A Fluorescent Probe for Hg²⁺ Based on Gold(I) Complex with An Aggregation‐Induced Emission Feature

Abstract

A gold(I) complex that exhibited aggregation‐induced emission in acetonitrile‐water mixtures was designed. It showed high selectivity and sensitivity for Hg2+ in acetonitrile‐H2O (1:1, V:V) solution. Dynamic light scattering measurements were conducted to verify that the addition of Hg2+ changed the particle size and induced fluorescence quenching.

Recent Progress on Supramolecular Luminescent Assemblies Based on Aurophilic Interactions in Solution

“…The authors also observed that the size of the nano-aggregates measured by DLS decreased when the water content was increased (8 nm for 60% f w in front of 3 nm for 90% f w ). [34]. The compound was not emissive in pure acetonitrile, but the addition of water to 40% f w produced the appearance of an emission band with λ max at ca.…”

“…As commented previously, complex 36 (Figure 16) presents interesting AIE properties. Due to its efficient emission in the aggregated state, this compound was also explored as a chemosensor for different metal ions [34]. The complex showed a high selectivity towards Hg 2+ in CH 3 CN:H 2 O (1:1, v:v).…”

Aggregation induced emission of gold(i) complexes in water or water mixtures

“…Other changes in the molecular structure, such as the use of negatively charged phosphanes or the increase on the nuclearity of the complexes affect the resulting supramolecular structures. 62 Complexes similar to 61-63 were synthesized with the triphenylphosphine- Complex 29, shown before, aggregates in H2O:acetonitrile mixtures, 35 however displays high selectivity and sensitivity for the presence of Hg 2＋ ions in this solvent mixture.…”

A Novel Ratiometric Fluorescent Probe for Mercury (II) ions and Application in Bio-imaging

“…Compared with these analytical methods, fluorescent techniques have been a promising bio-imaging technique in fields of life sciences, environmental monitoring, and disease diagnosis for their excellent performance targeting metal ions with low cost, good biocompatibility, high sensitivity, selectivity and real-time imaging. Some fluorescent probes have been designed for recognition of Hg 2+ ions in recent years [19,20,21,22,23,24,25], most of which utilize general fluorophores as signal-output groups such as BODIPY, 1,8-napthalimide, cyanine, coumarin, fluorescein, pyrene, anthracene, and rhodamine etc. [26].…”