Korean Chemical Engineering Research

  • 제45권5호
  • /
  • Pages.487-492
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  • 2007
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지

G2NDS 호스트의 선택적 내포 현상을 이용한 Dibromobenzene 이성질체의 분자분리

Molecular Separation of Dibromobenzene Isomers by using Selective Guest Inclusion of G2NDS Host Framework

  • 김진수 (서울대학교 공과대학 화학생물공학부) ;
  • 박지민 (서울과학고등학교) ;
  • 이종협 (서울대학교 공과대학 화학생물공학부) ;
  • 김우식 (경희대학교 공과대학 응용생물공학부)
  • Kim, Jinsoo (School of Chemical and Biological Engineering, Seoul National University) ;
  • Park, Jimin (Seoul Science High School) ;
  • Yi, Jongheop (School of Chemical and Biological Engineering, Seoul National University) ;
  • Kim, Woo-Sik (Department of Chemical Engineering, Kyung Hee University)
  • 투고 : 2007.01.09
  • 심사 : 2007.05.15
  • 발행 : 2007.10.31
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초록

본 연구에서는 $G_2$[naphthalene disulfonate] 숙주 분자(host molecule)의 선택적 내포현상을 이용하여 구조적 이성질체인 1,2-dibromobenzene과 1,3-dibromobenzene을 분리하였다. 혼합 이성질체 용액에서 $X_{1,3-DBB}=0.3$ 이상 일 때, 숙주 분자는 1,3-dibromobenzene 손님 분자(guest molecule)에 대해 내포 선택도가 높았으나, $X_{1,3-DBB}=0.2$ 이하의 용액에서는 1,2-dibromobenzene 손님 분자에 대한 내포 선택도가 높았다. 이것은 용액의 조성에 따라 특정 이성질체가 숙주 분자 구조의 주형 역할을 하여 해당 분자에 대한 손님 분자로서의 내포 선택도를 결정하기 때문이다. 이러한 숙주 분자 구조에 대한 손님 분자의 주형 역할은 순수 이성질체 용액 및 혼합 이성질체 용액에서 생성된 내포 화합물의 X-ray 회절 분석 결과로부터 확인할 수 있었다. 한편, 열시차분석(DSC)에서 (1,3-dibromobenzene)-내포 화합물이(1,2-dibromobenzene)-내포 화합물 보다 안정하여 손님 분자를 숙주 분자로부터 유리시키는 더 많은 에너지를 요구하였다. 이러한 열적 안정성은 $G_2$[naphthalene disulfonate] 숙주 분자가 더 넓은 농도 범위에서 1,3- dibromobenzene에 대해 선택도를 갖는 것과 부합하는 결과이다. 본 연구에서는 숙주 분자의 선택도와 내포 화합물의 열적 안정성과의 관련성을 도출해 냈으며, 열적 안정도 평가가 숙주분자의 선택적 내포 현상을 예측할 수 있는 수단으로 적용될 가능성을 확인할 수 있었다.

Using the selective host-guest inclusion of $G_2$[naphthalene disulfonate], the structural isomers of 1,2-dibromobenzene and 1,3-dibromobenzene were separated. As such, 1,3-dibromobenzene was selectively included as guest into the host framework in mixture isomers over 30% fraction of 1,3- dibromobenzene ($X_{1,3-DBB}=0.3$) whereas 1,2-dibromobenzene as guest was selective to the inclusion below $X_{1,3-DBB}=0.3$. This was due to the selectivity of host framework toward the guest molecules playing a role of template to the host framework. From the powder pattern XRD of inclusion compounds crystallized in pure isomer and mixture solutions, the template roles of guest molecules to the host framework were confirmed. Using the DSC, it was found that the more energy was required to release 1,3-dibromobenzene of guest from the host framework than 1,2-dibromobenzene due to the higher thermal stability. The thermal stability of the $G_2NDS$-1,3-dibromobenzene inclusion compound was consistent with the high selectivity of 1,3- dibromobenzene to the host framework in broad range of fraction in the isomer mixture

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과제정보

연구 과제 주관 기관 : 한국과학재단

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