Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles

Kang, Hyo Sim; Oh, Sun Wha; Kang, Young Soo

doi:10.4028/www.scientific.net/SSP.119.39

文章题目

Fabrication of Nanoparticles Supported on Metal Oxides by PS-PVP Block Copolymer Encapsulation Method
p.17

Synthesis of CdS Nanocrystallites in Polymer Matrix: Sui-Generis Approach
p.21

Nanostructured Thin films of Anthracene by Liquid-Liquid Interface Recrystallization Technique
p.27

Spark Plasma Sintering of Nanoscale (Ni+Al) Powder Mixture
p.35

Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles
p.39

Characterization of Nano Scaled Mullite Powders Prepared by Organic-Inorganic Solution Technique
p.43

Preparation and Characterization of Anti-Fogging Low Density Polymer Film
p.47

Ion Conducting Behaviors of Polymeric Composite Electrolytes Containing Mesoporous Silicates
p.51

Preparation and Characterization of Activated Carbon Nanofiber Webs Containing Multiwalled Carbon Nanotubes by Electrospinning
p.55

首页Solid State PhenomenaNanocomposites and Nanoporous Materials VIIComparison of Optical Properties of Pyrazoline...

Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles

摘要:

We prepared various pyrazoline derivatives which possess dimethylamino-, ethoxy-, isopropyl-phenyl ring at the 5-position of pyrazoline. The nanoparticles of pyrazoline derivative ranging from tens to hundreds of nanometers by the reprecipitation method have been successfully prepared and their optical size-dependent properties have been investigated with UV-vis, fluorescence spectroscopy, DLS (Dynamic Light Scattering) and SEM. The size-dependent optical properties of pyrazoline organic nanoparticles have been observed in the order of dimethylamino- > ethoxy- > isopropyl- in electro-donating characters.

信息:

期刊:

Solid State Phenomena ( 119卷)

主题:

Nanocomposites and Nanoporous Materials VII

编辑:

Chang Kyu Rhee

页数:

39-42

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.119.39

引用:

H. S. Kang et al., "Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles", Solid State Phenomena, Vol. 119, pp. 39-42, 2007

上线时间:

January 2007

作者:

Hyo Sim Kang, Sun Wha Oh, Young Soo Kang

关键字:

Organic Nanoparticles, Pyrazoline, Reprecipitation Method, Size-Dependent

输出:

RIS, BibTeX

价格:

$38.00

允许:

请求权限

添加到购物车

论文参考

[1] E. Hanamura: Phys. Rev. B, Vol. 37 (1988), p.1273.

[2] R. Micheletto, H. Fukuda and M. Ohtsu: Langmuir, Vol. 11 (1995), p.3333.

[3] N.D. Denkov, O.D. Velev, P.A. Kralchevsky and I.B. Ivanov: Nature, Vol. 26 (1993), p.136.

[4] Y.R. Huang and J.A. Katzenellenbogen: Org. Lett., Vol. 2(18) (2000), p.2833.

[5] X.H. Zhang, W.Y. Lai, Z.Q. Gao, T.C. Wong, C.S. Lee, H.L. Kwong, S.T. Lee and S.K. Wu: Chemical Physics Letter, Vol. 320 (2000).

[6] S.W. Oh, D.R. Zhang and Y.S. Kang: Mater. Sci. Eng. C, Vol. 24 (2004), p.131.

[7] S.W. Oh and Y.S. Kang: Colloids and Surface A: Physicochem. Eng. Aspects, Vol. 257-258 (2005), p.415. Functional group λmax (nm) of Uv-vis λmax (nm) of fluorescence emission -N(CH3)2 30 90 -O-CH2CH3 25 43 -CH(CH3)2 20 20.

文章题目页数

Sedimentation Properties of TiO₂ Nanoparticles in Organic Solvents

作者: S.H. Woo, Min Ku Lee, Chang Kyu Rhee

摘要: In this study, the colloidal stability and sedimentation behavior of crystalline TiO2 particles (∼300nm) in various organic solvents have been investigated by means of a backscattered light flux profile (Turbiscan) and a zeta potential measurement. The backscattered light flux profiles revealed that the TiO2 nanoparticles were readily sedimented in water, methyl alcohol, and ethyl alcohol due to a flocculation-induced particle growth, while a particle coalescence and a sedimentation of the TiO2 nanoparticles were hardly observed in isopropyl alcohol. The measured ζ potentials verified the differences of the colloidal stabilities of the TiO2 particles in the organic solvents, showing a good correlation with the migration velocity.

267

Green Preparation of an Environment-Responsive Polymer

作者: Qian Hou, Zhao Zhang, Ting Ting Yang, Yan Zhang

摘要: Smart polymers are very important in many fields, such as biochemistry, fine chemicals and functional materials, etc. In this paper, poly (N-isopropyl acrylamide) (PNIPAm) was prepared by ultrasonics sonochemistry. In the reaction system, the monomer is N-isopropyl acrylamide (NIPAm), the crosslinker is N,N'-methylenebisacrylamide (BIS) and the solvent is tetrahydrofuran (THF). FTIR and UV-Vis were used to investigate the chemical constitution and phase transformation property of PNIPAm. The results show that it is successful to obtain PNIPAm. It has thermosensitivity. And its lower critical solution temperature is found to be 34°C. Therefore, a green preparation method for environment-responsive polymer is presented.

1235