复合作用分子烙印手性色谱固定相

采用复合作用力，以Ｎ－ｔｅｒｔ－Ｂｕｔｏｘｙ－Ｃｒｂｏｎｙｌ－Ｌ－Ｔｒｙｐｔｏｐｈａｎ的烙印分子合成了一种对Ｎ－ｔ－Ｂｏｃ－ＤＬ－Ｔｒｙｐｔｏｐｈａｎ具有良好手性拆分作用的高效液相色谱固定相，并初步研究了其拆分其机理。     

Electrical conduction measurement of thiol modified DNA molecules

We present a novel transport measurement of 60 base pairs of poly(dG)–poly(dC) DNA molecules. Thiol-terminated DNA molecules are chemically anchored at the surface of a Au nanoparticle and this DNA attached Au nanoparticle is self-trapped in between Au nanoelectrodes to make an electrical conduction channel. It provides an automatic electrical conduction channel consisting of electrode–DNA–nanoparticle–DNA–electrode. Due to robust bonding of thiol and Au, this transport channel is stable and reliable. The current–voltage characteristics measured from our device show a nonlinear behavior with voltage gaps comparable to previous experiment using the same molecules.     

Determination of indomethacin in urine using molecule imprinting-chemiluminescence method

A soluble Mn (IV)-formaldehyde-indomethacin chemiluminescence system was found. Using a synthesized indomethacin MIP as recognition material and soluble Mn (IV)-formaldehyde-indomethacin as detection system, a new molecule imprinted-chemiluminesence method of determination of indomethacin was established. The response range of this method was between 1.0 × 10⁻⁷ and 1.0 × 10⁻⁵ g/mL with a linear correlation coefficient of 0.994. The detection limit was 4 × 10⁻⁸ g/mL. The relative standard deviation for 5.0 × 10⁻⁷ g/mL of indomethacin solution was 3.1% (n = 7).     

具有特定能级的共轭分子

在HMO近似内,利用图形收缩定理和Heilbronner定理,研究含有特定能级的共轭分子。讨论了判定这类分子的部分能级和构造具有某些特定能级分子的各种方法,并用少数例子作了演示。     

皂荚素的表面活性及其二元体系的热力学研究

通过表面张力的测定研究了皂荚素(GS)的表面活性及其热力学性质随温度的变化.测定了皂荚素分别与十二烷基磺酸钠、十二烷基聚氧乙烯醚硫酸钠、全氟辛酸钠、十二烷基脂肪醇聚氧乙烯(9)醚、辛基酚聚氧乙烯(10)醚及十六烷基三甲基溴化铵等复配的表面张力-浓度对数关系(γ～lgc)曲线,并用二维晶格模型及正规溶液理论计算了含皂荚素的二元表面活性剂溶液表面吸附层的组成、分子相互作用参数及分子交换能.结果表明,皂荚素主要呈现非离子表面活性剂的性质,与阳离子表面活性剂复配呈微弱的离子性.复配后分子交换能均小于零,复配增效.增效顺序为GS/阳离子>GS/非离子>GS/阴离子(表面活性剂复配体系).     

分子导线聚合物在氰根阴离子检测中的应用研究

近年来,由于分子导线聚合物(MWP)具有信号放大作用,与其相关的研究备受关注,已被广泛应用于小分子、生物大分子和阴阳离子等的定量检测．其中用于阴离子检测的文献报道较少,主要是通过正负电荷静电作用原理来检测多种阴离子,选择性较差．利用MWP信号放大的优势建立新的传感模式以实现对阴离子的高选择性有效检测是目前MWP研究的难点和热点之一．     

一种基于小波变换的晚型星自动识别方法

我国正在执行的大型巡天计划(LAMOST计划),急需晚型星的自动识别系统。然而,在文献中尚未见到关于对晚型星有效自动处理方法的报道。文章旨在探索研究对晚型星自动处理的有效方法。在文章中,晚型星主要是指具有较强分子吸收带的恒星,主要包括富氧的M, L和T型星以及富碳的C星。通过研究我们发现： 对晚型星光谱进行5层小波变换后,第5层小波系数的频谱具有单峰分布的特性,其能量主要集中在以单峰为中心的特征区间内;对于其他类型的光谱,相应的频谱具有多峰分布的特点,其频谱能量比较分散,它们在晚型星特征区间内的频谱能量非常有限。基于上述发现,给出了一种基于小波变换的晚型星自动识别方法。实验表明该方法是切实可行的并且具有相当好的鲁棒性。     

热致性液晶共聚酯的拉伸流动行为

采用入口收缩流动的实验方法研究了改性PET/ 80PHB液晶共聚酯LCP80的拉伸流动行为 ,考察了拉伸速率、温度等对其拉伸粘度、Trouton比的影响 .实验结果表明 ,LCP80的入口压降值很大 ,其中由拉伸引起的入口压降是主要的 .在该文实验条件下LCP80均表现出拉伸稀化现象 ,并且Trouton比值都远大于 3 .根据流动中液晶织态结构的变化解释了实验现象 ,并对入口收缩流动的实验数据处理方法作了改进 ,比Beery的方法更为合理 ,也具有更广的适用性 .     

分子烙印聚合物吸附有机磷毒剂的研究

以有机磷毒剂沙林为烙印分子采用不同单体、交联剂有制孔剂制备了一系列分子烙印聚合物,从中筛选出了几种对沙林有很高吸附率（〉９０％）的聚合物。发现这些聚合物对沙林结构相近的其它有机磷毒剂如梭曼、塔崩及维爱克斯也有很好的吸附率。我们还考究了吸附率随时间变化的关系。     

Selective CO2 Reduction to Ethylene Mediated by Adaptive Small-molecule Engineering of Copper-based Electrocatalysts

Electrochemical CO₂ reduction reaction (CO₂RR) over Cu catalysts exhibits enormous potential for efficiently converting CO₂ to ethylene (C₂H₄). However, achieving high C₂H₄ selectivity remains a considerable challenge due to the propensity of Cu catalysts to undergo structural reconstruction during CO₂RR. Herein, we report an in situ molecule modification strategy that involves tannic acid (TA) molecules adaptive regulating the reconstruction of a Cu-based material to a pathway that facilitates CO₂ reduction to C₂H₄ products. An excellent Faraday efficiency (FE) of 63.6 % on C₂H₄ with a current density of 497.2 mA cm⁻² in flow cell was achieved, about 6.5 times higher than the pristine Cu catalyst which mainly produce CH₄. The in situ X-ray absorption spectroscopy and Raman studies reveal that the hydroxyl group in TA stabilizes Cu^δ+ during the CO₂RR. Furthermore, theoretical calculations demonstrate that the Cu^δ+/Cu⁰ interfaces lower the activation energy barrier for *CO dimerization, and hydroxyl species stabilize the *COH intermediate via hydrogen bonding, thereby promoting C₂H₄ production. Such molecule engineering modulated electronic structure provides a promising strategy to achieve highly selective CO₂ reduction to value-added chemicals.