The monoglyme [CH3OCH2CH2OCH3] and diglyme [CH3O(CH2CH2O)2CH3] adducts of the neodymium trishexafluoroacetylacetonato [Nd(hfa)3monoglymeH2O and Nd(hfa)3diglyme] have been synthesised in a single step reaction. They have been characterized by elemental analyzes, mass spectrometry, and IR spectroscopy. Single crystal X-ray diffraction studies provide evidence of a mononuclear nine-coordinated complex with a monocapped square antiprismatic structure for the Nd(hfa)3diglyme (monoclinic system, space group P21/n; a = 9.7717(2), b = 15.5723(4), c = 20.5620(5) Å, b = 103.668(2); Z = 4). The Nd(hfa)3monoglymeH2O consists of asymmetric units containing two similar molecules (monoclinic system, space group = C2; a = 16.7057(4), b = 12.2579(4), c = 29.3734(5) Å, b = 101.170(3), Z = 8). The mass transport properties of these adducts have been investigated by thermogravimetric analysis which revealed high volatility and good thermal stability with a residue left lower than 3%. The Nd(hfa)3diglyme has been successfully applied to the low-pressure metal organic chemical vapor deposition (MOCVD) of NdBa2Cu3O7d thin films.
Neodymium beta-diketonate glyme complexes: Synthesis and characterization of volatile precursors for MOCVD applications / R. Lo Nigro; R. G. Toro; M. E. Fragala'; P. Rossi; P. Dapporto; G. Malandrino. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 362:(2009), pp. 4523-4529. [10.1016/j.ica.2009.05.044]
Neodymium beta-diketonate glyme complexes: Synthesis and characterization of volatile precursors for MOCVD applications
ROSSI, PATRIZIA;
2009
Abstract
The monoglyme [CH3OCH2CH2OCH3] and diglyme [CH3O(CH2CH2O)2CH3] adducts of the neodymium trishexafluoroacetylacetonato [Nd(hfa)3monoglymeH2O and Nd(hfa)3diglyme] have been synthesised in a single step reaction. They have been characterized by elemental analyzes, mass spectrometry, and IR spectroscopy. Single crystal X-ray diffraction studies provide evidence of a mononuclear nine-coordinated complex with a monocapped square antiprismatic structure for the Nd(hfa)3diglyme (monoclinic system, space group P21/n; a = 9.7717(2), b = 15.5723(4), c = 20.5620(5) Å, b = 103.668(2); Z = 4). The Nd(hfa)3monoglymeH2O consists of asymmetric units containing two similar molecules (monoclinic system, space group = C2; a = 16.7057(4), b = 12.2579(4), c = 29.3734(5) Å, b = 101.170(3), Z = 8). The mass transport properties of these adducts have been investigated by thermogravimetric analysis which revealed high volatility and good thermal stability with a residue left lower than 3%. The Nd(hfa)3diglyme has been successfully applied to the low-pressure metal organic chemical vapor deposition (MOCVD) of NdBa2Cu3O7d thin films.
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