Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 2,4,6-Triphenylthiopyrylium functionalized with an aza-oxa-thia macrocycle is able to selectively recognize Hg 2+ cation by a color change and Cu 2+ cation by a remarkable significant emission enhancement. ... 2,4,6-Triphenylthiopyrylium functionalized with an aza-oxa-thia macrocycle is able to ...