fig2

Figure 2. (A) Proposed mechanism; (B) ¹H-NMR spectra analysis of compound 4, TPE-M with Hg²⁺ and TPE-M (DMSO-d₆ as a deuterated reagent); (C) Fluorescence spectrum of TPE-M on incremental addition of Hg²⁺; (D) Fluorescence spectrum of probe TPE-M^[32]. Copyright 2019, Royal Society of Chemistry. NMR: Nuclear magnetic resonance; TPE: Tetraphenylethene.