The structure and properties of PEDOT synthesized by template-free solution method

In this study, a simple one-step template-free solution method was developed for the preparation of poly(3,4-ethylenedioxythiophene) (PEDOTs) with different morphologies by adjusting various ratios of oxidant (FeCl₃·6H₂O) to monomer (3,4-ethylenedioxythiophene (EDOT)). The results from structural analysis showed that the structure of PEDOT was strongly affected by the oxidant/monomer ratio, and the polymerization degree, conjugation length, doping level, and crystallinity of PEDOT decreased with increasing of the oxidant/monomer ratio. The morphological analysis showed that PEDOT prepared from an oxidant/monomer ratio of 3:1 displayed a special coral-like morphology, and the branches of ‘coral’ would adjoin or grow together with increasing content of oxidant in the reaction medium; consequently, the morphology of PEDOT changed from coral to sheets (at an oxidant/monomer ratio of 9:1). The electrochemical analysis proved that the PEDOT prepared from an oxidant/monomer ratio of 3:1 had the lowest resistance and the highest specific capacitances (174 F/g) at a current density of 1 A/g with a capacity retention rate of 74% over 1,500 cycles, which indicated that the PEDOT with a coral-like morphology could be applied as a promising electrode material for supercapacitors.     

尾式5-{对-[2-(2-甲乙基)-1,3-二噁烷]苯氧基}-10,15,20- 三苯基卟啉及其金属配合物的合成与表征

2-(2-溴-2-甲乙基)-1,3-二噁烷与存在无水K2CO3的DMF溶剂中的5-(4-羟基苯基)-10,15,20-三苯基卟啉反应,合成出了一种新型卟啉5-{对-[2-(2-甲乙基)-1,3-二噁烷]苯氧基}-10,15,20-三苯基卟啉,并据此制得了锌、钯、钌配合物.对化合物的结构分别用UV-Vis、IR、1HNMR、元素分析等手段进行了表征.     

The study on the application of solid-state method for synthesizing the polyaniline/noble metal (Au or Pt) hybrid materials

The solid-state method was applied for synthesizing polyaniline (PANI)/noble metal hybrid materials with the presence of HAuCl₄·4H₂O or H₂PtCl₆·6H₂O in the reaction medium. The structure, morphology, and electrochemical activity of the composites were characterized by Fourier transform infrared (FTIR) spectra, UV-visible (vis) absorption spectra, energy dispersive spectrum (EDS), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and cyclic voltammetry. The results from FTIR and UV-vis spectra showed that the oxidation degree and doping level of the PANI in composites can be influenced by HAuCl₄·4H₂O and H₂PtCl₆·6H₂O. The EDS data demonstrated that the composites contain a certain amount of Au (or Pt) element. XRD analysis indicated the presence of crystalline-state Au particles in PANI matrix prepared from the presence of HAuCl₄·4H₂O and revealed that the H₂PtCl₆·6H₂O cannot be converted into metal Pt. The TEM and SEM images implied that the Au particles did exist in the polymer matrix with the size of about 20 nm. The enzymeless H₂O₂ sensor constructed with PANI/Au composite from the presence of HAuCl₄·4H₂O showed a short response time (within 5 s) and displayed an excellent performance in wide linear range.     

面向韵律层边界自动划分的维吾尔语词性自动标注技术研究

以语音合成系统文本分析模块中的韵律边界自动划分技术为背景,重点研究了维吾尔语词性自动标注技术:首先根据应用领域的特点确定词性的种类及其判定规则,筛选文本句子并对其进行手动词性标注,然后通过统计获得了词性概率表和词性对照表,最后采用基于HMM模型的二元文法来实现维吾尔语词性自动标注。在实验中,为了验证算法的有效性,筛选了10000条句子作为训练样本,另选用500条句子作为测试样本。实验结果表明,该研究思路的可行性和有效性。     

基于层次模型的图像全局运动鲁棒估计技术

为了估计与补偿图像快速全局运动,研究了一种基于层次模型的处理方法,即首先把原始图像序列用亚采样的办法划分成具有金字塔式分辨率的多个子图像,使得每一个子图像运动相对小些,然后在每一个子图像中估计出传感器或摄像机的运动模型参数。通过对所有子图像的运动参数进行加权运算,得到原图像的运动参数。在估计传感器运动模型参数时,采用了回归技术：它首先估计局部运动,然后在最小二乘估计意义下,用局部信息来估计全局运动。在估计局部运动时,为去除奇异点,提出了一种叠代排除法。这种技术具有计算量少、实现简单、性能可靠等优点。     

混合策略的维吾尔语名词词干提取系统

通过对维吾尔语名词形态结构进行研究,构造了名词有限状态自动机（FSM）;针对自动机的缺陷使用最大熵模型给有限状态自动机加入了歧义词缀识别能力,根据维吾尔语的元音和谐特点,建立了基于规则和信道噪声模型的元音和谐处理方法。有机地结合以上三种方法构造出了基于规则和统计的名词词干提取方法。为了有效利用现有的资源,提高系统的性能,把基于词典的词干提取方法与规则和统计结合的名词词干提取方法相结合,从而开发出多种策略相结合的维吾尔语名词词干提取系统。该系统具有较强的鲁棒性,准确率保持95%以上。     

5,10,15-三苯基-20-{间-[2-(5,10,15-三苯基-20-间胺苯卟啉基)]胺苯基}邻苯二甲酰基卟啉及其双金属钯配合物的合成与表征

报道了标题化合物（α-PhACBTPP）其双金属钯配合物的合成,并通过紫外可见光谱、红外光谱、核磁共振氧谱和元素分析等手段进行了结构表征。