Journal
DYES AND PIGMENTS
Volume 112, Issue -, Pages 236-238Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2014.07.013
Keywords
Fluorescence; Ferrocene; Sensor; Gold; Naphthalimide; Alkynophilicity
Funding
- National Nanotechnology Center (NANOTEC), NSTDA, Ministry of Science and Technology, Thailand through its program of Center of Excellence Network
- Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission [AM1006A-56]
- Ratchadaphisek Somphot Endowment Fund of Chulalongkorn University [RES560530126-AM]
- Thai Government Stimulus Package 2 [TKK2555, SP2]
- Chulalongkorn University
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Two new compounds containing a ferrocene unit and a strongly fluorescent naphthalimide moiety were designed and successfully synthesized. The incorporation of a hydrophilic triethylene glycol unit can enhance the water-solubility and facilitate the dispersion of compounds in aqueous media. The presence of the ferrocene unit in both compounds results in molecules with low quantum efficiencies due to the photo-induced electron transfer (PET) from naphthalimide to ferrocene. However, one of these compounds exhibits a selective fluorescent turn-on by the addition of Au(III) ion with low to negligible interference by 100-fold concentration of other metal ions in acetonitrile/water. Under optimum conditions, the detection limit for Au(III) ion was 95 ppb. (C) 2014 Elsevier Ltd. All rights reserved.
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