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Fluorescent detection of multiple ions by two related chemosensors: structural elucidations and logic gate applications
Ist Teil von
RSC advances, 2017-01, Vol.7 (37), p.23127-23135
Erscheinungsjahr
2017
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
Two related chemosensors L1 and L2 display selective detection of multiple ions (Cu
2+
, Al
3+
, Cd
2+
and S
2−
) as a result of minor variation of functional groups. Both chemosensors offer identical pyrrole-2-carboxamide fragments; however, they differ by the presence of either an ester (L1) or an acid group (L2) at a remote arene ring. While L1 shows selectivity towards the Cu
2+
ion L2 is highly selective for Al
3+
and Cd
2+
cations as well as S
2−
anion. A combination of studies (Stern–Volmer plots, detection limits and Benesi–Hildebrand fittings) displays the notable sensing abilities of both chemosensors. Both chemosensors were utilized to develop logic gate-based applications by considering multiple detection of assorted ions. Structural studies provide vital details about the mode of binding between chemosensors and cations. Simple synthesis, multi-stimuli response, fast response, solution visualization, and practical detection methods (filter paper strips and polystyrene films) suggest excellent sensing potentials of both chemosensors.