The Hong Kong University of Science and Technology

Han Peng

Ben Zhong Tang

Qunhui Sun

Kaitian Xu

Jingdong Luo

Wing Yip Lam

Xixiang Zhang

Nai-teng Yu

Shuk-mei Leung

Ben-zhong Tang

Xuan-zheng Wu

John A K Cha

A method for limiting the transmission of light through a material is disclosed. In the method, a layer composed of a hyperbranched polymer formed via a copolycyclotrimerization reaction is interposed between a light source and the material. Also provided is a method for emitting light comprising exciting the hyperbranched polymer. In addition, methods for limiting the transmission of light and for emitting light using hyperbranched polymers formed by homopolycyclotrimerization reactions are disclosed. A new class of hyperbranched polymers produced by copolycyclotrimerization is also disclosed.

Hyperbranched polymers

Hyperbranched organometallic polymers, including poly &lsqb;1,1&prime;-ferrocenylenesilynes&rsqb;, poly &lsqb;1,1&prime;-ferrocenylene-(alkyl)silynes&rsqb;, poly &lsqb;1,1&prime;-ferrocenylene(alkenyl)silynes&rsqb; and poly &lsqb;1,1&prime;-ferrocenylene(aromatic)silynes&rsqb;, are useful as precursors to certain ceramic materials. Processes for the preparation of such polymers and the preparation of ceramic materials from such polymers are described, as are the resulting ceramic materials and their use as ferromagnetic materials and electrically conductive materials.

Synthesis of hyperbranched organometallic polymers and their use as precursors to advanced ceramic materials

Optical glasses and polymers are described that incorporate homogeneously dispersed fullerene molecules. The resultant materials may be used as optical filters, the cut-off frequency being easily adjustable by changing the fullerene content. To prepare glasses fullerene molecules are firstly functionalized by amination prior to being incorporated into a sol-gel process to prepare the glass. To prepare polymers a pre-existing polymer may be subject to fullerenation, or fullerene may be copolymerized with a selected monomer.

Fullerene-containing optical materials with novel light transmission

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Hong Kong, China

Han Peng