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- W49178052 abstract "Cyclohexanone,과 tris(2-aminoethyl)amine을 이용하여 Schiff 연기 축합반응으로 tren의 유도체인 tris(2-cyclohexylaminoethyl)amine (L)을 합성하였다. 또한 합성한 tren의 유도체인 tris(2-cyclohexylaminoethyl)amine (L)과 Zn(II) 착물의 열역학적 특성과 안정도 상수, Zn(II)와의 착물 조성비 등을 순환전압전류법과 열량계법으로 측정하였다. Zn(II)과 [Zn(II)-L] 순환전압전류 곡선을 0<TEX>${sim}$</TEX>-1.5 V vs. Ag/AgCl의 가전압 범위에서 측정하였다. 금속인 경우, -1.02V와 -0.48V vs. Ag/AgCl에서 각각 환원피이크와 산화피이크가 나타났으며, 금속착물인 경우에는 -1.19V와 -0.45V vs. Ag/AgCl에서 각각 환원피이크와 산화피이크가 나타났다. 또한 피이크 전류(IP)는 주사속도의 평방근 <TEX>$(v^{1/2})$</TEX>에 비례하였으며 이것은 전류의 유형이 확산 지배적인 전류임을 나타낸다. 그리고 [Zn-L] 착물에 대해서 전압전류법적으로 구한 안정도상수는 logK<TEX>$_f$</TEX> = 5.8, 결합비는 1:1을 나타내었다. 또한 열량계법적으로 [Zn-L] 착물의 열역학적 파라메타를 조사한 결과, 리간드 L과 Zn(II)는 1:1의 4 배위수를 가지는 착물을 이룬다는 것을 알 수 있었고, 이때 25 <TEX>${circ}$</TEX>C에서 logK=5.4, <TEX>${Delta}H$</TEX>= -53.0 kJ/mol, <TEX>${Delta}$</TEX>G의 값은 -31.1 kJ/mol이었으며 T<TEX>${Delta}$</TEX>S는 -21.9 J/K<TEX>${cdot}$</TEX>mole이었다. Tris(2-cyclohexylaminoethyl)amine (L) was synthesized by the Schiff base condensation reaction of tris(2-aminoethyl)amine with cyclohexanone, followed by reduction. The thermodynamic characteristics, mole ratio and formation constant of [Zn(II)-L] complex were measured by the cyclic voltammetry and isothermal titration. In the case of Zn(II), well-defined cathodic and anodic peak were obtained at -1.02V and -0.48V vs Ag/AgCl , respectively. For the [Zn(II)-L] complex, both peaks were obtained at -1.19V and -0.45V vs Ag/AgCl, respectively. In addition, the peak height gradually increases as the scan rate increases, suggesting that the currents obtained were diffusion - controlled. The mole ratio and stability constant of the complex measured cyclic voltammerty were 1:1 and logK<TEX>$_f$</TEX>= 5.8, respectively. And the mole ratio and stability constant of the complexe calculated by isothermal titration method was 1:1 and logK =5.4, respectively. <TEX>${Delta}$</TEX>H, <TEX>${Delta}$</TEX>G and T<TEX>${Delta}$</TEX>S for the complex formation were -53.0 kJ/mol, -31.1 kJ/mol, and -21.9 J/K at 25 <TEX>${circ}$</TEX>C, respectively." @default.
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- W49178052 date "2003-04-20" @default.
- W49178052 modified "2023-09-25" @default.
- W49178052 title "Stability of Tris(2-cyclohexylaminoethyl)amine-Zn(II) Complex" @default.
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- W49178052 doi "https://doi.org/10.5012/jkcs.2003.47.2.121" @default.
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