Search results

Synthesis and Characterization of A Novel Tetra-substituted Zinc Phthalocyanine Compound Wei Zhang 1,2,a, Wubiao Duan 3,b and Zhenxin Wang 2,c,* 1Key Laboratory of Functional Inorganic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China 2State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China 3Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, China azhangwei19860526@163.com, bwbduan@bjtu.edu.cn, cwangzx@ciac.jl.cn Keywords: Tetra-substituted phthalocyanine zinc, PEG, Synthesis, Characterization.
Introduction Phthalocyanine (Pc) is one of most intensely studied macrocyclic compounds in modern dye industry and coordination chemistry [1].
Since they are 18π-electron structure planar molecules, Pcs are full-aromatic, which are capable of several classical displacement reactions, and substituted with a great number of functional groups.
It has been found that suitable functional groups in the peripheral benzene rings of the Pc structure can improve the solubility of these compounds.

González1, d, ¶ 1 Department of Chemistry, Faculty of Sciences, Universidad de Chile, P.O.
Results an Discussion Molybdenum disulfide is a lamellar solid which has a wide and interesting intercalation chemistry.
Schematic representation of the intercalation of hexadecylamine in MoS2 In contrast to molybdenum disulfide, vanadium pentoxide normally has a tridimensional structure.
Li, Chemistry-A European Journal 9 (2003) 2726 [5] R.
Tenne, Chemistry-A European Journal 8 (2002) 5297 [9] E.

China 2College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P.R.
China 3College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P.R.
ZR2010BL025), Open Project of State Key Laboratory of Supramolecular Structure and Materials (No.sklssm201323)(Jilin University) and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (No. 2011-13)(Jilin University) References [1] L.
Wang et al.: Chinese J. of Chemistry, Vol. 19(2001) No.7, p.675
Wang et al.: Analytical Chemistry, Vol. 30 (2002) No.1, p.125.

Both DE chemistries are compatible with HKMG materials, e.g.
The DE performance has also been investigated on a TiN trench structure.
The HPM-HCl DE has been applied on the ALD-TiN, that has been deposited on a silicon line and space structure.
Figure 7: (a) Cross section and tilted view SEM images of TiN trench structures before and after the HPM-HCl DE, (b) estimated etch amount of TiN at the trench top, bottom and sidewall.
In addition, HfO2 does not dissolve in the non-fluorine contaning DE chemistries.

A summary of the crystallographic data and structure refinements for 1 is given in Table 1.
Results and Discussion 3.1 Crystal structure of 1.
Lehn: Supramolecular Chemistry (VCH, New York 1995)
Vögtle: Supramolecular Chemistry (Wiley Chicester 1991)
Lehn: Comprehensive Supramolecular Chemistry (Pergamum, New York 1996)

Synthesis and Biological Activities of Sulfonated Polysaccharides Having Pentofuransidic Structures B.
To examine the structure-biological activity relationships of sulfonated polysaccharides, it is important to synthesize sulfonated polysaccharide having defined structure.
And, commercially available xylan having (1�4)-β− pyranosidic structure was also sulfonated.
Thus, the sulfonated pentofuranans having flexible backbone structure might be apt to the interactions with the blood coagulant factors rather than the sulfonated xylan having rigid backbone structure.
Schuerch, (1981), Advances in Carbohydrate Chemistry and Biochemistry, edited by R.S.

Determination of molecular weight and structure characterization of canna amylose purified using the method of n-butanol recrystallization Haixin Shi, Yanzhen Yin, Xiaoxi Hu and Shufei Jiao College of Chemistry and Chemical Engineering, Qinzhou University, Qinzhou, Guangxi, P.
The absorption peak near 995 cm-1 was corresponding to the orderly hydrogen bonds structure between the hydroxyl of dehydration of glucose units and the hydroxyl of starch and related to the crystalline structure of starch.
Paschll: Starch chemistry and technology (China Food Press, Beijing 1987)
Iodine sorption: “blue value”, in: Methods in Carbohydrate Chemistry, edtied by R.L.
[23] C.T.Greenwood: in: Methods in Carbohydrate Chemistry Ⅳ Starch, edited by R.

The paper is rising the question of fundamental problem - the structuring the nanosuspension, that might shed a light on the possibility of "engineering" the structure of a liquid by controlling and regulating the degree and nature of intermolecular interaction.
Among various approaches related to the synthesis of nanomaterials, wet chemistry methods, which use the facilities of colloids chemistry and emulsions, have a number of advantages.
Nanopowder of Nd:YAG was obtained by a wet chemistry method [11].
These results indicate the formation of a more solid structure of nanosuspension in comparison with the pure liquid.
Shear elasticity and strength of the liquid structure by an example of diethylene glycol, Technical physics 62 (2017) 14-17

The effect of mineral admixture and curing condition in pore structure of concrete was studied in this paper.
Due to these effects, pore structure in concrete changes.
Curing condition also take effect on pore structure due to ionic equilibrium in pore solution.
Hewlett, in: Lea’s Chemistry of Cement and Concrete, edited by John Wiley & Sons Inc., New York, 1998, in press
[7] Taylor HFW in: Cement chemistry, edited by Academic Press, London, 1990.

Low Temperature Synthesis of TiO2 from Acid Solution Soichiro Watanabe 1,4, Sae Nakajima 1, Kazuyoshi Uematsu 2, Tadashi Ishigaki3, Kenji Toda 1,3 and Mineo Sato 2,3 1 Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan 2 Department of Chemistry and Chemical Engineering, Niigata University, Niigata 950-2181, Japan 3 Center for Transdisciplinary Research, Niigata University, Niigata 950-2181, Japan 4 KOSE Corporation, 48-18 Sakae-cho, Kita-ku Tokyo, 114-0005, Japan Keywords: Soft Chemistry, Low temperature synthesis, Titanate, Rutile ABSTRACT Fine TiO2 particles were synthesized from titanate precursor, Na16Ti10O28, dissolved in aqueous HNO3 solution.
In the previous study, we have reported the crystal structure of layered perovskite compounds, NaLnTiO4 (Ln = lanthanide metals), and dissolution behavior to aqueous HNO3 solutions.[3-6] Crystalline rutile TiO2 powders were obtained by evaporation of the aqueous HNO3 - NaLnTiO4 solution at 90 ºC.
Fig.1 shows crystal structures of the titanate precursors obtained with single phase.
Table 1 List of titanate precursors Samples Ratio of Ti:Na Phase composition after heart treatment Solubility in aqueous HNO3 solution 1 12 : 2 Na2Ti6O13 + TiO2 - 2 9 : 2 Na2Ti6O13 + TiO2 - 3 6 : 2 Na2Ti6O13 Insoluble 4 4 : 2 Na2Ti6O13 + Na2Ti3O7 - 5 3 : 2 Na2Ti3O7 Insoluble 6 10 : 16 Na16Ti10O28 Soluble (a) (b) (c) Fig.1 Crystal structure of titanate precursors; (a) Na16Ti10O28, (b) Na2Ti3O7, (c) Na2Ti6O13 The precipitate was obtained by reflux at 80 ºC from Na16Ti10O28 aqueous HNO3 solution.
It was reported that TiO2 prepared by the hydrothermal method have different crystal structures and various morphologies, depending on the hydrothermal conditions.[8] It could be concerned with the composition and structure of Ti complex ion in hydrothermal solution.