Chromogenic and fluorogenic Schiff base chemosensor for nano scale level fluoride detection with logical interpretation

- Schiff-base Organic Frameworks (SOFs) has been synthesized as selective F− chemosensor.
- UV-Vis titration of the chemosensor with F− is reversible with Al3+.
- Emission intensity has been enhanced with two eqv. F− and limit of detection is 10 nM.
- Restricted CN isomerization, TICT and PTTS process.
- AND-NOT-NAND-XNOR-XOR-NOR-OR based circuit development for Lab-on a-Molecule.

Schiff base Organic Frameworks (SOFs) based chemosensor have been synthesized and utilized for recognization of biologically relevant fluoride anion. The chemosensor is selective for fluoride (F−) and exhibits reversible UV-Vis response with alternate addition of aluminum (Al3+). Interestingly a fluorescence 'turn on' response has been noticed with concomitant addition of fluoride. TICT, PTTS and restricted CN isomerization has been taken into account in order to explain the florescence 'turn on' phenomenon. Significantly, the limit of fluoride detection is nano molar level (∼10 nM). The reversible UV-Vis phenomena have been used for designing AND-NAND-NOT-NOR-OR-XOR-XNOR based complex logic circuit to prepare potential feedstock as 'Lab-on a-Molecule'.

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