两种不同晶型酞菁氧钒的制备及其光导性

以不同方法制备了两种不同晶型的酞菁氧钒（ＶＯＰｃ），Ｘ－射线分析结果表明，一为多晶型，另一种为非晶型。两种晶型在红外区都具有光导性，非晶型的光导性更好。     

X射线在酞菁氧钛与金界面的剂量增强计算

用蒙特卡罗方法计算了金-酞菁氧钛界面的剂量增强系数随能量的变化关系及不同厚度的金和酞菁氧钛对剂量增强系数的影响.结果表明:当X射线能量为10-250 keV时,界面附近酞菁氧钛一侧存在不同程度的剂量增强,剂量增强系数最大值达41.7;在金厚度一定时,随酞菁氧钛厚度减小,剂量增强加大,剂量增强系数随能量增加会出现2个明显...     

氯酞菁氯铝的多晶性

制得３种不同晶型的氯酞菁氯铝，并以Ｘ－光粉末衍射（ＸＲＤ）及ＦＴ－ＩＲ表征，比较了各种晶型ＡｌＣｌＰｃｃｌ室温硫化硅橡胶的吸收光谱。讨论了ＡｌＣｌＰｃＣｌ的纯化方法。     

不同结构母体对制备钛沸石的影响

以ＺＳＭ－５，ＺＳＭ－１１，β，Ｙ，ＺＳＭ－１２和ＺＳＭ－４８型沸石为体进行气固相同晶取代，考察了母 体对钛进入沸石骨架难易程度的影响。结果表明，以ＺＳＭ－５，ＺＳＭ－１１和β型沸石为母体，钛较易进入沸石骨架，而以Ｙ，ＺＳＭ－１２和ＺＳＭ－４８型沸石为母体，钛很难进入沸石骨架。     

纳米钙钛矿型氧化物LaFe_(1-y)Al_yO_(3-λ)制备及催化性能

采用溶胶－凝胶方法制备了Ｂ－位掺杂的纳米钙钛矿型复合氧化物ＬａＦｅ１－ｙＡｌｙＯ３－λ，并对其催化甲烷完全氧化性能进行了研究．发现纳米氧化物（ｙ＝０．１）可以大幅度降低反应温度，其比活性和表面Ｏ晶／Ｏ吸均较大，晶格氧物种可能有利于甲烷的完全氧化     

纳米酞菁氧钛(TiOPc)的制备及光敏性能

纳米酞菁氧钛(TiOPc)的制备及光敏性能;有机光导材料     

可溶性氧钒酞菁的合成及取代基位置对其性质的影响

本文通过较简单的途径合成了酞菁衍生物，即在氧钒酞菁环的不同位置上引入了长链酰胺基团－NHCO(CH2)16CH3并使氮端与酞菁环相连，以增强取代基对酞菁环的给电子能力。并通过吸收光谱研究了两种酞菁衍生物在不同状态下的存在形式。     

纳米钙钛矿型氧化物LaF1—yAlyO3—λ制备及催化性能

采用溶胶－胶方法制备了Ｂ－位掺杂的纳米钙钛矿型复合氧化物ＬａＦｅ１－ｙＡｌｙＯ３－λ，并对其催化甲烷完全氧化进行了研究，发现纳米氧化物（ｙ＝０．１）可以大幅度降低反应温度，其比活性和表面Ｏ晶／Ｏ吸较大，晶的种可能有利于甲烷的完全氧化。     

酞菁氧钛/卟啉氧钒复合体系光导性能的协同增强效应

在酞菁氧钛（TiOPc)／卟啉氧钒（VOTPP）复合光生材料中发现了光敏性的非线性增强现象，对复合体系的电子跃迁光谱和X射线衍射图的研究结果表明，在基态下两种材料之间没有明显相互作用，光致放电研究说明，该现象来自光激发状态下复合体系中的隙间态跃迁对光导的贡献，XPS测试结果表明酞菁氧钛与卟啉氧钒分子之间存在着定向的部分电荷转移，光致激发状态下的电荷转移是协同增强效应的起因，这种协同增强效应为利用弱的电子给体与弱的受体复合体系设计新型光导材料与器件提供了新方法。     

Ti－Si Pentasil型杂原子分子筛的气团相同晶取代法制备及其羟基化性能──Ⅱ．制备条件及母体对钛进入骨架的影响

Ｔｉ－Ｓｉ　Ｐｅｎｔａｓｉｌ型杂原子分子筛的气团相同晶取代法制备及其羟基化性能──Ⅱ．制备条件及母体对钛进入骨架的影响郭新闻，王桂茹，王祥生（大连理工大学工业催化剂研究所，大连１１６０１２）关键词Ｔｉ－ＺＳＭ－５分子筛，杂原子分子筛，气团相同晶取代含...     

Dehydrogenation of Bicyclohexyl on a Pt Catalyst Based on Oxidized Carbon Nanotubes

The dehydrogenation of bicyclohexyl over Pt-containing catalysts based on oxidized carbon nanotubes at 320°С has been studied. Decreasing the active component concentration from 3.0 to 0.5 wt % led to a significant increase in the specific activity of the catalyst measured from the evolved hydrogen volume. The use of oxidized carbon nanotubes in synthesis of active Pt-supported catalysts for bicyclohexyl dehydrogenation did not result in their deactivation.     

Short-Range Ordering in Liquid Bicyclohexyl by X-Ray Diffraction

Abstract

The paper reports results of the X-ray diffraction structural studies of liquid bicyclohexyl, C₆H₁₁—C₆H₁₁ at room temperature, using CuK _α radiation. Angular distribution of X-ray scattered intensity was measured, and the electron-density radial-distribution function was calculated. Computer techniques were used to minimize the effects of experimental errors, uncertainties in the scattering factors, and termination errors. Good agreement between the theoretical and experimental functions was obtained on assuming the statistically most probable model of this molecule. The structural data obtainable by X-ray analysis for liquid bicyclohexyl were discussed. The mean distances between the neighbouring molecules and the radii of coordination spheres were found. The maxima in the differential radial distribution function were at: r ₁ = 4.68, r ₂ = 5.57, r ₃ = 6.62, r ₄ = 8.05 Å. X-ray structural analysis was applied to determine the packing coefficient of bicyclohexyl molecules. A simple model of short-range arrangement of the molecules in liquid bicyclohexyl was proposed.     

The effect of crystalline phase on the fluorescence characteristics of solid cyclohexane and bicyclohexyl

Emission from cyclohexane and bicyclohexyl solids has been found to critically depend on their crystalline structure. The emission spectrum of cyclohexane suddenly blue-shifts 2900 cm^?1 on cooling below its solid—solid phase transition temperature (?87.1°C). The bicyclohexyl emission intensity sharply decreases on freezing to solid and then again sharply recovers at a heretofore unreported phase transition temperature (≈ 0°C) with the spectrum 2500 cm^?1 blue-shifted from that of the liquid. The results are discussed utilizing the partial Rydberg nature of the excited cycloalkane states.     

Application of the Prigogine-Flory-Patterson theory part I. Mixtures ofn-alkanes with bicyclic compounds,benzene, cyclohexane andn-hexane

The Prigogine-Flory-Patterson theory of liquid mixtures has been applied to the H _m ^E and V _m ^E for binary mixtures of an n-alkane with decalin, bicyclohexyl, tetralin, cyclohexylbenzene, benzene, cyclohexane and n-hexane. Furthermore the Prigogine-Flory theory has been used to predict activity coefficients at infinite dilution from the experimentally determined H _m ^E at 25°C and at finite concentrations for n-hexane and n-heptane with decalin, bicyclohexyl, tetralin and cyclohexylbenzene.     

Dehydrogenataion of Bicyclohexyl over Ni/Oxidized Sibunit Catalyst

Russian Journal of Physical Chemistry A - The dehydrogenation of bicyclohexyl over single-component Ni-containing catalyst supported on oxidized Sibunit containing 3, 10, and 20 wt % of Ni is...     

The excess volumes of bicyclohexyl+cyclohexane, + cycloheptane,and + cyclooctane at three different temperatures

The excess volumes of bicyclohexyl + cyclohexane, + cycloheptane, and + cyclooctane have been measured over the whole composition range at 288.15, 298.15, and 308.15 K.     

The excess volumes of tetrahydronaphthalene inn-alkanes at 10 and 25°C

The excess volume of mixing tetrahydronaphthalene with n-pentane, n-hexane, n-heptane, n-octane, n-dodecane and n-hexadecane have been measured over the whole composition range at two temperatures. The results are compared to the excess volume of mixing bicyclohexyl with the same solvents.     

Molecular mechanics calculations (MM3) on bicycloalkyl hydrocarbons

A series of bicycloalkyl hydrocarbons were studied using molecular mechanics methods (MM3), and the results were compared with the experimental data available. Five compounds were studied: bicyclopropyl, bicyclobutyl, bicyclopentyl, bicyclohexyl and 2,3-dimethylbutane. In general, the MM3 results are in good agreement with experimental values. Predicted structures and conformations are given for the bicyclopentyl previously uninvestigated experimentally.     

Application of the Prigogine-Flory-Patterson theory part II. Mixtures of a bicyclic compound,benzene, cyclohexane,n-hexane with a 1-alkene and a 1-alkyne

The Prigogine-Flory-Patterson theory of liquid mixtures has been applied to the H _m ^E and V _m ^E for binary mixtures of an n-alkane with decalin, bicyclohexyl, tetralin, cyclohexylbenzene, benzene, cyclohexane and n-hexane with 1-hexene, 1-hexyne, 1-heptene and 1-heptyne. Furthermore the Prigogine-Flory theory has been used to predict activity coefficients at infinite dilution from the experimentally determined H _m ^E at 25°C for the mixtures 1-hexene, 1-hexyne, 1-heptene, 1-heptyne with decalin, bicyclohexyl, tetralin and cyclohexylbenzene. The predictions are compared to experimental results.     

Excess volumes of decahydronaphthalene inn-alkanes at 10 and 25°C

The molar excess volumes of mixing decahydronaphthalene (decalin) with n-pentane, n-hexane, n-heptane, n-octane, n-dodecane and n-hexadecane have been measured over the whole composition range at two temperatures. These results together with the calculated molar excess volume temperature coefficients at equimolar composition have been compared with the results of other two-ring compounds (bicyclohexyl and tetralin) in the same n-alkanes.