The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Christopher N. Bowman - One of the best experts on this subject based on the ideXlab platform.

  • Spatial and temporal control of thiol-michael addition via photocaged superbase in photopatterning and two-stage Polymer networks formation
    Macromolecules, 2014
    Co-Authors: Weixian Xi, Alan Aguirre-Soto, Haiyan Peng, Christopher J. Kloxin, Jeffrey W Stansbury, Christopher N. Bowman
    Abstract:

    Photochemical processes enable spatial and temporal control of reactions, which can be implemented as an accurate external control approach in both Polymer Synthesis and materials applications. “Click” reactions have also been employed as efficient tools in the same field. Herein, we combined photochemical processes and thiol-Michael “click” reactions to achieve a “photo-click” reaction that can be used in surface patterning and controlled Polymer network formation, owing to the ease of spatial and temporal control through use of photolabile amines as appropriate catalysts.

  • thiol click chemistry a multifaceted toolbox for small molecule and Polymer Synthesis
    Chemical Society Reviews, 2010
    Co-Authors: Charles E Hoyle, Andrew B Lowe, Christopher N. Bowman
    Abstract:

    The merits of thiol-click chemistry and its potential for making new forays into chemical Synthesis and materials applications are described. Since thiols react to high yields under benign conditions with a vast range of chemical species, their utility extends to a large number of applications in the chemical, biological, physical, materials and engineering fields. This critical review provides insight into emerging venues for application as well as new mechanistic understanding of this exceptional chemistry in its many forms (81 references).

Jeanfrancois Lutz - One of the best experts on this subject based on the ideXlab platform.

  • sequence control in Polymer Synthesis
    Chemical Society Reviews, 2009
    Co-Authors: Nezha Badi, Jeanfrancois Lutz
    Abstract:

    The control over comonomer sequences is barely studied in macromolecular science nowadays. This is an astonishing situation, taking into account that sequence-defined Polymers such as nucleic acids and proteins are key components of the living world. In fact, fascinating biological machines such as enzymes, transport proteins, cytochromes or sensory receptors would certainly not exist if evolution had not favored chemical pathways for controlling chirality and sequences. Thus, it seems obvious that synthetic Polymers with controlled monomer sequences have an enormous role to play in the materials science of the next centuries. The goal of this tutorial review is to shed light on this highly important but embryonic field of research. Both biological and synthetic mechanisms for controlling sequences in Polymerization processes are critically discussed herein. This state-of-the-art overview may serve as a source of inspiration for the development of new generations of synthetic macromolecules.

  • solution self assembly of tailor made macromolecular building blocks prepared by controlled radical Polymerization techniques
    Polymer International, 2006
    Co-Authors: Jeanfrancois Lutz
    Abstract:

    This review describes the preparation of colloidal aggregates (spherical micelles, cylindrical micelles, Polymer vesicles, multicompartment micelles, polyion complexes, schizophrenic micelles) using bottom-up self-assembly approaches. In particular, it focuses primarily on the self-organization of well-defined macromolecular building blocks (macrosurfactants, polysoaps, polyelectrolytes) synthesized by controlled radical Polymerization techniques such as atom transfer radical Polymerization, reversible addition fragmentation transfer Polymerization and nitroxide-mediated Polymerization. The goal of this review is to highlight that these versatile techniques of Polymer Synthesis allow the preparation of unprecedented nanostructures in dilute solutions. Copyright © 2006 Society of Chemical Industry

Christopher Barnerkowollik - One of the best experts on this subject based on the ideXlab platform.

  • star Polymer Synthesis via λ orthogonal photochemistry
    Chemical Communications, 2016
    Co-Authors: Kai Hiltebrandt, Michael Kaupp, Edgar Molle, Jan Philipp Menzel, James P Blinco, Christopher Barnerkowollik
    Abstract:

    We introduce a light induced sequence enabling λ-orthogonal star Polymer formation via an arms-first approach, based on an α,ω-functional Polymer carrying tetrazole and o-methyl benzaldehyde moieties, which upon irradiation can readily undergo cycloaddition with a trifunctional maleimide core. Depending on the wavelength, the telechelic strand can be attached to the core at either photo-reactive end.

  • star Polymer Synthesis via λ orthogonal photochemistry
    Institute for Future Environments; Science & Engineering Faculty, 2016
    Co-Authors: Kai Hiltebrandt, Michael Kaupp, Edgar Molle, Jan Philipp Menzel, James P Blinco, Christopher Barnerkowollik
    Abstract:

    We introduce a light induced sequence enabling λ-orthogonal star Polymer formation via an arms-first approach, based on an α,ω-functional Polymer carrying tetrazole and o-methyl benzaldehyde moieties, which upon irradiation can readily undergo cycloaddition with a trifunctional maleimide core. Depending on the wavelength, the telechelic strand can be attached to the core at either photo-reactive end. © 2016 The Royal Society of Chemistry.

San H Thang - One of the best experts on this subject based on the ideXlab platform.

  • Radical addition-fragmentation chemistry in Polymer Synthesis
    Polymer, 2008
    Co-Authors: Graeme Moad, Ezio Rizzardo, San H Thang
    Abstract:

    This review traces the development of addition-fragmentation chain transfer agents and related ring-opening monomers highlighting recent innovation in these areas. The major part of this review deals with reagents that give reversible addition-fragmentation chain transfer (RAFT). These reagents include dithioesters, trithiocarbonates, dithiocarbamates and xanthates. The RAFT process is a versatile method for conferring living characteristics on radical Polymerizations providing unprecedented control over molecular weight, molecular weight distribution, composition and architecture. It is suitable for most monomers Polymerizable by radical Polymerization and is robust under a wide range of reaction conditions. It provides a route to functional Polymers, cycloPolymers, gradient coPolymers, block Polymers and star Polymers. Crown Copyright © 2007.

Ulrich S Schubert - One of the best experts on this subject based on the ideXlab platform.

  • microwave assisted Polymer Synthesis recent developments in a rapidly expanding field of research
    Macromolecular Rapid Communications, 2007
    Co-Authors: Richard Hoogenboom, Ulrich S Schubert
    Abstract:

    The use of microwave irradiation has become a common heat source in organic chemistry. Inspired by this enormous success, the use of microwave irradiation is also increasingly studied for Polymerization reactions. The present review discusses developments in this rapidly growing field of research. The main areas in which the use of microwave irradiation has been explored in the recent years are step-growth Polymerizations, ring- opening Polymerizations as well as radical Polymerizations. These different areas will be addressed in detail, whereby special attention will be given to observed improvements resulting from the use of microwave irradiation as well as the occurrence of non-thermal effects.

  • microwave assisted Polymer Synthesis state of the art and future perspectives
    Macromolecular Rapid Communications, 2004
    Co-Authors: Frank Wiesbrock, Richard Hoogenboom, Ulrich S Schubert
    Abstract:

    Monomodal microwaves have overcome the safety uncertainties associated with the precedent domestic microwave ovens. After fast acceptance in inorganic and organic syntheses, Polymer chemists have also recently discovered this new kind of microwave reactor. An almost exponential increase of the number of publications in this field reflects the steadily growing interest in the use of microwave irradiation for Polymerizations. This review introduces the microwave systems and their applications in Polymer syntheses, covering step-growth and ring-opening, as well as radical Polymerization processes, in order to summarize the hitherto realized Polymerizations. Special attention is paid to the differences between microwave-assisted and conventional heating as well as the microwave effects.