Search results

Rare earth ion has a unique electronic structure and bonding characteristics, and they are high and variable in coordination number, rare earth ions are particularly suitable for applications as light emitters due to their well-defined transitions within the 4f shell.[1] So rare earth compounds can show unique optical, electrical, magnetic and laser properties.
This paper, by precipitation method and sonochemical route for preparing Eu(DBM)3•phen, systematically studies the topography, structure and glowing characteristics, and analysis of the various factors on the properties of rare earth complexes influence.
This is because the ultrasonic can make the system of substances as strong movement; accelerate the material transfer, diffusion, for the physical chemistry provides mechanical function.

Silsesquioxanes possess a particular organic-inorganic hybrid structure.
This hybrid structure endows them excellent thermal stability.
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)

Synthesis, Properties and Application in Optical Memory of A Photochromic Diarylethene Bearing chlorine Atoms Ming Liu, Shouzhi Pu*,Gang Liu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013, P.
The structure of 1a was characterized by 1H NMR.
The structure of 1a was characterized by 1H NMR. 1H NMR (400 MHz, CDCl3, ppm): δ 2.08 (s, 3H, -CH3), 2.35 (s, 3H, -CH3), 2.69 (s, 3H, -CH3)，7.19 (s, 1H, thiophene-H), 7.20-7.22 (t, 1H, benzene-H), 7.23-7.25 (t, 1H, benzene-H), 7.36 (d, 1H, benzene-H), 7.48(d, 1H, benzene-H).

Introduction The damping in composite materials plays an important role in controlling noise and vibration in a dynamic structure and thus in prolonging its service life under the repeated loading or impact [1].
According to the Granato-Lücke theory [11-12], the dislocation structure is assumed to consist of segments of length LN along which weak pinning points are distributed randomly.
Zasadzinski, and et: Materials Chemistry and Physics Vol. 81 (2003), p. 528 [7] J.W.

d For Si with the diamond structure and semiconductor compounds with zinc-blende structure, h = ( 3 /4)a with a being the lattice parameters.
Weast: CRC Handbook of Chemistry and Physics, 69th ed.

The bands at 517, 587, and 815 cm-1 indicate the complete crystalline structure of the natural zeolite.
This may be due to the partial destruction of the structure of adsorbents during the regeneration.
Journal of Solid State Chemistry, 2005, 178(1): 142–152

When additive ions are introduced during the obtaining processes of powder, three possible paths may be considered: (a) diffuse into the bulk of the particle, forming of a new crystallographic structure or a solid solution, (b) migrate to the surface (surface additives) or (c) nucleate a second phase.
Such modifications could be detected for either crystalline structure or surface physicalchemical analysis and the highest change on acidity/basicity character of powders can be associated to the migration of additives to surface [5].
In: Surface and Colloid Chemistry in Advanced Ceramic Processing - Surfactant Science Series, Vol. 51, ed.

A dendritic structure of β phases is well developed in the surface composite layer of the T2 specimen (Figure 2(b)).
This structure was formed as β phases were precipitated directly from the melt [5].
Weast: Handbook of Chemistry and Physics, 55th.

The molecular structure of the product phenylferrocene was confirmed by X-ray single crystal diffraction (see Fig.5).
Fig.3 The effect of pressure on the yield ratio Fig.4 The effect of the temperature on the yield ratio Fig.5 The molecular structure of phenylferrocene Conclusion The Suzuki cross-coupling reaction of Iodoferrocene and phenylboronic acid is carried out in the environmentally benign supercritical CO2 and the reaction product phenylferrocene was obtained in better yield ratio (78%).
Soc., Perkin Trans.1, (1999), P.2513 [3] Christopher Imrie, Christa Loubser: Journal of Organometallic Chemistry Vol.645 (2002), P.65 [4]Xiujuan Feng,Mei Yan, Tao Zhang, Ying Liu and Ming Bao: Green Chem.Vol.12, (2010), P.1758 [5]Xue Han and Martyn Poliakoff: Chem.

Hydrodynamic and Mass Transfer Performance of Enhanced Jet Tray Jun Li 1,2, a, Lanyi Sun1, b, Zhanhua Ma 1, c, Sha Xue 1,d, Yangdong Hu 2, e 1State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266555, China, 2Department of Chemistry and Chemical Engineering; Ocean University of China; Qingdao 266100; China aupclijun@126.com, bsunlanyi@163.com, cmzh_1999@126.com, dxueshaciciling@163.com, eydhuhd@ouc.edu.cn Key words: enhanced jet tray; new vertical sieve tray; hydrodynamic; efficiency Abstract.
Both trays showed similar trends in pressure drop characteristics, however, wet plate drop of EJT is 16% lower than that of New VST, which might result from the opening structure of the bubble cap which ensures gas phase flow smoothly.
Summary of new vertical sieve tray structure[J].