The choice of μ-vinyliminium ligand substituents is key to optimize the antiproliferative activity of related diiron complexes. METALLOMICS : INTEGRATED BIOMETAL SCIENCE 2023; 15:6901513. [PMID: 36515681 DOI: 10.1093/mtomcs/mfac096] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
Diiron vinyliminium complexes constitute a large family of organometallics displaying a promising anticancer potential. The complexes [Fe2Cp2(CO)(μ-CO){μ-η1:η3-C(R3)C(R4)CN(R1)(R2)}]CF3SO3 (2a-c, 4a-d) were synthesized, assessed for their behavior in aqueous solutions (D2O solubility, Log Pow, stability in D2O/Me2SO-d6 mixture at 37°C over 48 h) and investigated for their antiproliferative activity against A2780 and A2780cisR ovarian cancer cell lines and the nontumoral one Balb/3T3 clone A31. Cytotoxicity data collected for 50 vinyliminium complexes were correlated with the structural properties (i.e. the different R1-R4 substituents) using the partial least squares methodology. A clear positive correlation emerged between the octanol-water partition coefficient and the relative antiproliferative activity on ovarian cancer cell lines, both of which appear as uncorrelated to the cancer cell selectivity. However, the different effects played by the R1-R4 substituents allow tracing guidelines for the development of novel, more effective compounds. Based on these results, three additional complexes (4p-r) were designed, synthesized and biologically investigated, revealing their ability to hamper thioredoxin reductase enzyme and to induce cancer cell production of reactive oxygen species.
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Affiliation(s)
- Beatrice Campanella
- Istituto di Chimica dei Composti Organometallici, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Simona Braccini
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Giulio Bresciani
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Michele De Franco
- University of Padova, Department of Pharmaceutical and Pharmacological Sciences, Via F. Marzolo 5, I-35131 Padova, Italy
| | - Valentina Gandin
- University of Padova, Department of Pharmaceutical and Pharmacological Sciences, Via F. Marzolo 5, I-35131 Padova, Italy
| | - Federica Chiellini
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Alessandro Pratesi
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Guido Pampaloni
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Lorenzo Biancalana
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
| | - Fabio Marchetti
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
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Fosshat S, Siddhiaratchi SDM, Baumberger CL, Ortiz VR, Fronczek FR, Chambers MB. Light-Initiated C–H Activation via Net Hydrogen Atom Transfer to a Molybdenum(VI) Dioxo. J Am Chem Soc 2022; 144:20472-20483. [DOI: 10.1021/jacs.2c09235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saeed Fosshat
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | | | - Courtney L. Baumberger
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Victor R. Ortiz
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Matthew B. Chambers
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
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7
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Bresciani G, Zacchini S, Famlonga L, Pampaloni G, Marchetti F. Trapping carbamates of α-Amino acids: One-Pot and catalyst-free synthesis of 5-Aryl-2-Oxazolidinonyl derivatives. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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8
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Bartalucci N, Marchetti F, Zacchini S, Pampaloni G. Decarbonylation of phenylacetic acids by high valent transition metal halides. Dalton Trans 2019; 48:5725-5734. [DOI: 10.1039/c9dt00551j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The unusual decarbonylation of α-phenyl carboxylic acids with suitable substituents is a general reaction promoted at room temperature by homoleptic halides of high valent transition metals.
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Affiliation(s)
- Niccolò Bartalucci
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- I-40136 Bologna
- Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- I-56124 Pisa
- Italy
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9
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Biancalana L, Bortoluzzi M, Ferretti E, Hayatifar M, Marchetti F, Pampaloni G, Zacchini S. The reactions of α-amino acids and α-amino acid esters with high valent transition metal halides: synthesis of coordination complexes, activation processes and stabilization of α-ammonium acylchloride cations. RSC Adv 2017. [DOI: 10.1039/c7ra00073a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We describe the synthesis of rare coordination compounds of early transition metals with α-amino acids and α-amino acid esters, the unusual C–C dimerization ofl-proline, and the stabilization of reactive α-ammonium acylchloride cations.
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Affiliation(s)
- Lorenzo Biancalana
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Marco Bortoluzzi
- Ca' Foscari University of Venice
- Dipartimento di Scienze Molecolari e Nanosistemi
- I-30175 Mestre
- Italy
| | - Eleonora Ferretti
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Mohammad Hayatifar
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Fabio Marchetti
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Guido Pampaloni
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Stefano Zacchini
- University of Bologna
- Dipartimento di Chimica Industriale “Toso Montanari”
- I-40136 Bologna
- Italy
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10
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Bartalucci N, Bortoluzzi M, Marchetti F, Pampaloni G, Schoch S, Zacchini S. Unusual activation pathways of amines in the reactions with molybdenum pentachloride. NEW J CHEM 2017. [DOI: 10.1039/c6nj03992h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Both single electron reduction and oxidation of Mo(v) guide the activation of a series of aliphatic amines when these are allowed to react with MoCl5.
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Affiliation(s)
- Niccolò Bartalucci
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Marco Bortoluzzi
- Università di Venezia Ca' Foscari
- Dipartimento di Scienze Molecolari e Nanosistemi
- I-30170 Mestre (VE)
- Italy
| | - Fabio Marchetti
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Guido Pampaloni
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Silvia Schoch
- Università di Pisa
- Dipartimento di Chimica e Chimica Industriale
- I-56124 Pisa
- Italy
| | - Stefano Zacchini
- Università di Bologna
- Dipartimento di Chimica Industriale “Toso Montanari”
- I-40136 Bologna
- Italy
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11
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Bortoluzzi M, Ferretti E, Hayatifar M, Marchetti F, Pampaloni G, Zacchini S. One‐Pot Intermolecular C–S Self‐Coupling of Dimethyl Sulfoxide Promoted by Molybdenum Pentachloride. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marco Bortoluzzi
- Ca' Foscari Università di Venezia Dipartimento di Scienze Molecolari e Nanosistemi Via Torino 15530170Mestre (VE)Italy
| | - Eleonora Ferretti
- Università di Pisa Dipartimento di Chimica e Chimica Industriale Via Moruzzi 1356124PisaItaly
| | - Mohammad Hayatifar
- Università di Pisa Dipartimento di Chimica e Chimica Industriale Via Moruzzi 1356124PisaItaly
| | - Fabio Marchetti
- Università di Pisa Dipartimento di Chimica e Chimica Industriale Via Moruzzi 1356124PisaItaly
| | - Guido Pampaloni
- Università di Pisa Dipartimento di Chimica e Chimica Industriale Via Moruzzi 1356124PisaItaly
| | - Stefano Zacchini
- Università di Bologna Dipartimento di Chimica Industriale “Toso Montanari” Viale Risorgimento 440136BolognaItaly
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12
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Evangelisti C, Hayatifar M, Marchetti F, Marelli M, Pampaloni G, Piccinelli F. Synthesis of Nanocrystalline TiOF2 Embedded in a Carbonaceous Matrix from TiF4 and d-Fructose. Inorg Chem 2016; 55:1816-20. [DOI: 10.1021/acs.inorgchem.5b02715] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claudio Evangelisti
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR), Via G. Fantoli 16/15, I-20138 Milano, Italy
| | - Mohammad Hayatifar
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi
13, I-56124 Pisa, Italy
| | - Fabio Marchetti
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi
13, I-56124 Pisa, Italy
| | - Marcello Marelli
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR), Via G. Fantoli 16/15, I-20138 Milano, Italy
| | - Guido Pampaloni
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi
13, I-56124 Pisa, Italy
| | - Fabio Piccinelli
- Laboratorio
di Chimica dello Stato Solido, Dipartimento di Biotecnologie, Università di Verona, Strada Le Grazie 15, I-37134 Verona, Italy
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