Crown‐Ether‐Like Structures Derived from a Ti8O8(Carboxylate)16 Metallacycle

Co3O4-modified CeO2 (Co/Ce 1:4) was prepared by a combination of sol–gel processing and solvothermal treatment. The distribution of Co was controlled by means of the synthesis protocol to yield three different morphologies, namely, Co3O4 nanoparticles located on the surface of CeO2 particles, coexistent Co3O4 and CeO2 nanoparticles, or Co oxide structures homogeneously distributed within CeO2. The effect of the different morphologies on the properties of Co3O4–CeO2 was investigated with regard to the crystallite phase(s), particle size, surface area, and catalytic activity for CO oxidation. The material with Co3O4 nanoparticles finely dispersed on the surface of CeO2 particles had the highest catalytic activity.

show abstract

“…We have previously shown that co-processing of metal alkoxides and metal acetates results in mixed-oxide structures. [9]…”

Section: Resultsmentioning

confidence: 99%

Different Synthesis Protocols for Co₃O₄–CeO₂ Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Yang

Lukashuk

Akbarzadeh

et al. 2014

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

show abstract

“…Yet, the lithographic performance of Ti‐based oxoclusters could not be tested due to the poor solubility of this material, which hindered its deposition as a thin film . This compound consists of an octameric ring of metal atoms bridged by µ 2 ‐O oxygens and 16 methacrylate ligands (Ti 8 O 8 Mc 16 noted as Ti 8 Mc 16 ) …”

Section: Introductionmentioning

confidence: 99%

Hybrid EUV Resists with Mixed Organic Shells: A Simple Preparation Method

Liu

Vockenhuber

et al. 2019

Eur J Inorg Chem

View full text Add to dashboard Cite

Metal‐containing molecular hybrid compounds, such as metal oxoclusters (MOCs), are promising materials for extreme ultraviolet (EUV) lithography. The solubility, processability, and reactivity towards EUV photons in these compounds are mostly determined by the composition of their organic shells. Therefore, gaining molecular control on the composition of the shell is crucial to tune their lithographic performance of sensitivity, resolution, and line‐edge roughness. In this work, a new method to prepare MOCs that feature two types of carboxylate ligands is presented. In this method, amine‐functionalized resins are used for the purification step. By using this protocol, Ti‐ and Zr‐based MOCs with mixed‐ligands organic shells were synthesized. The new compounds showed clear differences in the processability and sensitivity as EUV resists compared to their analogues featuring only one type of ligand. The results validate this new synthetic approach for the preparation of custom‐made EUV resists towards better lithographic performance.

show abstract

“…Interestingly, a structure akin to that of the Ti 6 Ln 2 was obtained upon reaction of Ti(OiPr) 4 with lead acetate and methacrylic acid. Ti 6 Pb 2 O 5 (OiPr) 4 (OMc) 14 differs in a way that the six [TiO 6 ] units are arranged in a semicircle around the central M 2 unit rather than two opposite quarter-circles as in the Ti 6 Ln 2 structure [40].…”

Section: Mixed-metal Oxo Clustersmentioning

confidence: 99%

Heterobimetallic sol–gel precursors and intermediates

Schubert

2015

J Sol-Gel Sci Technol

Self Cite

View full text Add to dashboard Cite

The question how the metals in bimetallic solgel materials are positioned relative to each other and how the dispersion of the metals can be controlled is a major preparative and analytical challenge. Two particular aspects are addressed: The first is an alternative type of single-source precursors where the two metals are interlinked through an organic spacer. The new options provided by this approach are demonstrated for metal oxide/ silica nanocomposites, zinc titanate and Co 3 O 4 /ceria catalysts. The second issue with regard to heterobimetallic systems is the kind of intermediates formed during sol-gel co-processing of two different metal precursors (metal alkoxides or metal alkoxide ? metal salt). Systematic investigation of the structures of Ti/M oxo clusters (M = main group or transition metal, or lanthanide) shows some interesting common construction principles and thus sheds light on early stages of the structural evolution in mixed-metal oxide systems. Graphical abstract

show abstract

Crown‐Ether‐Like Structures Derived from a Ti₈O₈(Carboxylate)₁₆ Metallacycle

Abstract: Mixed-metal clusters have been obtained from the reaction of titanium alkoxides with either strontium or lead acetate and methacrylic acid.

Cited by 43 publications

References 13 publications

Different Synthesis Protocols for Co₃O₄–CeO₂ Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Different Synthesis Protocols for Co₃O₄–CeO₂ Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Hybrid EUV Resists with Mixed Organic Shells: A Simple Preparation Method

Heterobimetallic sol–gel precursors and intermediates

Contact Info

Product

Resources

About

Crown‐Ether‐Like Structures Derived from a Ti8O8(Carboxylate)16 Metallacycle

Abstract: Mixed-metal clusters have been obtained from the reaction of titanium alkoxides with either strontium or lead acetate and methacrylic acid.

Cited by 43 publications

References 13 publications

Different Synthesis Protocols for Co3O4–CeO2 Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Different Synthesis Protocols for Co3O4–CeO2 Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Hybrid EUV Resists with Mixed Organic Shells: A Simple Preparation Method

Heterobimetallic sol–gel precursors and intermediates

Contact Info

Product

Resources

About

Crown‐Ether‐Like Structures Derived from a Ti₈O₈(Carboxylate)₁₆ Metallacycle

Different Synthesis Protocols for Co₃O₄–CeO₂ Catalysts—Part 1: Influence on the Morphology on the Nanoscale

Different Synthesis Protocols for Co₃O₄–CeO₂ Catalysts—Part 1: Influence on the Morphology on the Nanoscale