Abstract
Three anthracene derivatives (1a, 1b and 1c) containing a Schiff base moiety were synthesized and investigated as chemosensors for the detection of Cu2+. 1a displayed extremely high selectivity to Cu2+ over other 12 interference ions with 120-fold fluorescence enhancement at 468 nm in the acetonitrile media. The nitrogen atom in Schiff base and sulfur atom of 1a provided a binding scaffold for recognition of Cu2+ with high affinity (Ka = 4.35 × 104M-1). The formation of 1a-Cu2+ complex caused a decrease of electron density on nitrogen atom and sequentially led to fluorescence enhancement based on the photoinduced electron transfer (PET) mechanism. The design used for these three molecules afforded a new model for construction of fluorescence sensors based on PET mechanism.
Original language | English (US) |
---|---|
Pages (from-to) | 181-185 |
Number of pages | 5 |
Journal | Sensors and Actuators, B: Chemical |
Volume | 176 |
DOIs | |
State | Published - 2013 |
Keywords
- Anthracene
- Fluorescence sensor
- PET
- Schiff-base
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry