Architecture of multi-channel and easy-to-make sensors for selective and sensitive Hg2+ ion recognition through Hg-C and Hg-N bonds of naphthoquinone-aniline/pyrene union

Mermer Z., Yavuz Ö., Atasen S. K. , Alçay Y., Yılmaz İ.

JOURNAL OF HAZARDOUS MATERIALS, vol.410, 2021 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 410
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jhazmat.2020.124597
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Computer & Applied Sciences, EMBASE, Environment Index, Food Science & Technology Abstracts, Geobase, INSPEC, MEDLINE, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Mercury, Sensor, Naphthoquinone, Colorimetric, Fluorometric, Voltammetric


The aim of this work is, for the first time, to develop new inexpensive, easy-to-make and multi?channel receptors, naphthoquinone-aniline/pyrene union ((Nq?An) and (Nq?Pyr)) and their Hg2+ complexes [Hg?(Nq?An)2] and [Hg?(Nq?Pyr)2] to supply an efficient solution to critical deficiencies to be encountered for Hg2+ recognition. This study is based on colorimetric, fluorometric, and voltammetric methods for determination of Hg2+ ions through Hg-C and Hg-N binding mode of the naphthoquinone-aniline/pyrene union in aqueous media. The binding mode of the receptors with Hg2+ cation was confirmed by usual characterization techniques for the synthesized Hg2+-complexes [Hg?(Nq?An)2] / [Hg?(Nq?Pyr)2] and voltammetric, 1H NMR titration experiments as well as Job?s method, indicating a 2:1 complex between the receptors and Hg2+ cation. The receptors showed a considerable color switching from orange to pink along with a red-shift of absorption wavelength, and fluorescence enhancement via the Chelation Enhanced Fluorescence effect (CHEF), and distinctive changes on the voltammogram of the electroactive naphthoquinone unit with Hg2+ cation. The experiments indicate that the sensors are highly selective and sensitive toward Hg2+ among the studied metal ions in aqueous media compared with other reported Hg2+ sensors.