A red fluorescence ‘off–on’ molecular switch for selective detection of Al3+, Fe3+ and Cr3+: experimental and theoretical studies along with living cell imaging

Abstract

A spirobenzopyran-quinoline (SBPQ) based sensor was synthesized which selectively detects trivalent ions viz. Al(3+), Fe(3+) and Cr(3+) through a fluorescence turn on signal in the red region (~675 nm) with the detection limit in the order of 10(-8) M. The potentiality of the probe was confirmed by employing it for fluorescence bio-imaging with Al(3+) in three different types of live-cells.

Two Schiff-base fluorescent sensors for selective sensing of aluminum (III): Experimental and computational studies

“…In the past few years, fluorescent probes have currently attracted significant interest because of its high sensitivity, selectivity, rapidity and easy operational procedure, therefore, the design and synthesis of fluorescent chemosensors remains an important endeavor in chemistry [8][9][10][11][12][13][14][15][16][17][18][19].…”

A TBET based BODIPY-rhodamine dyad for the ratiometric detection of trivalent metal ions and its application in live cell imaging

“…Even though several fluorescent probes are available for the detection of divalent or trivalent ions, probes useful for the collective detection of trivalent metal ions are very few in number. In the last couple of years, few reports based on 4 the chemosensors for trivalent metal ion detection are published in various international journals [29][30][31][32][33][34]. Most of these fluorescent probes operate based on metal ion induced fluorescence 'turn-on' or 'turn-off' mechanisms.…”

A Triphenyl Amine‐Based Solvatofluorochromic Dye for the Selective and Ratiometric Sensing of OCl− in Human Blood Cells

“…Therefore, there is a critical demand to develop probes that can easily be synthesized, provide a ratiometric response, and have long excitation and emission wavelengths to facilitate in-vivo imaging. [11] In continuation of our work on developing new probe materials [12] we herein report the synthesis as well as photophysical and sensing properties of a Schiff base based on triphenylamine bearing a diaminomaleononitrile moiety. The structure of the probe was supported by single-crystal X-ray study.…”