Acetylene substituted fluorenes such as 2-ethynylfluorene and 2,7-diethynylfluorene were synthesized and thin films were prepared by the vacuum deposition. Curing of these fluorene derivatives could be achieved by heat treatment and UV irradiation. The curing temperature of 2-ethynylfluorene and 2,7-diethynylfluorene were found to be 231 and 198 degreesC, respectively. The cured poly(2-ethynylfluorene) and poly(2,7-diethynylfluorene) started to decompose at 280 and 385 degreesC, respectively. Fluorescent characteristics of the cured films were similar to those of monomers, but fluorescent efficiency of the film was decreased about 3 to 10 fold.

아세틸렌기가 치환된 fluorene 유도체 2-ethynylfluorene을 합성하였고 이를 진공 증착하여 박막을 제조하였다. 삼중결합이 치환된 fluorene 유도체들은 자외선 및 열에 의해 경화가 가능하였다. DSC 측정 결과 2-ethynylfluorene은 231 ℃에서 그리고 2,7-diethynylfluorene은 198 ℃에서 경화가 일어나는 것이 관측되었다. 경화된 poly(2-ethynylfluorene) 및 poly(2,7-diethynylfluorene)의 분해는 280 및 385 ℃에서 일어나기 시작하며 T(g)는 관측되지 않았다. 경화된 박막의 광발광 특성은 단량체와 매우 유사하나, 발광 효율은 3에서 10 배정도 감소하였다.

Keywords: Vacuum Deposition Polymerization; Acetylene; Fluorene; UV Curing