Phenazine‐Based Ratiometric Hg²⁺ Probes with Well‐Resolved Dual Emissions: A New Sensing Mechanism by Vibration‐Induced Emission (VIE)

Abstract

Phenazines exhibit intriguing vibration-induced emission (VIE) owing to the fast intrinsic vibration of benzo[a,c]phenazine moiety. For the first time, a phenazine-based ratiometric fluorescent probe DBPST is developed for recognizing Hg via restriction of VIE. Upon binding with Hg , DBPST demonstrates two well-resolved emission peaks (over 130 nm) with a wide tuning color and affords a large signal-to-background ratio.

Diversified Excited‐State Relaxation Pathways of Donor–Linker–Acceptor Dyads Controlled by a Bent‐to‐Planar Motion of the Donor

“…The intermediate compounds 1 and 2 were prepared according to previously reported literature. [12] All compounds were fully characterized by 1 H NMR, 13 C NMR and high-resolution mass spectroscopy (HRMS). The HOMO and LUMO energy levels ( Figure 1 c and Table 1) were determined according to the equation E HOMO or E LUMO = À(E onset + 4.4) in eV on the cyclic voltammograms curves, in which E onset is the onset potential of the first oxidation or reduction wave ( Figure S1).…”

Fluorescent glycoconjugates and their applications

“…The fluorescence emission of these VIEgens can reversibly shift between the blue and red region when the microenvironment they exist, such as temperature, polarity and viscosity, is changed. [28][29][30][31][32][33][34][35][36][37] The present review will be divided according to the different fluorophores to which carbohydrates are conjugated, producing structurally and functionally diverse fluorescent glycoclusters. Representative examples of polymeric backbones used for building multivalent fluorescent glycoconjugates are also summarized.…”

Diversified Excited‐State Relaxation Pathways of Donor–Linker–Acceptor Dyads Controlled by a Bent‐to‐Planar Motion of the Donor

“…Details of the synthetic routes are elaborated in Schemes S1 and S2 of the Supporting Information (SI). The intermediate compounds 1 and 2 were prepared according to previously reported literature . All compounds were fully characterized by 1 H NMR, 13 C NMR and high‐resolution mass spectroscopy (HRMS).…”