树脂对茶多酚与咖啡因的吸附分离

从低档绿茶末的水提取液中，利用离子交换，吸附树脂成功地分离出茶多酚与咖啡因，并详细考察了其交换与吸附性能。与其它方法相比，该树脂法具有产品收率高，成本低廉等特点。     

VOCs控制催化剂的研制

以堇青石蜂窝陶瓷体为第一载体、γ-Al2O3为第二载体,制成的含稀土La和过渡金属元素的复合氧化物催化剂,在连续流动的反应体系上评价了催化剂对苯、氰氢酸、乙酸和氯苯等VOCs的氧化反应活性.结果表明: 采用LaCuMn组合制备的催化剂,La的含量在7%～10%左右、Cu的含量在5.5%左右、Mn的含量在7.5%左右时,第二载体γ-Al2O3的负载以采用半胶、pH值4～5、加入某些活性剂、负载量以7%～10%、活化温度为400～500 ℃时制成的催化剂的活性最好,研制的VOCs控制催化剂对各种VOCs均具有很高的催化活性.     

TS分子筛催化性能研究Ⅰ．TS－2分子筛催化1，2－丙二醇液相氧化反应的研究

ＴＳ分子筛催化性能研究Ⅰ．ＴＳ－２分子筛催化１，２－丙二醇液相氧化反应的研究①伏再辉尹笃林（湖南师范大学精细催化合成研究所，长沙４１００８１）关键词ＴＳ－２分子筛１，２－丙二醇氧化催化氧化自１９８３年Ｔａｒａｍａｓｓｏ［１］首次合成具有ＺＳＭ－５结构...     

Synthesis of Some Allyl-β-Cyclodextrin Derivatives and their Properties as Capillary GC Stationary Phases

Summary Three -Cyclodextrin derivatives (-CDs) were synthesized by substituting the 2,6-OH groups of -CD with allyl groups and the 3-OH groups with three different acyl groups (valeryl, heptanonyl, octanoyl). The chromatographic properties of these -CDs as stationary phases for capillary gas chromatography (CGC) were studied. The test results showed that the three -CDs possessed good coating properties and that the capillary columns coated with them exhibited high column efficiency. These -CDs can separate not only the disubstituted benzene isomers but also some racemic compounds.     

脱蜡剂DF-1的气相色谱-傅里叶变换红外光谱联用分析

脱蜡剂ＤＦ－１是一种含多种有机成分的碳氢化合物，经气相色谱－红外光谱联用分析后，确定了这些组分的组成与含量。     

Quantum chemistry investigation on the active site of Mn-SOD

In this paper, we carried out a theoretical study on the active site structures of the Mn-SOD with ab initio Hartree–Fock SCF method, and analyzed the molecular orbital energies, charges and atomic orbital contribution to the frontier molecular orbital.     

Influence of the reaction temperature and ph on the coordination modes of the 1,4-benzenedicarboxylate (BDC) ligand: a case study of the Ni(II)(BDC)/2,2'-bipyridine system

Three new Ni(BDC)/2,2'-bipy compounds, Ni2(BDC)(HBDC)2(2,2'-bipy)2 (2), Ni3(BDC)3(2,2'-bipy)2 (3), and Ni(BDC)(2,2-bipy)2.2H2O (5), in addition to the previously reported Ni(BDC)(2,2'-bipy).0.75H2BDC (1) and Ni(BDC)(2,2'-bipy)(H2O) (4) [BDC = 1,4-benzenedicarboxylate; 2,2'-bipy = 2,2'-bipyridine], have been synthesized by hydrothermal reactions. A systematic investigation of the effect of the reaction temperature and pH resulted in a series of compounds with different compositions and dimensionality. The diverse product slate illustrates the marked sensitivity of the structural chemistry of polycarboxylate aromatic ligands to synthesis conditions. Compound 1, which has a channel structure containing guest H2BDC molecules, is formed at the lowest pH. The guest H2BDC molecules are connected by hydrogen bonds and form extended chains. At a slightly higher pH, a dimeric molecular compound 2 is formed with a lower number of protonated carboxylate groups per nickel atom and per BDC ligand. Reactions at higher temperature and the same pH lead to the transformation of 1 and 2 into the two-dimensional, layered trinuclear compound 3. As the pH is increased, a one-dimensional polymer 4 is formed with a water molecule coordinated to Ni2+. Bis-monodentate and bischelating BDC ligands alternate along the chain to give a crankshaft rather than a regular zigzag arrangement. A further increase of the pH leads to the one-dimensional chain compound 5, which has two chelating 2,2'-bipy ligands. Crystal data: 2, triclinic, space group P, a = 7.4896(9) angstroms, b = 9.912(1) angstroms, c = 13.508(2) angstroms, alpha = 86.390(2) degrees , beta = 75.825(2) degrees, gamma = 79.612(2) degrees, Z = 2; 3, orthorhombic, space group Pbca, a = 9.626(2) angstroms, b = 17.980(3) angstroms, c = 25.131(5) angstroms, Z = 4; 5, orthorhombic, space group Pbcn, a = 14.266(2) angstroms, b = 10.692(2) angstroms, c = 17.171(2) angstroms, Z = 8.     

Recent Advances in Rare‐Earth Polypnictides

The polypnictide complexes of rare earth cations have drawn the attention of the scientific community for their uncommon bonding modes and potential applications. Herein, we present a systematic and comprehensive summary on recent advances in the field of rare earth polypnictides, focusing on their synthesis, structures, and reactivities. The structural stabilizing effects imposed by the electropositive rare earth cations as well as the reducing capability of rare earth precursors in the synthesis of these polypnictide complexes are described in this review. We also disscuss in detail the bonding interactions and coordination modes between rare earth cations and polypnictide clusters as well as the similarities and the peculiarity of some structures.     

β－甲基地高辛药物中有关物质的检测

报道了用高效液相色谱法检测β－甲基地高辛中的有关物质。色谱条件：色谱柱用ＳｐｈｅｒｉｓｏｒｂＣ_（１８），１０μｍ，４．６ｍｍ×１５０ｍｍ，检测波长２１８ｎｍ，流动相：乙腈－水（３４：６６）。检测结果提示，目前的精制工艺需进一步改进。     

硝酸肼的量热研究

用精密自动绝热量热计测定了在220 K—370 K温度范围内硝酸肼的热容、熔化热、熔化温度和熔化熵。所得热容数据的精密度以百分偏差的均方根值表示为±0.2％。三次熔化热测定的相对偏差为±0.1％。为验证结果的可靠性, 用该装置测定了冰的熔化热和熔化温度, 其结果与文献值一致; 又用法国SETARAM公司的高温量热计测定了硝酸肼的熔化热和熔化温度, 其结果与我们用量热法测定的结果一致; 从量热结果计算出了该试样的纯度, 该结果亦与化学分析的结果一致。这些均可说明我们所测得的数据是可靠的。