• Journal of the Korean Chemical Society
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• v.35 no.2
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• pp.142-150
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• 1991

The complexation of hydrazide schiff base ligands such as N,N'-oxalylbis(salicylaldehyde hydrazone), N,N'-malonylbis(salicylaldehyde hydrazone), and N,N'-succinylbis(salicylaldehyde hydrazone) with Cd(II) ion was studied by polarographic method in DMSO solution. The order of stability constants was OBSH < MBSH < SBSH, and these ligands formed stable complexes with Cd(II) ion. The stability constants of complexation were measured at various temperatures. As the results, ${\Delta}$H and ${\Delta}$S of the complexation were distributed on the complex stabilities.

• Analytical Science and Technology
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• v.11 no.2
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• pp.145-149
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• 1998

Stability constants for the complexes of multidentate N,O-Schiff base ligands (bis-(salicylaldehyde)ethylendiamine(SED), bis-(salicylaldehyde)propylendiamine(SPD), bis-(salicylaldehyde)diethylenetriamine(SDT), bis-(salicylaldehyde)triethylenetetraamine(STT), and bis-(salicylaldehyde)tetraethylenepentaamine(STP) with Co(II) and Zn(II) were determined by a potentiometric method in a 70% dioxane-30% water mixture and ethanol, respectively. Stability constants for the complexes increased in the order of SPD

• Journal of the Korean Chemical Society
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• v.35 no.2
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• pp.135-141
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• 1991

The complexation of N,N'-oxalylbis(salicylaldehyde hydrazone) (OBSH) with Zn (II), Cd (II), and Pb(II) ions was studied by polarographic method in DMSO solution. The order of stability constants was Cd(II) < Zn(II) < pb(II), and all heavy metal ions formed stable complex with OBSH ligand. The stability constants of complexation were measured at various temperatures. As the results, enthalpy and entropy changes of the complexation were distributed on the complex stabilities.

• The Korean Journal of Mycology
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• v.8 no.2
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• pp.85-88
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• 1980

The antifungal activity of salicylaldehyde-o-phenylenediimine, a derivative of Schiff base, was studied in vitro against various species of fungi, especially, dermatophytes. The antifungal tests were performed according to the tube-dilution method, and all subcultures were incubated at room temperature for 14 days. Salicylaldehyde-o-phenylenediimine was effective against fungi such as Trichophyton mentagrophytes, Trichophyton rubrum, Microsporum canis and Fonsecaea compacta. Trichophyton mentagrophytes was inhibited at $20{\mu}g$ per ml, Trichophyton rubrum at $40{\mu}g$ per ml, Microsporum canis at $6{\mu}g$ per ml, and Fonsecaea compacta at $2{\mu}g$ per ml.

• Bulletin of the Korean Chemical Society
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• v.17 no.3
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• pp.223-227
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• 1996

Catalytic effects of transition metal (Co2+, Ni2+) complexes of N,N-bis(salicylaldehyde)-o-phenylenediimine (SOPD), N,N-bis(salicylaldehyde)-m-phenylenediimine (SMPD), and N,N-bis(salicylaldehyde)-p-phenylenediimine (SPPD), on the reduction of thionyl chloride at glassy carbon electrode, are evaluated by determining the kinetic parameters with cyclic voltammetric technique. The charge transfer process for the reduction of thionyl chloride is strongly affected by the concentration of the catalysts. Some quadridentate Schiff base-M(Ⅱ) complexes show sizable catalytic activities for the reduction of thionyl chloride. Catalytic effects of [M(Ⅱ)(SOPD)] complexes are slightly larger compared to [M(Ⅱ)2(SMPD)2] and [M(Ⅱ)2(SPPD)2] complexes. On those electrodes deposited with the catalysts, the observed exchange rate constants (ko) are in the range of 0.89-2.28 × 10-7 cm/s, while it is 1.24 × 10-7 cm/s on the bare glassy carbon electrode.

• Journal of the Korean Chemical Society
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• v.21 no.1
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• pp.3-15
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• 1977

Crystals of salicylaldehyde-4-morpholinothiosemicarbazone, $C_{12}H_{15}O_2N_3S$, are orthorhombic with space group Pna21. Unit-cell dimensions are a = 11.85(5), b = 15.45(5) c = 7.18(3)${\AA}$ with z = 4. Three-dimensional intensity data were collected from the multiple-film equi-inclination Weissenberg photographs taken with $CuK{\alpha}$ radiation. The intensities were estimated visually. The structure was solved by Patterson and Fourier methods and refined by the block-diagonal least-squares methods until the final R value becomes 0.11 for the 1064 observed independent reflections. The morpholine ring has a chair form. The rest atoms of salicylaldehyde-4-morpholinothiosemicarbazone molecule excluding morpholine ring and sulfur atom approximately lie on a plane. The hydroxyl group of the salicylaldehyde and the nitrogen atom of the thiosemicarbazone form an intramolecular hydrogen bond, $O-H{\cdot}{\cdot}{\cdot}N$, of 2.67${\AA}$. The short intermolecular distances all appear to be normal van der Waals contacts.

• Journal of the Korean Chemical Society
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• v.36 no.1
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• pp.95-99
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• 1992

A spectrophotometric method for the determination of copper using N,N'-Oxalylbis(salicylaldehyde hydrazone) as a chromogenic reagent has been developed. Determination has been performed by measuring the absorbances of the copper complexes in solutions containing 60% dimethylformamide (pH 2) at 422 nm. The method allows the determination of 0.4${\sim}$1.8 ${\mu}$g/ml of copper and has been applied to its determination in synthetic mixtures and alloy samples.

• Korean Journal of Environmental Agriculture
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• v.33 no.3
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• pp.213-219
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• 2014

BACKGROUND: In an environment-friendly agriculture, plant extracts have been perceived as alternatives of synthetic pesticides. The Environment-friendly Agriculture Promotion Act of Korea has approved cinnamon extract as a matter for the production of commercial biopesticides. Thirteen commercial biopesticides containing cinnamon extract have been marketed locally. However, the analytical method for the quality control of these biopesticides containing cinnamon extract has not been studied. METHODS AND RESULTS: Cartridge clean-up method for the determination of cinnamaldehyde, cinnamylalcohol and salicylaldehyde in biopesticides containing cinnamon extract was developed and validated by gas chromatography (GC). The clean-up method was optimized with HLB SPE cartridges for the bioactive substance in biopesticides containing cinnamon extract, and the eluate was analyzed by GC. The developed method was validated, and the LOQ and recovery rates of cinnamaldehyde, cinnamylalcohol and salicylaldehyde were 0.139, 0.067 and $0.062mgL^{-1}$ and 84.2, 86.5 and 82.1%, respectively. The contents of cinnamaldehyde, cinnamylalcohol and salicylaldehyde were analyzed using the developed method in the 13 commercial biopesticides. Results showed 0.06-17.37%,

• BMB Reports
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• v.33 no.1
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• pp.69-74
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• 2000

The Arabidopsis thaliana S-Adenosylmethionine decarboxylase (AdoMetDC) cDNA ($GenBank^{TM}$ U63633) was cloned, then the AdoMetDC protein was expressed and purified. The purified AdoMetDC was inactivated by salicylaldehyde in a pseudo first- order kinetics. The secondorder rate constant for inactivation was 126 $M^{-1}min^{-1}$ with the slope of n=0.73, suggesting that inactivation is the result of the reaction of one lysine residue in the active site of AdoMetDC. Site-specific mutagenesis was performed on the AdoMetDC to introduce mutations in conserved $lysine^{81}$ residues. These were chosen by examination of the conserved sequence and proved to be involved in enzymatic activity by chemical modification. Changing $Lys^{81}$ to alanine showed an altered optimal pH. The substrate also provided protection against inactivation by salicylaldehyde. Considering these results, we suggest that the $lysine^{81}$ residue may be involved in catalytic activity.

• Analytical Science and Technology
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• v.10 no.4
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• pp.246-255
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• 1997

A series of Ni(II) complexes with multidentate N, O-Schiff base ligands: ie [bis-(salicylaldehyde) ethylenediamine(SED), bis-(salicylaldehyde) propylenediamine(SPD), bis-(salicylaldehyde) dietrylenetriamine(SDT), and bis-(salicylaldehyde) triethylenetetraamine(STT)] and Ni(II) complexes were synthesized. The Ni(II) complexes were characterized by elemental analysis, IR, UV-Vis and mass spectrometry. The stability constants of each nickel (II) complexes were determined by potentiometry in 70% dioxane-30% $H_2O$ and ethanol. The stability constants of Nickel(II) complexs increased in the order of Ni(II)-SPD