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Study on photochromic properties of 1-(2-methoxyphenyl)-2- [2-methyl-5-(1,3-dioxolane)-3-thienyl]perfluorocyclopentene Haixin Ding, Hongjing Jia, Congbin Fan* and Gang Liu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
Its photochromic and simulated molecule structure were also investigated in detail.
Synthesis of diarylethene 1o Results and Discussion DFT investigation of the molecule structure We have investigated the structure in gaseous using quantum chemical calculations with density functional theory (DFT) in b3lyp/6-31g lever.
The optimized structure shows that the methyl and methoxyl groups are located on opposite sides of the double bond, reflected in the torsion angles C12 C21 C26 C27 [45.61o] and C26,C27, C29,C28 [51.21o], and are thus trans with respect to the double bond.

The phase structure, microstructure and optical properties were characterized by XRD, SEM, EDAX, PL, PSL and TL, respectively.
As an important ABO4-type complex oxide, SrSO4 has attracted much attention in recent years and much work has been focused on the synthesis of these special homogeneous structures [1,2].
In many reported references, SrSO4 is mainly prepared by solid-state method and few investigations are concerned with the “soft chemistry” synthesis method [3–5].
Results and Discussion SrSO4 host material has a orthorhombic crystal structure and its lattice parameter values are as a=8.389Å, b =5.365Å, c=6.885Å and space group Pnma (62) [7].
Therefore, appropriate doping and substitution will not affect the phase formation and pure-phase crystal structure.

According to the theory and the fabricating process of the film, the structure of the self-cleaning film for large solar cell array was designed.
Structure of the electric curtain Summary Although some methods for self-cleaning have been mentioned by many researchers, especially, the application for lunar and Martian exploration, less research about self-cleaning for the solar cell array in atmospheric environment has been performed.
Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference , P 512-520, 2007 [6] Park Y B, Im H, Im M, et al.
Self-cleaning effect of highly water-repellent microshell structures for solar cell applications[J].
Journal of Materials Chemistry, 2011, 21:633–636

The investigated structure consists of a pair of triangular gold nanoparticle on SiO2 substrates, which is shown in Fig.1.
All the structures have the same tip-angle (60 degree) and same thickness h = 20 nm.
The Total Field-Scattered Field (TFSF) source with horizontal polarization (along the x-axis) are used as light source, which propagates from the bottom of the structure to the top.
The redshifted amplitude is in agreement with experimental results of comparable gold nanoparticle structures[10].
Lide: CRC Handbook of Chemistry and Physics (CRC press, 2004) [10] S.

Introduction The structure of overhead crane is simple and its capacity is big.
Its value is related to the structure parameter of system, therefore, we use a single nerve dollar to adjust it, and to increase control ability of the system.
Single Nerve Dollar Controller Structure Using difference from reference speed and load speed as input , the single nerve dollar controller has adaptive capability to control output Km by the controller so that the difference can be reduced with changing Km.
The structure of the single nerve dollar controller, as show in figure 4.
Gudi: Industrial and Engineering Chemistry Research, Vol.196 (2002), pp.538-552

Preparation and Evaluation of Polymeric Pour Point Depressant for Crude Oil Xuefan Gu, Yun Ma, Gang Chen* College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, China E-mail: gangchen@xsyu.edu.cn Keywords: polyacrylate ester, synthesis, pour point depressant, crude oil Abstract.
The waxes generally crystallize as an interlocking network of fine sheets, thereby entrapping the remaining fuel in cage-like structures.
All pour point depressants are structured so that part of the molecules is like the paraffin wax crystals, while the other high polar part of the structure, dissimilar to the wax crystals, blocks the extensive growth of the wax.
Table 1 Effect of PAE on the pour point of crude oil PAE Δ pour point (℃) 1# 2# 3# 4# PAE12 6 13 7 10 PAE14 3 0 5 6 PAE16 2 8 0 7 PAE18 2 10 8 10 Generally, a cold flow improver contains an oil-soluble long-chain alkyl group and a polar structure moiety in the molecular structure.

Introduction The nonlinear partial differential equations (NPDEs) are widely used to describe complex phenomena in various fields of sciences, such as physics, biology, chemistry, etc.
:General solution and fractal structures for the (2+1)- Dimensional Generalized Ablowitznm-Kaup-Newell-Segur system.
[2] Ma, Z.Y.Zheng,C.L.: Two classes of fractal structures for the (2+1)-dimensional dispersive long wave system.
B (2006)15(01):0045-0052 [3] Zheng,C.L.Zhang,J.F.: Excit solutions and abundant coherent soliton structures of (2+1)- dimensions Ablowitznm-Kaup-Newell-Segur system.
Commun Theor Phys.(2004)41(5):671-674 [5] Zheng, C.L.: Coherent soliton structures with chaotic and fractal behavious in a generalized (2+1)-dimensional korteweg de-vries system.

Introduction The various sorts of cement, which are nowadays widely applied, are based on different types of clinkers such as the calcium sulfoaluminate (CSA) or belite structure [1].
In both cases there is strong interference in the structure of the cement matrix and therefore its degradation [2, 3].
After one day of water storage the structure of ettringite can be considered as fully consolidated.
Gazdic, Study of belite structure changes influenced by potassium, Ceram.
Taylor, Cement chemistry, Published by Thomas Telford Publishing (1997), ISBN: 0-7277-2592-0.

Preparation and Properties of Gadolinium Homoleptic Double- and Triple-Decker Complexes Containing Tetrabenzoporphyrin Ligand Liu Qifeng College of Chemistry and Chemical Technology, Shangqiu Normal University, Shangqiu, Henan, 476000, China lqf8672@126.com Keywords: Tetrabenzoporphyrin(TBP); sandwich-like complexes; gadolinium metal; triple-deckers; double-deckers Abstract: Two novel gadolinium sandwich-type complexes containing tetrabenzoporphyrin (TBP) ligands- Gd(TBP)2 and Gd(TBP)3 were prepared from porphyrin 1 and Gd(acac)3. nH2O under Ar by boiling 1, 2, 4-Tcb for 15~17h and 45~48 h respectively.
Their structures are characterized by Uv-Vis, HR-MS and IR.
Whereas the chemistry and properties of homoleptic sandwich complexes with the same pophyrinato ligands of various lanthanide, actinides and group 4 transition metals have been extensively studied[4], and the heteroleptic analogus containing mixed macrocyclic ligands have also been described[5-6] for an intensive investigation of the π-π interactions, actually all of them are confined to the sandwich-type complexes containing meso-substituted porphyrin ligands except for octaethylporphyrin (OEP) or octamethylporphyrin (OMP).
Mass (m/z) corresponding to the most abundant isotopic peak of the molecular ion of Gd (TBP)2 for C72H40GdN8 is calculated as 1174.2611 and found to be 1174.2636, and mass (m/z) corresponding to the most abundant isotopic peak of the molecular ion of Gd (TBP)3 for C108H60Gd2N12 is calculated as 1840.3540 and found to be 1840.3561, which both confirm the identity of their molecular structure.
Their structures are characterized by Uv-Vis spectra and HR-MS.

From XRD pattern we confirmed the face centered cubic (fcc) structure of the synthesized NiO nanoparticles.
Main crystallographic planes in the XRD pattern are (001), (100), (101), (110) and (111) for Ni(OH)2 which confirms the hexagonal structure of the dried powder (JCPDS NO. 01-1047).
The diffractogram of NiO nanoparticles is indexed based on cubic system shown in figure 2 and the peaks appearing at 2θ = 37.38°, 43.42°, 63.02°, 75.53° and 79.54° are indexed as (111), (200), (220), (311) and (222) respectively and represents pure bunsenite face centered cubic (FCC) crystalline structure of nickel oxide.
Aloysius Sabu, Boby Sabu, Thomas Varghese, Nanosystems: physics, chemistry, mathematics, 5 (3) (2014) 441-449
Amritphale, International Research Journal of Pure &Applied Chemistry. 3(2) (2013) 111-117