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Langmuir - Blodgett 법을 위한 ( 3-Alkyl benzimidazolium ) - TCNQ ( 1 : 1 ) 착물의 분산용매 중에서의 안정성
손병청,황교현,정순욱 ( Byoung Chung Sohn,Kyo Hyun Hwang,Soon Wook Jeong ) 한국유화학회 1994 한국응용과학기술학회지 Vol.11 No.1
A Stability to the Spreading solvents, Which is acetonitrile, dichloromethane, benzene, chloroform and acetonitrile-benzene(1:1, v/v) of (3-Alkyl benzimidazolium)-TCNQ(1:1) Complex was investigated by UV-visible Spectrometer and was confirmed stabilized on acetornitrile, acetonitrilbenzene(1:1, v/v) for five hours. Using Ultra pure water as subphase for Langmuir-Blodgett(LB) Films, it was achived successibely to fabricate the Y-type LB films of (3-Alkyl benzimidazolium)-TCNQ(1:1) Complex. For the identification of deposition of (3-Alkyl benzimidazolium) TCNQ(1:1) Complex, UV visible spectra was recorded on HP 8452A spectrometer.
손병청,황교현,정순욱 ( Byoung Chung Sohn,Kyo Hyun Hwang,Soon Wook Jeong ) 한국유화학회 1994 한국응용과학기술학회지 Vol.11 No.1
In this research, (3-alkyl benzimidazalium)-TCNQ complexes were synthesized to obtain the necessary components for Langmuir-Blodgett Technique. (3-Alkyl benzimidazolium)-TCNQ complexes were prepared by the reaction of LiTCNQ with 3-alkyl benzimidazolium bromides and the products were confirmed by elemental analysis. FT-IR, UV-Visible spectroscopies FT-IR spectra of (3-alkyl benzimidazolium)-TCNQ(1 : 2) complexes were characterized by a broad band with a maximum at about 2900cm^-1 appears and were ascribed to electronic rather than vibrational absorption.
( N-docosyl pyridinium ) - TCNQ ( 1 : 1 ) 착체의 합성과 Langmuir - Blodgett 초박막 제작
손병청,정순욱 ( Byoung Chung Sohn,Soon Wook Jeong ) 한국유화학회 1989 한국응용과학기술학회지 Vol.6 No.2
(N-docosyl pyridinium)-TCNQ(1:1) complex was synthesized by reacting N-docosyl pyridinium bromide and LiTCNQ. This complex was investigated and confirmed by elemental analysis. U.V.I.R spectra. A stability to the dispersion solvent, which is acetonitrile, dichloromethane, benzene, chloroform and acetonitrile-benzene (1:1, V/V) of (N-docosyl pyridinium)-TCNQ(1:1) complex was investigated by U.V spectrophotometer and was confirmed stabilized on acetonitrile, benzene and acetonitrile-benzene(1:1`V/V) for 7 hours. Using ultra pure water as subphase for L-B film deposition, the Y-type L-B film of (N-docosyl pyridinium)-TCNQ(1:1) complex was farbricated. The electrical conductivities on a perpendicular direction of the L-B film were measured to be 5×10exp(-5)∼5×10exp(-14) S/cm according to the number of layer.
Chay Coupler 중간체의 합성과 발색현상에 관한 연구
김영찬,손병청 ( Yeoung Chan Kim,Byoung Chung Sohn ) 한국유화학회 1996 한국응용과학기술학회지 Vol.13 No.3
In this paper, intermediate cyan coupler was prepared by the reaction of 2-nitro-4, 6-dichloro-5-methylphenol with Pd(5wt%). The product was identified by using various analytical tools such as melting point, elemental analyzer, IR spectrophotometer and mass spectrometer. The reaction of intermediate cyan coupler with CD-3(color development agent) was shown cyan color.
김영찬,손병청 ( Yeoung Chan Kim,Byoung Chung Sohn ) 한국유화학회 1996 한국응용과학기술학회지 Vol.13 No.1
In this study, benzoxazolo carbocyanine dye was used as sensitizer for photographic emulsion, and the photographic characteristics were examined. The basic properties of sensitizer such as stability in various solvents were examined. The sensitizer was very stable in methanol, acetonitrile, acetone, demethylformamide, and chloroform solution. Absorption spectra of benzoxazolo carbocyanine dye 2.5×10^-6M and 5×10^-6M concentrations in 10% aqueous methanol solutions containing 10^-2M potassium chloride show the monomer-J-aggregation characteristics. Compared to the absorption peak of the monomer in pure methanol solution the red shifts of the monomer-J-aggregate peaks of benzoxazolo acrbocynaine dye of 2.5×10^-6M and 5×10^-6M concentrations in 10% aqueous methanol solutions containing 10^-2M potassium chloride are 34nm respectively, and the sensitizing peak of benzoxazolo carbocyanine dye in photographic emulsion has red shift of 34nm Therefore, if was concluded that benzoxazolo carbocyanine dye can be used as green sensitizing dye for the spectral sensitization of photographic emulsion.
전하이동착체의 합성과 Langmuir - Blodgett 막의 제조에 관한 연구
손미화,손병청 ( Mi Wha Sohn,Byoung Chung Sohn ) 한국유화학회 1995 한국응용과학기술학회지 Vol.12 No.2
Octadecyltrimethylammonium- TCNQ(1:1) complex was synthesized by the reaction of Li TCNQ with octadecyltrimethylammonium bromide and the reaction product was identified with FT-IR and UV/Vis spectroscopies. In order to prepare the LB films, π-A isotherm characteristics of octadecyltrimethylammonium-TCNQ(1:1) complex were investigated. The LB films of octadecyltrimethylammonium- TCNQ(1:1) complex were formed on various substrates and the formation of ultrathin films of octadecyltrimethylammonium- TCNQ(1:1) complex was confirmed by using FT-IR and UV-Vis spectroscopies.
디메틸프탈레이트와 에틸렌글리콜의 에스테르 교환반응에서 질산염 촉매의 영향
박근호,손병청 ( Keun Ho Park,Byoung Chung Sohn ) 한국유화학회 1993 한국응용과학기술학회지 Vol.10 No.1
Transesterification reaction between dimethyl phthalate and ethylene glycol was kinetically investigated in the presence of various metal nitrate catalysts at 170℃. The reaction rates measured by the amount of distilled methanol from the reaction vessel. The transesterification reaction was carried out under the first order conditions respect to the concentration of dimethyl phthalate and catalyst, respectively. The over-all order was 2nd. By Arrhenius plot, the activation energy was calculated as 17.4kcal/mole and 17.2kcal/mole on the transesterification reaction with zinc nitrate and leas nitrate, respectively. Apparent rate constant. k` was appeared linear about concentration of catalyst.
에탄올아민과 메틸메타크릴레이트의 에스테르 교환반응에 관한 연구
박근호,손병청,류철모 ( Keun Ho Park,Byoung Chung Sohn,Chul Mo Ryu ) 한국유화학회 1985 한국응용과학기술학회지 Vol.2 No.2
The transesterification reaction between ethanolamine and methyl-methacrylate was kinetically investigated in the presence of various metal acetate catalysts at 110℃. The transesterification was found to obey first-order kinetice with respect to the concentration of ethanolamine and methyl-methacrylate, respectively. By the arrhenius plot, the activation energy has been calculated as 11.9 Kcal with lead acetate catalyst, 14.7 Kcal without catalyst. The reactivities has highest value where the electronegativity and instability constant (Kij) values for the metal acetate catalysts are about 1.6.