Aminophosphine류가 배위된 전이금속(Pd, Ni) 착물의 촉매반응; I. 탄소-탄소 짝지움 반응

정맹준(Maeng-Joon Jung),이철재(Chul-Jae Lee),김동엽(Dong-Yeub Kim) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.1

Several transition metal complexes, [M(L)X₂](M=Pd(Ⅱ), Ni(Ⅱ); X=CI, Br) are prepared with aminophosphine ligands such as 1,2-bis{(diphenylphosphino)amino}ethane{Ph₂PNHCH₂CH₂NHPPh₂}(L₁), 1,2-bis{(diphenylphosphino)amino}propane{Ph₂PNHCH(CH₃)CH₂NHPPh₂}(L₂), trans-1,2-bis{(diphenylphosphino)amino}cyclohexane{Ph₂PNHC?H?NHPPh₂}(L₃) and 1,2-bis{(diphenylphosphino)amino}benzene{Ph₂PNHC?H₄NHPPh₂}(L₄). The properties of these complexes are characterized by optical spectroscopic methods including UV/vis spectroscopy, CD, IR, ¹H- and ?P-NMR together with conductometer and elemental analysis. All complexes are stable under atmospheric environment. Catalytic reactivity for C-C coupling between [M(L)X₂] and Grignard reagents(RMgX; R=phenyl, propyl, buthyl) by thermolysis were investigated utilizing GC/mass, ¹H- and ?C-NMR. When mol scale is 1:20 at [Pd(L)Cl₂] and Grignard reagents, the high catalytic activity for C-C coupling is apparent. The [M(L)X₂](X=Cl, Br) complexes which have strong bond at M-P exhibit high yields for C-C coupling reactions. When the central metal ion is Pd(Ⅱ), the high catalytic activity for C-C coupling is apparent. The complex coordinated with Br shows higher catalytic activity for C-C coupling reactions compared to Cl.

새로운 피혁폐수 처리제에 관한 연구; I. 새로운 유기 응결제의 개발

정맹준 ( Maeng-joon Jung ),이철재 ( Chul-jae Lee ),한성욱 ( Sung-wook Han ) 한국산업융합학회 2006 한국산업융합학회 논문집 Vol.9 No.4

As the interest in environmental pollution resulting from recent industrial development is converging, wastewater treatment problem of dying processing is one of important pending issue. Usually, flow mediation earth and settling pond etc. of processing plant to handle water or wastewater. Mediation is the wastewater that flowed past settling pond than material of heavy particles, water weight colloid particles that big solids are removed but are suspensibility material settlement exclusion impossible. So, we need flocculation and coagulation action to remove materials from this colloid state. For flocculation and coagulation action chemical agents to add back, addition of chemical agents forms floc of could settle size. That is, shorten the sedimentation time and quality of processing water because promoting sedimentation doing to do fines or suspended solids and colloid can materials large size and also, flocculation to annex efficiency of filtration augment. Therefore, I executed this research to prove that improving organic matter and chromaticity of treated water of processing epochally using organic coagulant informed positive ion co-polymerization superior in color wastewater through this research.

새로운 피혁폐수 처리제에 관한 연구

박정회(Jung-Hoi Park),이철재(Chul-Jae Lee),최현국(Hyun-Kuk Choi),정맹준(Maeng-Joon Jung) 한국산업융합학회 2008 한국산업융합학회 논문집 Vol.11 No.3

Usually, flow mediation earth and settling pond etc. of processing plant to handle water or wastewater. Mediation is the wastewater that flowed past settling pond than material of heavy particles, water weight colloid particles that big solids are removed but are suspensibility material settlement exclusion impossible. So, we need flocculation and coagulation action to remove materials from this colloid state. Flocculation and coagulation by addition of chemical agents forms floc settle size. That is, shorten the sedimentation time and quality of processing water because promoting sedimentation doing to do fines or suspended solids and colloid can materials large size and also, flocculation to annex efficiency of filtration augment. Therefore, I executed this research to prove that COD efficiency for wastewater by using inorganic coagulant.

자외선 공명 라만분광법을 이용한 Doxorubicin과 Adenine의 상호작용 연구

이철재,정맹준,Lee, Chul-Jae,Jung, Maeng-Joon 대한화학회 2008 대한화학회지 Vol.52 No.2

The interaction of the antitumour agent, doxorubicin, with adenine is investigated in an aqueous solution at a concentration of 10-3~10-4 with volume ratios of 1:2. A UV-resonance Raman spectroscopy and surface enhanced Raman spectroscopy are used to determine the binding sites of doxorubicin to adenine and the structural variations of doxorubicin-adenine complexes in an aqueous solution. We identified that the possibilities of doxorubicin interacted with the N7 positions of adenine.

Silver/PMMA 나노복합체의 합성과 특성에 관한 연구

남기영,이철재,정맹준,Nam, Ki-Young,Lee, Chul-Jae,Jung, Maeng-Joon 대한화학회 2008 대한화학회지 Vol.52 No.4

Silver Mirror Substrate를 이용한 Bromothymol Blue의 SERS 연구

이철재(Chul-Jae Lee),정맹준(Maeng-Joon Jung),김동엽(Dong-Yeub Kim) 한국산업융합학회 2012 한국산업융합학회 논문집 Vol.15 No.2

In this study, the experiments for surface enhancement of silver mirror substrate were done, where we checked the characteristics of silver mirror substrate made by Tollen"s method. The surface enhancement of Bromothymol blue was analyzed by three kind of silver mirror substrates. The assignments of the vibrational bands shown in SERS spectra are given based on both literature and the semi-empirical calculations at the PM3 methods. Finally, we deduced that the adsorption orientation of bromothymol blue was little tilted flat to the silver mirror surfaces by using of the surface selection rules.

멜라토닌의 특성에 대한 이론적 연구

김동엽(Dong-Yeub Kim),정맹준(Maeng-Joon Jung),이철재(Chul-Jae Lee) 한국산업융합학회 2012 한국산업융합학회 논문집 Vol.15 No.2

Melatonin has been studied as a potential treatment of cancer, immune disorders, cardiovascular diseases, depression, seasonal affective disorder (SAD), circadian rhythm sleep disorders, sexual dysfunction and some forms of insomnia. Prolonged release melatonin has shown good results in treating insomnia in older adults. It may ameliorate circadian misalignment and SAD. Basic research indicates that melatonin may play a significant role in modulating the effects of drugs of abuse such as cocaine. A 2004 review found that melatonin significantly increased total sleep time in people suffering from sleep restriction. Therefore, in this study, in order to explain characteristics of melatonin, total energy, net charge, vibrational mode of melatonin are calculated by PM3 methods of HyperCam 6.0.

Silver Mirror Substrate를 이용한 Eriochrome Black T의 SERS 연구

이철재(Chul-Jae Lee),정맹준(Maeng-Joon Jung),김동엽(Dong-Yeub Kim) 한국산업융합학회 2011 한국산업융합학회 논문집 Vol.14 No.1

In this study, the experiments for surface enhancement of silver mirror substrates were done, where we checked the characteristics of silver mirror substrate made by Tollen's method. The surface enhancement of Eriochrome Black T(EBT) was analyzed by silver mirror substrates. We observed the SERS spectra of EBT. The assignments of the vibrational bands shown in SERS spectra are given based on both literature and the semi-empirical calculations at the PM3 methods. Finally, we deduced that the adsorption orientation of EBT was little tilted perpendicular to the silver mirror surfaces by using of the surface selection rules.

Silver Surface를 이용한 Quinoline의 SERS 연구

이철재(Chul-Jae Lee),정맹준(Maeng-Joon Jung),김동엽(Dong-Yeub Kim) 한국산업융합학회 2011 한국산업융합학회 논문집 Vol.14 No.3

In this study, the experiments for surface enhancement of silver surfaces were done, where we checked the characteristics of silver surfaces made by Tollen’s method. The surface enhancement of Quinoline was analyzed by three kind of silver mirror substrates. The assignments of the vibrational bands shown in SERS spectra are given based on both literature and the semi-empirical calculations at the PM3 methods. Finally, we deduced that the adsorption orientation of quinoline was little tilted flat to the silver mirror surfaces by using of the surface selection rules.

피나스테라이드의 특성에 대한 이론적 연구

이철재(Chul-Jae Lee),정맹준(Maeng-Joon Jung),김동엽(Dong-Yeub Kim) 한국산업융합학회 2013 한국산업융합학회 논문집 Vol.16 No.3

Finasteride, (5α, 17β)-N-(1,1-dimethylethyl)-3-oxo-4-azaandrost-1-ene-17-carboxamide), is a 5a-reductase enzyme inhibitor. This enzyme converts testosterone to the more potent androgen, a-dihydrotestosterone. This molecules a logical medical treatment for benign prostatic hyperplasia (BPH), as it induced a reduction in serum dihydrotestosterone and prostatic specific antigen levels with a concomittant increase in blood testosterone concentration . Despite its widespread use, little has been published concerning its molecular properties. Therefore, in this study, in order to explain characteristics of finasteride, total energy, net charge, vibrational mode of melatonin are calculated by PM3 methods of HyperCam 8.0.