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The structure of the coronavirus is similar to the nanoparticles.
The gold nanoshell structure consisting of dielectric silica gels encased within a thin, hollow and outer gold shell have been developed.
Poon, “Molecular diagnosis of a novel coronavirus (2019-nCOV) causing an outbreak on pneumonia” Clinical Chemistry, 66 (4), (2020) 549-555
Lee, “Recent advances in gold nanoparticles for biomedical applications: from hybrid structures to multi-functionality”, J.
Parekh, “Linking graphene-based material physicochemical properties with molecular adsorption, structure and cell fate”, Communications Chemistry, 3 (2020)

Analyzed the structure of products via Fourier transform infrared spectrometer, then to test the water-soluble and stability.
Infrared Spectrum The structures of the products were characterized qualitatively by IR.
Department of Chemistry and Material, 2011, 26(2): 32-35

Ruthenium-Catalyzed Cascade Ring-Opening Polymerization/Hydroboration for the Synthesis of Low Cross-linking Poly (6-norbornenyldecaborane) and Its Thermal Property Jun-peng LI1,a*, Han YANG2, Yun LIANG1, Jia-lin CHEN1, Ming XIE1, Lin-min ZHOU1, Qing-feng XIONG1, and Wen-lin LI 1 1 State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Kunming Institute of Precious Metals, Kunming, Yunnan, 650106, China 2 Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices Hubei University of Art and Science, Xiangyang, Hubei, 441053, China a junpengli.chemistry@gmail.com *Corresponding author Keywords: Ruthenium-catalyzed, Hydroboration, char yield, Thermal resistance, One-pot Abstract.
Based on the ruthenium-catalyzed cascade ring-opening polymerization/hydroboration reaction, the poly (6-norbornenyldecaborane) was obtained with well-defined structure, the final char yield is up to 81%.
Results and Discussion Considering the structure of poly (6-norbornenyldecaborane), we can see that the polymer main-chain possess many double bonds, which might led the polymer cross-linking under light or air atmosphere.

Chicken feathers are known for its unique properties such as low density, warmth retention, and distinct morphological structure [1].
The infrared absorption bands by the sample versus wavelength identifies the molecular components and structures of the material.
Moreover, peaks at 3500-3200 cm-1, 2960-2200 cm-1, 1730-1200 cm-1, 1690-1521 cm-1 and 1400-1050 cm-1 confirms the presence of protein conformation and backbone structure of the keratin [13].
[19] Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book).
Cambridge: The Royal Society of Chemistry. 2014. pp. 841, 844. doi:10.1039/9781849733069-FP001 [20] S.

The properties of electrospun fibers and hydrogel films were evaluated in terms of morphology, chemical structure, swelling behavior and release profiles.
Chemical structure examined by Fourier Transform Infrared Spectrometer (FTIR) with Nicolet model Nicolet iS5.
This is because aloe vera extract affected the porous surface extension so water molecules fast diffusion into the structure.
Enferadi, FT-IR study of the polysaccharides isolated from the skin juice, gel juice, and flower of Aloe vera tissues affected by fertilizer treatment, Organic and Medicinal Chemistry Letters, 2012, pp. 1-9
Mohy-Eldin, Poly (vinyl alcohol)-alginate physically crosslinked hydrogel membranes for wound dressing applications: Characterization and bio-evaluation, Arabian Journal of Chemistry, 2015, pp. 38-47

The change in film structure leads to an increase in real surface area.
Similar change in structure has been observed in ZnO films by magnetron sputtering [13].
The structure change can be attributed to the increase of nucleation probability with the increasing RF power.
It means a large number of small grains can grow simultaneously and finally result in small grain structure.
Yang: Materials Chemistry and Physics.

The self-assembled structures were reorganized to thermodynamically stable morphologies upon annealing above glass transition temperature (Tg).
Many applications that exploit copolymer morphology as scaffolds and templates for nanostructures with periodicities from 1 to 50 nm are emerging that make use of the unique chemical structure of each block and the ability to carry out chemistry within one domain selectively [3].
The structure was more ordered and clearly delineated at 100 oC (Fig. 1c).
With higher temperature, the micro-separated phase became more uniform structure (Fig. 2c).
The self-assembled structures rearranged into thermodynamically stable morphology upon aging above their glass transition temperature.

Quantitative structure–property relationship (QSPR) modeling is a powerful approach for predicting the properties of environmental organic pollutants from their structure descriptors.
Three-dimensional holographic vector of atomic interaction field (3D-HoVAIF) is used to describe the chemical structures, SMR-PLS QSAR model has been created and good correlation coefficients and cross-validated correlation coefficient is obtained.
In this study, 3D-HoVAIF method is used to describe the chemical structures, SMR-PLS QSAR model has been created and good correlation coefficients and cross-validated correlation coefficient is obtained.
Calculation for 3D-HoVAIF descriptors of PCDD/Fs Original spatial structures of the 212 PCDD/Fs molecules are autogenerated by software Chemoffice 2004, and then optimized preliminarily using semi-empirical quantum chemistry soft MOPAC in Chem 3D at AM1 level (energy cut-off:0.001 kJ·mol-1).
Conclusions The Structure descriptor of PCDD/Fs is generated by three-dimensional holographic vector of atomic interaction field (3D-HoVAIF) method.

Institute of applied chemistry, Shenyang university of chemical industry, Shenyang,110142, China axiaocyu@dlou.edu.cn, bzhupengfei851@163.com, cyuexiachen@126.com, djunwang@126.com, eanzhongfu@126.com Key words: modified nano-TiO2，Nano-Sn0.25Ti0.75O2，Photocatalytic, wastewater containing Cd2+ Abstract:Nano-Sn0.25Ti0.75O2 was prepared with hydrothermal method using tetrabutyl titanate as one of the primary raw materials.
The products were characterized by XRD and SEM, which revealed that the crystal structure of Sn4+-doped nano-TiO2 is rutile, and the nanoparticles diameter was 14.49nm.
The crystal structure of Sn0.25Ti0.75O2 was determined by X-ray diffraction (XRD).
The nano-Sn0.25Ti0.75O2 as photocatalyst was prepared via hydrothermal method, and the characteristic of the nano- Sn0.25Ti0.75O2 was performed with XRD and SEM, which suggested that the crystal structure of the photocatalysts remained in the rutile form.
[7] J Liqiang，W Baiqib，X Baifu.Journal of Solid State Chemistry.2004 177:4221-4227; [8] A.

Introduction Sonogashira coupling of terminal alkynes with halogenated aromatic compounds, is an effective way to synthesize conjugate alkynes and substituent alkynes, which has been widely used in natural compound chemistry, pesticide chemistry, medicinal chemistry, new type material and nano-molecular devices [1].
It can been seen that the alkyl chain length on para position of phenylacetylenes gave little effect on the reaction results(entry1,5), while the structure of the phenyl iodide had a great influence on the reaction results, armatic iodide with electron withdrawing group at ortho and para position reaction successfully, and the high pure products were always obtained with high yield(entry 9,10), while armatic iodide with electron donating group (1,2,5-9) at ortho and para position gave a little low conversion and yield.