TITLE:
A New Heptamethine Cyanine-Based Near-Infrared Fluorescent Probe for Divalent Copper Ions with High Selectivity
AUTHORS:
Zhixiang Han, Qingqing Yang, Lihui Liang, Xiaobing Zhang
KEYWORDS:
Near-Infrared Dye; Fluorescent Probe; Cu2+ Ions
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.3 No.8,
December
19,
2013
ABSTRACT: A new near-infrared fluorophore 2-(2-Aminoethyl) pyridine-tricarbocyanine (1) was rationally designed and synthe-sized as a
fluorescent probe for detection of Cu2+ with high selectivity. The
response of Probe 1 is based on the
fluorescence quenching upon
binding to Cu2+. The sensing performance of the proposed Cu2+-sensitive
Probe 1 was then investigated. The
probe can be applied to the quantification detection of Cu2+ with a
linear concentration range covering from 4.8 × 10-7 to 1.6 × 10-4 mol/L and a detection limit of 9.3 × 10-8 mol/L. The experimental results showed that the response of 1 to Cu2+ was independent of pH in medium condition (pH 6.0-8.0),
and exhibited excellent selectivity towards Cu2+ over other common
metal cations.