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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Novel properties in alkali metal intercalated triphenylene

등록일
2015년 9월 3일 00시 31분 03초
접수번호
1170
발표코드
INOR.P-128 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
윤태경, 박치범1, 최희철*
포항공과대학교(POSTECH) 화학과, 기초과학연구원 CALDES, Korea
1기초과학연구원 CALDES, Korea
Since the first discovery of the superconductivity in potassium doped picene, numerous types of alkali metal intercalated polycyclic aromatic hydrocarbons (PAHs) have attracted significant interests to reach higher critical temperature. Notably, potassium doped 1,2:8,9-dibenzopentacene shows critical temperature up to 33 K, which is higher than former charge transfer type superconductors. For organic superconductors, alkali or alkali-earth metals are generally injected to organic molecules to provide additional electrons. However, the experimental limits according to this injection procedure make it hard to induce homogeneous doping and tolerate oxygen and moisture. In addition, the small size of crystallites can cause low shielding fraction and poor reproducibility. Thus in this work, to overcome these drawbacks, we made an effort to produce homogeneous alkali-metal-doped samples by making pellets. We chose triphenlyene as a target PAH molecule. These samples are annealed in a vacuumed glass chamber at various temperatures and time. The color of the annealed sample is changed into black, and we measured magnetic susceptibility and hysteresis to check the superconductivity. Also we tried to confirm whether the black powder conserves the former structure.

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