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A Three-Center Tight-Binding Potential Model for C and Si
A tight-binding potential model which goes beyond the Slater-Koster two-center approximation and includes explicit three-center and crystal field expressions is presented. Using carbon and silicon as examples, we show that various bulk structures, surface reconstructions, and the structures of clusters and liquids of C and Si can be well described by th...
http://www.polymer.cnt//ss/grouplu/publicationsshow_8113.html |
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Dependence of Active Center Distribution on Monomer in Heterogeneous Ziegler-Natta Catalysts
In this work, we synthesized a series of polymers through homopolymerization of ethylene or 1-hexene and their copolymerization using three types of catalysts: a simple TiCl4/MgCl2 catalyst prepared through reaction of MgCl2.EtOH adduct&nbs...
http://www.polymer.cn/research/dis_info8826 |
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Dependence of Active Center Distribution on Monomer in Heterogeneous Ziegler-Natta Catalysts
In this work, we synthesized a series of polymers through homopolymerization of ethylene or 1-hexene and their copolymerization using three types of catalysts: a simple TiCl4/MgCl2 catalyst prepared through reaction of MgCl2.EtOH adduct&nbs...
http://www.polymer.cn/research/dis_info8826 |
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Synthesis and thermal properties of novel difunctional chiral and achiral benzoxazines with double chiral center
Polybenzoxazines, as a class of thermosetting phenolic resins formed by the thermal ring-opening of the corresponding benzoxazines monomers without any catalyst, have demonstrated various attractive properties such as high thermal stability, hig...
http://www.polymer.cn/research/dis_info16638 |
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Synthesis and thermal properties of novel difunctional chiral and achiral benzoxazines with double chiral center
Polybenzoxazines, as a class of thermosetting phenolic resins formed by the thermal ring-opening of the corresponding benzoxazines monomers without any catalyst, have demonstrated various attractive properties such as high thermal stability, hig...
http://www.polymer.cn/research/dis_info16638 |
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Bipolar Alq3-based complexes: Effect of hole-transporting substituent on the properties of Alq3-center
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http://www.polymer.cnt//ss/yangchaolong/publicationsshow_13169.html |
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Novel synthesis and high visible light photocatalytic activity of SnS(2) nanoflakes from SnCl(2)center dot 2H(2)O and S powders
A novel method based on heating the mixture of SnCl2·2H2O and excess S powders in air at 200–240 °C for 0–10 h (t = 0 h, that is, the heating of the reactants was stopped immediately once temperature reached the designed degree), coupled with a subsequent washing treatment, was proposed for the synthesis of SnS2 nanoflakes. X-ray diffraction, transmission el...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10636.html |
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Synthesis and photoluminescence of In2O3 nanocrystals and submicron crystals from InCl3 center dot 4H2O and thiourea
Two routes have been proposed for the synthesis of In2O3 powders from InCl3?4H2O and thiourea. One route involved a two-step procedure (that is, firstly, In2S3 clusters constructed with mainly nanoflakes were synthesized by heating the mixture of InCl3?4H2O and thiourea in air from room temperature to 200 °C, coupled with a subsequent washing treatment; secondly, In2O3 was obt...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10635.html |
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Low temperature synthesis and optical properties of CaTiO(3) nanoparticles from Ca(NO(3))(2)center dot 4H(2)O and TiO(2) nanocrystals
Choosing low-melting-point Ca(NO3)2·4H2O and high-reactive-activity TiO2 nanocrystals as the raw materials, a simple and cost-effective route was developed for the synthesis of CaTiO3 nanoparticles at 600 °C, which is much lower than that (about 1350 °C) used in the conventional solid state reaction methods. X-ray diffraction, energy dispersive X-ray spectroscopy and f...
http://www.polymer.cnt//ss/zhangming/publicationsshow_10601.html |
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A novel amorphous oligo(phenylenevinylene) dimer with a biphenyl linkage center and fluorene end groups for electroluminescent devices
A new type of oligo(phenylenevinylene) dimer, 2,5,2′,5′-tetra(9,9′-dihexylfluorenyl)biphenyl (TFB), with a biphenyl linkage center and four fluorene end groups, has been synthesized by the Wittig reaction. The full characterization of its structure and optical properties, as well as the performance of its electroluminescent devices are presented. TFB shows strong blue fluorescence b...
http://www.polymer.cnt//ss/ciacmao/publicationsshow_6132.html |
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