Light- and Redox-Controlled Fluorescent Switch Based on a Perylenediimide鈥揇ithienylethene Dyad
详细信息 查看全文
- 作者：Rafael S. S谩nchez ; Roser Gras-Charles ; Jos茅 Luis Bourdelande ; Gonzalo Guirado ; Jordi Hernando
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：March 29, 2012
- 年：2012
- 卷：116
- 期：12
- 页码：7164-7172
- 全文大小：416K
- 年卷期：v.116,no.12(March 29, 2012)
- ISSN：1932-7455
文摘
The development of luminescent materials that are sensitive to both optical and electrical stimuli is of high interest for the fabrication of future information-processing devices. In this study we report about a novel fluorescent molecular switch (1) that can be light- and redox-controlled. This compound has been synthesized by covalent tethering of a perylenediimide fluorophore (PDI) to a dithienylethene (DTE) unit. The photochromic properties of the DTE group are preserved in the dyad, which can be reversibly converted between open (1o) and closed (1c) states upon irradiation. In addition, 1 displays electrochromicity, and its ring-opening process can be promoted quantitatively by electrochemical oxidation. Whereas the open-ring state of the switch is highly fluorescent, the emission of the PDI group in 1c is quenched by energy transfer to the DTE group. This allows large fluorescence modulation between the two states of 1, which can be operated either as an all-optical switch or by a combination of photo- and electrochemical stimuli.