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
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
复制标题
异双金属 d-f 金属配合物作为 MOCVD 的潜在单源前驱体：[Ni(salen)Ln(hfa)3], Ln = Y, Gd 升华的结构和热力学研究
DOI：
10.1002/(sici)1099-0682(199808)1998:8
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发表时间：
1998
影响因子：
2.3
通讯作者：
F. Senocq
中科院分区：
文献类型：
--
作者：
A. Gleizes;M. Julve;N. Kuzmina;A. Alikhanyan;F. Lloret;I. Malkerova;J. Sanz;F. Senocq
异双金属 [Ni(salen)Ln(hfa)3] 物质 [H2salen 和 Hhfa 分别是 N,N'-亚乙基双(水杨亚胺) 和六氟乙酰丙酮]，其中 Ni(salen) 作为 LnIII 的中性螯合配体，形成 Ln = YIII 和从 La 到 Yb 的任何镧系元素 III 阳离子的一系列同构化合物。它们还与一些 [Cu(salen)Ln(hfa)3] 化合物具有同构结构。它们在真空下升华而不分解，这使得它们成为 MOCVD 中潜在的单一来源前体。通过热分析和使用克努森池的质谱分析，研究了钇衍生物的升华、热行为、压力和气相组成与温度的关系。解离过程 [Ni(salen)Y(hfa)3] = Ni(salen) + Y(hfa)3 已进行热力学研究。通过钆衍生物的晶体结构测定获得了与挥发性相关的固态分子间相互作用的信息。 [Ni(salen)Gd(hfa)3] 和 [Cu(saloph)Y(hfa)3]（[H2saloph 是 N,N'-o-亚苯基双（水杨亚胺）]）的比较结构研究可以理解为什么后者的挥发性低于前者，尽管分子和固态结构相似。
Heterobimetallic [Ni(salen)Ln(hfa)3] species [H2salen and Hhfa being N,N′-ethylenebis(salicylideneimine) and hexa-fluoroacetylacetone respectively], where Ni(salen) acts as a neutral chelating ligand towards LnIII, form a series of isostructural compounds for Ln = YIII and any lanthanideIII 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], [H2saloph 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.