硫离子选择性检测试纸的制备及应用研究

基于硫离子可渗透通过过氯乙烯处理滤纸,制备了硫离子选择性检测试纸。应用该试纸测定硫化物,能够有效抑制基体成分干扰,其检出限和线性范围分别为38μmol/L和50～2100μmol/L。试纸已应用于河床污泥和鱼塘沉积物中硫化物的测定。     

Theoretical study on the geometry and vibration of 1-[6-(4-Chlorophenyl)-1-[(6-chloropyridin-3-yl)methyl]-2-[(6-chloropyridin-3-yl)methylsulfanyl]-4-methyl-1,6-dihydropyrimidin-5-yl]ethanone

The solid phase FT-IR and FT-Raman spectra of 1-[6-(4-chlorophenyl)-1-[(6-chloropyridin-3-yl)methyl]-2-[(6-chloropyridin-3-yl)methylsulfanyl]-4-methyl-1,6-dihydropyrimidin-5-yl]ethanone (C25H21Cl3N4OS) were recorded in the region 4000-400 and 3500-100cm(-1), respectively. The vibrational spectra have been computed using density functional theory (B3LYP) and ab initio molecular orbital calculation (HF) with 6-31G(d, p) basis sets. A close agreement was achieved between the observed and calculated frequency by employing normal coordinate calculations. The observed and simulated spectra were found to be well comparable.     

钼钒磷杂多酸铵蓝的合成和性质研究

本实验采用分步加原料的方法，以不同的磷钼钒比，直接合成了三种１：１２系列的钼钒磷杂多酸铵蓝，即（ＮＨ４）４Ｈ２·１５Ｈ２Ｏ（ｂｌｕｃ—１），（ＮＨ４）５Ｈ２·和（ＮＨ４）６Ｈ２·３０Ｈ２Ｏ（ｂｌｕｃ－３），并研究了反应条件对这些钼钒磷杂多酸铵蓝形成的影响．通过元素分析、电位滴定、电子光谱和Ｘ射线衍射等测试手段研究了配合物的性质，并确定了配合物的组成．     

NaYF_4∶Eu~(3+)纳米粒子和六棱柱的水热控制合成与发光性质

以柠檬酸三钠为螯合剂,通过控制反应条件,利用水热法分别合成出立方相NaYF4:Eu3+球形纳米粒子和六角相NaYF4:Eu3+六角微米棱柱。利用X射线粉末衍射(XRD)、场扫描电子显微镜(SEM)、红外吸收(FTIR),以及发光光谱等手段对产物的物相结构、形貌和荧光性能进行了分析。结果显示产物的晶格结构和柠檬酸分子的选择性吸附是晶体形貌可控的主要原因。在395nm光激发下,NaYF4:Eu3+样品显示出较强的橙色(588nm)和红色(614nm)发光,分别来自于Eu3+离子5D0→7F1和5D0→7F2的跃迁。从5D0→7F2与5D0→7F1跃迁的强度比可以推断在立方相纳米粒子的晶格中Eu3+离子更多地占据反演中心的格位。     

小分子蛋白酪氨酸激酶抑制剂的合成研究进展

蛋白酪氨酸激酶在肿瘤的形成和增殖中起着关键作用,以蛋白酪氨酸激酶作为肿瘤治疗靶点的研究受到极大关注.本文作者综述了近十年来不同结构的酪氨酸激酶抑制剂的合成以及抗肿瘤活性的研究进展,以期为酪氨酸激酶抑制剂的研究与开发提供参考.     

坦克智能体的感知行为建模

首先,从战场信息感知的功能入手,提出了信息条件下坦克智能体的感知行为模型框架;然后,分析了感知行为产生的要素,建立了坦克智能体观察模型;最后,通过战场态势进一步说明建立模型的必要性。     

粉防己碱衍生物的合成及其抗肿瘤作用研究

以粉防己碱为原料,依次经硝化、还原和Chan-Lam-Evans偶联共计3步反应,设计并合成了12种双苄基异喹啉衍生物,其结构经¹HNMR、¹³CNMR和HR-MS表征。采用MTT法对所得衍生物对人肝癌细胞HepG2、人正常肝细胞HL7702、人肺癌细胞A549的体外抑制活性进行了初步评价。MTT实验结果表明：所得衍生物对癌细胞生长具有较强的抑制作用,并对其构效关系进行了初步评价。化合物7、8对两种癌细胞均有良好的抗肿瘤活性,可能作为一种潜在的抗肝癌药物。其中化合物7对HepG2细胞的抑制作用最强,IC₅₀值为3.72μmol?L^-1,并具有明显的抑制HepG2迁移和侵袭的能力。      

SYNTHESIS AND CATALYTIC PROPERTY OF POLYSTYRENE SUPPORTED GLUTAMIC ACID SCHIFF BASE COMPLEX OF Mn(Ⅱ)IN AEROBIC OXIDATION OF CYCLOHEXENE

The polystyrene supported glutamic acid Schiff base complex of Mn (Ⅱ) (PS-Sal-Glue-Mn) was prepared with chloromethylated styrene polymer beads,2,4-dihydroxybenzaldehyde, L-glutamic acid and manganese (Ⅱ) acetate tetrahyrate. The polymeric ligand and the complex were characterized by FT-IR, small area X-ray photoelectron spectroscopy (XPS) and ICP-AES. In the presence of the manganese complex, cyclohexene (1) was effectively oxidized by molecular oxygen without reductant. The major products of the reaction were 2-cyclohexen-1-ol (2), 2-cyclohexen-1-one (3) and 2-cyclohexen-1- hydroperoxide (4), which was different with typical oxidation of cyclohexene. The influence of reaction temperature and additive for oxidation had been studied. The selectivity of 2-cyclohexen-1-hydroperoxide varied with reaction time and different additives. The mechanism of cyclohexene oxidation had also been discussed.     

基于轴线检测的回转窑支承系统等寿命优化研究

回转窑运行中由于轴线偏移，支承载荷分配不均导致托轮轴疲劳断裂。本文通过对回转窑托轮轴进行力学分析，导出支承系统各托轮轴疲劳损伤与轴线偏差的关系，从而根据轴线检测得出各托轮轴剩余疲劳寿命；以轴线偏差调整量为优化变量，各托轮轴中最小的剩余寿命最大为目标函数建立优化模型，结合现场实例进行支承系统等寿命优化调整研究。研究结果表明常规的调窑方法存在很大的盲目性，应用等寿命优化调整的方法必要、可行，能有效防止托轮轴疲劳断裂事故，为回转窑的维护与调整提供理论依据，对现场生产有重要的指导意义。     

POLYMER BOUND TRANSITION METAL COMPLEXES FOR CATALYTIC OXIDATION OF CYCLOHEXENE WITH MOLECULAR OXYGEN

Polymer-bound Schiff-base ligand （PS-Sal-Cys） was prepared from the polystyrene-bound salicylaldehyde and L-cysteine, its complex （PS-Sal-Cys-Mn） was also synthesized. The polymer ligand and its complex were characterized by infrared spectra （IR）, small area X-ray photoelectron spectroscopy （XPS）, and inductively coupled plasma-atomic emission spectro （ICP-AES）. In the presence of complex, cyclohexane can be effectively oxidized by molecular oxygen without a reductant. The major products of the reaction are 2-cyclohexen-1-ol, 2-cyclohexen-1-one, and 2-cyclohexen-1-hydroperoxide, which is different from the typical oxidation of cyclohexene. The mechanism of cyclohexene oxidation is also discussed.