A single molecule that acts as a fluorescence sensor for zinc and cadmium and a colorimetric sensor for cobalt

Eun Joo Song, Juhye Kang, Ga Rim You, Gyeong Jin Park, Youngmee Kim, Sung Jin Kim, Cheal Kim, Roger G. Harrison

Research output: Contribution to journalArticlepeer-review

125 Scopus citations

Abstract

A new metal ion sensor that contains quinoline and pyridylaminophenol has been synthesized. In acetonitrile and in the presence of Zn2+, the sensor fluoresces. In contrast, in aqueous solutions the sensor fluoresces in the presence of Cd2+. The fluorescence of the molecule is selective for Zn2+ or Cd2+ and shows no fluorescence with other metal ions. The crystal structure of the Cd2+ complex shows coordination through the amide and phenol oxygens, as well as the amine nitrogen of the sensor. The sensor also acts as a colorimetric sensor for Co 2+ by changing color from colorless to yellow. The color change is selective for Co2+ and is not observed with other metal ions. The unique combination of pyridine and phenol groups with quinoline results in the properties of this sensor.

Original languageEnglish
Pages (from-to)15514-15520
Number of pages7
JournalDalton Transactions
Volume42
Issue number43
DOIs
StatePublished - 21 Nov 2013

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