Aminophosphine류 리간드가 배위된 Ni(Ⅱ) 착물, Ni(L)X$_2$ 및 [Ni(L)$_2$]Cl$_2$ (L = L$_1$, L$_2$ ; X = Cl$^-$, Br$^-$, I$^-$)의 합성과 성질

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

1,2-bis{(diphenylphosphino)amino}propane(L$_1$) , 1,2-bis{(diphenylphosphino)amino}ethane(L$_2$)이 배위된 니켈(Ⅱ)착물, [Ni(L)X$_2$] 및 Ni(L$_2$)Cl$_2$(L = L$_1$, L$_2$ ; X = Cl$^-$, Br$^-$, I$^-$)을 합성하고 분광학적 성질을 조사하였다. X = Cl$^-$ 또는 Br$^-$인 경우에는 사각평면형 착물의 특성을 보였고, I$^-$는 사면체형 착물의 특성을 나타내었다. 합성된 Ni(L)X$_2$착물은 극성을 가진 유기용매(EtOH, DMSO, THF 및 DMF)를 반응시켰을 때 용매의 주개 수(donor number)값에 따라 가용매분해반응이 진행됨을 전자흡수스펙트럼으로 확인하였다. 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.

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.

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.

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.

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.

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. The stereoselectivity on the electron-transfer reaction between optical active ${\bigwedge}$-[CO(EDDS)]- and conformationally restricted complex $[Co({\pm}chxn)_3]^{2+}$ has been examined in aqueous solution. The products are four conformational isomers $(lel_3,\;lel_2ob,\;lelob_2,\;and\;ob_3)$ of ${\bigwedge}$-[Co(chxn)$_3]^{3+}$ with optical purities of 22% e.e, 25% e.e, 11% e.e, and 10% e.e, respectively. The reaction between ${\bigwedge}$-[CO(EDDS)]- and $[Co({\pm}chxn)_3]^{2+}$ in DMSO produced lel3-${\Delta}$ and lel2ob-${\Delta}$-[Co(chxn)$_3]^{3+}$ whose optical purities are 100% e.e, and 75% e.e, respectively.

자외선 공명 라만분광법을 이용한 Doxorubicin과 Adenine의 상호작용 연구

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

항암제인 독소루비신과 아데닌과의 상호작용을 알아보기 위하여 10-3~10-4의 수용액상 농도 범위에 서 1 : 2의 부피비로 혼합하여 조사하였다. 자외선 공명라만 분광법과 표면증강 라만 분광법을 이용하여 수용 액상에서 독소루비신 분자의 아데닌 분자에 대한 결합 자리를 알아 본 결과 독소루비신 분자는 아데닌 분자 의 7번 위치의 질소와 상호작용 가능성을 확인할 수 있었다. 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.

포스핀류가 배위된 팔라듐 착물에 의한 불포화카르복실산의 카르보닐화 고리반응 (제 3 보). 팔라듐 (0, II)-포스핀계 착물에 의한 불포화카르복실산의 카르보닐화 반응 및 그의 이론적 연구

도명기,김봉곤,정맹준,송영대,박병각,Myung-Ki Doh,Bong-Gon Kim,Maeng-Jun Jung,Young-Dae Song,Park Byung-Kak 대한화학회 1993 대한화학회지 Vol.37 No.10

팔라듐(0, II)-포스핀계 착물을 촉매로 하여 crotonic acid, methacrylic acid 및 3-butenoic acid 같은 불포화가크복실산의 카르보닐화 고리반응에서 생성가능한 물질의 구조를 확인하고, 그 반응메카니즘을 MM2 와 EHMO 계산에 의해서 추정하였다. 이 반응은 ${\pi}$ -착물을 거쳐 금속 함유 고리화합물을 만든 다음 산화성 첨가반응과 환원성 제거반응이 일어나 진행된다. ${\pi}$ -착물을 안정화시키는 crotonic acid, methacrylic acid 등은 카르보닐화 고리반응이 진행되지 않고, 3-butenoic acid는 무수카르복실산 유도체로서 glutaric anhydride와 3-methylsuccinic anhydride 및 이중결합이 자리옮김된 crotonic acid가 얻어졌다. Reaction mechanism of palladium(0, II)-phosphines complexes catalyzed cyclocarbonylation for unsaturated carboxylic acid such as crotonic acid, methacrylic acid and 3-butenoic acid has been investigated by product analysis, molecular mechanics and extended Huckel molecular orbital method. Reaction of 3-butenoic acid with palladium(0, II)-phosphines catalyst gives palladium containing cycloester through intermediate palladium-olefin ${\pi}$ -complex in the catalytic carbonylation. Palladium(0, II)-phosphines complexes catalyze the cyclocarbonylation of 3-butenoic acid to give 3-methylsuccinic anhydride and glutaric anhydride. But ${\pi}$ -complexes with palladium(0, II)-phosphines and unsaturated carboxylic acids such as crotonic acid and methacrylic acid are not effective the catalytic cyclocarbonylation.

포스핀류가 배위된 팔라듐 착물에 의한 불포화카르복실산의 카르보닐화고리 반응 (제 2 보). 불포화카르복실산이 배위된 팔라듐 (0, II) 착물에 관한 이론적 연구

도명기,김봉곤,정맹준,송영대,박병각,Doh Myung-Ki,Bong-Gon Kim,Maeng-Jun Jung,Young-Dae Song,Byung-Kak Park 대한화학회 1993 대한화학회지 Vol.37 No.4

Acrylic acid, methacrylic acid, crotonic acid(A 그룹), 또는 3-butenoic acid 4-pentenoic acid(B group) 등이 배위된 bis(trimethylphosphine) 팔라듐(O) 착물에서 ${\pi}$-및 metallacycle의 안정한 구조와 반응성을 분자역학법과 확장분자궤도함수법으로 조사하였다. 올레핀의 HOMO 및 LUMO 계수가 큰 A 그룹 리간드는 ${\pi}$-착물이 안정화되고, LUMO 계수가 상대적으로 적은 B 그룹 리간드는 금속함유고리화합물이 안정하였으며, 특히, 3-butenoic acid에서는 6원고리 화합물보다 메틸기를 갖는 5원고리 화합물이 더 안정함을 알 수 있었다. The structure and reactivity of ${\pi}$-and metallacycle form in the bis(trimethylphosphine) palladium(0) complexes with acrylic acid, methacrylic acid, crotonic acid(A group) and 3-butenoic acid, 4-pentenoic acid(B group) have been investigated by Molecular Mechanics and Extended Huckel Molecular Orbital method. The calculation shows that A groups with large value of frontier electron density of HOMO and LUMO produce $\pi-complexes$ instead of metallacycle. But B groups with small value of frontier electron density of LUMO, especially 3-butenoic acid, form stable metallacycle. Moreover the methyl-substituted five-membered compared with the six-membered metallacycle is energetically stable conformation.