Formation of Pyrrolidin-1-ylcyclopentadienes via Cyclization of Alkyl 2-Dimethoxyacetyl-and 2-Ethoxalyl-4-oxopentanoates

ＦｏｒｍａｔｉｏｎｏｆＰｙｒｒｏｌｉｄｉｎ┐１┐ｙｌｃｙｃｌｏｐｅｎｔａｄｉｅｎｅｓｖｉａＣｙｃｌｉｚａｔｉｏｎｏｆＡｌｋｙｌ２┐Ｄｉｍｅｔｈｏｘｙａｃｅｔｙｌ┐ａｎｄ２┐Ｅｔｈｏｘａｌｙｌ┐４┐ｏｘｏｐｅｎｔａｎｏａｔｅｓ＊ＺＨＵＹｉ－ｑｉａｎｇ,...     

还原热解催化合成金刚石新法

ＳｙｎｔｈｅｔｉｃＤｉａｍｏｎｄｆｒｏｍａＮｏｖｅｌＲｅｄｕｃｔｉｏｎ┐Ｐｙｒｏｌｙｓｉｓ┐ＣａｔａｌｙｓｔＲｏｕｔｅ１．论文名称ＡＲｅｄｕｃｔｉｏｎ－Ｐｙｒｏｌｙｓｉｓ－ＣａｔａｌｙｓｔＳｙｎｔｈｅｓｉｓｏｆＤｉａｍｏｎｄ２．发表刊物Ｓｃｉｅｎｃｅ...     

Determination of Amino Acidsas Their N-Hydroxy-succinimidyl-3-indolylacetate Derivatives by Reversed-phase HPLC

ＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＡｍｉｎｏＡｃｉｄｓａｓＴｈｅｉｒＮ┐Ｈｙｄｒｏｘｙ┐ｓｕｃｃｉｎｉｍｉｄｙｌ┐３┐ｉｎｄｏｌｙｌａｃｅｔａｔｅＤｅｒｉｖａｔｉｖｅｓｂｙＲｅｖｅｒｓｅｄ┐ｐｈａｓｅＨＰＬＣ＊ＱＩＵＰｅｉ－ｈｏｎｇ＊＊（Ｄｅｐａｒｔｍｅ...     

Studies on Thiosemicarbazides and Related Heterocycles(ⅩⅩⅥ)──Synthesis of 3-[5'-amino-1'-(4"-chlorophenyl)-1',2',3'-triazol-4'-yl]-4-aryl-1,2,4-triazoline-5-thiones

ＳｔｕｄｉｅｓｏｎＴｈｉｏｓｅｍｉｃａｒｂａｚｉｄｅｓａｎｄＲｅｌａｔｅｄＨｅｔｅｒｏｃｙｃｌｅｓ（）Ｓｙｎｔｈｅｓｉｓｏｆ３┐［５┐ａｍｉｎｏ┐１┐（４＂┐ｃｈｌｏｒｏｐｈｅｎｙｌ）┐１，２，３┐ｔｒｉａｚｏｌ┐４┐ｙｌ］┐４┐ａｒｙｌ...     

PREPARATION OF SILICALITE-1 AND ZSM-5 ZEOLITE/ CERAMIC COMPOSITE MEMBRANES

ＰＲＥＰＡＲＡＴＩＯＮＯＦＳＩＬＩＣＡＬＩＴＥ┐１ＡＮＤＺＳＭ┐５ＺＥＯＬＩＴＥ／ＣＥＲＡＭＩＣＣＯＭＰＯＳＩＴＥＭＥＭＢＲＡＮＥＳＺｈａｎｇＬｉｘｉｏｎｇ，ＪｉａＭｅｎｇｄｏｎｇ，ＭｉｎＥｎｚｅ（ＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＰｅｔｒｏｌｅ...     

Stereoselective Syntheses of Some β-D-1-Thioglycopyranosides and Bis(β-D-glycopyranosyl) Sulfides by Phase Transition Catalysis

ＳｔｅｒｅｏｓｅｌｅｃｔｉｖｅＳｙｎｔｈｅｓｅｓｏｆＳｏｍｅβ┐Ｄ┐１┐ＴｈｉｏｇｌｙｃｏｐｙｒａｎｏｓｉｄｅｓａｎｄＢｉｓ（β┐Ｄ┐ｇｌｙｃｏｐｙｒａｎｏｓｙｌ）ＳｕｌｆｉｄｅｓｂｙＰｈａｓｅＴｒａｎｓｉｔｉｏｎＣａｔａｌｙｓｉｓ＊ＹＵＪｉａｎ－ｘ...     

Synthesis and Magnetism of 2-Hydroxy-1,3-propylene-bis(oxamato)-bridged Co~ⅡCu~ⅡCo~Ⅱ Complexes

ＳｙｎｔｈｅｓｉｓａｎｄＭａｇｎｅｔｉｓｍｏｆ２┐Ｈｙｄｒｏｘｙ┐１，３┐ｐｒｏｐｙｌｅｎｅ┐ｂｉｓ（ｏｘａｍａｔｏ）┐ｂｒｉｄｇｅｄＣｏⅡＣｕⅡＣｏⅡＣｏｍｐｌｅｘｅｓＭＩＡＯＭｉｎｇ－ｍｉｎｇ，ＣＨＥＮＧＰｅｎｇ，ＬＩＡＯＤａｉ－ｚｈｅｎｇＪＩＡ...     

Hydroxylation of Aromatic Hydrocarbons with H_2O_2 over Titanium Silicalite(TS-1)

ＨｙｄｒｏｘｙｌａｔｉｏｎｏｆＡｒｏｍａｔｉｃＨｙｄｒｏｃａｒｂｏｎｓｗｉｔｈＨ２Ｏ２ｏｖｅｒＴｉｔａｎｉｕｍＳｉｌｉｃａｌｉｔｅ（ＴＳ┐１）ＹＡＮＧＷｕｂｉｎＬＩＵＸｉｙａｏ１）（ＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＢｅｉｊｉｎｇＹａｎｓｈａｎＰ...     

FAB MS of Permethylated L-β-Aspartamido-Carbohydrates

ＦＡＢＭＳｏｆＰｅｒｍｅｔｈｙｌａｔｅｄＬ┐β┐Ａｓｐａｒｔａｍｉｄｏ┐ＣａｒｂｏｈｙｄｒａｔｅｓＷＡＮＧＴｓｏｎｇ－ｈｕｉ＊（ＤｅｐａｒｔｍｅｎｔｏｆＩｎｓｔｒｕｍｅｎｔａｌＡｎａｌｙｓｉｓ，ＩｎｓｔｉｔｕｔｅｏｆＦｏｒｅｎｓｉｃＳｃｉｅｎｃｅ，Ｂ...     

新颖的研究分子内远程电子转移和三线态能量转移过程的体系和方法

新颖的研究分子内远程电子转移和三线态能量转移过程的体系和方法ＡＮｅｗＳｙｓｔｅｍｆｏｒＳｔｕｄｉｅｓｏｎＩｎｔｒａｍｏｌｅｃｕｌａｒＬｏｎｇ┐ＤｉｓｔａｎｃｅＥｌｅｃｔｒｏｎＴｒａｎｓｆｅｒａｎｄＴｒｉｐｌｅｔＥｎｅｒｇｙＴｒａｎｓｆｅｒ１．论文名称...     

用计算模拟方法研究Al_3P_4O_(16)~(3-)计量比的二维层状磷酸铝中的有机胺模板能力

将快速 Monte Carlo方法与分子动力学方法相结合 ,研究了不同种类有机分子在 Al3P4 O3- 1 6 计量比的二维层状磷酸铝形成中的模板能力 .依据主 -客体之间非键相互作用能 (包括范德华能、氢键能和库仑能 ) ,可合理地解释已知实验现象 ,并能有效地预测出适于形成某一特定无机层结构的有机胺模板剂 .通过选择理论预测的有机胺分子作为模板剂 ,成功地合成了二维层状磷酸铝化合物 Al3P4 O1 6 · 1 .5 H3NC6 H1 0 NH3.     

用分子动力学模拟方法研究层孔与微孔磷酸铝化合 物中有机胺的模板作用: 指 导定向合成的有效途径

用分子动力学方法,研究了有机胺模板剂对二维层孔与三维微孔磷酸铝化合物的模板作用。依据主-客体间的非键相互作用能量,可以有效地预测出适于某一特定结构的有机胺模板剂。通过选择理论预测的有机胺分子作模板剂,在溶剂热体系中可以定向地合成出具有特定结构的化合物。这一工作对于微孔功能体系的分子工程学研究具有一定的指导意义。     

数据挖掘辅助定向合成(Ⅰ)具有特定孔道结构的微孔磷酸铝

采用决策树方法对微孔磷酸铝的合成反应数据库进行了数据挖掘研究, 结果表明, 有机胺模板剂的属性对特定孔道的生成起着至关重要的作用. 进一步分析得到合成十二元环AlPO4-5微孔磷酸铝的约束条件, 并从理论上预测出用于合成十二元环AlPO4-5微孔磷酸铝的一系列新的有机胺模板剂. 部分理论分析结果得到了分子力学计算的有力支持, 并被合成实验所验证.     

Organosilane surfactant-directed synthesis of mesoporous aluminophosphates constructed with crystalline microporous frameworks

A direct hydrothermal assembly process was developed to synthesize mesoporous aluminophosphates that are constructed with crystalline microporous frameworks, by the addition of organosilane surfactants into the conventional synthesis composition for crystalline microporous aluminophosphates.     

Insights into Structure Direction of Microporous Aluminophosphates: Competition between Organic Molecules and Water

A combination of experimental characterisation techniques and computational modelling has allowed us to gain insight into the molecular features governing structure direction in the synthesis of microporous aluminophosphates. The occlusion of three different structure‐directing agents (SDAs), triethylamine (TEA), benzylpyrrolidine (BP) and (S )‐(?)‐N‐benzylpyrrolidine‐2‐methanol (BPM), within the AFI structure during its crystallisation, together with the simultaneous incorporation of water, has been experimentally measured. We found a higher incorporation of organic molecules in the structure obtained with BPM, while a higher water (and lower organic) content is found for the ones obtained with TEA and BP as SDAs. The computational study provides a thermodynamic explanation for the observed behaviour in terms of the relative stabilisation energy of the SDAs and water molecules within the AFI framework compared with when they are in aqueous solution, and demonstrates that a competition for preferential occupation exists between water and organic SDAs, which is a function of the interaction with the inorganic framework. The lower interaction of TEA and BP molecules with the AFI structure promotes the simultaneous incorporation of water molecules in the 12‐membered‐ring (MR) channel, to increase the host–guest interaction energy and thus the thermodynamic stability. The presence of strongly interacting methanol groups in the BPM molecules leads to the incorporation of only organic molecules within the 12‐MR channels. Our results demonstrate the essential role that water molecules play in the stabilisation of hydrophilic microporous aluminophosphates; a minimum amount of organic SDA is, however, essential for a templating role of the microporous architecture.     

Calorimetric Study of the Acidity of a New Family of Mesoporous Catalysts

Thermally stable mesoporous aluminophosphates (AIPO) and silicoaluminophosphates (SAPO) were prepared at room temperature in the presence of a cationic surfactant and an organic base. These materials possess high surface areas and regular mesopores of approximately 35 Å diameter. By contrast to microporous crystalline aluminophosphate molecular sieves, mesoporous compounds are amorphous and characterized by Al/P ratios greater than 1. These particularities are responsible for a strong Lewis acidity, as evidenced by ammonia adsorption microcalorimetry. Mesoporous materials are more acidic than the microporous analogues and the amount of strong acid sites increases with the silicon content. This revised version was published online in July 2006 with corrections to the Cover Date.     

Molecular Model for Aluminophosphates Containing Fluoride as a Structure-Directing and Mineralizing Agent

Two tricyclic capped six-rings (C6R), a double four-ring (D4R), and an Al(μ-F)₂Al unit are among the structural features of 1 (see picture for structure) that are closely related to motifs found in layered and three-dimensional alumino- and gallophosphates. Several reactive centers can render 1 a viable precursor for the synthesis of microporous aluminophosphates.     

The Relation between the Efficiency of an Adsorbent in a Refrigeration System and Its Hydration Isotherm

The efficiencies of various types of silica gels, zeolites, and crystalline microporous aluminophosphates in adsorption systems of refrigeration have been determined. On the basis of the results obtained a method is proposed for the determination of the efficiency of an adsorbent from its hydration isotherm without experimental determination of the temperature dependence of the adsorption equilibrium parameters.     

定向合成具有AIPO-HDA骨架的微孔磷酸铝 Al~4P~5O~2~0H·C~4N~3H~1~5

用分子动力学方法,研究了不同种类的双胺和多胺与非等比三维微孔磷酸铝Al~4P~5O~2~0H·C~6N~2H~1~8(AlPO-HDA)的模板作用。依据主-客体的非键相互作用能量,有效地预测了可以诱导AlPO-HDA无机骨架生成的有机胺模板剂。选择理论预测的二乙烯三胺为模板剂,成功地合成了与AlPO-HDA同构的Al~4P~5O~2~0H·C~4N~3H~1~5(AlPO-DET),并对其进行了详细的结构表征。     

Neutral 1D Perovskite-Type ABX3 Phase Transition Material with a Narrowband Emission and Semiconductor Property

Cyclic organic amines are emerging as excellent building blocks to assemble organic–inorganic hybrid phase transition materials due to their flexible cyclic structure. Here, we have assembled a 1D organic-inorganic hybrid dielectric material C₅H₆NOPbBr₃ ( 1 ) by alloying the cyclic organic amine 3-hydroxypyridine. 1 displays a remarkable switchable dielectric response induced by an order-disorder transformation of the organic moiety, this transformation behaviour is confirmed by DSC and Hirshfeld surface measurements. More interestingly, 1 has a narrowband emission (FWHM=4.64 nm) at 590 nm; FWHM is a major quality figure for narrowband photodetectors. In addition, 1 exhibits semiconducting properties with an indirect bandgap of 2.78 eV by the analysis of the UV-Vis absorption results.