한국염색가공학회지 (Textile Coloration and Finishing)

  • 제5권3호
  • /
  • Pages.216-220
  • /
  • 1993
  • /
  • 1229-0033(pISSN)
  • /
  • 2234-036X(eISSN)
한국염색가공학회 (The Korean Society of Dyers and Finishers)
권호 표지

3,3’-Diethyl-9-Methyl-Thiacarbocyanine 색소 2 분자 회합체의 해리평형

Dissociation Equilibrium of Dimeric Association of 3,3-Diethyl-9-Methyl-Thiacarbocyanine Dye

  • 김성훈 (경북대학교 공과대학 염색공학과) ;
  • 김재홍 (경북대학교 공과대학 염색공학과) ;
  • 송경헌 (배제대학교 의류학과) ;
  • 임용진 (경북대학교 공과대학 염색공학과)
  • 발행 : 1993.09.01
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초록

Dissociation constants and heat of dissociation of dimers of 3, 3'-diethyl-thiacarbocyanine dye(Dye 2) have been studied. At $10~40^{\circ}C$, absorption spectra of 2 vol% aqueous ethanol solutions of Dye 2 showed monomer and dimer bands. From the temperature dependence of monomer absorbance, dissociation constants K and ${\Delta}H$ were estimated to be $6.2(10^{\circ}C)-10.6(40^{\circ}C)mon/\ell$ and 3kcal/mol, respectively. These K valus are about one half of those for 3,3'-diethyl-2,2'-cyanine dye with one methine carbon, indication a higher dimer stability than that of 3,3-diethyl-2,2'-cyanine dye.

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