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Heterobimetallic d—f Metal Complexes as Potential Single‐Source Precursors for MOCVD: Structure and Thermodynamic Study of the Sublimation of [Ni(salen)Ln(hfa) 3 ], Ln = Y, Gd
Author(s) -
Gleizes Alain,
Julve Miguel,
Kuzmitalia,
Alikhanyan Andrei,
Lloret Francesc,
Malkerova Irina,
Sanz José Luis,
Senocq François
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199808)1998:8<1169::aid-ejic1169>3.0.co;2-q
Subject(s) - chemistry , isostructural , sublimation (psychology) , crystallography , yttrium , crystal structure , inorganic chemistry , organic chemistry , psychology , psychotherapist , oxide
Heterobimetallic [Ni(salen)Ln(hfa) 3 ] species [H 2 salen and Hhfa being N,N′ ‐ethylenebis(salicylideneimine) and hexa‐fluoroacetylacetone respectively], where Ni(salen) acts as a neutral chelating ligand towards Ln III , form a series of isostructural compounds for Ln = Y III and any lanthanide III cation from La to Yb. They are also isostructural with some of the [Cu(salen)Ln(hfa) 3 ] compounds. They sublime without decomposition under vacuum which makes them potential single‐source precursors in MOCVD. Sublimation, thermal behaviour, pressure and composition of the vapour phase versus temperature have been studied for the yttrium derivative, by means of thermal analyses, and mass spectrometry using a Knudsen cell. The dissociation process [Ni(salen)Y(hfa) 3 ] = Ni(salen) + Y(hfa) 3 has been thermodynamically investigated. Information on the solid‐state intermolecular interactions in relation with volatility was obtained through the crystal structure determination of the gadolinium derivative. A comparative structural study of [Ni(salen)Gd(hfa) 3 ] and [Cu(saloph)Y(hfa) 3 ], [H 2 saloph is N,N′ ‐ o ‐phenylenebis(salicylideneimine)], allows to under‐stand why the latter is less volatile than the former despite similar molecular and solid‐state structures.