염기성 용액에서 마젠타 아조메틴 색소의 퇴색 반응속도와 메커니즘

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이중호;김정성;김창수
Lee Joong-Ho;Kim Jung-Sung;Kim Chang-Su

  • 발행 : 2005.07.01

초록

A magenta azomethine dye(D) was synthesized from the reaction of 3-methyl-1-phenyl-2-pyrazoline-5-one with N,N-diethyl-1,4-phenylenediamine. The magenta azomethine dye was identified on the basis of elemental analysis, $^{13}C-NMR$, infrared, and GC/MS studies. The magenta azomethine dye was decomposed in a basic solution. Rate constants of the fading reaction of magenta azomethine dye in ethanol-water solvent were measured spectrophoto­metrically at 540 nm. Reaction rate was increased with the increase of $[OH\^{-}]\;and\;[H\_{2}O]$ in the region of $[H_{2}O]=11\~40\;M$. The reaction was governed by the following rate law. -d[D]/dt = $\{k_o\;+\;k_{OH}[OH^-][H_{2O}]\}[D]$ A possible mechanism consistent with the empirical rate law has been proposed.

키워드

Magenta azomethine dye;3-methyl-1-phenyl-2-pyrazoline-5-one;N;N-diethyl-1;4-phenylenediamine

참고문헌

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