Phenothiazine‐Tethered Biaryls as Fluorescent Probes for Multi‐Analyte Detection

Abstract

The one‐pot three‐component domino reaction of 2‐acetylphenothiazine, 4‐Cl/4‐Me benzaldehyde and malononitrile afforded 3‐amino‐4′‐chloro/4′‐methyl‐5‐(10H‐phenothiazin‐2‐yl)‐[1,1′‐biphenyl]‐2,4‐dicarbonitriles in good yields. These phenothiazine‐tethered biaryls exhibited strong red fluorescence under UV lamp in solid state and green fluorescence in DMSO. These probes were sensitive towards multi‐analytes like Fe3+, Cu2+, picric acid and 4‐nitrophenol with good lower limit of detection.

Dual responsive pyridoxal-AHMT based fluorescent sensor towards zinc(ii) and mercury(ii) ions and its bioimaging application

“…S23, ESI †), and is found to be 1.0845 AE 0.0371 Â 10 5 M À1 . 53 The Job plot was used to calculate the binding stoichiometry of L towards Zn 2+ and Hg 2+ . The mole fraction variations of the probe (L) with Zn 2+ and Hg 2+ ions were intersected at X M = 0.32 and X M = 0.50, respectively.…”

Recent advances on phenothiazine-based oxime esters as visible light photoinitiators of polymerization

“…[119] Similarly to carbazole, phenothiazine is also an excellent electron-donating group and this group was extensively used for the design of chromophore for solar cells, [120][121][122][123][124][125][126][127], light-emitting materials for electroluminescent devices, [128][129][130][131][132] semiconductors for organic field effect transistors (OFETs) [133][134][135][136][137][138] or fluorescent probes. [139][140][141][142] Based on these strong knowledges concerning phenothiazine chemistry, a wide range of phenothiazine-based oxime esters were designed and synthesized starting from 2017. [143] Phenothiazine is also easy to oxidize, in a potential window adapted for different additives commonly used in photocurable resins so that multicomponent photoinitiating systems can be designed with phenothiazine-based photoinitiators.…”