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There are 619 papers published in subject: since this site started. |
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1. Four-stage Cu3O2 bonding quantum kinetics | |||
Sun Changqing | |||
Chemistry 19 July 2005 | |||
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Abstract:Four-stage Cu3O2 bonding quantum kinetics on Cu(001) surface has been quantified with the combinaion of STM and LEED. | |||
TO cite this article:Sun Changqing. Four-stage Cu3O2 bonding quantum kinetics[OL].[19 July 2005] http://en.paper.edu.cn/en_releasepaper/content/2483 |
2. Low and wide phase transition temperature dimesogenic compounds consisting of a cholesteryl and 4-( trans- 4-n-alkylcyclohexyl) phenoxy mesogens | |||
Chunbo Zhang,Zhiqi Cong,Bingzhu Yin | |||
Chemistry 30 May 2005 | |||
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Abstract:Unsymmetrical dimesogenic compounds having cholesteryl and 4-trans- (4-n -alkylcyclohexyl) phenoxy group were synthesized by condensation of cholesterylω-bromopentanoates with appropriate 4-trans- (4-n-alkylcyclo- hexyl) phenols. Structures and thermal phase behaviour of these dimers have been confirmed by IR, 1H NMR , elemental analysis,DSC,polarity microscopy and XRD measurements. Their thermal phase behaviour is significantly different to that of other cholesterol-based liqud crystalline dimmers which having low and wide phase transition temperature. | |||
TO cite this article:Chunbo Zhang,Zhiqi Cong,Bingzhu Yin. Low and wide phase transition temperature dimesogenic compounds consisting of a cholesteryl and 4-( trans- 4-n-alkylcyclohexyl) phenoxy mesogens[OL].[30 May 2005] http://en.paper.edu.cn/en_releasepaper/content/2124 |
3. Investigation on the rate of reaction between gas (CO2) and liquor (NaOH) phases | |||
Chen Bin,LI Xiao-bin,LIU Gui-hua | |||
Chemistry 26 April 2005 | |||
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Abstract:The neutralization of sodium hydroxide by carbon dioxide occurring during the process of carbonization precipitation of sodium aluminate solution was investigated. Firstly, the effects of those main factors such as CO2 concentration、temperature、initial concentration of NaOH were investigated. Then the kinetics equation concerning this reaction was obtained after proper data treatment. The results showed that it assumes an apparent activation energy of 8.06 kJ/mol which indicated a diffusion-controlled process. Furthermore, based on the principles governing diffusion-controlled process, the dependence of neutralization rate on gas flow was deduced theoretically with a form as: rd=KDKCA(Q/VL)2/3 whose plausibility was validated by those experimental research thereafter. | |||
TO cite this article:Chen Bin,LI Xiao-bin,LIU Gui-hua. Investigation on the rate of reaction between gas (CO2) and liquor (NaOH) phases[OL].[26 April 2005] http://en.paper.edu.cn/en_releasepaper/content/1933 |
4. Synthesis and Characterization of Mesoprous Europium ( III ) Silicate Molecular Sieves | |||
Yin Wei | |||
Chemistry 25 April 2005 | |||
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Abstract:he luminescent nanosized Eu-MCM (1:10) is synthesized by means of sol-gel-assisted self-assembly under basic conditions at room temperature. That result of 29Si-MAS NMR show that the peaks are Q4, Q3, Q2 [ (SiO)4-mSi–(OH)m ( m = 0, 1, 2 ), at –111, –103, –90 ppm ], and q3, q2, q1, q0 [ (SiO)4-nSi–(O–Eu)n ( n=1, 2, 3, 4 ), at –83, –72, –55, –47 ppm ]. The result proves that Eu3+ doped Si-O framework. The HRTEM image shows that the regular uniform nanoparticles with a diameter of 15 nm possess ultralarge pore with Æ8nm, which is consistent with the result of N2 Adsorption. The patterns of selected-area electron diffraction, XRD, and pore-size distribution plot of Eu-MCM (1:10) show The results show that the sample of Eu-MCM (1:10) possesses the both of crystal and amorphous phases. The FTIR results indicate that the peaks near 970cm-1 are assigned to the deformation vibration of silanol group. The as-product is calcined at 800 oC and the mesoporous material possess enormous specif | |||
TO cite this article:Yin Wei. Synthesis and Characterization of Mesoprous Europium ( III ) Silicate Molecular Sieves[OL].[25 April 2005] http://en.paper.edu.cn/en_releasepaper/content/1917 |
5. Oscillations of partial oxidation of methane over H-ZSM-5 supported rhodium catalyst | |||
Ying Liu | |||
Chemistry 04 April 2005 | |||
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Abstract:The oscillatory behavior over the Rh/H-ZSM-5 catalyst was firstly reported at atmospheric pressure during the partial oxidation of methane. Temperature programmed techniques such as TPO and TPR were performed to look into the reaction mechanism. The results obtained from the experimental studies indicate that the synergism of the coke |