Dual-emission samarium macrocycle as a lab-on-a-molecule enables high-throughput discrimination of anionic sulfonate surfactants

Using a dual-emission Sm(iii)-macrocycle as the perceptive lab-on-a-molecule chemosensor toward selective and discriminative detection of nitroaromatic explosives

“…1c and Tables S1–S4, ESI†). It was found that it had similar structural details to the reported analogues, 38–41 i.e. , a ‘lasso-type’ macrocycle H 2 L2 l , two axial NO 3 − and one ten-coordinated Sm( iii ) center, whose coordination geometry was still proven as the distorted bicapped square antiprism.…”

“…Following the previously reported synthetic route, 38 the targeted dialdehyde H 2 Q l and Sm( iii )-macrocycle Sm-2 l were successfully prepared from the original 2-(2-bromophenyl)ethylamine (0.500 g, 2.50 mmol). H 2 Q l , 1.037 g (yield 77%).…”

“…The reversible nature of their imine bonds (CN) thus offers us the opportunity to develop perceptive chemosensors for more target analytes. More importantly, in our previous works, 38–41 it has also been proven that they can produce abundant sensing differentiations during multi-stimuli responses. Simultaneously, compared to single-channel signals, dual- or multiple-channel ones can provide an internal reference, and thus possibly produce richer and more accurate information for the selective and discriminative detection of analogues with high sensitivity and universality.…”

Highly selective and discriminative detection of small alcohols based on a dual-emission macrocyclic samarium complex

“…Based on the above work, possible sensing mechanisms are discussed. Through relative experiments and previous studies, 37,38,40–43 it was concluded that there were two main sensing mechanisms. The first sensing mechanism was based on Sm-2 r dynamic imine bonds.…”

“…The dynamic imine bond (C]N) of the Schiff base can respond to external stimuli, such as pH, temperature, and solvent. [40][41][42][43] Organic ligands with molecular rotor properties can respond to viscosity changes in external environments. 39 Compared with single-channel probes, multi-channel probes have abundant changes to external stimuli.…”