鈥淥n鈥搊ff鈥搊n鈥?Switchable Sensor: A Fluorescent Spiropyran Responds to Extreme pH Conditions and Its Bioimaging Applications
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- 作者：Shulin Wan ; Yang Zheng ; Jie Shen ; Wantai Yang ; Meizhen Yin
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2014
- 出版时间：November 26, 2014
- 年：2014
- 卷：6
- 期：22
- 页码：19515-19519
- 全文大小：342K
- ISSN：1944-8252
文摘
A novel spiropyran that responds to both extreme acid and extreme alkali and has an 鈥渙n鈥搊ff鈥搊n鈥?switch is reported. Benzoic acid at the indole N-position and carboxyl group at the indole 6-position contribute to the extreme acid response. The ionizations of carboxyl and phenolic hydroxyl groups cause the extreme alkali response. Moreover, the fluorescent imaging in bacterial cells under extreme pH conditions supports the mechanism of pH response.