Well-defined polynuclear heterobimetallic complexes as precursors for ceramic and magnetic materials

Abstract

Well-defined heterobi- and heteropolymetallic alkoxides are valuable precursors for numerous oxide materials with great application potential. Simple and high yield synthetic routes to such compounds are always highly desirable. This Perspective describes one of the methods that utilizes, as starting materials, homoleptic monometallic alkoxides with a free alcoholic moiety coordinated to the metal. The moiety constitutes a convenient anchor for upcoming organometallics.

Metal–Organic Derivatives with Fluorinated Ligands as Precursors for Inorganic Nanomaterials

“…145 The reactions of Tl 2 CO 3 and (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O with H-hfac in the presence of diglyme afforded [Tl(hfac)(diglyme)] 146 and [Mg(hfac) 2 (H 2 O) 2 ]·2diglyme, 51 respectively, the diglyme ligands not being directly bonded to magnesium center in the latter. Starting with Ru 3 (CO) 12 , Chi et al synthesized mixedligand complexes [Ru(CO) 2 (L) 2 ] (L = tfac, hfac, iminoalkoxo). 39,147,148 2.2.…”

Green approach for the synthesis and characterization of ZrSnO4 nanopowder

“…The functional properties can be tuned by modifying the size, shape and composition of the synthon along by studying state of art of the synthetic method with pH control which helps to design a device for their technological applications with synergic effects to control the nucleation and its growth. Understanding the nucleation and growth process by self-assembling helps to integrate functional structures via optimizing hydrolysis and kinetic process based on electro-negativity of metal ion (Klein 1988;Brinker and Scherer 1990;Sakka 2004;Szafert et al 2008;Grado-Caffaro 2008;Bilecka and Niederberger 2010;Bang and Suslick 2010;Liu et al 2011;Hassan et al 2012;Precht and Campbel 2013;An and Soorrjai 2015).…”

“…Bimetallic oxide exhibits novel physico-chemical properties that can be tailored with composition, size and atomic ordering. Metal ion plays a crucial role in balancing the thermodynamic-kinetic parameters to control functional behavior due to its coordination with metal ions and also tuning of surface morphology leads to the formation of nanostructure material with high performance (Klein 1988;Brinker and Scherer 1990;Kessler 2003;Sakka 2004;Szafert et al 2008;Bilecka and Niederberger 2010;Hassan et al 2012;Precht and Campbel 2013;An and Soorrjai 2015). During synthesis, we focused the phase separation with non-aggregated particles by retaining stoichiometric ratio under control.…”

Alkaline Earth Metal Zirconate Perovskites MZrO3 (M=Ba2+, Sr2+, Ca2+) Derived from Molecular Precursors and Doped with Eu3+ Ions

“…[ Complex 4 is an octanuclear calcium zirconium chloro alkoxide based on ac entral Ca 6 Zr 2 (m 2 -O) 12 (m 2 -Cl) 2 core. Formally, 4 is ac entrosymmetric cluster consistingo ft wo {ZrCa 3 (m 2 ,h 2 -OR) 6 (h 2 -OR) 2 (m-Cl)Cl 3 }m oieties bridged by two m 2 -chloridol igands ( Figure 3).…”

“…The main problem associated with the use of solid-phase synthesis for preparing alkaline earth metal oxide nanomaterials is poor product reproducibility.T his is due to the highly non-equilibrium nature of the considered systems and the differentp roperties displayed by the different stable states present in the system.T he main factors that influence structure formation include deviation from the stoichiometry,i ntroductiono fc hemical impurities, for example, by milling and high-temperature firing, undesirable phase formation, large grain sizes, poor chemical homogeneity, and expensive equipment requirements. [12] We recently showed that reactions of multimetal components and their transformation into ac omplex product by as ingle-step synthesis route are very attractive for preparing binary oxide nanomaterials. [13][14][15][16][17][18] Such heterometallic compounds with atypical combinations of elements have af ixed metal stoichiometry at the molecular level.…”