Jump to main content
Jump to site search

Issue 2, 2018
Previous Article Next Article

Colorimetric and fluorescent sensing of a new FRET system via [5]helicene and rhodamine 6G for Hg2+ detection

Author affiliations

Abstract

A “visually colorimetric” and fluorometric sensor based on [5]helicene connected to rhodamine 6G via a hydrazide moiety, RG5H, was designed and prepared for the highly sensitive and selective detection of Hg2+. The sensor system operated through the FRET process from the [5]helicene energy donor to the ring-opened rhodamine 6G–Hg2+ complex acceptor. The sensor illustrated a very large Stokes shift up to 176 nm. In aqueous acetonitrile solutions, RG5H exhibited high selectivity and sensitivity toward Hg2+ in the presence of various competitive metal ions, such as Cu2+, Ag+, Zn2+, Pb2+, Ca2+, Cd2+, Co2+, Fe2+, Mg2+, Mn2+, Ba2+, Ni2+, Na+, Li+ and K+. The detection limit of RG5H for determination of Hg2+ was found to be 2.3 ppb. The binding of RG5H to Hg2+ was evident in both fluorescence enhancement as well as a colorimetric change in the sensor from greenish-yellow to orange, which could be easily observed by the naked eye.

Graphical abstract: Colorimetric and fluorescent sensing of a new FRET system via [5]helicene and rhodamine 6G for Hg2+ detection

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Oct 2017, accepted on 20 Dec 2017 and first published on 04 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ04129B
Citation: New J. Chem., 2018,42, 1396-1402
  •   Request permissions

    Colorimetric and fluorescent sensing of a new FRET system via [5]helicene and rhodamine 6G for Hg2+ detection

    A. Petdum, W. Panchan, J. Sirirak, V. Promarak, T. Sooksimuang and N. Wanichacheva, New J. Chem., 2018, 42, 1396
    DOI: 10.1039/C7NJ04129B

Search articles by author

Spotlight

Advertisements