abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Directional assembly of layered rare-earth hydroxocation nanosheets and paradodecatungstate anions

등록일
2012년 8월 30일 16시 11분 54초
접수번호
1439
발표코드
MAT.P-1365 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
정희진, 변송호
경희대학교 화학과, Korea
The layered rare-earth hydroxides (LRHs) can be readily exfoliated to provide positively-charged nanosheets and the resulting nanosheets can be reconstructed with anionic molecules to form hierarchical superstructures. In this study, paradodecatungstate anions (H2W12O4210-) of high charge density were used as anionic linker for hydroxocation nanosheets. The direction of self-assembly depends on the structure of parent layered rare-earth hydroxide, ultimately resulting in micro-sized superstructures with different morphology. Thus, the assembly of [Eu2(OH)5·nH2O]+ and [Tb2(OH)5·nH2O]+nanosheets with [H2W12O42]10- produced hybrid structure with rectangular and quasi-hexagonal shape, respectively. These hybrids exhibit efficient energy transfer from the oxygen to metal charge transfer (OMCT, O2- → W6+) band to rare-earth ions in the hydroxide layers as well as highly enhanced f → f transitions. Because direct intercalation of polyanions into the interlayer galleries is difficult, this assembly approach will provide many opportunities to design and build more complicated (LRH nanosheet/POM) systems with new functions.

상단으로