Download or read book Synthesis Structure and Catalytic Activity of Titanium Zirconium and Hafnium Containing Polyoxometalates written by Ghada Al-Kadamany and published by . This book was released on 2010 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyoxometalates (POMs) represent by now a well-known class of discrete, molecular metal-oxides, which are attractive due to a large structural and compositional variety combined with a multitude of properties. Vacant (lacunary) polytungstate precursors allow for incorporation of a vast number of electrophiles including transition metals. The resulting products often have properties which render them of interest for potential applications in different areas such as catalysis, medicine and materials science. The exploration of the interaction between lacunary polyoxometalates (POMs) and group 4 (Ti, Zr and Hf) transition metal ions has been mainly driven by the fact that potential products may serve as oxidation catalysts or even as soluble molecular analogues of known Ti and Zr-containing heterogeneous catalysts. This document is a summary of three-year research conducted in this specific area, that is investigation of titanium containing POMs, the chemistry involved, synthesis, solid state and solution characterization and catalytic performance.

Download or read book Synthesis Structure and Catalytic Activity of Cationic Zirconium and Hafnium Alkyl Complexes written by Simon John Lancaster and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Chemistry of Titanium Zirconium and Hafnium written by R. J. H. Clark and published by Elsevier. This book was released on 2018-03-12 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chemistry of Titanium, Zirconium and Hafnium deals with the chemistry of titanium, zirconium, and hafnium and covers topics ranging from the occurrence and metallurgy of all three elements to their nuclear, physical, and chemical properties as well as analytical chemistry. The compounds of titanium, zirconium, and hafnium are also discussed. This volume is comprised of two chapters and opens with a historical overview and discovery of titanium, along with its occurrence and distribution, metallurgical aspects, and nuclear and physicochemical properties. The compounds of titanium are also considered, including alloys and complexes; hydrides and oxides; halides and oxyhalides; titanates and antimonides; and carbides and borides. The second chapter is devoted to zirconium and hafnium, their occurrence and metallurgy; and physical, chemical, and biological properties. Compounds of zirconium and hafnium are described, from alloys and hydrides to zirconates and hafnates; nitrides, phosphides, and arsenides; carbides, silicides, and germanides; molybdates, tungstates, halates, and perchlorates; alkoxides, mercaptides, and dithiocarbamates; and amides, alkylamides, triazenes, phthalocyanines, and bipyridyls. This book will be a valuable source of information for inorganic chemists.

Download or read book Organometallic Chemistry of Titanium Zirconium and Hafnium written by P.C. Wailes and published by Elsevier. This book was released on 2012-12-02 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organometallic Chemistry of Titanium, Zirconium, and Hafnium covers the chemistry of organic complexes of titanium, zirconium, and hafnium having metal-to-carbon linkage. This book is organized into eight chapters that consider the significant developments in delineating the chemistry of these metal derivatives. This book starts with a description of the stability and bonding in cyclopentadienyl derivatives of the metals, based on the thermodynamic and spectroscopic evidence. The remaining chapters discuss the preparation and reactions of titanium-, zirconium-, and hafnium-bonded organic compounds. These chapters also look into the synthetic difficulties encountered from the reactions and preparation of these compounds. The stabilization and adduct formation of these metal complexes are also explored. Organic chemists and organic chemistry researchers and students will find this book invaluable.

Download or read book Synthesis Titanium Containing Structure Catalyst and Their Catalytic Activity in Oxidation of Alkenes written by Noorulsyahidaini Golbaha and published by . This book was released on 2010 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modification of Zirconium and Hafnium Alkoxides written by Gerald I. Spijksma and published by . This book was released on 2006 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research within this thesis is focused on the synthesis and characterization of a new generation of thin oxide layers with nanostructured pore morphologies. In the present work it was chosen to work with zirconia and hafnia derived materials, including related heterometallic compounds with, for instance, titanium as an additional element.

Download or read book Synthesis Structure and Reactivity of Electron deficient Zirconium and Hafnium Polyhydride Complexes written by Cindy Visser and published by . This book was released on 2003* with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organometallic Chemistry of Titanium Zirconium and Hafnium written by P. C. Wailes and published by . This book was released on 1974-01-01 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organometallic Chemistry of Titanium, Zirconium, and Hafnium...

Download or read book The Chemistry of Titanium Zirconium and Hafnium written by R.J.H. Clark and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Single site Titanosilicates with Targeted Connectivity and Nuclearity of Titanium IV written by Nan Chen and published by . This book was released on 2012 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanosilicates are a family of porous materials that have shown excellent catalytic activity in olefin epoxidation and many other selective oxidation reactions. These materials have been extensively studied in the past few decades. One of the central questions in these investigations has been to define the catalytically active centers. The traditional synthesis of wet impregnation followed by calcination often produces more than one type of catalytic center within the same matrix, i.e. different coordination, connectivity and nuclearity. Each type potentially possesses unique catalytic activity. Co-existence of multiple catalytic centers makes it impossible to establish the relationship between the structure of titanium center and catalytic activity. The goal of this research was to establish a structure-function relationship in titanosilicate materials through targeted synthesis of single-site nanostructured catalysts, in which titanium centers are isolated from one another while possessing the uniform structure. A building block synthetic methodology was utilized to prepare a series of catalysts, namely 2-connected (2C), 3-connected (3C), 4-connected (4C) and tetranuclear (Ti4 [subscript 4]) titanium catalysts. These materials were characterized in detail via gravimetric analysis, solid state NMR, diffuse reflectance UV spectroscopy, infrared spectroscopy, BET surface area and X-ray absorption spectroscopy (XANES and EXAFS). Catalytic activity of each catalyst was examined in the oxidation of 2, 3, 6-trimethylphenol with aqueous hydrogen peroxide to give the corresponding benzoquinone. Under identical conditions, high to mediocre catalytic activity has been observed in a sequence of Ti4 [subscript 4]> 2C> 3C H"4C, in terms of both conversion and selectivity. All synthesized catalysts showed excellent stability and recyclability with aqueous hydrogen peroxide at elevated temperature. A structure-function relationship was therefore developed through targeted synthesis of novel single-site titanosilicate catalysts.

Download or read book Green Science and Technology written by Enoch Y. Park and published by CRC Press. This book was released on 2019-10-16 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and up-to-date review of recent trends of green science and technology. Worldwide deterioration of environment and global warming threaten our lifestyle and the survival of all creatures. In order to weather these problems, we need to construct a multidisciplinary approach involving the fusion of various advanced researches. The book begins with an overview on fundamental research about generation and utilization of renewable energy, protection of the earth's ecosystem for better coexistence with nature, development of artificial intelligence-based agriculture and molecular recognitionbased welfare and covers a wide range of innovative research on green science and technology.

Download or read book Journal written by American Chemical Society and published by . This book was released on 2001 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Innovative Catalysis in Organic Synthesis written by Pher G. Andersson and published by John Wiley & Sons. This book was released on 2012-04-16 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: C-H, C-O, C-C, and C-Heteroatom bond forming processes by using metal-ligand approaches for the synthesis of organic compounds of biological, pharmacological and organic nanotechnological utility are the key areas addressed in this book. Authored by a European team of leaders in the field, it brings together innovative approaches for a variety of catalysis reactions and processes frequently applied in organic synthesis into a handy reference work. It covers all major types of catalysis, including homogeneous, heterogeneous, and organocatalysis, as well as mechanistic and computational studies. Special attention is paid to the improvements in efficiency and sustainability of important catalytic processes, such as selective oxidations, hydrogenation, and cross-coupling reactions, and to their utilization in industry. The result is a valuable resource for advanced researchers in both academia and industry, as well as graduate students in organic chemistry aiming for chemo-, regio- or stereoselective synthesis of organic compounds by using novel catalytic systems.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1996 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Zirconium and Hafnium written by and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Coordination Chemistry II written by J. A. McCleverty and published by Newnes. This book was released on 2003-12-03 with total page 11845 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.