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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
대회명 대한화학회 제121회 학술발표회 및 총회
등록일 2018년 02월 05일 13시 02분 29초
접수번호 3705
발표코드 ORGN.P-334 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간 4월 19일 (목요일) 11:00~12:30
발표형식 포스터
발표분야 Organic Chemistry
저자 및 공동저자 Suk-Hee Moon, Hansu Im1, Ki-Min Park2,*
Department of Food & Nutrition, Kyungnam College of Information & Technology, Korea
1Department of Chemistry, Gyeongsang National University, Korea
2Research Institute of Natural Science, Gyeongsang National University, Korea
제목 Guest-induced Calix[6]arene Carboxylate Derivative Adopting 1,3,5-Alternative conformation
내용 Calixarenes are a class of macrocycles or cyclic oligomers possessing a cavity capable of accepting a guest molecule. Calix[4]arene derivatives adopt one of four conformations such as cone, patial cone, 1,3-alternative, and 1,2-alternative conformations owing to the rigid aromatic core of calix[4]arene. However, calix[6]arene derivatives cannot be determined their conformations because of their flexible conformations caused by the large ring size which can allow larger guests to be accepted. We have employed calix[6]arene hexaacetic acid (H6CHA) to explore its conformation change caused by the accommodation of guest molecules. When cyclohexane-1,4-diamine as a guest was added into the methanol solution of H6CHA, cyclohexane-1,4-diamonium dication, obtained by acid-base reaction between H6CHA and the guest diamine, is accommodated into the ring cavity of the CHA6- through C―H…π interactions. Moreover, the conformation of CHA6- changes into 1,3,5-alternative form. On the other hand, cyclohexylammonium cations obtained by the addition of cyclohexylamine as a guest are not accommodated in the cavity of CHA6-. Herein, we report the synthesis and characterization of the 1,3,5-alternative calix[6]arene hexaacetate accommodating cyclohexane-1,4-diammonium dication as well as the conformational change of calix[6]arene carboxylate derivative caused by the guest species.
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