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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Proton Conduction Behavior in Cucubit[6]uril-based Organic Molecular Porous Materials

2011년 8월 1일 13시 07분 48초
Ⅱ-MAT.P-265 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 <발표Ⅱ>
저자 및
서경원, 윤민영, 김현욱1, 김용휘, N. Selvapalam, 김기문
포항공과대학교 화학과, WCU 첨단재료과학부, Korea
1Department of Chemistry, Standford University, United States
The search for new high proton conducting materials has been a subject of intense research because of their potential applications in fuel cell, sensor and other areas. In recent years, metal-organic frameworks (MOFs) with well-defined pores have been investigated for this purpose because guest molecules such as water and imidazole in the channels, and/or functional groups lining the channels can provide proton conduction pathways. Similar to MOFs, in principle, organic molecular porous materials may serve as good proton conductors, but the investigation of their proton conduction behavior is still rare. Here we present proton conduction behavior of cucurbituril-based organic molecular porous materials. The isostructural organic porous materials showed different proton conductivity depending on the nature and amount of acid molecules present in the 1D channels. The porous cucurbit[6]uril containing sulfuric acid in the channels showed the highest conductivity and the lowest activation energy among the series, which are comparable to the highest values of MOFs or organic proton conducting materials. In addition, the highly anisotropic conduction behavior through the 1D channels of the porous CB[6] was studied by single crystal conductivity measurements. Much higher conductivity along the channel direction than that perpendicular to the channel direction was observed. To the best of our knowledge, the porous CB[6] containing sulfuric acid in the channels showed the highest anisotropic proton conductivity (σ= 8600) among the known proton conducting materials so far. The highly anisotropic proton conductivity compared to that of polymeric materials suggests their potential utility in device applications in which highly directional proton conduction is desired.