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정맹준,박상규,정민호,김봉곤,도명기,Jeong, Maeng Jun,Park, Sang Gyu,Jeong, Min Ho,Kim, Bong Gon,Do, Myeong Gi 대한화학회 1994 대한화학회지 Vol.38 No.4
Several new nickel(II) complexes, [Ni(L)X$_2$ and [Ni(L)$_2$]Cl$_2$ (L = L$_1$, L$_2$ ; X = Cl$^-$, Br$^-$, I$^-$) have been synthesized by reacting NiX$_2$ or NiX$_2$, 6H$_2$O with aminophosphines(L) wherein L is 1,2-bis{(diphenylphosphino)amino}propane(L$_1$) or 1,2-bis{(diphenylphosphino)amino}ethane(L$_2$). These complexes are characterized by the optical spectroscopic methods (UV/Vis, CD, IR, $^1$H-NMR, and $^{31}$P-NMR) together with conductometer and elemental analysis. The complex with I$^-$ is tetrahedral, where the complexes with Cl$^-$ or Br$^-$ are square planar. The complexes, [Ni(L)X$_2$](X = Cl$^-$, Br$^-$) become tetrahedral, as they react with methyl iodide. The Ni(L)X$_2$ complexes underwent solvolysis with a various organic solvents such is EtOH, DMSO, THF and DMF.
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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.
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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.
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Pd(X)(COPh)(PPh₂)₃(X=Cl,Br,NCS,CN)와 Pd(CN)(COPh)(N-N)(N-N=en,R-pn)의 합성과 성질
정맹준,도명기 嶺南大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.16 No.-
Oxidative addition products, trans-Pd(X)(COPh)(PPh₃)₂(1) is obtained from the reaction of tetrakistriphenylphosphinoPalladium(0) complex and benzoylhalides, XCOPh(X=Cl,Br,NCS,CN), and the structure of these complexes were identified from the UV, IR and ?? spectral data. We found that the stretching vibration energy of the carbonyl group is CN < MCS < Cl < Br and it was depending on the type of X which is in trans position to the carbonyl in the complex 1. We also investigated the formation of the chelate complexes relate to trans influence of carbonyl group in the starting complex 1. It was found that chelate complexes, Pd(X)(COPh)(N-N)(N-N=en, R-pn)(2) were formed, when X is CN, by the reaction of bidentate ligands such as ethylenediamine(en), or R-propylenedamine(R-pn) with complex 1.
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유기리간드를 포함하는 팔라듐(Ⅱ), 니켈(Ⅱ), 착물의 trans-영향 및 안정성
한성욱,정맹준 경운대학교 산업기술연구소 1998 産業技術硏究論文誌 Vol.1 No.1(A)
The trans-influence and stability of the Pb(L)Cl₂ and Ni(L)X₂(X=Cl, Br, I) wherein L is 1,2-bis{(diphenylphosphino)amino}ethane were studied by spectroscopic methods. The complexes were prepared and characterized by elemental analysis, IR, UV, ¹H, and ^31P NMR spectroscopy. The [Ni(L)I₂] is tetrahedral, where [Pb(L)Cl₂] and [Ni(L)X₂](X=Cl, Br) are square planar. From the IR and δ^31P(ppm) data, it is appeared that the M-Cl bond strength were different inorder to metal(Ⅱ) ion in the [M(L)Cl₂] (M=Pb, Ni) system and the M-P bond strength were different inorder to halogen atom in the [Ni(L)X₂](X=Cl, Br, I) system. The complexes, [Ni(L)X₂](X=Cl, Br) become tetrahedral as they react with methyl iodide.
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New routes to the preparation of silver-soft liner nanocomposites as an antibacterial agent
이철재,정맹준,남기영,김동엽,김희진,Won Hui Doh,최현국 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
This study evaluated the antimicrobial and physical properties of silver-soft liner nanocomposites (Ag-SLN). Polymerized acrylic soft denture liner disk specimens containing 0 (control), 1500, 3000, or 6000 mg/L of silver nanoparticles were placed on the flat bottom of the separate 12-well cell culture plate dish and 100 mL samples of microbial suspensions of Escherichia coli strain were inoculated on each specimen and incubated at 37 ℃, for 24 and or 72 h. The antimicrobial effects were determined according to the number of viable cells in the retrieved suspension. Characterization of silver nanoparticles was carried out based on UV–vis spectroscopy and transmission electron microscopy (TEM) analysis. The specimens were characterized by thermal gravimetric analysis (TGA), field emission scanning electron microscope and energy dispersive X-ray analysis (FE-SEM/EDAX), and atomic absorption spectroscopy (AAS). We successfully prepared Ag-SLN and identified the great excellent antimicrobial activity for E coli.
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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.
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광학활성 코발트 (III) 착물과 라세미-코발트(II) 착물간의 입체선택적 전자전달반응
이동진,정맹준,도명기,Dong-Jin Lee,Maeng-Jun Jung,Myung-Ki Doh 대한화학회 1991 대한화학회지 Vol.35 No.5
광학활성인 ${\bigwedge}$-[CO(EDDS)]$^-$와 리간드의 conformation 변화에 있어 제한되는 착물인 $[Co({\pm}chxn)_3]^{2+}$간의 전자전달반응에 따른 입체선택성을 수용액 중에서 조사한 결과 4개의 conformational isomer($lel_3,\;lel_2ob,\;lelob_2,\;and\;ob_3)$가 존재하는 ${\Delta}-[Co(chxn)_3]^{3+}$가 생성되었으며 각 이성질체의 광학순도는 각각 22% e.e, 25% e.e, 11% e.e, 10% e.e로서 나타났다. Λ-[CO(EDDS)]-와 [Co($\pm$ chxn)$_3]^{2+}$간의 전자전달반응에 따른 입체선택성을 DMSO 중에서 반응시킨 결과 두 개의 conformational isomer($lel_3, lel_2ob$)을 포함하는 ${\bigwedge}$-[Co(chxn)$_3]^{3+}$가 생성되었으며 광학순도는 $lel_3$의 경우가 100% e,e로 나타났으며, $lel_2ob$의 경우는 75% e.e로 나타났다.
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