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Highly selective ratiometric fluorescent probe for Au3+ and its application to bioimaging
- Highly selective ratiometric fluorescent probe for Au3+ and its application to bioimaging
- Young Choi J.; Kim G.-H.; Guo Z.; Yeon Lee H.; Swamy K.M.K.; Pai J.; Shin S.; Shin I.; Yoon J.
- Ewha Authors
- 윤주영; K.M.K.Swamy
- SCOPUS Author ID
- Issue Date
- Journal Title
- Biosensors and Bioelectronics
- vol. 49, pp. 438 - 441
- SCI; SCIE; SCOPUS
- The 4-propargylamino-1,8-naphthalimide based fluorescent probe 1 has been explored as a sensor for selective detection of Au3+. 4-Amino-1,8-naphthalimides, that possess typical intramolecular charge transfer (ICT) electronic characteristics, have been widely used as versatile platforms for fluorescent probes. The newly designed probe 1 contains a propargylamine moiety at C-4 of the naphthalimide chromophore that reacts with Au3+ to generate a product that has distinctly different electronic properties from 1. Specifically, the probe undergoes a remarkable change in its absorption spectrum upon addition of Au3+ that is associated with a distinct color change from yellow to light pink. In addition, a blue shift of ca. 56nm also takes place in the emission spectra of the probe. Consequently, 1 serves as a reaction-based sensor or so called chemodosimeter for Au3+. Importantly, surfactants enhance the rate of reaction of 1 with Au3+, thus, enhancing its use as a real time sensor. Finally, the results of studies probing its application to bioimaging of Au3+ in live cells show that the probe 1 has a unique ability to sense Au3+ in cells and, in particular, in lipid droplets within cells. © 2013 The Authors.
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