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Ultraheavy precision polymers

Controlled photoenzymatic RAFT polymerization of nonconjugated polymers


An environmentally friendly and sustainable synthesis of "heavyweight" polymers with very narrow molecular weight distributions is an important concept in modern polymer chemistry. Thanks to a new photoenzymatic process, Chinese researchers have been able to increase the range of possible ...


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Radical approach for brighter LEDs


Scientists have discovered that semiconducting molecules with unpaired electrons, termed 'radicals' can be used to fabricate very efficient organic-light-emitting diodes (OLEDs), exploiting their quantum mechanical 'spin' property to overcome efficiency limitations for traditional, non-radical ...


Porous salts for fuel cells

Organic salts with high proton conductivity


Scientists have developed a new class of crystalline porous organic salts with high proton conductivity for applications such as proton-exchange membranes for fuel cells. Polar channels that contain water play a critical role in proton conduction. At about 60 °C and high humidity, their proton ...


MOF-polymer composite membranes to enhance proton conductivity in fuel cells


Nafion (a perfluorosulfonic acid membrane) is widely used in fuel cells to conduct protons, but Nafion membranes are prone to rapid dehydration at low humidity, which results in a loss of conductivity. To overcome this problem, scientists in China have made a metal-organic framework (MOF) ...


Zeolites for efficient oil-water separation


Scientists in China have used zeolite-coated mesh films for gravity-driven oil-water separation. The superhydrophilicity and underwater superoleophobicity of the zeolite’s surface allow the highly efficient separation of various oils. Unlike other oil-water separation membranes based on ...


Graphene Rainbow

Superhydrophobic graphene surfaces mimic the properties of butterfly wings and rose petals


Butterfly wings, rose petals and many other natural surfaces repell water strongly; they are superhydrophobic. Such surfaces have a hierarchical structure on the micrometer or nanometer scale. Their attractive properties and spectacular iridescent colors have triggered a group led by Hong-Bo Sun ...


Electroluminescence devices


A highly efficient, low driving-voltage, phosphorescent material for electroluminescence devices has been developed by scientists in Asia. Zhaomin Hou from RIKEN Advanced Science Institute, Japan and colleagues from Jilin University, China, have synthesised an iridium complex with highly ...


Felcht wird "Honorary Professor" der chinesischen Universität Jilin


Der Degussa Vorstandsvorsitzende Prof. Utz-Hellmuth Felcht (59) hat von der nordchinesischen Universität Jilin, Changchun, den Titel "Honorary Professor" erhalten. Damit würdigt die Hochschule die herausragenden persönlichen Verdienste von Felcht auf dem Gebiet der ...


Degussa acquires additional know-how in manufacturing polyaryl ether ketones


In a move to further consolidate its expertise in the area of high-temperature polymers, Degussa AG, Dusseldorf, is acquiring all the know-how and patents of Ticona GmbH, Kelsterbach, in the field of polyaryl ether ketones. Patents and know-how for the manufacture and use of these polymers had ...


China: New Joint venture for the production of high performance polymer PEEK


Representatives of Degussa AG of Dusseldorf, Germany, and Jilin University of north China signed an agreement in Dusseldorf concerning collaboration in a joint venture. This marks the successful completion of negotiations, preceded by conclusion of a precontract in December 2004. Degussa will ...


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