Synthesis and functional properties of new optical pH sensor based on benzo[de]anthracen-7-one immobilized on the viscose

Novel dye for detection of callus embryo by confocal laser scanning fluorescence microscopy

“…The initial compound 3‐ N ‐(2‐chloroacetamido)benzanthrone was prepared from 3‐aminobenzanthrone according to the literature procedure . To the solution of 0.5 mmol 3‐ N ‐(2‐chloroacetamido)benzanthrone in 50 mL of 1,4‐dioxane, pyrrolidine (0.05 mL) was added under stirring.…”

Synthesis, photophysical and antimicrobial activity of new water soluble ammonium quaternary benzanthrone in solution and in polylactide film

“…Their excellent color characteristics conditioned by the emitted fluorescence and high photo stability make them preferable for surface or structural coloration of polymers [1,2]. Recent studies have shown that 3-oxy-and 3-aminosubstituted benzanthrone derivatives can be used in some non-traditional applications as components in liquid-crystalline systems for electro-optical displays [3][4][5][6][7] or as sensors for biological important metal ions and amines [8][9][10][11]. The amidinobenzanthrone derivatives have showed potential as biomedical probes for proteins, lipids, and cells.…”

Fluorescence based fibre optic pH sensor for the pH 10–13 range suitable for corrosion monitoring in concrete structures

“…The protonation/deprotonation of the nitrogen on the imidazolyl groups allows for the determination of pH in the alkaline region of the pH scale. The fluorescence detection method was employed rather than the simpler commonly used method based on colorimetric measurements as fluorescent sensors are usually more precise, having less interference from the light source, and offer higher sensitivity than their colorimetric counterparts [23,24]. Significantly, attention in the development process was also paid to the mechanical design of the sensor to ensure safe embedment in harsh and corrosive environments.…”

“…[8,18,[32][33][34], trinitrobenzensulfonic acid [14], thymol blue [20,21,35,36], cresol red [20], phenolphthalein [19], aniline blue [37], rhodamine 19 [38], Victoria blue [39] etc. as well as reported in the literature such as fluorescent Schiff bases [40], porpholactones [41] or a benzo [de]anthracen-7-one derivative [23] , that are known to be useful for the spectroscopic determination of high pHs, the majority of them are absorptive dyes rather than fluorescent dyes and only a few meet the requirements of being stable for a long period of time in highly alkaline media, possessing a pK a in the range between 11-12.5, having reasonable fluorescence quantum yield and good photostability, being fully compatible with LED light sources and bearing one or more functional chemical groups suitable for covalent immobilization of the indicator. It was therefore decided to synthesize the sensitive dye needed for the application considered rather than to use an "off-the-shelf" indicator.…”