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.
Subject(s)
Aluminum/analysis , Cations/analysis , Chromium/analysis , Ferric Compounds/analysis , Benzopyrans/chemistry , Fluorescent Dyes , Quinolines/chemistry , Spectrometry, Fluorescence , Spectrophotometry, Ultraviolet , Spiro Compounds/chemistryABSTRACT
For ratiometric "naked eye" detection of CN(-), an ESIPT exhibiting benzothiazole receptor (BHI) is designed having one aldehyde group ortho and the other aldehyde para to the OH group respectively. Due to RAHBs, the ortho aldehyde group is highly reactive undergoing nucleophilic cyanide addition selectively, which hampered ESIPT. This is also supported by DFT and TD-DFT calculations.