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Spiro-Silacycloalkyl Tetraphenylsiloles with a Tunable Exo-Cyclic Ring: Preparation, Characterization, and Device Application of 1,1′-Silacycloalkyl-2,3,4,5-tetraphenylsiloles

등록일
2007년 2월 13일 12시 05분 11초
접수번호
1085
발표코드
금8D5심 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 11시 : 00분
발표형식
심포지엄
발표분야
무기화학 - Main Group Element Chemistry
저자 및
공동저자
손호진, 한원식, 전지연, 고재중, 강상욱
고려대학교 소재화학과,
A series of 2,3,4,5-tetraphenylsiloles, with a four- to six-membered silacyclo alkyl substituent at the 1,1′-position, has been prepared by a one-pot synthesis of dilithium diyne with the corresponding silacycloalkyl dichlorosilane precursors. The photophysical properties of the silacycloalkyl siloles were examined to elucidate the structure–photophysical property relationship arising from variation of the exocyclic ring size. Indeed, the size of the exocyclic silacycloalkyl ring at the 1,1′-position affected the maximum peaks in the absorption and emission spectra, with systematic blue shifts being observed with increasing exocyclic ring size. A sequential elevation of the LUMO levels was monitored by observing increases in the reduction potential, as seen in the cyclic voltammograms (CVs), with increasing exocyclic ring size. In addition, due to the formation of exocyclic rings, an enhanced thermal stability was observed based on DSC measurements, showing that silacyclopentylsilole exhibits the highest Tg value in the series.

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