Synthesis and Thermal-Optic Properties of Azo Polyurethane Containing Chiral Unit

2013 ◽  
Vol 538 ◽  
pp. 73-76
Author(s):  
Feng Xian Qiu ◽  
Qing Wang ◽  
Cai Hong Chen ◽  
Hao Zhao ◽  
Jin Hua Liu ◽  
...  
Keyword(s):  
Optical Switch ◽  
Coupling Reaction ◽  
Chiral Reagent ◽  
Chemical Structures ◽  
Vis Spectroscopy ◽  
Diazo Coupling ◽  
Ft Ir ◽  
Diazo Coupling Reaction ◽  
Thermal Optic ◽  
Azo Polyurethane

A new chromophore containing azo group, 3,3'-dichloro-4,4'–di-(4-amino-azo-phenyl) -diphenylmethane (CAAPM), was synthesized based on 3,3'-dichloro-4,4'-diamino– diphenylmethane, sodium nitrite and benzenamine via diazo-coupling reaction. Azobenzene polyurethane (PU) containing chiral unit was obtained from CAAPM, chiral reagent L(-)-tartaric acid and isophorone diisocyanate (IPDI). The chemical structures of CAAPM and PU were characterized by FT-IR and UV-Vis spectroscopy. The measurements of refractive index (n) and thermo-optic coefficient (dn/dT) of polyurethane were demonstrated at complex light. The values of n and dn/dT were used to calculate the dielectric constant (ε) and its variation with temperature (dε/dT). The dn/dT is 4.2000～-3.7000×10-4°C-1. The conclusion has a little significance to develop new the digital optical switch (DOS).

Preparation of New Azo Benzene Polyurethane and its Thermo-Optical Properties

2014 ◽  
Vol 905 ◽  
pp. 181-184
Author(s):  
Peng Wang ◽  
Fei Yan Ye ◽  
Guo Rong Cao ◽  
Zheng Ling Wang ◽  
Feng Xian Qiu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Switch ◽  
Coupling Reaction ◽  
Attenuated Total Reflection ◽  
Good Thermal Stability ◽  
Vis Spectroscopy ◽  
Diazo Coupling ◽  
All Optical ◽  
Diazo Coupling Reaction ◽  
All Optical Switch

The new azo benzene polyurethane (CAPU) was synthesized by diazo coupling reaction with 1,4-Diaminobenzene, sodium nitrite, and R(-)-3-chloro-1,2-propanediol. The solubility was measured with several organic solvents. Some mechanical properties of CAPU, such as tensile strength and ratio of elongation at break, were investigated. The good thermal stability of the CAPU was shown by its absorption spectrum characterized by UV-Vis spectroscopy and its melting point of 113.5°C. Moreover, the refractive index of CAPU was obtained by the attenuated total reflection (ATR) method at different temperature and wavelength, by which the materials thermo-optic coefficient was calculated. It is shown that the material has a large thermo-optic coefficient and an obvious birefringence phenomena. And the dispersion coefficient was also calculated by the Sellmeyer equation. Because of thermo-optical properties mentioned above, the CAPU could be used to design and generate the thermo-optic switch and even all-optical switch.

Synthesis of Azo Polyurethane-Urea and Investigation of its Thermo-Optic Properties

2016 ◽  
Vol 230 (2) ◽  
Author(s):  
Caihong Chen ◽  
Zhening Yang ◽  
Fengxian Qiu ◽  
Tianlin Cao ◽  
Guorong Cao ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Physical And Mechanical Properties ◽  
Isophorone Diisocyanate ◽  
Visible Spectroscopy ◽  
Diazo Coupling ◽  
Uv Visible ◽  
Diazo Coupling Reaction ◽  
The Fourier Transform ◽  
Azo Chromophore ◽  
Azo Polyurethane

AbstractAn azo chromophore molecular S(-)-1,2-bis(4-azophenyl-4-nitro)-ethylenediamine (OABANEDA) was synthesized with 4-nitroaniline and S(-)-1,2-diphenyl ethylenediamine by diazo-coupling reaction. The azo polyurethane-urea (OAAPUU) was obtained from OABANEDA, polyether diol (NJ-210) and isophorone diisocyanate (IPDI). The structure of OAAPUU was characterized by the Fourier transform infrared and UV-visible spectroscopy. The physical and mechanical properties of OAAPUU were investigated. The refractive index (

scholarly journals The Spectroscopic and theoretical investigations of complex formation of (3E,3'E)-7,7'-(carbonylbis(azanediyl))bis(3-(2-(2-hydroxyphenyl)hydrazono)-4-oxo-3,4-dihydronaphthalene-2-sulfonic acid) with metal cations

2018 ◽  
Vol 15 (2) ◽  
pp. 6207-6217
Author(s):  
Olga Kovalchukova ◽  
Mikhael Ryabov ◽  
Alexandra Obmenennaya ◽  
Nikolai Popandopulo
Keyword(s):  
Complex Formation ◽  
Mass Spectra ◽  
Coupling Reaction ◽  
Metal Cations ◽  
Spectrophotometric Titration ◽  
Vis Spectroscopy ◽  
Diazo Coupling ◽  
Theoretical Investigations ◽  
Diazo Coupling Reaction ◽  
Charge Calculations

A novel azo-dye  was isolated by a diazo-coupling reaction and characterized by the elemental analysis, mass spectra, IR and UV-VIS spectroscopy. The processes of complex formation of H4L with some mono-, bis-, and trivalent metal cations were studied by spectrophotometric titration and theoretical modeling. The NBO effective charge calculations indicate a strong covalent character of the coordination bonds at complexation.

SYNTHESIS, PHYSICAL PROPERTIES AND POLYMERIC DIGITAL OPTICAL SWITCH OF AZO BENZOTHIAZOLE POLYURETHANE-UREA

2012 ◽  
Vol 21 (04) ◽  
pp. 1250044 ◽  
Author(s):  
ZHIJUAN CAO ◽  
FENGXIAN QIU ◽  
QING WANG ◽  
GUORONG CAO ◽  
YIJUN GUAN ◽  
...  
Keyword(s):  
Physical Properties ◽  
Digital Imaging ◽  
Transmission Loss ◽  
Optical Switch ◽  
Coupling Reaction ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Diazo Coupling ◽  
Diazo Coupling Reaction ◽  
Azo Chromophore

An azo chromophore 4-[(6-nitrobenzothiazole-2-yl)diazenyl]phenyl-1,3-diamine NBDPD was synthesized with 2-amino-6-nitrobenzothiazole and m-phenylenediamine by diazo-coupling reaction. Then, NBDPD was polymerized with NJ-220 and IPDI to obtain novel azo benzothiazole polyurethane-urea (BPUU). The structure and physical properties were characterized and investigated. The refractive index and transmission loss of BPUU film were measured by attenuated total reflection technique and the CCD digital imaging devices. The polymeric digital optical switch (DOS) based on the thermo-optic effect of the BPUU was designed and simulated. The results showed that the power consumption and response time of the DOS could be only 2.3 mW and 5.0 ms, respectively.

scholarly journals A multicommuted flow analysis method for the photometric determination of amoxicillin in pharmaceutical formulations using a diazo coupling reaction

2011 ◽  
Vol 22 (2) ◽  
pp. 279-285 ◽  
Author(s):  
Sueny K. B Freitas ◽  
Valdinete Lins da Silva ◽  
Alberto N Araújo ◽  
Maria Conceição B. S. M Montenegro ◽  
Boaventura F Reis ◽  
...  
Keyword(s):  
Flow Analysis ◽  
Coupling Reaction ◽  
Pharmaceutical Formulations ◽  
Photometric Determination ◽  
Analysis Method ◽  
Diazo Coupling ◽  
Diazo Coupling Reaction

scholarly journals Synthesis and Control of the Shell Thickness of Polyaniline and Polypyrrole Half Hollow Spheres Using the Polystyrene Cores

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Su-Ryeon Yun ◽  
Gyeong-Ok Kim ◽  
Chan Woo Lee ◽  
Nam-Ju Jo ◽  
Yongku Kang ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Hollow Spheres ◽  
Core Shell ◽  
Chemical Structures ◽  
The Core ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Core Shell Structure ◽  
And Control ◽  
Ft Ir Spectroscopy

Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The shells of Pani and Ppy were fabricated by adding different amounts of aniline and pyrrole monomers. PS cores were dissolved and removed from the core shell structure by solvent extraction. The thicknesses of the Pani and Ppy half hollow spheres were observed by FE-SEM and FE-TEM. The chemical structures of the Pani and Ppy half hollow spheres were characterized by FT-IR spectroscopy and UV-Vis spectroscopy. The shell thicknesses of the Pani half hollow spheres were 30.2, 38.0, 42.2, 48.2, and 52.4 nm, while the shell thicknesses of the Ppy half hollow spheres were 16.0, 22.0, 27.0, and 34.0 nm. The shell thicknesses of Pani and Ppy half hollow spheres linearly increased as the amount of the monomer increased. Therefore, the shell thickness of the Pani and Ppy half hollow spheres can be controlled in these ranges.

Synthesis, Photoisomerization and Thermo-Optic Property of Azo Optically Active Polymer

2010 ◽  
Vol 663-665 ◽  
pp. 41-44
Author(s):  
Chang Hong Ge ◽  
Feng Xian Qiu ◽  
Xiao Xian Gu ◽  
Dong Ya Yang
Keyword(s):  
Uv Light ◽  
Inorganic Materials ◽  
Optical Parameters ◽  
Chiral Reagent ◽  
Vis Spectroscopy ◽  
Optic Property ◽  
Order Of Magnitude ◽  
Ft Ir ◽  
Azo Chromophore ◽  
Thermal Volume Expansion

A novel azobenzene optically polymer (P-DA) was synthesized based on the azo chromophore molecule, chiral reagent L(-)-tartaric acid, acryloyl chloride and methacrylate. The P-DA was characterized by FT-IR, UV-Vis spectroscopy, 1H NMR, DSC and TGA. The P-DA had high thermal stability up to its glass-transition temperature (Tg) of 110 oC and 5 % heat weight loss temperature of 199 oC. The UV-induced trans/cis photoisomerization and reflex-isomerization behaviors were investigated. The results indicated that the P-DA solution could undergo photochromism after irradiated by 365 nm UV light. The optical parameters: refractive index (n), the dielectric constant (ε) and thermal volume expansion coefficient (β) of P-DA were obtained. The thermo-optic coefficients are one order of magnitude larger than those of the inorganic materials, such as SiO2 (1.1×10−5 oC -1 and LiNbO3 (4×10−5 oC -1) and was larger than the organic material such as polystyrene (-1.23×10-4 oC -1) and PMMA (-1.20×10-4 oC -1). The conclusion had a little significance to develop optical communication.

scholarly journals Diazo coupling reaction for the determination of biliverdin.

1991 ◽  
Vol 40 (8) ◽  
pp. 377-381
Author(s):  
Yuji SUZUKI ◽  
Yoshikatsu SAKAGISHI
Keyword(s):  
Coupling Reaction ◽  
Diazo Coupling ◽  
Diazo Coupling Reaction
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