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Siloxane Polymer Achieves Record Stretchiness

Chemists working at Pennsylvania-based materials supplier Gelest have created a siloxane polymer that is so stretchy, two yards of the material could extend across the length of a football field. Gelest’s manager of silicone R&D, Jonathan Goff, publicly unveiled the polymer Tuesday at the ACS national meeting in Boston during a session hosted by the… Read more »

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#ACSBoston In Review

Despite the unusual heat and humidity that turned Boston into a sweaty mess, nearly 14,000 chemists gathered in the historical city this week to provide a refreshing new perspective on how innovation has changed the world. Hosting the 250th celebration of the American Chemical Society national meeting and exposition, Boston—being the birthplace of Benjamin Franklin—was… Read more »

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MOF Phosphor Improves On Light-Emitting Diodes

CORRECTION: Story was updated on 8/20/2015 to correct the type of yellow phosphor used in the white LED. Light-emitting diodes are now state-of-the-art when it comes to lighting. Yet scientists are still designing new ways to improve on the quality of light that LEDs produce and to reduce their cost and make them environmentally friendlier…. Read more »

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Automated Flow Technique Makes Length- And Sequence-Specific Polymers

Traditional synthetic polymers contain a distribution of chain lengths and monomer sequences. For applications such as molecular electronics, however, scientists want to create polymers of a specific sequence and length—a difficult task. Frank A. Leibfarth, Jeremiah Johnson, and Timothy Jamison at MIT have now developed Flow-IEG (flow synthesis and iterative exponential growth), a semi-automated coupling… Read more »

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A pH-Sensitive Polymer Could Lead To Long-Term Drug Delivery Devices

A new family of polymers could help fight obesity and antibiotic resistance just by falling apart. Researchers led by Giovanni Traverso of the Massachusetts General Hospital and Robert Langer of Massachusetts Institute of Technology have synthesized hydrogels that are stable in stomach acid, but dissolve in the neutral pH of the intestines (Nat. Mater. 2015,… Read more »

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Chemists Grind Up New Crystalline Metal-Organic Framework From Amorphous Material

Grinding a crystalline metal-organic framework (MOF) material in a ball mill converts it into an amorphous structure and then into other crystal morphologies, according to research presented Tuesday at the American Chemical Society national meeting in Boston. The observation suggests researchers could use mechanochemical synthesis as a route to new MOFs. Tomislav Friščić, a chemistry… Read more »

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DNA And Protein Self-Assemble Into Biodegradable Solar Antenna

A new light-harvesting antenna complex could pave the way for making biologically based solar cells. Challa V. Kumar and his team at the University of Connecticut made the biodegradable antenna from DNA, modified bovine serum albumin (BSA), and four fluorescent dyes. Kumar reported the research Monday at the American Chemical Society national meeting in Boston… Read more »

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Sunlight Coaxes Urban Grime To Release Smog Compound

A grimy film covers the streets, statues, and buildings in our cities. This dirty chemical soup, deposited from pollution and dust, could play a previously unknown role in urban air quality, according to research presented Monday at the American Chemical Society national meeting in Boston. Chemists report that, when hit with sunlight, urban grime may… Read more »

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Bimetallic Clusters Exhibit Exceptional Catalytic Ability

Minuscule metal clusters consisting of just a few atoms of two types of metals can catalyze chemical reactions with extraordinary selectivity if the clusters are supported on a solid and kept isolated from one another. Those findings, presented Sunday at the American Chemical Society national meeting in Boston, suggest ways to prepare highly effective industrial… Read more »

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Porous Polymer Could Spot Traumatic Brain Injuries

The forces from an explosive blast or a head-on tackle can shake a person’s head, causing damage that might trigger long-term neurodegeneration. To help doctors determine whether a patient might suffer from this type of traumatic brain injury, materials scientists have developed a thin polymeric film that changes color when struck with forces similar to… Read more »