Cornell University

Northwestern University

University of Minnesota

Georgia Tech Research Corporation

William R Dichtel

Juan Hinestroza

Alaaeddin Alsbaiee

Yuhan Ling

Damian Helbling

Leilei Xiao

Diego Alzate-Sanchez

Brian J Smith

David Joseph Fortman

Deepti Gopalakrishnan

Daylan T Sheppard

Seth R Marder

Jiwoong Park

Fernando Javier Uribe-Romo

Stephen Barlow

Samik Jhulki

Mark Philip Levendorf

Christopher John Ellison

Arthur R Woll

Hasan Arslan

John Colson

Eric Spitler

Arnab Mukherjee

Kailong Jin

Austin M Evans

Disclosed herein are sensors including a covalent organic framework (COF). The COF includes tautomerically active subunits (TAS) capable of reversible iminol-to-ketoenamine tautomerism between a first tautomer and a second tautomer and linking groups. Methods of detecting analytes with the sensors are also disclosed.

Tautomeric sensing using a covalent organic framework

Disclosed herein are methods for reprocessing polyurethane compositions such as polyurethane foams. The method comprises introducing a polyurethane composition into a compounding device, heating the polyurethane composition to an effective bond-exchange temperature, and compounding the polyurethane composition for an effective bond-exchange time.

Urethane exchange catalysts and methods for reprocessing cross-linked polyurethane foams

Disclosed herein are polyurethane compositions and methods for reprocessing cross-linked polyurethane compositions. The polyurethane composition comprises a network polymer and a polyurethane exchange catalyst permeated within the network polymer. The network polymer comprises a dynamic network formed from an isocyanate constitutional unit and a second constitution unit having a hydroxyl group capable of reacting with an isocyanate group of the isocyanate constitutional unit to form a urethane bond. The catalyst comprises a metal atom and a ligand coordinated to the metal atom.

Urethane exchange catalysts and methods for reprocessing cross-linked polyurethanes

Cross-linked polymer networks that are at least partially conjugated (e.g., phenylene vinylene polymer networks). The cross-linked polymer networks may be thin-films disposed on a substrate. The cross-linked polymer network may be covalently bonded to the substrate. The cross-linked polymer networks can be used, for example, in methods of detecting explosives (e.g., RDX (cyclotrimethylenetrinitramine)) and degradation products thereof.

Cross-linked polymer networks and methods of making and using same

A nucleophilic substitution reaction to crosslink cyclodextrin (CD) polymer with rigid aromatic groups, providing a high surface area, mesoporous CD-containing polymers (P-CDPs). The P-CDPs can be used for removing organic contaminants from water. By encapsulating pollutants to form well-defined host-guest complexes with complementary selectivities to activated carbon (AC) sorbents. The P-CDPs can rapidly sequester pharmaceuticals, pesticides, and other organic micropollutants, achieving equilibrium binding capacity in seconds with adsorption rate constants 15-200 times greater than ACs and nonporous CD sorbents. The CD polymer can be regenerated several times, through a room temperature washing procedure, with no loss in performance.

Porous cyclodextrin polymeric materials and methods of making and using same

Multilayer structures comprising a covalent organic framework (COF) film in contact with a polyaromatic carbon (PAC) film. The multilayer structures can be made by combining precursor compounds in the presence of a PAC film. The PAC film can be for example, a single layer graphene film. The multilayer structures can be used in a variety of applications such as solar cells, flexible displays, lighting devices, RFID tags, sensors, photoreceptors, batteries, capacitors, gas-storage devices, and gas-separation devices.

Covalent organic framework films, and methods of making and uses of same

Provided are graphene nanoribbons (GNRs), methods of making GNRs, and uses of the GNRs. The methods can provide control over GNR parameters such as, for example, length, width, and edge composition (e.g., edge functional groups). The methods are based on a metal catalyzed cycloaddition reaction at the carbon-carbon triple bonds of a poly(phenylene ethynylene) polymer. The GNRs can be used in devices such a microelectronic devices.

Graphene nanoribbons derived from poly(phenylene ethynylene) polymer, methods of making same, and uses thereof

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Wilmette, IL, United States of America

William R Dichtel