PhD in Physical Organic Chemistry Supervisors: Prof. Mordecai Rabinovitz and Prof. Itamar Willner Phone: +97226586311 Address: Institute of Chemistry Edmond J. Safra Campus Givat Ram, Jerusalem Israel 9190401
Ultraconfined block copolymer films present nonbulk structures that are highly sensitive to film ... more Ultraconfined block copolymer films present nonbulk structures that are highly sensitive to film thickness and are strongly influenced by the wetting properties of the substrate. Here, we describe ...
Quasi‐block copolymers (q‐BCPs) are block copolymers consisting of conventional and supramolecula... more Quasi‐block copolymers (q‐BCPs) are block copolymers consisting of conventional and supramolecular blocks, in which the conventional block is end‐terminated by a functionality that interacts with the supramolecular monomer (a “chain stopper” functionality). A new design of q‐BCPs based on a general polymeric chain stopper, which consists of polystyrene end‐terminated with a sulfonate group (PS‐SO3Li), is described. Through viscosity measurements and a detailed diffusion‐ordered NMR spectroscopy study, it is shown that PS‐SO3Li can effectively cap two types of model supramolecular monomers to form q‐BCPs in solution. Furthermore, differential scanning calorimetry data and structural characterization of thin films by scanning force microscopy suggests the existence of the q‐BCP architecture in the melt. The new design considerably simplifies the synthesis of polymeric chain stoppers; thus promoting the utilization of q‐BCPs as smart, nanostructured materials.
Ultraconfined block copolymer films present nonbulk structures that are highly sensitive to film ... more Ultraconfined block copolymer films present nonbulk structures that are highly sensitive to film thickness and are strongly influenced by the wetting properties of the substrate. Here, we describe ...
Quasi‐block copolymers (q‐BCPs) are block copolymers consisting of conventional and supramolecula... more Quasi‐block copolymers (q‐BCPs) are block copolymers consisting of conventional and supramolecular blocks, in which the conventional block is end‐terminated by a functionality that interacts with the supramolecular monomer (a “chain stopper” functionality). A new design of q‐BCPs based on a general polymeric chain stopper, which consists of polystyrene end‐terminated with a sulfonate group (PS‐SO3Li), is described. Through viscosity measurements and a detailed diffusion‐ordered NMR spectroscopy study, it is shown that PS‐SO3Li can effectively cap two types of model supramolecular monomers to form q‐BCPs in solution. Furthermore, differential scanning calorimetry data and structural characterization of thin films by scanning force microscopy suggests the existence of the q‐BCP architecture in the melt. The new design considerably simplifies the synthesis of polymeric chain stoppers; thus promoting the utilization of q‐BCPs as smart, nanostructured materials.
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Papers by Roy Shenhar