Synthesis of Narrow Size Distributional Thiol-Functionalized

会议地点：中国天津[英文文摘]A number of thiol-functional organic microspheres are synthesized via the willisamson reactions of perchlorinated PAHs with the sodium salts of 2,5-dimercapto-1,3,4-thiadizaole, dithioglycol or Na2S·9H2O, respectively. These as-synthesized microspheres can be further functionalized as monodispersed noble metal-nanoparticle-embedded materials

Formation of buckminsterfullerene and its perchlorinated fragments by laser ablation of perchloroacenaphthylene

通讯作者地址: Zheng, LS (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 学科类别: Chemistry, Physical; Physics, Atomic, Molecular & Chemical IDS 号: 343CF ISSN: 1089-5639 DOI: 10.1021/jp0012395Perchloroacenaphthylene(C12Cl8), a perchlorinated polycyclic hydrocarbon composed of two hexagons and a pentagon, was ablated by a pulsed laser beam in a vacuum. The products created from the laser ablation were characterized by high-performance liquid chromatography coupled with atmospheric pressure chemical ionization mass spectrometry and rapid-scan ultraviolet spectrophotometric detection. Buckminsterfullerene C-60 and various perchlorinated carbon clusters have been observed among the products. The observation is helpful for understanding the formation mechanisms of fullerenes and suggests that the Pentagon Road scheme is feasible with the involvement of chlorines

From Self-Assembled Microspheres to Self-Templated Nanotubes: Morphologies and Properties of Sulfur-Bridged Fluoranthene-Based Organic Materials

The inability to controllably synthesize organic nanomaterials with desired morphologies and properties is a major barrier that prevents the scientific development of organic nanomaterials. A controllable method by means of adjusting the solubility of organic reactant has now been applied to Construct sulfur-bridged fluoranthene-based materials with desired spherical or tubular morphologies, based on the Williamson type of reaction starting from perchlorinated fluoranthene and disodium salt of 2,5-dimercapto-1,3,4-thiadizaole. A disubstituted fluoranthene derivative is proved as the basic building block for the organic materials by the data of mass spectrometry, X-ray photoelectron spectroscopy, as well as crystallography. Through quenching the intermediates toward the fluoranthene-based microspheres or nanotubes, the routes of self-assembly via a vesicle pathway and self-template from perchlorinated fluoranthene rods are proposed for the growth of the microspheres and the nanotubes, respectively. The proposed routes can be extended for synthesis of other aromatic molecular materials with controllable morphologies. On the basis of the reaction with thiol groups retained on the surface of the as-synthesized materials, functional groups or noble metal nanoparticles have been facilely linked to the fluoranthene-based materials for potential applications. Morphology-dependent properties of the fluoranthene-based materials have been demonstrated, on the basis of the experimental evidence about strong near-infrared absorption exhibiting in the microspheres but lacking in the nanotubes.The National Natural Science Foundation of China (Grant 20525103, 20721001, and 20531050) and the 973 Program (Grant 2007CB815301)

Glow discharge growth of SnO2 nano-needles from SnH4

Single crystalline SnO2 nano-needles with length up to 6-7 mum and diameter less than 300 nm are synthesized on an Au-coating porous silicon substrate from SnH4 source via a glow discharge process

Studies of the Formation of Carbon Clusters

通讯作者地址: Huang, RB (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R ChinaExperimental and theoretical studies focusing on the formation of carbon clusters are described. In the experiment on discharge in liquid chloroform, a series of perchlorinated fragments of C-60 was synthesized and a scarce amount of C-60 was detected. In the laser vaporization experiments, it was found that the production of C-60(+) and other fullerene ions could be promoted by doping chlorine-containing compounds into carbon targets. Chlorine atoms were found to play key roles of not only tying up the dangling bonds of the polycyclic carbon clusters. but also catalyzing the formation of fullerenes. The results showed that C-60 and other fullerenes are formed from growth of small carbon species and supported the "Pentagon Road" scheme of the fullerene formation mechanism. On the other hand, ab initio calculations were carried out on formation reactions of C-60 from its various perchlorinated fragments, C-60 (2m) Cl-10. The monotonically decreasing calculated energies of reactions with growing size of the fragments confirm that the formation reaction is energetically favourable

Construction of Fullerocyclobutene Derivatives through Copper(I)-Mediated Radical Annulation of C60Cl6 with Aryl Acetylenes

E-mail Addresses: [email protected] Basic Research 973 Program of China 2011CB935901 National Nature Science Foundation of China 21031004 2102106

Preparation and self-assembly of copper nanoparticles via discharge of copper rod electrodes in a surfactant solution: a combination of physical and chemical processes

地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] nanoparticles with a mean diameter of 10-15 nm were prepared and self-assembled via discharge of bulk copper rods in a cetyltrimethylammonium bromide (CTAB)/ascorbic acid solution. Ascorbic acid was used as a protective agent to prevent the nascent Cu nanoparticles from oxidation in the solution;, otherwise spindle-like Cu2O/CuO structures, with a lateral dimension of 30-50nm and length of up to 100nm, were formed in pure deionized water. The surfactant CTAB had a critical influence on self-assembly of spherical Cu nanostructures (with diameter of 700 nm-1mum). Such a low-temperature and non-vacuum method, exhibiting the characters of both physical and chemical processes, provides a versatile choice for economical preparation and assembly of various metal nanostructures. (C) 2004 Elsevier Inc. All rights reserved

Capturing the labile fullerene[50] as C50Cl10

地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China 3. Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 4. Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Mol Phys, Wuhan 430071, Peoples R China 电子邮件地址: [email protected]

英语素质教育三维促进模式实验研究

本研究是在深入了解贵州省普通初中英语课堂教学的基础上，针对其英语教学中存在的主要问题。构建了英语素质教育三维促进模式，并运用此模式进行实验。实验结果表明：三维促进模式对提高学生的英语语言能力有促进作用

THE THREE-DIMENTION PROMOTING MODEL S CONSTRUCTION AND THE EXPERIMENTAL RESEARCH OF ENGLISH QUALITY EDUCATION

本研究是在深入了解贵州省普通初中英语课堂教学的基础上 ,针对其英语教学中存在的主要问题 ,构建了英语素质教育三维促进模式 ,并运用此模式进行实验。实验结果表明 :三维促进模式对提高学生的英语语言能力有促进作