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A novel biocompatible Fe2+-chitosan (CTS)/citric acid modified carbon nanotube (CA-CNTs) composite (Fe2+-CTS/CA-CNTs) has been successfully synthesized by covalent bonding and crosslinking chemistry, followed by the reduction.
In the present work, a novel biocompatible Fe2+-CTS/CNTs composite has been synthesized by covalent bonding and crosslinking chemistry, followed by reduction, and its application potential for MRI contrast agents is proposed.
To further confirm the structure of Fe2+-CTS on the surface of CA-CNTs, Fe2+-CTS was also prepared under the same conditions and analyzed by UV-Vis spectrum technique, and the results are shown in Fig.4.
Table 1 Magnetic parameters of Fe2+-CTS/CA-CNTs with different contents of Fe2+ ions (wt %) Fe2+ content (wt %) Ms (emu/g) Mr (emu/g) Hc (Oe) Mr/Ms 3.4 2.57 0.15 763 0.057 2.6 1.43 0.08 218 0.059 0 0 0 - - Conclusions We have demonstrated that the Fe2+-CTS/CA-CNTs composite has been successfully synthesized by covalent bonding and crosslinking chemistry, followed by the reduction.

Figure 1: General structure of montmorillonite [15].
The selection of the most suitable polymer matrix along with nano structured clay is needed of the hour.
Freeman, "Materials selection guidelines for membranes that remove CO2 from gas mixtures," Journal of Molecular Structure, vol. 739, pp. 57-74, 2005
Polypropylene and Polystyrene Nanocomposites " Chemistry of Materials, vol. 12, pp. 1866-1873, 2000
Ray, "Rheology of Polymer/Layered Silicate Nanocomposites," Journal of Industrial and Engineering Chemistry, vol. 12, pp. 811-842, 2006

So doping is an effective way to suppress the cycloidal structure of BFO.
So, the crystal structure of all samples is rhombohedral perovskite structure with space group R3c.
[5] N.A.Hill, Why Are There so Few Magnetic Ferroelectrics, Journal of Physical Chemistry B. 104 (2000) 6694-6709
Yuan, et al, Structure, Magnetic, and Ferroelectric Properties of Bi1-xGdxFeO3 Nanoparticles, J.
Rout, et al, Effect of holmium substitution for the improvement of multiferroic properties of BiFeO3, Journal of Physics and Chemistry of Solids. 71 (2010) 1557-1564

Tel: 27-12-4202527, Fax: 27-12-4204687 2Department of Chemistry, PO Box 339, University of the Free State, Bloemfontein, 9300, South Africa.
The electrochemical behaviour is supported by the quantum chemistry DFT calculations.
Ludvík, Synthesis and electrochemical study of iron, chromium and tungsten aminocarbenes: Role of ligand structure and central metal nature, Electrochim.
Holler, Fundamentals of Analytical Chemistry (7th edition), Saunders College Publishing, Fort Worth, 1991, p.468-469
Conradie, Electrochemical behaviour and structure of novel phosphine- and phosphite substituted tungsten(0) Fischer carbene complexes, Electrochim.

Hyperbranched Polysiloxane Functionalized Graphene Oxide via Polyhydrosilylation Mengmeng Zhanga, Hongxia Yan*b, Chao Gongc, Yichen Fengd Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’An, Shaanxi, 710129, P.R.
The changes in GO surface morphology, chemistry and physical conditions at different stages are characterized by Fourier-transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy (TEM).
Similarly, Yu and Dai [7] have modified graphene with poly(ethyleneimine) obtaining a water-soluble product that was subsequently assembled with acid-treated carbon nanotube to form hybrid carbon films with interconnected carbon structures of well-defined nanoscale pores.
Compared to the linear polymers, hyperbranched polymers are special kinds of polymers with highly branched structure, they have good solubility, low melt viscosity, and extremely high density of functional groups, so they can be utilized advantageously as surface modifiers [9].
Among reported hyperbranched polymers so far, hyperbranched polysiloxanes are beginning to attract interests as new organic inorganic hybrid materials because they combine the unique chemical structure of polysiloxane and hyperbranched topology structure, and thus possesses low viscosity, high reactivity and excellent thermal properties [12].

Crystalline Phase Structure.
Pemble, Journal of Photochemistry and Photobiology A: Chemistry, 2006.
[23] Baimei Wen, Chunyen Liu, and Yun Liu, Inorganics Chemistry 2005.
Yates, Journal of Photochemistry and Photobiology A: Chemistry, 2007.
[66] Baomei Wen, Chunyan Liu, and Yun Liuy, Chemistry Letters, 2004.

Finally, the crystal structure of AgNRs was analyzed using XRD with a scanning 2θ in the range of 30-90°.
The silver nanorods location of (111) was preferred because, in the fcc lattice structure, the atom density of {111} crystal surface was 91.04% [17].
Zhang, S.Wu, Wet chemical synthesis of ag nanowires array at room temperature, Chemistry Letters 34 (4) (2005) 510-511
Jinfeng, Study on the growth mechanism of silver nanorod in the nanowire-seeding polyol process, Material Chemistry and Physics 107 (2008) 13-17
Huang, The concentration effect of capping agent for synthesis of silver nanowire by using the polyol method, Journal of Solid State Chemistry 214 (2014) 2-6.

Effect of Carrier on the Structure and performance of Polyphenylene Sulfide Fiber Xiao feng Xu1, Qing kang Zheng1,a and Jin qu Zheng1 1.
In this work the effects of benzyl benzoate as a carrier on the structure and performance of PPS especially dyeability were evaluated.
Standard affinity is related with the structure of the fibers and dyes under certain external conditions.
The enhanced value of standard affinity of treated PPS fiber indicated that the structure of the PPS fiber was changed.
S.Salvin: Amer Dyestuff Rep. 49 (1960), p. 600 [3] T .Vickerstaff: The physical chemistry of dyeing(Oliver&Boyd,London1954) [4] I.D.Rattee,M.M.Breuer:The physical chemistry of dye adsorption(Academic Press,London1974)

The Cr (III) ion can form octahedral structures and the ligands attached to it provide compounds of different colors.
To develop a catalyst, computational chemistry is used to understand the reaction mechanisms in atomic levels.
The quartet state is found to be the most stable structure for all calculations.
The TDDFT method was applied to study the adsorption wavelengths for the excited trans- and cis-structures.
Theopold, The shortest metal-metal bond yet: Molecular and electronic structure of a dinuclear chromium diazadiene complex, J.

Hungary 8 Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, H-1111 Budapest, Szt.
Hexagonal tungsten trioxide, h-WO3 is one of the most researched tungsten oxides due to its open-tunnel structure and intercalation chemistry.
During heating this bronze, NH3 and H2O are released and a hexagonal tungsten oxide structure remains.
When 1 was heated in air, the product sample 2 showed an almost fully oxidized structure.
We measured the amount of NH4+ ions and NH3 molecules, which remained in the solid structure, by solid-state 1H-MAS NMR spectroscopy [18].