N. Narayanan and G. Patonay, “A New Method for the Synthesis of Heptamethine Cyanine Dyes: Synthesis of New Near-Infrared Fluorescent Labels,” The Journal of Organic Chemistry, Vol. 60, No. 8, 1995, pp. 2391-2395. http://dx.doi.org/10.1021/jo00113a018

has been cited by the following article:

• 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.