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FITC and Ru(phen)32+ co-doped silica particles as visualized ratiometric pH indicator

Xu, Jianquan and Sun, Lei and Li, Jun and Liang, Jinglun and Zhang, Huimao and Yang, Wensheng (2011) FITC and Ru(phen)32+ co-doped silica particles as visualized ratiometric pH indicator. NANOSCALE RESEARCH LETTERS, 6 (1). pp. 1-7. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.nanoscalereslett.com/content/6/1/561

Abstract

The performance of fluorescein isothiocyanate (FITC) and tris(1, 10-phenanathroline) ruthenium ion (Ru(phen)32+) co-doped silica particles as pH indicator was evaluated. The emission intensity ratios of the pH sensitive dye (FITC) and the reference dye (Ru(phen)32+) in the particles were dependent on pH of the environment. The changes in emission intensity ratios of the two dyes under different pH could be measured under single excitation wavelength and readily visualized by naked eye under a 365-nm UV lamp. In particular, such FITC and Ru(phen)32+ co-doped silica particles were identified to show high sensitivity to pH around the pKa of FITC (6.4), making them be potential useful as visualized pH indicator for detection of intracellular pH micro-circumstance.

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:11603
Deposited By:M T V
Deposited On:05 Jan 2012 09:47
Last Modified:05 Jan 2012 09:47

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