In the design of novel fluorescent chemosensors, investigation of new sensing mechanisms between recognition & signal reporting units is of continuing interest. In Recent years, a smart chemosensor probe containing a 1,8-naphthalimide moiety could be developed as a fluorescent & colorimetric sensor for toxic anions, metal ions, biomolecules, nitroaromatics, & acids & be further applied to monitor the relevant biological applications.in this field still several problems & challenges still exist. In this critical review will mainly focused on various sensing mechanism that have emerged in the past few years, such as photo-induced electron transfer (PET), intramolecular charge transfer (ICT), fluorescence resonance energy transfer (FRET), excited-state intramolecular proton transfer (ESIPT), hydrogen bonding & displacement approach. The review concludes with some current & future perspectives including the use of the naphthalimides for sensing anions, metal ions, biomolecules, nitroaromatics & acids & their potential uses in various fields.
Sensing mechanism, Chemical sensor, Naphthalimide, Visual change, Bioimaging
Department of Chemistry, Rajalakshmi Engineering College, Chennai – 602105