• Bulletin of the Korean Chemical Society
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• v.30 no.10
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• pp.2338-2340
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• 2009

Ionic palladium(II) complex containing a long aliphatic chain, [(tmeda)$PdL]_2(PF_6)_4$ (tmeda = N,N,N',N'-tetramethylethylenediamine; L = decylmethylbis(m-pyridyl)silane) allowed to form a puckered submicrosphere morphology without any template or additive. The puckered spheres reversibly adsorb and desorb dioxane molecules. Coligand and cosolvent effects on the formation of submicrospherical morphology were observed.

• Bulletin of the Korean Chemical Society
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• v.31 no.12
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• pp.3844-3847
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• 2010

• Bulletin of the Korean Chemical Society
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• v.15 no.11
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• pp.945-949
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• 1994

Mixtures of cyano complexes of palladium(II) and platinum(II) were separated by capillary electrophoresis using a fused silica capillary as a separation column and 30 mM phosphate buffer (pH 7) containing 15 wt. % acetonitrile as a running buffer. By virtue of the high ionic mobilities of the negatively charged cyano complexes of Pd(II) and Pt(II), they were separated using a cathodic injection and anodic detection scheme. The metal complexes eluted through the capillary were detected by direct UV absorption at 214 nm. A linear relationship between peak area and concentration was obtained for both ions and the detection limit was lower than $10^{-14}$ mole. The proposed method was applied to real sample, e.g., anode slime obtained from an electrolytic copper refinary, as a method for the simultaneous determination of palladium and platinum.

• Bulletin of the Korean Chemical Society
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• v.33 no.12
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• pp.4069-4073
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• 2012

Metallacyclodimeric complexes of $[(Me_4en)Pd(L)]_2(ClO_4)_4$ ($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; L = dimethylbis(4-pyridyl)silane (dmps), methylvinylbis(4-pyridyl)silane (mvps)) have been synthesized, and their structures have been characterized by X-ray single crystallography. The skeletal structures consist of one 20-membered metallamacrocycle, two 5-membered metallacycles, and four pyridyl groups. The local geometry around the palladium(II) ion approximates to a typical square planar arrangement with four nitrogen donors. Delicate difference in catalytic effects on hydrogenation was investigated based on the structure of catalyst and substrates.

• Bulletin of the Korean Chemical Society
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• v.31 no.8
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• pp.2223-2227
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• 2010

Reaction of [(bpy)Pd]$(PF_6)_2$ (bpy = 2,2'-bipyridine) with racemic bis(isonicotinoyl)-1,1'-bi-2-naphtholate (L) in acetone, and followed by addition of chloroform and solvent evaporation allows to form amorphous micro-bowl morphology consisting of $[(bpy)PdL]_2(PF_6)_4$ without any template or additive. In contrast, the reaction and recrystallization in acetone for 1 week produce parallel-piped single crystals consisting of $[(bpy)_3Pd_3({\mu}_3-HPO_4)_2](PF_6)_2$. The formations of micro-bowl and parallel-piped single crystal morphologies appear to be primarily associated with the kinetic and thermodynamic control, respectively. The formation of micro-bowls may be attributed to eruption of organic solvents. Cosolvent effects and chemical properties on the formation of micro-bowl morphology have been observed.

• Bulletin of the Korean Chemical Society
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• v.34 no.4
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• pp.1127-1130
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• 2013

Formation of the monodisperse submicrospheres consisting of ionic palladium(II) complexes, $[(Me_4en)Pd(L)]_2(X)_4$($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; L = bis(4-(4-pyridylcarboxyl)phenyl)methane; $X^-=BF_4{^-}$ and $ClO_4{^-}$), has been carried out without any templates or additives. The submicrospheres were coated with silicates, and then calcined in air at $550^{\circ}C$ for 1 h, to efficiently form hollow-spherical $SiO_2$ submicro-reactors dotted with palladium(0) nanoparticles (PdNPs). That is, the submicrospheres act as both a template and a source of the palladium metal nanoparticles. The submicro-reactors containing nano-catalysts have been characterized by means of SEM, TEM, and XPS. Notably, the reactors were proved to be very effective for Suzuki-Miyaura cross-coupling and hydrogenation reactions.

• Journal of the Korean Chemical Society
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• v.39 no.4
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• pp.244-251
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• 1995

The palladium(II) complexes(where, [Pd(L)2X2], L=isoxazole(isox), 3,5-dimethylisoxazole(3,5-diMeisox), 3-methyl, 5-phenylisoxazole(3-Me, 5-Phisox), and 4-amino, 3,5-dimethylisoxazole(4-ADI); X=Cl, Br] with isoxazole and its derivatives are investigated on antitumor activity by EHMO calculation. It is found that the net charge of the two halogen atoms in trans-isomers are greater than those in cis-ones, indicating that ionic character of Pd-X bond in trans-isomers is greater than that of cis-ones, and so dissociation of Cl- ion is easier than that of Br- ion in aqueous solution in body. Furthermore, it is found that the ${\sigma}MO$ energy of Pd(dx2-y2)-X(px) bond $(E{\sigma}(Pd-X))$ is higher than that of Pd(dx2-y2)-N(px) bond $(E{\sigma}(Pd-N))$ without exception, about all the complexes, and also the $E{\sigma}(Pd-X)$ of trans-isomers is higher than that of cis-isomers. From the above facts, the degree of dissociation in Pd-X bond would be related to antitumor activity. In fact, the linear equation of correlation coefficient 0.96 is fairly established between ${\Delta}E{\sigma}(N-X)(E\sigma(Pd-N)－E{\sigma}(Pd-X))$ and inhibitory activity coefficient, logIA.