Periodic Mesoporous Organosilicas with Functional Chromophores PDF Download
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Author: Yan Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Author: Yan Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Author: Chang-Sik Ha
Publisher: Springer
ISBN: 9811329591
Category : Technology & Engineering
Languages : en
Pages : 318
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Book Description
This book provides a comprehensive overview of the fundamental properties, preparation routes and applications of a novel class of organic–inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). Mesoporous silicas are amorphous inorganic materials which have silicon and oxygen atoms in their framework with pore size ranging from 2 to 50 nm. They can be synthesized from surfactants as templates for the polycondensation of various silicon sources such as tetraalkoxysilane. In general, mesoporous silica materials possess high surface areas, tunable pore diameters, high pore volumes and well uniformly organized porosity. The stable chemical property and the variable ability for chemical modification makes them ideal for many applications such as drug carrier, sensor, separation, catalyst, and adsorbent. Among such mesoporous silicas, in 1999, three groups in Canada, Germany, and Japan independently developed a novel class of organic–inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). The organic functional groups in the frameworks of these solids allow tuning of their surface properties and modification of the bulk properties of the material. The book discusses the properties of PMOs, their preparation, different functionalities and morphology, before going on to applications in fields such as catalysis, drug delivery, sensing, optics, electronic devices, environmental applications (gas sensing and gas adsorption), biomolecule adsorption and chromatography. The book provides fundamental understanding of PMOs and their advanced applications for general materials chemists and is an excellent guide to these promising novel materials for graduate students majoring in chemical engineering, chemistry, polymer science and materials science and engineering.
Author: Steven Edward Dickson
Publisher:
ISBN:
Category :
Languages : en
Pages : 458
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Book Description
There is currently a great interest in the field of porous organosilica materials because of the high surface areas (> 1000 m2/g) and narrow pore size distributions which are beneficial for applications such as chromatography, chiral catalysis, sensing or selective adsorption. Periodic mesoporous organosilicas (PMOs) represent an interesting class of hybrid silica materials because of the wide variety of bridging organic groups which can be incorporated within the precursors [(OR)3Si-R-Si(OR)3] giving rise to materials with exceptional properties. We have synthesized and characterized various aromatic PMOs composed of supporting structural monomers (phenylene- or biphenylenebridged) and functional stilbene monomers (cis and trans) (1, 2). The effect of the different synthetic procedures and varying amounts of functional stilbene monomer on the properties of the materials was examined. The functional transstilbene component was determined to be well distributed in a phenylene-bridged PMO using P123 as a pore template from TEM techniques with Os staining. The trans-stilbene linkers were completely transformed to aryl aldehydes through ozonolysis with dimethylsulfide workup. Further transformation of the carbonyl functionality to an aryl imine showed a moderate level of success. Enantiomeric forms of a novel, chiral PMO precursor (CM) were synthesized and incorporated into biphenylene-bridged PMOs. Under basic pH conditions templated with C18TMACl, although very low levels of CM are incorporated, enantiomeric forms of chiral, porous materials are obtained as was verified by distinct mirror-image circular dichroism spectra. Powder XRD patterns suggest that a tightly packed asymmetric biphenylene arrangement may be necessary for the optical activity. Preliminary results using these materials as a chiral chromatographic phase are promising. Finally, a thin film morphology of an ethane-bridged PMO incorporating a thiol ligand, (3-mercaptopropyl)trimethoxysilane, was prepared on a fibre optic cable and used as a component in a heavy-metal sensing application.
Author: Wenhui Wang
Publisher:
ISBN:
Category : Catalysis
Languages : en
Pages : 0
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Author: Wolfram Robert Grüning
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Yucang Liang
Publisher:
ISBN: 9783899631623
Category :
Languages : en
Pages : 226
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Author: Dongyuan Zhao
Publisher: John Wiley & Sons
ISBN: 3527647899
Category : Science
Languages : en
Pages : 544
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Book Description
Mesoporous materials are a class of molecules with a large and uniform pore size, highly regular nanopores, and a large surface area. This book is devoted to all aspects and types of these materials and describes, in an in-depth and systematic manner, the step-by-step synthesis and its mechanism, as well as the characterization, morphology control, hybridization, and applications, of mesoporous molecular sieves. In so doing, it covers silicates, metal-doped silicates, nonsilicates, and organic-inorganic hybrids. Although the emphasis is on synthesis, the expert authors also discuss characterization and applications, ranging from catalysis and biochemistry to optics and the use of these materials as templates for nanomaterial synthesis. Both the fundamentals and the latest research results are covered, ensuring that this monograph serves as a reference for researchers in and newcomers to the field.
Author: Abdelhamid Sayari
Publisher: World Scientific
ISBN: 9812779167
Category : Technology & Engineering
Languages : en
Pages : 757
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Book Description
This proceedings volume contains selected and peer-reviewed original oral and poster contributions to be presented at the 5th International Symposium on Nanoporous Materials, Vancouver, Canada, May 25OCo28, 2008. It presents recent scientific advances in the area of nanoporous materials, especially those with ordered pores of sizes between 1 and 50 nm, their synthesis, characterization and applications in adsorption, catalysis, bio-related processes, environmental cleanup and nanotechnology. A unique feature of this volume is the wide variety of nanoporous materials covered, ranging from ordered silica nanostructures, silicas with incorporated organic and inorganic species, ordered nanoporous carbons and polymers, metal organic frameworks, nanostructured catalysts to nanoporous films, membranes and monoliths. This proceedings volume reflects the current trends and advances in the field of nanomaterials, which will certainly continue to attract the attention of materials scientists around the globe. It will therefore be a valuable reference for materials scientists, chemists and physicists working in academia, national and industrial laboratories. Sample Chapter(s). Chapter 1: New Routes for Improving Hydrothermal Stability of Ordered Mesoporous Materials and Synthesis of Mesoporous Zeolites (497 KB). Contents: Mesoporous Silicas; Si-Containing Mesoporous Inorganic Frameworks; Mesoporous Zeolites; Mesoporous Organosilicas; Non-siliceous Inorganic Nanomaterials; Porous Polymers and Polymer/Inorganic Nanocomposites; Mesoporous Carbons; Nanoparticles Assembly; Adsorption on Nanostructured Materials; Nanostructured Catalysts; Catalytic Applications of Nanoporous Materials; Environmental Applications of Nanoporous Materials; Bio-related Applications of Mesoporous Materials. Readership: Graduate students, academics and researchers in the field of nanoporous materials."
Author: Abdelhamid Sayari
Publisher: World Scientific
ISBN: 9814472301
Category : Technology & Engineering
Languages : en
Pages : 757
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Book Description
This proceedings volume contains selected and peer-reviewed original oral and poster contributions to be presented at the 5th International Symposium on Nanoporous Materials, Vancouver, Canada, May 25-28, 2008. It presents recent scientific advances in the area of nanoporous materials, especially those with ordered pores of sizes between 1 and 50 nm, their synthesis, characterization and applications in adsorption, catalysis, bio-related processes, environmental cleanup and nanotechnology. A unique feature of this volume is the wide variety of nanoporous materials covered, ranging from ordered silica nanostructures, silicas with incorporated organic and inorganic species, ordered nanoporous carbons and polymers, metal organic frameworks, nanostructured catalysts to nanoporous films, membranes and monoliths. This proceedings volume reflects the current trends and advances in the field of nanomaterials, which will certainly continue to attract the attention of materials scientists around the globe. It will therefore be a valuable reference for materials scientists, chemists and physicists working in academia, national and industrial laboratories.
Author: Alufelwi Maxwell Tshavhungwe
Publisher:
ISBN:
Category : Organic compounds
Languages : en
Pages : 484
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Book Description
