A novel coumarin-derived acylhydrazone Schiff base gelator for synthesis of organogels and identification of Fe3+

Fluorescent Schiff base sensors as a versatile tool for metal ion detection: strategies, mechanistic insights, and applications

“…3.1.6 Fe 2+ /Fe 3+ sensor [222][223][224] . Iron is one of the essential elements and it plays a very significant role in living systems such as in oxygen uptake, oxygen metabolism, the electron transfer process, and as a cofactor in various enzymatic reactions.…”

A Highly Sensitive and Selective Fluorescein-Based Cu2+ Probe and Its Bioimaging in Cell

“…To date, many colorimetric fluorescent probes consisted of large π-conjugated system such as fluorescein ( 36 ), rhodamine ( 37 ), coumarin ( 38 , 39 ), anthracene ( 40 ), and BODIPY ( 41 , 42 ) with obvious spectra absorption or strong fluorescence have been successfully synthesized ( 43 ). Among those probes, the fluorescein family dyes have excellent spectroscopic properties, such as long absorption and emission wavelengths, high extinction coefficients, high quantum yields, and excellent photostability, which are always introduced to construct optical sensors for metal ions ( 44 ).…”

Novel Fluorescent Probe toward Fe3+ Based on Rhodamine 6G Derivatives and Its Bioimaging in Adult Mice, Caenorhabditis elegans, and Plant Tissues

“…However, their disadvantages including low specificity, complicated sample preparation, and expensive instruments hindered their wide applications. − Recently, increasingly more attention has been paid to the fluorescence method for the detection of Fe 3+ because of its ability to detect Fe 3+ rapidly, sensitively, and selectively. And it could not cause any damage to cell. − To date, many fluorescent probes for Fe 3+ have been synthesized successfully, which included coumarin, , anthracene, BODIPY, , cyanine, and rhodamines . Among these probes, rhodamine 6G has many advantages over other derivatives, including high extinction coefficients, high quantum yields, excellent photostability, and emission wavelengths. − However, most rhodamine derivatives were obtained through CN, but a few compounds linked by amide have been reported. − It was clear that the amide-modified rhodamine 6G derivatives have more potential coordination sites to bind metal ions than CN .…”

“…And it could not cause any damage to cell. 14−18 To date, many fluorescent probes for Fe 3+ have been synthesized successfully, which included coumarin, 19,20 anthracene, 21 BODIPY, 22,23 cyanine, 24 and rhodamines. 25 Among these probes, rhodamine 6G has many advantages over other derivatives, including high extinction coefficients, high quantum yields, excellent photostability, and emission wavelengths.…”