• Archives of Pharmacal Research
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• v.14 no.4
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• pp.379-384
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• 1991

The Knoevenagal reaction of malononitrile and acetylacetone gave the acyclic product 3 which was separated in a good yield and identified. The reactivity of 3 towards some chemical reagents is studied. Thus, the reaction of 3 with aromatic aldehydes, hydrazines and cyanomethylene derivatives gave products 6-12. Reaction of 3 with benzenediazonium chloride gave the primidine derivative 14.

• Journal of the Korean Chemical Society
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• v.36 no.5
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• pp.632-637
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• 1992

Standard transfer free energies of sodium and cupric perchlorates in water-acetylacetone solvent system have been determined by electromotive force measurements of galvanic cell and these energies of sodium and cupric ions in this solvent system have been evaluated by the tetrabutylammonium tetraphenylborate assumption as the extrathermodynamic procedure. Standard transfer free energy values of sodium and cupric ions from water to acetylacetone solvent were 5.09 and 4.16 kcal/mol at 25${\circ}C$, respectively. These values mean that acetylacetone is much weaker donor solvent to sodium and cupric ions than water. The standard transfer free energy value of cupric ion from water to mixture solvents which contain small amount of acetylacetone is changed by an unusual form. This is because of the chelate formation effect of acetylacetone to cupric ion.

• Journal of the Korean Ceramic Society
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• v.28 no.1
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• pp.60-66
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• 1991

The polymeric alumina sol was prepared by partial hydrolysis of aluminum sec-butoxide reacted with acetylacetone and its characteristics was investigated. The effects of alcohol solvent, acetylacetone, and acid concentration to the sol were investigated. FT-IR and Al27-MASNMR were used to study hydrolysis and polymerization reaction of aluminum complex. Synthesized sol showed the characteristics of polymeric alumina sol. To make a clear polymeric alumina sol, the optimum contents of acetylacetone, H2O and alcohol solvent were 0.4-0.6 mole, 0.25-1.25 mole, 3-5 mole per one mole alkoxide respectively. As a result of the Al27-MASNMR analysis, it was noted that hexa-penta-coordinated Al were main structure.

• Journal of Korean Society of Environmental Engineers
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• v.37 no.2
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• pp.81-86
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• 2015

A simple analytical method to quantify formaldehyde in water at lower levels (${\mu}g/L$) was developed using a high performance liquid chromatography (HPLC) and acetylacetone as a derivative reagent. Unlike conventional methods, no extraction and/or concentration were required. The derivative reagent was added into samples and reacted for 30 minutes at $80^{\circ}C$ prior to the analysis of formaldehyde using HPLC. The method detection limit and the limit of quantification for this method were 1.6 and $5.0{\mu}g/L$, respectively. This method also achieved high precision (0.6-3.0%) and accuracy (91.6-106.3%). The recovery rates for various environmental samples ranged from 92.0 to 115.2%.

• Bulletin of the Korean Chemical Society
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• v.35 no.7
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• pp.1999-2003
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• 2014

Indium tin oxide ($In_2Sn_{1-x}O_{5-y}$) nanoparticles were synthesized by hydrothermal method from stable indium tin acetylacetone complexes and postannealing at $600^{\circ}C$. The absence of chlorine ions shortened the synthesis process, decreased the particle agglomeration and improved the particle purity. The introduced complexing ligand acetylacetone decreased the obtained nanoparticle size. The improved powder properties accelerated the sintering of the $In_2Sn_{1-x}O_{5-y}$ nanoparticles and reached a relative density of 96.4% when pressureless sintered at $1400^{\circ}C$.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.02a
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• pp.301-301
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• 2011

We present theoretical investigations of the self-assembled growth of one-dimensional (1D) molecular lines directed across the dimer rows on the H-terminated Si(001) surface [1]. Based on density-functional theory calculations, a new growth mechanism of the 1D acetylacetone line is proposed [2], which involves the radical chain reaction initiated at two dangling-bond sites on one side of two adjacent Si dimers. It is also enabled that, if an H-free Si dimer were employed as the initial reaction site, a 1D acetylacetone line can grow along the dimer row. Our findings represent the first insight into the growth of 1D molecular lines not only across but also along the dimer rows on the H-terminated Si(001) surface.

• Journal of the Korean Chemical Society
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• v.24 no.3
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• pp.245-249
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• 1980

Uranium (Ⅵ) was extracted from dilute aqueous solutions of uranyl nitrate with acetylacetone and tri-n-butyl phosphate in n-dodecane. Synergistic effect was observed with the mixed reagents above pH 1. The species extracted are the 1:2:1 and the 1:2:2 uranyl-AA-TBP complexes. The extraction constants for these reactions have been determined.

• Journal of the Korean Chemical Society
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• v.31 no.3
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• pp.258-270
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• 1987

A series of new thorium nitrate complexes with crown ethers have been synthesized from the reaction of the hydrated thorium nitrate, with the appropriate crown ethers of different cavity sizes in various solvents such as methanol, ethanol, butanol, methylacetate, acetone, tetrahydrofuran and acetylacetone. CHN elemental analysis, ICPAS, thermal analysis and Karl-Fischer method have been used to characterize their compositions, and the spectroscopic methods of IR, UV, $^1H-NMR$, and X-ray diffraction have been employed to determine the structures and solvolysis phenomena of these complexes. and the electrical conductances were measured in DMSO, and water solvent. The solvolysis have been observed only in the complexes synthesized in acetylacetone solvent. In the solvated complexes of 15-crown-5 and 18-crown-6, the mole ratio of $Th^{4+}$: ligand : acetylacetone is found to be 1:1:1, but in the non-solvated complexes of 12-crown-4 and 15-crown-5, the mole ratios of Th:L are 1:2 and 2:3, respectively, and that in the complexes of both 18-crown-6 and dicyclohexano-18-crown-6 is 1:1. All complexes which were not solvated have shown $n{\to}{\sigma}^{\ast}$ electronic transitions of crown ether whereas complexes solvated have exhibited both $n{\to}{\sigma}^{\ast}$ of crown ether and $n{\to}{\pi}^{\ast}$ transitions of acac. The dissociation mole ratio of $Th^{4+}$ and nitrate ion is found to be 1:1 in aprotic solvent, and 1:4 in protic solvent like water.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.11a
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• pp.339-342
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• 1998

Ferroelectric L $a_2$ $Ti_2$ $O_{7}$(LTO) thin films were prepared by chemical solution deposition processes. Acetylacetone was used as chelating agent and nitric acid was added in the stock solution to control hydrolysis and condensation reaction rate. The LTO thin films were spin-coated on Pt/Ti/ $SiO_2$/(100)Si and Pt/Zr $O_2$/ $SiO_2$/(100)Si substrates. After multiple coating, dried thin films were heat-treated for decomposition of residual organics and crystallization. The role of acetylacetone in Ti iso-propoxide stabilization by possibly substituting $O^{i}$Pr ligand was studied by H-NMR. B site-rich impurity phase, i.e. L $a_4$ $Ti_{9}$ $O_{24}$, was found after annealing, where its appearance was dependent on process temperature indicating the possible reaction with substrate. Dielectric and other relevant electrical properties were measured and the results were compared between modified sol-gel and MOD processes.s.s.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1100-1101
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• 2015

In this work, the effect of addition of acetylacetone on microstructure and quality of nanoporous $TiO_2$ photo-electrodes was studied in dye-sensitized solar cells (DSCs) and structure and electrical properties of fabricated cells were investigated. From the results, the DSCs fabricated with acetyl acetone showed highest photovoltaic performances. This behavior may be attributed to paste agglomeration decrease and interconnection and bonding improvement between $TiO_2$ particles. Furthermore, the most favorable dye absorption time results to be 10h: exceeding this time a decrease in efficiency is observed despite the increasing amount of dye absorption. The $TiO_2$ photo-electrode prepared under the conditions of acetylacetone ratio of 15% and dye absorption time of 10hr showed the better photovoltaic performance ($J_{sc}=12.48mA/cm^2$, $V_{oc}=0.69V$, ff=0.68, ${\eta}=5.86%$).