WorldCat Identities

Fréchet, Jean M. J.

Overview
Works: 19 works in 53 publications in 2 languages and 756 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Author
Classifications: TK7871.15.P6, 621.38173
Publication Timeline
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Most widely held works by Jean M. J Fréchet
Dendrimers and other dendritic polymers by Donald A Tomalia( Book )

17 editions published between 2001 and 2002 in English and held by 190 WorldCat member libraries worldwide

Dendrimers have been referred to as "the polymers of the 21st Century." These macromolecules are characterized by "branch upon branch" architecture and are now rapidly expanding the general fields of polymer science and chemistry. Dendritic polymers are the most recently discovered, fourth major architectural class of macromolecules. They represent a fourth major class after traditional types which include (I) linear, (II) cross-linked and (III) branched architectures. Dendrimers and Other Dendritic Polymers provides a detailed insight into dendritic polymers, and discusses all the known subclasses of dendritic polymers in addition to dendrons and dendrimers, including hyperbranched polymers, dendrigrafts and megamers. Dendrimers possess unique structures and exhibit properties that differ dramatically from those of the more traditional polymer types. These features have contributed to multi-disciplinary applications and now many major chemical companies are investing extensively in dendritic polymer research as they are investigating their broad commercial applications. They are currently being developed for use in the pharmaceutical and chemical industries with identified applications in areas as diverse as: drug delivery, cancer therapy, nano-pharmaceuticals, nano-diagnostics, nanolithography, coatings and adhesives, separation technology and catalysis. With contributions from many of the leading scientists in the field of dendritic polymers, this comprehensive volume provides:*an overview of developments in the field of dendrimers, with a comparison of properties and synthesis to traditional polymers*discussion of commercial and potential applications for dendritic polymers*an identification of the key trends and analytical perspectives in dendrimer research *practical procedures for the laboratory preparation of some of the more commonly used dendrimer families. This will be essential reading for all chemists, polymer/material scientists, plastics engineers, nanotechnologists and postgraduate polymer scientists and engineers.in disea
Proceedings of the Eighth Saudi Students Conference in the UK by Saudi Students Conference( Book )

3 editions published in 2016 in English and held by 9 WorldCat member libraries worldwide

"This annual proceedings publishes peer-reviewed scholarly research conducted by postgraduate and early career researchers within the context of Saudi Arabia. It covers wide-ranging topics from diverse fields including humanities, social sciences and natural and applied sciences. The topics reflect the advancing knowledge, research trends, and scholarly debates across the entire spectrum of fields. The readership is broad and the topics appeal to both specialists and non-specialists. The contributions in the proceedings are thematised to reflect the cross-disciplinary nature of the conference. These are categorised as Medical and Health Sciences, Engineering and Applied Sciences, Natural Sciences, Law and Management Studies, Humanities and Social Sciences, and Arts"--Provided by publisher
U.S.-Japan seminar on polymer synthesis by Berkeley, Calif.) US Japan Seminar on Polymer Synthesis (1999( Book )

3 editions published in 2000 in English and held by 7 WorldCat member libraries worldwide

Polymer properties : meeting high technology challenges, part I( Visual )

1 edition published in 1989 in English and held by 3 WorldCat member libraries worldwide

Three polymer experts present the key aspects of applications of radiation-sensitive polymers, nonlinear optical properties of polymers, and elastomers
Solid phase synthesis of oligosaccharides by Jean M. J Fréchet( )

3 editions published in 1972 in English and held by 2 WorldCat member libraries worldwide

Séverine by Anne Marie Beaufort d'Hautpoul( Book )

1 edition published in 1808 in French and held by 1 WorldCat member library worldwide

Chemical synthesis of a stereoregular linear mannan poly-[alpha]-(1-6[beta]) - anhydro-D-̳mannopyranose by Jean M. J Fréchet( )

1 edition published in 1969 in English and held by 1 WorldCat member library worldwide

Synthesis and applications of organic polymers as supports and protecting groups by Jean M. J Fréchet( )

1 edition published in 1981 in English and held by 1 WorldCat member library worldwide

Resist Materials Design: Base-Catalyzed Chemical Amplification( Book )

2 editions published between 1993 and 1994 in English and held by 1 WorldCat member library worldwide

Many chemically amplified resists that function on the basis of acid catalysis of thermolytic actions have been described as well as systems that function on the basis of free radical chain reactions. But there have been very few reports on the use of base catalysis, of chemical transformations in resist materials. We describe here our initial results on base catalyzed chemically amplified deep-UV photoresists. Photogenerated amines were used as catalysts for the decarboxylation of carboxylic acids. Two approaches to building resists around this chemistry were investigated. (1) Decarboxylation of a low molecular weight carboxylic acid led to base induced dissolution inhibition of a phenolic polymer giving negative tone images. (2) A carboxylic acid polymer was synthesized which also is susceptible towards base catalyzed decarboxylation. Wet development of this resist material gives negative tone images. Site specific gas-phase silylation of the carboxylic acid allows the use of this material in a positive tone dry develop process. A 0.5 micrometers line-space pattern obtained by this dry develop process illustrates the potential of base-catalyzed chemical amplification. Resist, Photogenerated base, Chemical amplification, Microelectronics, Imaging material
Chemistry for the 21st century : towards molecular machines and namometer scale devices by Jean M. J Fréchet( Visual )

1 edition published in 1999 in English and held by 1 WorldCat member library worldwide

Dedicated to Professor R. Bruce Merrifield on the occasion of his Nobel prize in chemistry : special issue( Book )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

The Photogeneration of Polymeric Amines: Synthesis and Photocrosslinking of Copolymers Containing Photoactive Carbamate Pendant Groups( )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

Two families of copolymers containing 4-(2-NITROBENZYLOXY)-CARBAMOYL- styrene as the photoactive component, with styrene or methyl methacrylate as the other component are described. The polymers are prepared by chemical modification of copolymers of 4-amino-styrene with styrene and methyl methacrylate, respectively, using 2-nitrobenzyl chloroformate. The photoactive carbamate groups of both copoly can be removed by irradiation with UV light below 320nm. Quantum yield measurements and comparisons with small molecule model compounds confirm that attachment to the polymer has no effect on the photolability of the 2-nitrobenzyl carbamoyl protecting group. Quantum yield values near 0.10 also compare favorably with those obtained for related small molecules. The photoactive polymers have been tested successfully in the UV induced crosslinking of formulations containing epoxy groups
Controlled Radical Polymerization with Dendrimers Containing Stable Radicals( )

1 edition published in 1996 in English and held by 0 WorldCat member libraries worldwide

TEMPO-based stable radicals were attached to dendrimers of variable size and used to control radical polymerization of styrene, vinyl acetate and (meth)acrylates. Thermal polymerization of styrene with (G-2)-TEMPO proceeded in a similar but not better controlled manner than with TEMPO alone. In the polymerization of styrene initiated with BPO, the kinetics and the molecular weigh/conversion relations showed the same tendency as with TEMPO, though the polydispersity was higher than in the absence of dendrimers. This indicates that homolytic cleavage occurs at the reaction temperature, monomer can diffuse inside the cavity of dendrimer, and polymer is at least partially compatible with dendrimer. Model reactions indicate that the higher observed polydispersities could not be ascribed to transfer to benzyl hydrogen atoms. Therefore, the higher polydispersities could originate from the self-initiated polymerization of styrene outside of the dendrimers as well as the slow exchange of these chains with chains attached to dendrimers. To evaluate the effect of self-initiation, vinyl acetate, methyl methacrylate, and n-butyl acrylate were used, however, the resulting polymers were incompatible with the dendrimers. The growing chains are easily released from the cavity of the dendrimers into solution, and their return into the cavities of the dendrimers was not fast enough to control the polymerization. The results of the polymerization in decalin solution indicate that polymerization of these monomers is better controlled but only at the early stages of the polymerizations. The subsequent precipitation of polymers attached to the dendrimers prevent further polymerization
Large-Scale Integration of Solid-State Microfluidic Valves With No Moving Parts( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

This research concerns the development of a new kind of revolutionary design, solid-state microvalves that will permit the realization of complex microfluidic systems with arrays of hundreds of flow-control devices. Microfluidic systems have widespread applications in the implementation of immunological and genetic assays of both commercial and DoD interest. While fluidic capillary microchips made of glass, silicon, and plastic have been realized, their practical use has been so far confined to simple systems with very few assay steps such as PCR followed by electrophoresis or hybridization analyses. The scope of the project is focused on the elements necessary to demonstrate the feasibility of a simple, integratable, single element microvalves with no moving parts for microfluidic systems. A major goal of this program is the development of thin film active (and passive) polymer plugs that can be micromachined and integrated with microfluidic substrates to implement these plug valve devices
Novel Chemically Amplified Dry-Developing Imaging Materials for High Resolution Microlithography( )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

Several new polymers, copolymers, and polyfunctional crosslinkers that can be used to formulate chemically amplified resist materials have been prepared, characterized, and tested in combination with suitable photoactive compounds. All of the materials operate on the basis of acid catalyzed processes involving alkylation, dehydration, or isomarization reactions. Sensitivities below 0.1 mJ/cm2 have been measured with deep-UV irradiation, while most of the materials also operate very effectively with E-beam or X-ray exposure. The resist materials are useful in dry development and top-surface imaging processes. Depending on the nature of the matrix polymer and the design of the resist material, both positive and negative tone images can be obtained. Dry development using an oxygen plasma can be achieved following selective silylation of the resists after exposure and post-baking. those areas of the films that are silylated resist etching by the oxygen plasma providing access to high resolution images that also benefit from the high sensitivity of the chemically amplified resists
Wiley series in polymer science( )

in English and held by 0 WorldCat member libraries worldwide

Photogenerated Base as Catalyst for Imidization Reactions: Design of Photosensitive Polyimides( )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

The photogeneration of free amines or diamines from soluble organic precursors such as photoactive 2-nitrobenzyl carbamates is useful for the imidization of polymers containing amic acid or amic ester groups as part of their main-chain or their side-chain. The base-catalyzed reaction occurs at lower temperatures than the noncatalyzed thermal process and is applicable to the patterning of thin film coatings
Photogenerated Amines in the Design of Imaging Materials: The Radiation-induced Imidization of Functionalized Polystyrenes Bearing Amide-ester Side Chains by Jean M. J Fréchet( Book )

2 editions published in 1995 in English and held by 0 WorldCat member libraries worldwide

The use of photogenerated base in polymer modification processes has been investigated with the study of the amine catalyzed intramolecular imidization of reactive functional groups attached to a polystyrene matrix. The monomers are prepared by reaction of 4-hydroxystyrene with suitable anhydrides such as phthalic anhydride or the corresponding diacid chlorides, followed by amidation with hexamethyldisilazane. Following their free-radical polymerization, the functionalized polystyrenes have been tested in imaging experiments involving in situ photogeneration of amine from a photoactive carbamate precursor followed by low temperature imidization. The amine catalyzed imidization occurs as a much lower temperature than the uncatalyzed process thereby allowing photopatterning. Because the imidization process results in the formation of aqueous base soluble by-products, image development may be accomplished used standard water-based developers. While the new materials themselves can be used as resists, the concepts demonstrated in this study can be used to design novel photopatternable imaging and packaging materials for microelectronics. (jg)
 
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Dendrimers and other dendritic polymers
Alternative Names
Frechet, J. M.

Fréchet, J.M.J.

Fréchet, J. M. J. (Jean M. J.)

Jean Fréchet Amerikaans scheikundige

Jean Fréchet chimico statunitense

Jean Fréchet französisch-US-amerikanischer Chemiker

Jean Fréchet French chemist

Фреше, Жан

ジャン・フレシェ

让·弗雷谢

Languages
English (52)

French (1)

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