In this article, we tried to redefine the unexplored potential of a benzothiazole type of Schiff-base (OM), which was identified as an AIE-active molecule that exhibits excited-state intramolecular proton transfer (ESIPT). Interestingly, this compound shows ultra-sensitivity and selectivity in the detection of Al(iii) (12 pM; 456 ppt). The OM was capable of pH sensing and was also tested for internalization in cancerous cells for intracellular imaging. Computational modeling was performed and the results were in good agreement with the experimental UV-Vis spectrum and the energy gap obtained in basic and acidic media.

Two phosphorescent complexes, [Ir(o-CHOppy)(PPh 3 ) 2 (H)Cl)] (1) and [Ir(ppy)(PPh 3 ) 2 (H)Cl)] (2) exhibiting 'aggregation induced phosphorescent emission (AIPE)' property have been found to be very sensitive for the detection of picric acid (PA). The detection limit has been checked for PA and found the 15 values of 264 nM and 65 nM with the complexes 1 and 2, respectively. Quenching (ACQ)' effect in the solid state creates difficulty in 55 applying Ir(III) complexes in explosive detection. The main cause of very poor sensitivity and inefficiency of fluorophores in sensoric applications was resulted from the notorious ACQ effect 12 . There has a common strategy to minimize ACQ effect in emissive molecules is to integrate the bulky substituents with the 60 fluorophores that will prevent the molecules to be closer in solid Complex 1 1 H NMR (400 MHz, CDCl 3 ) δ 9.15 (d, J = 5.5 Hz, 1H), 8.97 (s, 1H), 7.56 (d, J = 8.0 Hz, 1H), 7.49 -7.30 (m, 15H), 7.15 (m, 18H), 6.81 (t, J = 6.0 Hz, 1H), 6.47 (s, 1H). δ -16.76 (t, ESI-HRMS calculated: ([M-Cl] + ): m/z, 900.2136, found: ([M-Cl] + ): m/z, 900.3271, yellow solid; Yield, 68.00 %. Fabrication of thin-film on substrate for PL measurement 85 A 10 -3 M solution of each of both complexes (in DCM) was

A simple and efficient pyrene based luminescent multifunctional probe was utilized in selective and sensitive ratiometric detection of H+, Al3+ and picric acid.