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Introduction The Schiff base compounds constitute an important class of ligand which has been extensively investigated in coordination chemistry mainly due to their facile synthesis and easily tunable steric, electronic, and catalytic properties.
They are also useful in constructing supramolecular structures [1-2].

The water absorbency increased with the increase of the amount of initiator, because more graft polymerization occurred and more stable network structures formed.
Flory:Principle of polymer chemistry.

Synthesis and Photochromism studies of 1-(2-methyl-3-benzothiophenyl)-2-[2-methyl-5-(4-azidomethyl)-3-thienyl]perfluorocyclopentene Yongjuan Tang, Hongyan Xu and Shouzhi Pu* Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013, P.R.China pushouzhi@tsinghua.org.cn Keywords: Diarylethene, Photochromism, Electrochemical Abstract: An unsymmetrical photochromic diarylethene 1-(2-methyl-3-benzothiophenyl)- 2-[2-methyl-5-(4-azidomethyl)-3-thienyl] perfluorocyclopentene was synthesized, and its optoelectronic properties were also investigated.
The structures of diarylethene 1o were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 2.13 (s, 3H, -CH3), 2.32 (s, 3H, -CH3), 4.51(s, 2H, -CH2), 6.58 (s, 1H, thiophene-H), 7.32 (d, 1H, J = 8 Hz), 7.44-7.51 (m, 2H, J = 8 Hz), 7.65 (d, 1H, J = 8 Hz) Scheme 2.

Study of the effect of diatomite as a partial replacement of cement in cement pastes ZAHALKOVA Jana1,a, ROVNANIKOVA Pavla1,b 1Brno University of Technology, Faculty of Civil Engineering, Institute of Chemistry, Veveří 331/95, 602 00 Brno, Czech Republic azahalkova.j@fce.vutbr.cz, brovnanikova.p@fce.vutbr.czl Keywords: Diatomite, amorphous SiO2, pozzolanic activity, cement, mechanical properties.
There are many reasons for the use of diatomite in filtration such as; its high porosity and bulk volume, its porous and permeable structure, its resistance to chemicals and high purity, large filtration surface area, its good adsorption properties especially for oils and micro-organisms [3].

A highly selective chemosensor probe for Ag+ in 50% THF/H2O Liangrong Zhao, Ping Shen, Xuqin Zhan, Mingxun Yan, Changying Yang* College of Chemistry and Life Science, Three Gorges University, Yichang 443002, China yangcy12@gmail.com Keywords: Diethyl6-anilino-5H-2,3-dithia-5,7-diazacyclopenta(cd)indene-1,4-dicarboxylate (D1); Deprotonation; Chemosensor; Ag+ Abstract.
Structures of D1.

Recovery of Silica and Sodium Fluoride from Hexafluorosilicic Acid and Sodium Silicate Jong-Kil Kim 1,a, Jin-Koo Park2,b and Ho-Kun Kim 1,c 1 Dept. of Applied Chemistry, Hanyang University, Ansan, 425-791, Korea 2 Korea Institute of Limestone & Advanced Materials, Danyang 395-903, Korea a k3289@hanyang.ac.kr, bsky3013@hanmail.net, chkkim@hanyang.ac.kr Keywords: Sol-gel process; nanoporous silica; hexafluorosilicic acid, sodium silicate Abstract.
To get purer silica and NaF, the concentration ratios of the initial compounds were controlled, and then investigated the physical(surface and pore structures) properties of the obtained silica.

Fig.1 Thermal stability of crude CDA The influence of pH on CDA stability The pH can change of enzyme conformation and the active site of enzyme molecule structure.
[7] Roberts GAF. in: Chitin Chemistry, Macmillan Press, U.K. (1992)

Synthesis and Properties Study of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(9-phenanthrene)-3-thienyl]perfluorocyclopentene Jingjing Liu, Hongjing Jia and Shouzhi Pu* Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013, P.R.China pushouzhi@tsinghua.org.cn Keywords: Diarylethene, Photochromism, Pyrimidine, Fluorescence.
The structure of diarylethene 1o was confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 2.13 (s, 3H, -CH3), 3.78 (s, 3H, -OCH3), 3.98 (s, 3H, -OCH3), 7.02 (s, 1H, thiophene-H), 7.51-7.65 (m, 4H, benzene-H), 7.71 (s, 1H, benzene-H), 7.81 (d, 1H, J = 8.0 Hz, benzene-H), 8.07 (d, 1H, J = 8.0 Hz, benzene-H), 8.32 (s, 1H, pyrimidine-H), 8.61 (d, 1H, J = 8.0 Hz, benzene-H), 8.63 (d, 1H, J = 8.0 Hz, benzene-H).

Research on Photochromic Compounds with Synthesis and Photochromism of 1-(2-methyl-3-benzofuryl)-2-{2-methyl-5-[4-formyloxyethyl (Rhodamine-B)] phenyl-3-thienyl} Perfluoroyclopentene Dandan Xue, Guanming Liao, Chunhong Zheng* and Shouzhi Pu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R.China zch722108@126.com Keywords: Diarylethene; Photochromism; Rhodamine B; Photochromic reaction kinetics Abstract.
The structure of compound 1o was confirmed by 1H NMR (400 MHz, CDCl3): δ 1.07 (t, 12H, J = 7.0 Hz), 1.83 (s, 3H), 2.07 (s, 3H), 3.20–3.25 (m, 8H), 3.54 (t, 2H, J = 6.0 Hz), 3.94 (t, 2H, J = 6.0 Hz), 6.11–6.14 (m, 2H), 6.30 (d, 2H, J = 1.2 Hz), 6.38 (s, 2H), 6.99–7.01 (m, 1H), 7.16 (s, 1H), 7.21 (s, 1H), 7.33–7.40 (m, 5H), 7.44 (s, 1H), 7.46 (s, 1H), 7.83 (s, 1H), 7.85–7.88 (m, 2H).

Yücel1 1 Istanbul Technical University, Faculty of Chemistry and Metallurgy, Department of Metallurgical and Material Engineering, 34469, Maslak, Istanbul, Turkey 2 Istanbul Technical University, Prof.
Having wurtzite structure and being made up of relatively light elements, it was predicted and experimentally verified that AlN should have a high thermal conductivity value.