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A Novel Manganese(II) MOCVD Precursor: Synthesis, Characterization, and Mass Transport Properties of Mn(hfa)2•tmeda

Authors

  • Zaira Lipani,

    1. Dipartimento di Scienze Chimiche, Università di Catania, ISTM-CNR and INSTM, UdR Catania, Viale A. Doria 6, I-95125 Catania, (Italy)
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  • Maria R. Catalano,

    1. Dipartimento di Scienze Chimiche, Università di Catania, ISTM-CNR and INSTM, UdR Catania, Viale A. Doria 6, I-95125 Catania, (Italy)
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  • Patrizia Rossi,

    1. Dipartimento di Ingegneria Industriale, Università di Firenze, Via Santa Marta 3, I-50139 Firenze, (Italy)
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  • Paola Paoli,

    1. Dipartimento di Ingegneria Industriale, Università di Firenze, Via Santa Marta 3, I-50139 Firenze, (Italy)
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  • Graziella Malandrino

    Corresponding author
    1. Dipartimento di Scienze Chimiche, Università di Catania, ISTM-CNR and INSTM, UdR Catania, Viale A. Doria 6, I-95125 Catania, (Italy)
    • Dipartimento di Scienze Chimiche, Università di Catania, ISTM-CNR and INSTM, UdR Catania, Viale A. Doria 6, I-95125 Catania, (Italy)
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  • The authors thank the MIUR for the financial support within the PRIN 2009 N. 20097 × 44S7_002 (Hybrid materials based on lanthanide complexes for sensing applications) and the FIRB ITALNANONET RBPR05JH2P project.

Abstract

The complex, Mn(hfa)2•tmeda [(H-hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentandione, tmeda = N,N,N′,N′-tetramethylethylendiamine)], is synthesized in a single-step reaction and characterized by elemental analysis, thermal analysis, and infrared (IR) spectroscopy. The solid-state crystal structure of Mn(hfa)2•tmeda provides evidence of a mononuclear structure. The thermal analyses show that the complex is thermally stable and can be evaporated to leave less than 2% residue. The complex properties are compared with the first generation, commercially available MnII and MnIII precursors, Mn(acac)2 (Hacac = acetylacetone) and Mn(tmhd)3 (Htmhd = 2,2,6,6-tetramethyl-3,5-heptanedione), respectively. Mn(hfa)2•tmeda represents the first example of manganese(II) precursor that can be used in the liquid phase without decomposition, thus providing constant evaporation rates, even for long deposition times. It is successfully applied to the reduced-pressure, metal-organic (MO)CVD of the Mn3O4 phase.

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