Designing Thermally Stable Iconic Liquid Stationary Phases for Gas Chromatography and Examining Their Structure-property Relationships PDF Download
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Author: Rahul A. Patil
Publisher:
ISBN:
Category : Chemistry, Analytic
Languages : en
Pages : 222
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Book Description
Ionic liquids are popular in diverse scientific applications because of their unique physicochemical properties. The physicochemical properties of ionic liquids can be "tuned" by the modification of their structural moieties. Understanding of structure-property relationship is important if one wants to introduce a desired property in ionic liquid for a specific application. The initial part of this thesis will discuss the understanding of structure-property relationship of dicationic ionic liquids. Ionic liquids with high thermal stability are useful in many applications from simple solvents for high temperature reactions to high vacuum lubricants for space applications. This thesis presents the design, synthesis, and characterization of different thermally stable dicationic ionic liquids. ILs with TGA thermal stabilities in the range of 330 to 467 °C and inverse gas chromatography stabilities up to 400 °C are reported. The thesis also provides an understanding of the thermal behavior of ionic liquids at higher temperatures. The first, in depth thermal decomposition study of dicationic ionic liquids by using electrospray ionization mass spectrometer is presented, and it discusses the mechanism of thermal degradation of ionic liquids and their degradation products at high temperatures. Two important applications of thermally stable ionic liquids, stationary phases for gas chromatography and solvents for high temperature reactions are discussed in this thesis. Applications of thermally stable dicationic ionic liquid gas chromatography stationary phases for the high temperature separation of high molecular weight compounds is presented. Applications of ionic liquid stationary phases in the separation of structural isomers of toxic environmental pollutants, compounds with different functional groups and polarities are reported. A fundamental investigation of the effect of structural modifications such as cations, linkage chains, and anions on the selectivities of ionic liquids is discussed. The last chapter of the thesis presents the application of thermally stable monocationic phosphonium ionic liquid as a solvent in a high temperature synthesis. The advantages of higher thermal stability and the catalytic properties of ionic liquid were utilized for the "rapid" deprotection of tert-butoxy amino acids and peptides at higher temperatures.
Author: Rahul A. Patil
Publisher:
ISBN:
Category : Chemistry, Analytic
Languages : en
Pages : 222
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Book Description
Ionic liquids are popular in diverse scientific applications because of their unique physicochemical properties. The physicochemical properties of ionic liquids can be "tuned" by the modification of their structural moieties. Understanding of structure-property relationship is important if one wants to introduce a desired property in ionic liquid for a specific application. The initial part of this thesis will discuss the understanding of structure-property relationship of dicationic ionic liquids. Ionic liquids with high thermal stability are useful in many applications from simple solvents for high temperature reactions to high vacuum lubricants for space applications. This thesis presents the design, synthesis, and characterization of different thermally stable dicationic ionic liquids. ILs with TGA thermal stabilities in the range of 330 to 467 °C and inverse gas chromatography stabilities up to 400 °C are reported. The thesis also provides an understanding of the thermal behavior of ionic liquids at higher temperatures. The first, in depth thermal decomposition study of dicationic ionic liquids by using electrospray ionization mass spectrometer is presented, and it discusses the mechanism of thermal degradation of ionic liquids and their degradation products at high temperatures. Two important applications of thermally stable ionic liquids, stationary phases for gas chromatography and solvents for high temperature reactions are discussed in this thesis. Applications of thermally stable dicationic ionic liquid gas chromatography stationary phases for the high temperature separation of high molecular weight compounds is presented. Applications of ionic liquid stationary phases in the separation of structural isomers of toxic environmental pollutants, compounds with different functional groups and polarities are reported. A fundamental investigation of the effect of structural modifications such as cations, linkage chains, and anions on the selectivities of ionic liquids is discussed. The last chapter of the thesis presents the application of thermally stable monocationic phosphonium ionic liquid as a solvent in a high temperature synthesis. The advantages of higher thermal stability and the catalytic properties of ionic liquid were utilized for the "rapid" deprotection of tert-butoxy amino acids and peptides at higher temperatures.
Author: H. Rotzsche
Publisher: Elsevier
ISBN: 0080858554
Category : Science
Languages : en
Pages : 425
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Book Description
The primary aim of this volume is to make the chemist familiar with the numerous stationary phases and column types, with their advantages and disadvantages, to help in the selection of the most suitable phase for the type of analytes under study. The book also provides detailed information on the chemical structure, physico-chemical behaviour, experimental applicability, physical data of liquid and solid stationary phases and solid supports. Such data were previously scattered throughout the literature. To understand the processes occurring in the separation column and to offer a manual both to the beginner and to the experienced chromatographer, one chapter is devoted to the basic theoretical aspects. Further, as the effectiveness of the stationary phase can only be considered in relation to the column type, a chapter on different column types and the arrangement of the stationary phase within the column is included. The secondary aim of this book is to stimulate the development of new and improved standardized stationary phases and columns, in order to improve the reproducibility of separations, as well as the range of applications.
Author: Harald Rotzsche
Publisher:
ISBN:
Category :
Languages : en
Pages : 409
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Book Description
Author: S. M. Sohel Murshed
Publisher: BoD – Books on Demand
ISBN: 1839684984
Category : Science
Languages : en
Pages : 156
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Book Description
Because of their unique properties and fascinating features, ionic liquids have numerous potential applications in engineering, analytics, physical chemistry, electrochemistry, tribology, and biology. This book discusses the thermophysical properties and other features of these emerging liquids. It also presents different methods of their production, as well as examines their potential use as new lubricants or lubricant additives and in gas chromatography. In addition, the book provides an archeological, historical, and technological background of alkali and alkali–earth salts and hydroxides. The book is a useful resource for students, researchers, engineers, manufacturers, academicians, and professionals working in the field of ionic liquids for real-world applications.
Author: Eli Grushka
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 256
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Book Description
Author: Mark B. Shiflett
Publisher: Springer
ISBN: 9783030352448
Category : Science
Languages : en
Pages : 288
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Book Description
This book provides an overview of the current and emerging industrial applications of ionic liquids, covering the core processes, the practical implementation and technical challenges involved, and exploring potential future directions for research and development. The introductory chapter describes the unique physical and chemical properties of ionic liquids, and illustrates the vast potential for application of these materials across the industrial landscape. Following this, individual chapters written by leading figures from industry and academia address specific processes and products, such as the development of a new chloroaluminate ionic liquid as an alkylation catalyst and a new class of capillary gas chromatography (GC) columns with stationary phases based on ionic liquids. Over the past twenty years, ionic liquids have moved from being considered as mere academic curiosities to having genuine applications in fields as wide-ranging as biotechnology, biorefineries, catalysis, pharmaceuticals, renewable fuels, and sustainable energy. This book highlights several commercial products and processes that use or will soon be using ionic liquids.
Author:
Publisher:
ISBN:
Category : Gas chromatography
Languages : en
Pages : 122
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Book Description
Author: Wentong Tian
Publisher:
ISBN:
Category : Gas chromatography
Languages : en
Pages : 136
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Book Description
Author: Robert L. Grob, PhD
Publisher: John Wiley & Sons
ISBN: 047165115X
Category : Science
Languages : en
Pages : 1059
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Book Description
The bible of gas chromatography-offering everything the professional and the novice need to know about running, maintaining, and interpreting the results from GC Analytical chemists, technicians, and scientists in allied disciplines have come to regard Modern Practice of Gas Chomatography as the standard reference in gas chromatography. In addition to serving as an invaluable reference for the experienced practitioner, this bestselling work provides the beginner with a solid understanding of gas chromatographic theory and basic techniques. This new Fourth Edition incorporates the most recent developments in the field, including entirely new chapters on gas chromatography/mass spectrometry (GC/MS); optimization of separations and computer assistance; high speed or fast gas chromatography; mobile phase requirements: gas system requirements and sample preparation techniques; qualitative and quantitative analysis by GC; updated information on detectors; validation and QA/QC of chromatographic methods; and useful hints for good gas chromatography. As in previous editions, contributing authors have been chosen for their expertise and active participation in their respective areas. Modern Practice of Gas Chromatography, Fourth Edition presents a well-rounded and comprehensive overview of the current state of this important technology, providing a practical reference that will greatly appeal to both experienced chomatographers and novices.
Author: Joseph F. Solsky
Publisher:
ISBN:
Category :
Languages : en
Pages : 374
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Book Description
