The photophysical properties and imaging application of a new polarity-sensitive fluorescent probe

Abstract

A new excited-state intramolecular proton transfer (ESIPT) based and polarity-sensitive fluorescent probe M-HA was easily developed by conjugated connection of indole and 2'-hydroxyacetophenone through (E)-2-chloro-3-(hydroxymethylene)cyclohex-1-enecarbaldehyde. M-HA shows near-infrared fluorescence, high...

Electrochemical Regioselective Cross-Dehydrogenative Coupling of Indoles with Xanthenes

“…A large number of the indoles-contained compounds and their motifs are frequently found in many natural products . Additionally, the indole derivatives have also attracted much attention in some other fields, such as fluorescent dyes, fluorescent probe, and so on . For the multifaceted importance, considerable efforts have been focused on the functionalization of indole skeleton in past years, thus providing versatile strategies for the indole derivatization .…”

Theoretical insights into the central “acceptor” bridge function on the whole visible light and near-infrared emission in tetraphenylpyrazine-based luminogens

“…DTPP-NZ and DTPP-B2Z are designed to be red and near-infrared emitters with moderate F f , but the theoretical values (649 nm, 39.5% and 795 nm, 16.7%) are not inferior to the previously reported excellent deep-red and near-infrared fluorophores in solution (650-750 nm, 30.0-64.9% and 756-790 nm, 3.4-18.7%). 8,24,45,46 It is anticipated that the steric congestion induced by the twisted structures of the TPP units could impede the deleterious intermolecular p-p interaction during molecular aggregation, which would greatly reduce the emissionquenching probability in the solid form. Our study provides a predictive strategy for the rational design of the heterocycle-based luminogens with whole visible light and near-infrared emission.…”

Organic Near‐Infrared Luminescent Materials Based on Excited State Intramolecular Proton Transfer Process†

“…reported an ESIPT‐based polarity‐sensitive probe M‐HA (compound 31 ). [ 100 ] The structure is shown in Figure 10b. The fluorescence spectra of M‐HA in different polar solvents are shown in Figure 10d.…”