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      • Chalcone 유도체를 도입한 폴리이미드 배향막에서의 광배향 특성

        申東明,鄭敬勳 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

        The conventional rubbing technique can't satisfy recent demands for alignment quality. Therefore the photoalignment with UV light have been investigated. Polyimide (PI) film was used as an alignment layer, The PI film (4wt%) was spin coated 3) and cured. The thickness of the coated PI film was about 50 nm. By Williamson synthesis 4), the coated PI film was modified with the chalcone derivatives, The LPUV light was irradiated on the PI film. A cell was fabricated by injecting LC (BL001) into a pair of substrate. The LPUV light irradiation caused dimerization between the chalcones or isomerization in the chalcone derivatives. The long alkyl-chains were aligned homeotropically to the PI film. Thereby the alignment direction of LC-molecules was homcotropic to the PI film.

      • 4-(4-Nitro phenylazo)-1-naphthol의 광화학

        申東明 弘益大學校 科學技術硏究所 1992 科學技術硏究論文集 Vol.2 No.-

        The acid and base properties of organic dyes are of current interest. The 4-(4-nitrophenylazo)-1-naphthol(NPNOH) was purified, and characterized spectroscopically. The azo-compound has electron donor and acceptor, which generate large solvatochromic behavior. The electronic transition energies of the acid(-OH) and base(-O-) forms were 458nm(76.4 kcal/mol) and 634nm(55.2 kcal/mol). The pKa value calculated was 15.5 which was fairly large for most organic dyes. The distribution of the dye in micellar solutions(SDS, CTAB, ...) will be discussed. The head-group charge in surfactant molecules are important for the electronic transition energy and orientation of the dye molecules in micellar solutions. The electronic transition energies will be compared with those of Oalkylated NPNOH, (NPNOR).

      • KCI등재

        지구자에 對한 文獻考察 및 最近 硏究 動向

        신동훈,조명래 대한본초학회 2002 大韓本草學會誌 Vol.17 No.1

        Objectives : So many kinds of disease are increasing tendency due to excessive alcohol ingestion, I reported some clues that the studies of origin, another name, property, related channels, effect, indication, contraindication for clinical use through oral administration and development of herb medicine acupuncture of Zhi Ju Zi, expecting the usage of relieving alcoholism that is like Pueraria root, Pueraria flower. Methods : 1. I investigated the 12 books of herbal medicine that Zhi Ju Zi was written in order of times. 2. I was looking for origin, another name, property, related channels, effect, indication, contraindication of Zhi Ju Zi which mentioned above 12 books of herbal medicine Conclusions : I reached conclusions as follows investigating of 12 herbal medicine books that origin, another name, property, related channels, effect, indication, contraindication of Zhi Ju Zi was written. 1. Zhi Ju Zi is fruit or seed attached peducle of pulpy substance of Hovenia dulcis THUNB. 2. Another names are Mi Qu Lu, Mu Mi, Mu Tang, Ji Ju Zi, Ji Zhao Zi. 3. Properties are sweet, even non-toxic and related to the channels of the heart, the spleen, the small intestine. 4. Pathogenic wind on head, lower abdomen rigidity, febrile disease, thirst, hiccup, vomiting, difficulty in urination, alcohol intoxication, fruit vegetable intoxication, paralysis, muscle numbness and unconsciousness are treated by the effect of relieving restlessness and thirst, clearing away upper heat, induce urination and defecation, relieving nausea, relieving roundworms intoxication 5. The person who has spleen-stomach biological energy deficiency with cold type is contraindicated, and over usage get roundworms.

      • 폐분체 도료의 재활용 방안에 관한 연구

        신동철,김영훈,이순기,김경원,신선명,강헌찬 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1

        With the progress of industry, the much more demand of paint around us grows rapidly. However, the whole quantity of raw materials used to make powder coatings is presently imported to fill the domestic needs. Moreover, it is well known that the waste powder coatings from the domestic industries are mostly incinerated. The method of destructing the waste powder coatings by fire causes VOC to be generated, and this results in some serious environmental problems such as air pollution and so on. Therefore, the effective and proper measure must be devised to reuse the waste powder coatings for the purpose of eliminating waste of resources and avoiding the outflow of foreign currency. This study aims to make the plan to recycle the waste powder coatings, and its conclusion is drawn as follows: First, it can be seen that the waste powder coatings with a weak electrostatic power restore gradually to the original state of electrostatic power through the process of fusion and retreatment. Second, it can be estimated that those coatings, with the use of the cyclon, can be removed by dividing a powder of particles less than 10㎛. Third, it can be ascertained that the possibility of reusing the waste powder coatings is proved when it is divided into particles by cyclon and a revolving screen after the process of fusion, rolling, crushing and pulverization.

      • N-Docosylquinolinium-TCNQ LB막의 광학적 특성

        신동명 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.4 No.-

        Langmuir-Blodgett (LB) technique is one of the most possible candidate for the development of the devices using ultrathin organic film. For the electrical application of the organic films, one of the important factor is enhancing the electrical conductivity. During the past decade many papers have been published in the field of high electrical conducting LB films. Recently, Andre Barraud et al. have shown that the use of molecular association involving TCNQ-Iodine charge transfer(CT) systems can give rise to a considerable increase in the electrical conductivity. The present paper is devoted to the physical and electrical characteristics of N-docosylquinolium-TCNQ films compared with the films doped with 12. Iodine affects the degree of charge transfer and the conductivity of the films. The UV-visible absorption spectra of the film doped with 12 shows that the peak of 13-which had electronic transition at 300∼350nm and (TCNQ-)2 dimer absorption disappered. The in-plane electrical conductivity of the films doped with 12 were 1.4X10-6S/cm. which is three orders of magnitude higher conductivity than undoped LB films. But this enhanced conductivity was relatively low in compared with the value which previously reported from A. Barraud et al.. the film structural difference between Y and Z-type may cause the conductivity. Another possible reasons of the structural difference was the overlapping TCNQ anion radical in LB films.

      • 전자 주계와 전자 받게를 가진 분자의 쌍극자 모멘트 계산

        申東明,林成澤 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

        Computational calculations of molecular structure, molecular energy, dipole moment, solvation energy, conformation and molecular dynamics are of current interest. In this study, we calculate dipole moment of donor-acceptor aromatic molecules which exhibit dipole moments in a range of 7-10 debye. Since the dipolar aromatic molecules are important for the fabrication of nonlinear optic devices, characterization and estimation of dipole moment are prerequisite. The software used for the calculation of dipole moment was Hyper Chem. Seven different methods were tried to estimate the dipole moment. CNDO, INDO, MINDO/3, MNDO, AM1, PM3, and ZINDO/1. For small and rigid molecules, the calculated dipole moments are in a small range. ZINDO/1 give better fitting for the molecules containing sulfur atom.

      • 유기전기발광소자 제작을 위한 고효율 적색 유기 발광체 개발 및 공정 확립을 위한 연구

        申東明 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

        In this study, we synthesized a red-light emitting material, which is based on malononitrile moiety, and applied it as a red light emitter in OLED. The OLEDs structure can be described as indium tin oxide(ITO)/hole transporting layer/emitting layer/electron transporting layer/LiF/Al. The hole transporting layer was composed of N,N-diphenyl-N,N-di(3-methylphenyl)-1,1-biphenyl-4,4-diamine(TPD). The electron transporting layer consists of tris(8-hydroxyquinolinato) aluminum(Alg3). A1g3 exhibits high performance as an electron transport material and an emitting material. Emitting layer was composed of 2,6-dimethyl-4H-pyran-4-ylidene)malononitrile(d-DCM). The UV/visible absorption spectra and photoluminrscent(PL) spectra of the d-DCM showed luminescence maximum at 484nm and maximum at 611nm. Red color emission peak was confirmed at 650nm. One of the weak points to these systems is the difficulty to fabricate dye-doped monomeric organic layer. To realize the organic multi-color electroluminescence display with fine pixels, it is required to fabricate the light-emitting layer with single molecule in OLEDs. In this system, the characteristics of current density-applied voltage were typical one of that of diodes.

      • 4-Hydroxy-4'-Nitrostylbene의 Solvatochromic Effects

        신동명 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.5 No.-

        Solvato chromic effects and hydrogen bonding interaction of HN and ?? were investigated. UV-visible absorption spectra and fluorescence spectra of HN were obtained in organic solvents with various polarity. The electronic transition energies of HN and ?? were plotted agained empirical solvent polarity parameters. Taft ??, Reichard's ?????, Dong and Winniko's Py, and Kodower Z. Correlation with Taft ??parameter were reasonablly good, and much better correlation was observed when it was plotted against with energy calculated from ??????????????????????????. ????? and Z were not suitable to correlate the solvation properties of HN. Py showed reasonable correlation with electronic transition energy of HN. ?? showed little fluorescence and the absorption energy were shifted to red.

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