수용액에서 색소-계면활성제 계의 회합 생성에 관한 연구

최호섭,김흥두,Choi, Ho Soeb,Kim, Heung-Tu 대한화학회 1995 대한화학회지 Vol.39 No.3

낮은 농도에서 유기색소와 계면활성제 계의 흡수거동을 계산하기 위해 간단한 모델을 사용해보았다. 실험에서 얻어진 값에 3개의 파라미터가 포함되어 있는 결과식을 적용함으로써 이온쌍형성$(K_O)$, 회합체에 계면활성제 분자첨가의 경우$(K_S)$, 그리고 색소회합반응$(K_D)$에 대한 평형상수들을 계산하였으며 이값들을 이용하여 자유에너지를 계산하였다. $K_O$와 K_S$의 값들은 소수성에 원인이 있는 정전기적 상호작용에서 기대했던 것들보다 컸었고, $K_D$값들은 정전기적 반발력의 차폐효과로 간주할 수 있는 순수한 수용액에서의 알려진 회합값보다 약 10~20배 정도 높았다. At low concentration a simplified model of organic dye-surfactant system has been used to evaluate. By applying the resultant three parameter equation to the experimental data, values for the equilibrium constants for the ion-pair formation $(K_O)$, surfactant molecule addition to aggregates $(K_S)$ and dye aggregation reactions $(K_D)$ could be calculated and changes of free energy have obtained from its values. $K_O$ and K_S$ values were larger than those expected electrostatic interaction indicatihng a hydrophobic contribution and the $K_D$ values were about 10~20 times higher than those found for association in pure aqueous solutions which can be ascribed to the screening effect of the electrostatic repulsion.

Dihexadecyl Phosphate Vesicle에서 양이온 색소분자의 회합

최호섭,김흥두,Choi, Ho Soeb,Kim, Heung Tu 대한화학회 1998 대한화학회지 Vol.42 No.6

총설 : 계면활성제 수용액에서 미셀형성의 열역학적 고찰

유수창(Soo Chang Yu),최호섭(Ho Soeb Choi),(Gohsuke Sugihara) 한국공업화학회 2001 공업화학전망 Vol.4 No.4

수용액에서 유기 색소와 Sodium Dodecyl Sulfate와의 흡수 및 형광분광학적 연구

崔虎燮,金興斗 群山大學校基礎科學硏究所 1995 基礎科學硏究 Vol.10 No.-

The interactions of the organic dye stuffs, thionine(TH), methylene blue(MB) and toluidine blue (TB) to anionic surfactant, sodium dodecyl sulfate(SDS) are studied using absorbance and fluorescence spectroscopies. We have been investigated the absorbance variation and the relations between the concentration of SDS dependence on temperature the fluorescence intensity as the concentration of the anionic surfactant is increased. We could be calculated the equilibrium constants(Kd,Ks) by applying the model, and we have seen that they were about 10∼30 times higher than those found for association in pure aqueous organic dye stuffs. By using the equilibrium constants the changes of free energy(­ΔG) can also obtained.

Acridine Orange 水溶液의 會合에 관한 吸收分光學的硏究

崔虎燮,金興斗 群山大學校基礎科學硏究所 1993 基礎科學硏究 Vol.8 No.-

The spectral of change Acridine Orange(A. O) in aqueous solution with concentration changes are attributed to the formation of associations and explained in terms of the molecular excision theory. We also calculated the value of equilibrium association constant (Kd) using these optical properties (absorption and emission bands). On the basis of Kd we have drawn a Monomer-Dimer absorption spectra of A. O. The characteristic changes of the spectra of A. O. have been observed in the presence of KCl and PLGA. the formation of these aggregates depends on concentration of KCl and that of PLGA. the admixing of KCl and PLGA to A. O. has been found to cause the association of A. O. molecule in aqueous solution. We have been explained these facts by the stacking theory.

수용액에서 AO-SDS계의 회합 생성에 관한 연구

崔虎燮,金興斗 群山大學校基礎科學硏究所 1994 基礎科學硏究 Vol.9 No.-

낮은 온도에서 유기색소와 계면활성제 계의 흡수거동을 계산하기 위해 간단한 모델을 사용해 보았다. 실험에서 얻어진 값에 3개의 파라미터가 포함되어 있는 결과식을 적용함으로써 이온쌍형성 (Ko), 화합체에 계면활성제 분자 첨가의 경우(Ks), 그리고 색소화합반응 Kd에 대한 평형상수들을 계산하였으며 이 값들을 이용하여 자유에너지를 계산하였다. Ko와 Ks의 값들은 소수성에 원인이 있는 정전기적 상호작용에서 기대했던 것들보다 컸었고, kd값들은 정전기적 반발력의 차폐효과로 간주할 수 있는 순수한 수용액에서의 알려진 회합값보다 약 10∼20배 정도 높았다. At low concentration a simplified model of organic dye-surfactant system has been used to evaluate. By applying the resultant three parameter equation to the experimental data, values for the equilibrium constants for the ion-pair formation (Ko) surfactant molecule addition to aggregates(Ks), and dye aggregation reactions?? could be calculated and changes of free energy have obtained from its values. Ko and Ks values were larger than those expected electrostatic interaction indicating a hydrophobic contribution and the ?? values were about 10∼20 times higher than those found for association in pure aqueous solutions which can be ascribed to the screening effect of the electrostatic repulsion.

Methoene blue 溶液의 會合에 관한 熱力學的 硏究

崔虎燮 群山大學校基礎科學硏究所 1992 基礎科學硏究 Vol.7 No.-

The study of optical properties(absorption and emission) of methylene-blue(MB) is an important research because these substances are often used an active or dye lasers.?? The behavior of methylene blue in aqueous solution has been investigated by means of absorption spectroscopy. When two or more methylene blue molecules in solution are separated intermolecular distance, their xanthene rings can interact electrostatically to form aggregates such as dimers, trimers, etc. The formation of these aggregates depends on many factors such as the molecular structure of the dye, concentration, PH of medium, solvent nature and temperature. Since the monomer and the dimmer form of methylene blue present different absorption properties, the visible absorption, the visible absorption technique is the standard one to follow the methylene blue dimerization process. These experimental procedure also provides us with a good way to research the thermodynamic parameters of the aggregation, permitting the discussion of the association forces.

유기색소 분자와 음이온 계면활성제 및 고분자 전해질 사이의 효과에 관한 흡수 분광학적 연구

崔虎燮 群山大學校自然科學硏究所 1990 自然科學硏究 Vol.5 No.-

The metachromatic behavior of methylene blue(MB) and rhodamine-6G(Rh-6G) in aqueous solution and in the presence of sodium dodecyl sulfate(SDS) and bis(2-ethyl-hexyl) sodium sulfosuccinate; Aerosol OT(AOT) has been investigated by means of absorption spectroscopy. In the presence anionic surfactants, the characteristic change of the spectra of both MB and Rh-6G with the change of S/D (〔surfactant〕/〔Dye〕) value have been observed. The new bands appeared at shorter wavelength region than that of the β-band of the both dyes at S/D range of 300∼400 are assigned to be behavior is quite similar to that of the well known meta-band of dye-polymer system. The critical micelle concentrations(cmc) of both aqueous solution of surfactants alone and those of dye-surfactant systems are measured by the use of electrical conductivity method. The cmc values are found 3.9mM, and 2.8mM for MB-SDS, MB-AOT and Rh-6G systems, respectively. These Values are found to be lower than those of the aqueous solution of SDS and AOT alone, i. e, 8.2mM and 4.5mM, respectively. These facts are ascribed to the formation of dye-rich induced micelles(drim). The raction schemes of five steps are proposed for the porcess of the process of the dye-surfactant interaction throughout the range of surfactant concentraction. These schematic are found to be reasonable in the explanation of the spectral behavior of the dye-surfactant system.

有機色素分子와 水容性 高分子 物質에 鹽 및 界面活性劑 添加效果에 관한 吸收分光 光學的 硏究

崔虎燮 群山大學校自然科學硏究所 1986 自然科學硏究 Vol.1 No.-

The structural effect of polyanions and anionic surfactant (AOT) on the binding type of Methylene Blue (MB) was investigated spectrophotometrically. MB was bound to poly (potassium strenesulfonate) (PSS) and poly (Sodium 4-vinyl phenylsulfate) (SVS) in the dimeric or slightly aggregated form and to poly (sodium vinylsulfonate) (SVF) and poly (potassium vinylsulfate) (PVS) in the highly aggregated polymeric form. The aggregation of MB-reversed micelles system is also similiar to the case of MB-poly-anion. In the case of reversed micelles the amount of water destroys MB aggregation.