Publications by authors named "Danielle M John"
Improved selectivity for Pb(II) by sulfur, selenium and tellurium analogues of 1,8-anthraquinone-18-crown-5: synthesis, spectroscopy, X-ray crystallography and computational studies.
Kadarkaraisamy Mariappan Madhubabu Alaparthi Mariah Hoffman Myriam Alcantar Rama Vinothini Balasubramanian Danielle M John
Dalton Trans
July 2015
Article Synopsis
- A series of macrocycles with an anthraquinone unit and cyclic polyheteroether chains were synthesized with sulfur, selenium, and tellurium substitutions for use in fluorescence signaling.
- The new compounds exhibited strong green fluorescence when paired with lead ions (Pb(II)) in acetonitrile, showing better selectivity compared to an oxygen version that also interacted with calcium ions (Ca(II)).
- Studies including UV-Visible, luminescence titrations, and single-crystal X-ray analysis confirmed the formation of 1:1 complexes with Pb(II), while cyclic voltammetry and DFT calculations provided insights into the electrochemical properties and energy levels of the compounds.