Ferrocenyl derivative of 1,8-naphthalimide as a new turn-on fluorescent sensor for Au(III) ion

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 prese...

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Bibliographic Details
Published in:Dyes and pigments 2015-01, Vol.112, p.236-238
Main Authors: Chinapang, Pondchanok, Ruangpornvisuti, Vithaya, Sukwattanasinitt, Mongkol, Rashatasakhon, Paitoon
Format: Article
Language:English
Subjects:
Alkynophilicity
Ferrocene
Fluorescence
Gold
Naphthalimide
Sensor
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Summary: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.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2014.07.013