A fluorescent turn-on probe for cyanide anion detection based on an AIE active cobalt(ii) complex. Academic Article uri icon

Overview

abstract

  • A new tetradentate polypyridine ligand that displays aggregation induced emission (AIE) characteristics has been synthesized. A coordination complex with CoCl2 has been prepared and characterized by X-ray crystallography. The Co(ii) complex retains the AIE activity of the ligand in aqueous solution while also exhibiting a selective turn-on fluorescence response in the presence of cyanide anion. A complex : CN- binding stoichiometry of 1 : 2 was indicated via Job plot analysis and the limit of detection for CN- was determined to be 0.59 μM. The fluorescence response is attributed to coordination of CN- by the AIE active Co(ii) complex, resulting in decreased solubility in aqueous medium and concomitant generation of larger nanoaggregates as revealed by dynamic light scattering (DLS) measurements. The sensitivity and selectivity displayed by this sensor for CN- over other anions renders it a candidate probe for CN- detection in aqueous environments.

publication date

  • February 6, 2018

Identity

Scopus Document Identifier

  • 85041901234

Digital Object Identifier (DOI)

  • 10.1039/c7dt04242f

PubMed ID

  • 29355267

Additional Document Info

volume

  • 47

issue

  • 6