• 대한화학회지
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• 제20권4호
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• pp.270-276
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• 1976

양이온 표면활성제인 Zephiramine의 존재하에서 여러가지 술포프탈레인 지시약의 흡수스펙트럼과 해리상수를 측정하여 수용액에서의 값과 비교했다. 염기성적색형은 흡수 극대가 6${\sim}$21 nm 장파장쪽으로 이동하며 흡수도는 약간 증가하는 반면, 황색형은 흡수극대가 오히려 4${\sim}$20 nm 단파장으로 이동하고 흡수도도 약간 감소했다. pKa값은 -1.38${\sim}$0.37정도 변화했다. 이와같은 정색반응을, 색소분자가 미셀 표면에 흡착됨으로서 더 안정한 공면구조를 형성하기 때문이라는 가정으로 설명했다.

• Bulletin of the Korean Chemical Society
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• 제16권2호
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• pp.135-138
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• 1995

A series of new polymers containing phenylenevinylene (PV) units were synthesized by Wittig polycondensation reaction and properties of the synthesized polymers were characterized by FT-IR and UV-visible spectroscopy, and their light-emitting properties were studied. All of the synthesized polymers were soluble in organic solvents and showed good film quality. The absorption maxima and band edges of the polymers were moved to shorter wavelength region by reducing the electron donating alkoxy groups incorporated in phenylenevinylene unit. The photo-induced emission spectra were obtained and all of the polymers revealed their emission in blue region. The observed emission maxima of the polymers were ranged from 480-495 nm.

• 대한화학회지
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• 제33권3호
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• pp.304-308
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• 1989

Methyl Thymol Blue(MTB) 발색시약을 사용하여 $Lu^{3+},\;Eu^{3+},\;Sm^{3+}$ 및 $Pr^{3+}$ 원소의 흡수분광광도법에 의한 정량법을 확립하였다. ligand와 금속의 몰비는 1:1이었으며 Hexamethylenetetramine 완충용액으로 pH 6.5로 만들었을 때 MTB의 최대흡수파장은 440 nm이며 희토류-MTB 착물의 최대흡수파장은 610 nm로 나타났고 용액의 흡광도는 발색 후 7시간 정도까지 일정한 흡광도를 나타내며 $0{\sim}110{\mu}g/50ml$의 범위에서 Beer의 법칙에 따른다. phosphate, EDTA, citrate같은 리간드이온들은 희토류 -MTB의 흡광도에 크게 영향을 주며 각각의 희토류 원소분석의 선택성은 없다. 메틸알코올, 에틸알코올 및 아세톤 용매에서도 희토류-MTB 용액의 흡광도는 변하지 않았다. 몰흡광계수는 $1.2{\sim}2.0{\times}10^4mol^{-1}{\cdot}l{\cdot}cm^{-1}$이다.

• Journal of Photoscience
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• 제11권2호
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• pp.83-87
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• 2004

A porphyrin compound containing a crown ether moiety (Por-Crown) and its zinc complex (ZnPor-Crown) have been prepared and the effect of the addition of alkali metal on their fluorescence has been investigated. As alkali metal cations were added, the absorption and fluorescence maxima did not change. However, the absorbance and intensity of fluorescence increased dramatically. Among the alkali metal cations tested, addition of K$^{+}$ and Cs$^{+}$ showed strongest enhancement of absorbance and fluorescence intensity of Por-Crown and ZnPor-Crown.own.

• 통합자연과학논문집
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• 제2권3호
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• pp.215-218
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• 2009

A silaspirotropylidene has been obtained from the reaction of the lithium salt of tetraphenylsilole dianion with 2 equiv of diphenylcyclopropene, followed by quenching with Me3SiCl. Silaspirotropylidene exhibits an unusual optical property its optical property was characterized by UV-vis and fluorescence spectroscopy. Absorption wavelength maxima of silaspirotropylidene was 420 nm. silaspirotropylidene displayed an emission band at 550 nm with excitation wavelength of 420 nm.

• Bulletin of the Korean Chemical Society
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• 제9권4호
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• pp.209-212
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• 1988

The hydrophobic interaction leading to the formation of ion-pair between $MB^+$ and $TPB^-$ was investigated spectroscopically by varying the medium with the addition of 1,A-dioxane or urea. Beyond 0.01 mole fraction of 1,A-dioxane in water or above 2.0M urea the ion-pair appeared to be completely dissociated into individual ions. The ion-pair was not observed in common organic solvents and the absorption maxima of $MB^+$ were correlated relatively well with the ${\pi}^{\ast}$-scale.

• 대한화학회지
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• 제34권6호
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• pp.616-621
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• 1990

UV-VIS 흡광광도법으로 Nd, Pr, Sm, Eu, Ho 및 Er을 정량할 때 스펙트럼 방해를 다원소 보정법으로 방법에 대하여 연구하였다. 개별희토류의 흡광도를 측정하고 또, Nd와 Pr의 혼합용액 및 Sm, Eu, Ho, Er의 혼합용액의 흡광도를 측정하여 몰흡광 계수를 구하고 이들로부터 상호 방해가 가장 적은 파장 즉, Nd(444.2nm), Pr(575.1nm), Sm(401.7nm), Eu(394.2nm), Ho(416.6nm), Er(379.7 nm)임을 알았다.

• Journal of Photoscience
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• 제9권2호
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• pp.347-349
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• 2002

Synthetic zinc chlorins possessing a hydrophylic polyoxyethylene chain at the 17 -position were prepared. An amphiphilic zinc chlorin possessing a single chIorin moiety showed absorption maxima at 675 nm in an aqueous medium, indicating that the zinc chIorin did not form large aggregates but a dimeric structure. In contrast, amphiphilic zinc chlorin dyads in which two zinc chlorin moieties were connected with a hydrophilic polyoxyethylene linkage showed red-shifted absorption band around 720-740 nm in an aqueous medium. The result indicated that the amphiphilic zinc chlorin dyad self-aggregated to form chlorosome-like oligomer.

• 대한화학회지
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• 제58권3호
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• pp.297-302
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• 2014

The synthetic route to coumarin systems is well established and one approach of particular interest leads to the intermediate 7-diethylamino-3-formylcoumarin. A combination of the N,N-diethylamino-coumarin donor with a wide range of acceptor groups of varying electron withdrawing strength should permit the synthesis of a series of extended coumarin dyes with absorption maxima range from 500 to 600 nm, or even beyond. In this communication, a novel efficient synthesis of indoles, benzothiazole and benzoxazole based on coumarin chromophores were achieved and the coloristic and fluorophoric properties of these chromophores were studied.

• 약학회지
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• 제28권5호
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• pp.275-282
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• 1984

The interaction between azo dyes and cationic surfactant was studied by absorption spectroscopy and fluorescent Rayleigh scattering. In order to presume the structure of formed micelle, methyl orange and ethyl orange as azo dyes and cetyltrimethylammonium bromide (CTAB) as cationic surfactant were used. Infomations about interaction parameter including absorption maxima, optimal conditions, and intensity of fluorescent Rayleigh scattering were obtained. When azo dyes and CTAB are formed 1 : 1 complex, it showed the strongest intensity of fluorescent Rayleigh scattering. On going from mixed micelle to homomicell, It suggests successively several intermediate steps of complex structure which can be distinguished clearly from one another.