作者:Yong-Chul Jeong、Dae Gyu Park、In Su Lee、Sung Ik Yang、Kwang-Hyun Ahn
DOI:10.1039/b814040e
日期:——
A series of diarylethenes and their disulfonyl derivatives such as 1,2-bis(2-heptyl-1-benzothiophene-3-yl)perfluorocyclopentene (HBTF6), 1,2-bis(6-acetyl-2-heptyl-1-benzothiophene-3-yl)perfluorocyclopentene (DAHBTF6), 1,2-bis(2-heptyl-1-benzothiophene-1,1-dioxide-3-yl)perfluorocyclopentene (HBTFO4), and 1,2-bis(6-acetyl-2-heptyl-1-benzothiophene-1,1-dioxide-3-yl)perfluorocyclopentene (DAHBTFO4), have been prepared for the examination of a substituent and an oxidation effect on photochromic and photophysical properties. Steady state fluorescence studies indicated that the disulfonyl diarylethenes were highly fluorescent only in the closed form. The introduction of acetyl groups at the 6,6′ positions and heptyl groups at the 2,2′ positions in disulfonyl diarylethene gave rise to an increase in the fluorescence quantum yield and fluorescence lifetime. Fatigue properties of oxidized diarylethenes were improved by the introduction of acetyl groups, indicating that the photochromic properties of diarylethene are strongly affected by substituents. We also demonstrated the recording to and erasing of information from the materials by an alternating illumination with UV and visible light, and the accompanying strong fluorescence intensity changes provided a highly efficient information readout system, which may be applicable to erasable optical data-storage elements.
一系列二芳基乙烯及其二磺酰衍生物,如1,2-双(2-庚基-1-苯并噻吩-3-基)全氟环戊烯(HBTF6)、1,2-双(6-乙酰基-2-庚基-1-苯并噻吩) -3-基)全氟环戊烯(DAHBTF6)、1,2-双(2-庚基-1-苯并噻吩-1,1-二氧化-3-基)全氟环戊烯(HBTFO4)和1,2-双(6-乙酰基-制备了 2-庚基-1-苯并噻吩-1,1-二氧化-3-基)全氟环戊烯 (DAHBTFO4),用于检查取代基和氧化对光致变色和光物理性质的影响。稳态荧光研究表明,二磺酰二芳基乙烯仅在闭合形式下才具有强荧光。在二磺酰二芳基乙烯中的6,6'位置引入乙酰基和在2,2'位置引入庚基导致荧光量子产率和荧光寿命增加。乙酰基的引入改善了氧化二芳基乙烯的疲劳性能,这表明二芳基乙烯的光致变色性能受取代基的强烈影响。我们还演示了通过紫外光和可见光的交替照射来记录和擦除材料中的信息,并且伴随的强烈荧光强度变化提供了高效的信息读出系统,该系统可能适用于可擦除光学数据存储元件。