• 대한화학회지
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• 제47권4호
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• pp.334-338
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• 2003

$[Co(phen)_2(Cl)(H_2O)] Clㆍ2H_2O$(phen=1,10-phenanthroline)의 결정구조는 X-ray에 의하여 결정되었다. 그 결정은 a=9.662(2), b=11.445(1), c=13.037(2)${\AA}$ ${\alpha}$=64.02(1), ${\beta}$=86.364(9), ${\gamma}=78.58(2)^°$ 그리고 Z=2의 격자인자를 갖는 triclinic계와 space group이 P1의 구조로 결정화 되었다. 배위된 양이온은 두개의 Phen 리간드, 하나의 chloride이온과 하나의 $H_2O$ 리간드가 cis 배열로 킬레이크된 6배위 코발트 원자가 포함된다. 코발트에 배위된 chloride에 더해서, 결정구조를 이루는 하나의 chloride이온과 네개의 물분자가 있다. 고체상태에서, 제목의 화합물은 수소결합을 통하여 3차원 그물구조를 갖는다.

• Bulletin of the Korean Chemical Society
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• 제15권8호
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• pp.641-643
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• 1994

Studies of Co(N-N)(3,6-DBSQ)(3,6-DBCat)(N-N=4,7-dimethyl-1 ,10-phenanthroline, 5-chloro-1,10-phenanthroline; DBSQ=di-tert-butylsemiquinonato; DBCat=di-tert-butylcatecholato) have been carried out on the bistability by intramolecular cobalt-quinone electron transfer in solid state. The title complexes dominantly exist as $Co^{III}$(N-N)(3,6-DBSQ)(3,6-DBCat) at room temperature and display a significant bistability on temperature variation. Subtle change in optical spectra and magnetic properties is observed when diimine ligands are changed.

• 대한화학회지
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• 제47권1호
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• pp.26-30
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• 2003

이핵 화합물, $Ag_2$[Phen]_2[S_2P(OPr)_2]_2$(Phen=1,10-phenanthroline; Pr=propyl)은 비스(디프로필디싸이오포스페이토) 은(|)화합물과 1,10 펜안트로린 리간드 반응에 의하여 합성되었고, 그 화합물 구조는 X-ray에 의하여 규명되었다. 두 디프로필디싸이오포스페이토 리간드는 두 개의 은 원자를 연결하여 팔각형 $Ag_2S_4P_2$ 고리를 형성하였고, 1,10-펜안트로린 리간드는 은 이온과 결합하여 사면체구조를 이루었다. Ag-S 결합거리는 2.471(1)와 2.567(1) ${\AA}$이었고, Ag-N 결합 거리는 2.3666(3)와 2.471(3) ${\AA}$이었다.

• 대한화학회지
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• 제36권5호
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• pp.661-668
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• 1992

MoCl_5와 NaNO_2 및 산성화시킨 FeSO_4의 reductive nitrosylation 반응을 통해 다핵 화합물인 [{Mo(NO)_2Cl_2}n]을 합성하였다. 이 [{Mo(NO)_2Cl_2}n]와 한자리 및 두자리 리간드를 반응시켜 높은 수득률(80∼90%)로 중성의 단핵 화합물인 [Mo(NO)2Cl2L2(or L-L)]을 얻었다. 사용한 리간드는 3,5-Lutidine, {\gamma}-Cyanopyridine, 1,2-Phenylenediamine, 1,10-Phenanthroline, sym-Diphenylethylenediamine, 9,10-Phenanthrenequinone, 1,3-Bis(diphenylphosphino)propane 및 8-Hydroxyquinoline 이였다. 합성한 dinitrosylmolybdenum 착물은 원소분석과 적외선, 핵자기 공명 및 전자 흡수 스펙트럼 등을 이용해서 그 특성을 조사하였다. 적외선 스펙트럼은 모든 화합물이 팔면체 구조로서 두 개의 NO 기가 cis 위치로 배위되어 있음을 보였다.

• Bulletin of the Korean Chemical Society
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• 제26권7호
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• pp.1057-1064
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• 2005

Photoluminescence (PL) spectra of Eu(III) and Tb(III) complexes with mixed oxydiacetate (ODA) and 1,10-phenanthroline (phen) ligands and with homoleptic ODA reveal characteristic line-splitting at 10 K, depending on the site-symmetry of the lanthanide ion in the complex. The energy-level schemes of the $^7F_J$ states and the emitting levels for Eu(III) and Tb(III) ions have been proposed by simulating the line splitting in the framework of crystal-field Hamiltonian. The sets of refined crystal-field parameters for the experimentally determined sitesymmetry satisfactorily reproduce the experimental energy-level schemes. In addition, the PL quantum yield and the decay time were determined at room temperature. The PL quantum yields of [$Eu(ODA){\cdot}(phen){\cdot}4H_2O]^+$ and [Tb$(ODA){\cdot}(phen){\cdot}4H_2O]^+$ in the crystalline state (Q = 17.7 and Q = 56.6%, respectively) are much greater than those of [Eu($ODA)_3]^{3-}and\;[Tb(ODA)_3]^{3-}$(Q = 1.1 and Q = 1.3, respectively), due to the energy transfer from phen to the lanthanide ion. In the aqueous state, the relaxation of the phen moiety due to the solvent results in the reduction of the quantum yield and the shortening of the lifetime.

• Bulletin of the Korean Chemical Society
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• 제33권7호
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• pp.2299-2304
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• 2012

Two new metal(II) complexes, $[Mn(dpa)(phen)(H_2O)_2]_n$ (1) ($H_2dpa$ = dephenic acid, phen = 1,10-phenanthroline) and $[Ni_2(nda)(phen)_2(H_2O)_6](nda)(H_2O)$ (2) ($H_2nda$ = 2,6-naphthalenedicarboxylic acid) have been synthesized and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and single crystal X-ray diffraction. In complex 1, Mn(II) ion is six-coordinated, and Mn(II) ions are bridged by dpa ligands into 1D chains. While, the complex 2 is dimer and two Ni(II) ions are bridged by one nda ligand cooperated with the terminal ligand phen. In each complex, the dicarboxylate ligand is coordinated to metal(II) ions as a bis-monodentate.

• Bulletin of the Korean Chemical Society
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• 제31권6호
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• pp.1615-1620
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• 2010

Bis-[dipyrido[3,2-$\alpha$:2',3'-c]phenazine)$_2$(1,10-phenanthroline)$_2Ru_2$]$^{2+}$ complexes (bis-Ru(II) complexes) tethered by linkers of various lengths were synthesized and their binding properties to DNA investigated by normal absorption and linear dichroism spectra, and fluorescence techniques in this study. Upon binding to DNA, the bis-Ru(II) complex with the longest linker (1,3-bis-(4-pyridyl)-propane), exhibited a negative $LD^r$ signal whose intensity was as large as that in the DNA absorption region, followed by a complicate $LD^r$ signal in the metal-to-ligand charge transfer region. The luminescence intensity of this bis-Ru(II) complex was enhanced. The observed $LD^r$ and luminescence results resembled that of the [Ru(1,10-phenanthroline)$_2$ dipyrido[3,2-$\alpha$:2',3'-c]phenazine]$^{2+}$ complex, whose dipyrido[3,2-$\alpha$:2',3'-c]phenazine (dppz) ligand has been known to intercalate between DNA bases. Hence, it is conclusive that both dppz ligands of the bis-Ru(II) complex intercalate. The binding stoichiometry, however, was a single intercalated dppz per ~ 2.3 bases, which violates the "nearest binding site exclusion" model for intercalation. The length between the two Ru(II) complexes may be barely long enough to accommodate one DNA base between the two dppz ligands, but not for two DNA bases. When the linker was shorter (4,4'-bipyridine or 1,2-bis-(4-pyridyl)-ethane), the magnitude of the LD in the dppz absorption region, as well as the luminescence intensity of both bis-Ru(II) complexes, was half that of the bis-Ru(II) complex bearing a long linker. This observation can be elucidated by a model whereby one of the dppz ligands intercalates while the other is exposed to the aqueous environment.

• 대한화학회지
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• 제44권2호
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• pp.95-101
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• 2000

2-hydroxy-3-hydroxymethy1-5-methylbenzaldehyde(HHMMB)와 ethylenediamine 혹은 1,3-dia-minopropane의 축합반응에 의해 6-배위 칸막이 리간드, $H_4L[A]$와 $H_4L[B]$를 각각 얻은 후에 거대비고리 리간드 착물, $Cu(H_2L[A]).H_2O$, $Cu(H_2L[B]).H_2O$, CuFe(L[A]($NO_3$).$4H_2O$, CuFe(L[B])($NO_3$).$4H_2O$, [$CuGd(H_2L[A])(NO_3)_2](NO_3).2CH_3OH$, [CuGd($H_2L$[B])($NO_3)_2$]($NO_3).2CH_3OH를 합성하였다. 2,6-diformyl-p-clesol (DFPC)로부터 합성한 Ln-거대고리([20]DOTA)착물,[Ln([20]DOTA)($NO_3)(H_2O)$]($NO_3$)2.$xH_2O${Ln(III)=Pr, Sm, Gd, Dy를 methanol 용매에 2일 정도 정치함으로써 [Ln([20]DOTA)($NO3$)($CH_3OH)]^{2+}$을 얻을 수 있다. 이 lanthanide-[20]DOTA착물에서 배위된 $CH_3OH$이 주게원자가 N 혹은 O인 두자리 보조리간드, $L_a$(=o-phenylenediamine,1,10-phenanthroline, ethylenediamine,oxalic acid, malonic acid, acethyl-acetone에 의해 치환될 때 평형상수(K)를 $25^{\circ}C\;{\mu}=0.1M\;NaClO_4$ 에서 분광학적 방법으로 결정하였다. 보조리간드의 $pK_a$는 o-Phenylenediamine < 1,10-ptlenanthroline < ehylenediamine,oxalic acid < malonic acid < acethylacetone이며, 이때 평형상수, K는 ethylenediamine < 1,10-phenanthroline < o-phenylenediamine,acethylacetone < malonic acid < oxalic acid 경향으로 변하였다.

• Bulletin of the Korean Chemical Society
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• 제24권12호
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• pp.1775-1780
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• 2003

A continuous flow system has been developed to determine trace Cu(II), Mn(II), Ni(II) and Zn(II) in a large volume of water samples by a solvent sublation technique. The mixed solution of 1,10-phenanthroline(phen) and thiocyanate ion was used as ligands for the formation of their ternary complexes. The continuous system was constructed in this laboratory with a peristaltic pump, a mini shaker, three mixing bottles and a flotation cell by connecting each part with a polyethylene tube. The flotation conditions such as the flow rate of sample solution and the injection rates of ligand, buffer and surfactant solutions have been investigated to obtain the best sublation efficiencies. Each solution flowed into the flotation cell through each polyethylene tube by the peristaltic pumps. The ternary complexes were floated and extracted into MIBK in a flotation cell of 2 L by bubbling a nitrogen gas. The absorbances of extracted analytes in MIBK were directly measured by graphite furnace-AAS. The concentrations of 1,10-phenanthroline and thiocyanate ion were $2.6\;{\times}\;10^{-3}$ M and $2.3\;{\times}\;10^{-2}$ M in the mixed solution, respectively. The pH of sample solution was adjusted to 5.0 with a buffer solution and 1%(m/v) sodium lauryl sulphate solution was added as a surfactant to support the effective flotation of the complexes. The $N_2$ gas was bubbled at 30 mL/min for 90 minutes for 20 L of sample. Reproducible results of less than 10% RSD and recoveries of 80-120% could be obtained in real samples.

• Bulletin of the Korean Chemical Society
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• 제31권2호
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• pp.487-490
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• 2010