• Title/Summary/Keyword: charge transfer complex

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The Effect of Pressure and Temperature on the Benzene-Iodine Charge Transfer Complex in n-Hexane (벤젠과 요오드 사이의 전하이동착물에 대한 압력과 온도의 영향)

  • Oh Cheun Kwun;Jeong Rim Kim
    • Journal of the Korean Chemical Society
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    • v.27 no.2
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    • pp.102-110
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    • 1983
  • The effect of pressure and temperature on the stabilities of the benzene-iodine charge transfer complex have been investigated through ultraviolet spectrophotometric measurements in n-hexane. The stabilities of the complexes were measured at temperatures of 25, 40 and $60^{\circ}C$ up to 1600 bars. The equilibrium constant of the complex formation was increased with pressure and decreased with temperature raising. The absorption coefficient was increased with both pressure and temperature. Changes of volume, enthalpy, free energy and entropy for the formation of complexes were obtained from the equilibrium constants. The red-shift at a higher pressure, the blue-shift at a higher temperature and the relation between pressure and oscillator strength were discussed by means of thermodynamic functions.

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The Effect of Pressure and Temperature on the Xylene-Iodine Charge Transfer Complex in n-Hexane (크실렌과 요오드 사이의 전하이동 착물에 대한 압력과 온도의 영향)

  • Oh Cheun Kwon
    • Journal of the Korean Chemical Society
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    • v.22 no.4
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    • pp.245-253
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    • 1978
  • The effect of pressures and temperatures on the stabilities of the p-xylene-iodine charge transfer complex have been investigated through ultraviolet spectrophotometric measurements in n-hexane. The stabilities of complexes were measured at 25, 40 and $60^{\circ}C$ under 1∼1,600 bars. The equilibrium constant of the complex was increased with pressure and decreased with temperature raising. The absorption coefficient was increased with both pressure and temperature. Changes of volume, enthalpy, free energy and entropy for the formation of complexes were obtained from the equilibrium constants. The red-shift observed a higher pressure, the blue-shift at a higher temperature and the relation between pressure and oscillator strength were discussed by means of thermodynamic functions.

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Absorption Spectra of a Methylene blue-Tetraphenylborate Ion Pair (Methylene Blue-Tetraphenylborate 이온쌍의 흡수스펙트럼)

  • Hyung-Soo Song;Young Joon Park;Kang-Jin Kim
    • Journal of the Korean Chemical Society
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    • v.28 no.6
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    • pp.355-360
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    • 1984
  • A new absorption spectrum observed from dilute aqueous solutions of methylene blue$(MB^+)$ and tetraphenylborate(TPB$^-$) ions was investigated by spectrophotometry. The species responsible for the spectrum can be a charge-transfer complex formed between the two, univalent, and poorly hydrated ions in order to minimize the disturbance to the water structure. However, as the absorption band of MB$^+$ is split into two bands with exciton splitting of about 2,000 cm$^{-1}$, the formation of double ion-pair, (MB-TPB)$_2$ appears to be more favorable than the charge transfer complex.

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The Effect of Pressure and Temperature on the Durene-Iodine Charge Transfer Complex in n-Hexane (듀렌과 요오드 사이의 전하이동착물에 대한 압력과 온도의 영향)

  • Oh Cheun Kwun;Jeong Rim Kim
    • Journal of the Korean Chemical Society
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    • v.27 no.1
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    • pp.9-17
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    • 1983
  • The effect of pressures and temperatures on the stabilities of the durene-iodine charge transfer complex have been investigated through ultraviolet spectrophotometric measurements in n-hexane. The stabilities of complexes were measured at 25, 40 and $60^{\circ}C$ under $1{\sim}1600$ bars. The equilibrium constant of the complex was increased with pressure and decreased with temperature raising. The absorption coefficient was increased with both pressure and temperature. Changes of volume, enthalpy, free energy and entropy for the formation of complexes were obtained from the equilibrium constants. The red-shift observed at a higher pressure, the blue-shift at a higher temperature, and the relation between pressure and oscillator strength were discussed by means of thermodynamic functions.

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발효조중의 발효이동에 미치는 phenol 유도체 및 Catechol 유도체의 영향

  • 이경희;이근태
    • Proceedings of the Korean Society for Applied Microbiology Conference
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    • 1978.04a
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    • pp.98.2-98
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    • 1978
  • 호기성 발효에 있어서, 산소와 charge transfer complex를 형성할 수 있는 phenol 유도체인 guai-acol, vanillin, O-v-anillin 등과 catechol 유도체인 resorcine, adrenaline, dopamin 등이 산소와의 반응에 의하여 효과적인 산소공급 촉진제로서 이용될 수 있는가를 알아보기 위하여 합성배지중에서 나타내는 산소이동계수(KLQ)를 측정 비교하여 발효공학에의 응용가능성을 검토하였다.

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A Study on the Electrical characteristics of LiTCNQ (LiTCNQ 착체의 전기적 특성에 관한 연구)

  • Kim, Yong-Tae;Kang, Hun;Jeong, Soon-Wook;Sohn, Byoung-Chung;Kang, Dol-Yol
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1988.10a
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    • pp.18-20
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    • 1988
  • The electrical characteristics of LiTCNQ, the most important intermediate in a synthesis of an organic charge transfer complex, was measured. Activation energy of LiTCNQ was estimated from the conductivity variation on the temperature increase.

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Syntheses and Photofading of Intermolecular Charge-Transfer Complex Dyes of Phenothiazine and Quinonoid Compounds (Phenothiazine과 Quinone계 분자간 전하 이동형 색소의 합성 및 광 퇴색)

  • 김성훈;이순남;임용진
    • Textile Coloration and Finishing
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    • v.4 no.2
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    • pp.64-68
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    • 1992
  • The charge-transfer(CT) complexes derived from phenothiazine as donor and quinonoid compounds as accepters were evaluated as coloring matter. Light fastness of the intermolecular charge-transfer(CT) complex dyes as well as absorption wavelength is an important factor when the complexes are applied to coloring matters. The photofading mechanism of CT complex dyes of phenothiazine and accepters were examined. The addition of effective radical scavenger, antioxidant and photostabilizer gave a remarkable enhancement of the photostability of CT dyes.

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Synthesis and Electrochromism of Intermolecular Charge-Transfer Complex Dyes

  • 권태순;이배욱;윤지영;도명기
    • Bulletin of the Korean Chemical Society
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    • v.19 no.12
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    • pp.1337-1341
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    • 1998
  • The charge transfer (CT) complex dyes between electron donor phenothiazine and electron acceptors namely, 2, 3-dichloro-1,4-naphtoquinone and 2,3-dichloro-5-nitro-1,4-naphtoquinone, were formed in the dichloromethane solution and electrochromic properties were studied using Bu4NC1O4 as supporting electrolyte. A 1 : 1 correspondence between the donor and acceptor molecules in the CT complex was found.

Preparation of Enzyme Electrodes for Biofuel Cells Based on the Immobilization of Glucose Oxidase in Polyion Complex (폴리이온복합체를 이용하여 글루코스 산화효소를 고정화한 바이오전지용 효소전극 제조)

  • Nguyen, Linh Thi My;Li, Nan;Yoon, Hyon Hee
    • Applied Chemistry for Engineering
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    • v.24 no.1
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    • pp.99-103
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    • 2013
  • An emzymatic bioanode for a glucose/oxygen biofuel cell was prepared by the sequential coating of carbon nanotube (CNT), charge transfer complex (CTC) based on tetracyanoquinodimethane (TCNQ) and tetrathiafulvalene (TTF), glucose oxidase (GOx), and polyion complex (mixture of poly-L-lysine hydrobromide and poly (sodium 4-styrenesulfonate)) on a glassy carbon electrode. A biocathode was also prepared by the sequential coating of CNT, bilirubin oxidase (BOD), 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), and polyion complex. The effect of CNT and CTC on the electrochemical performance was investigated. The biofuel cell exhibited a promising performance with maximum power densities of 3.6, 10.1, and $46.5{\mu}W/cm^2$ at 5, 20, and 200 mM of glucose concentration, respectively. The result indicates that the biofuel cell architecture prepared in this study can be used in the development of biofuel cells and biosensors.