Fig. 2: Polydiacetylene (PDA)-based colorimetric sensor functionalized with galloyl groups for Pb²⁺ ion detection. | Communications Chemistry

Fig. 2: Polydiacetylene (PDA)-based colorimetric sensor functionalized with galloyl groups for Pb²⁺ ion detection.

From: Surface functionalization strategies for polydiacetylene-based colorimetric sensors

Fig. 2

a Structure of diacetylene vesicles functionalized with galloyl groups, which assemble to form galloyl-PDA vesicles. b Dual-signal detection of Pb2+ by blue galloyl-PDA vesicles polymerized upon 254 nm UV irradiation. c Detection mechanism of Pb2+ by galloyl-PDA vesicles, where Pb2+ interacts with galloyl-PDA vesicles, triggering conformational distortion of the PDA backbone. Adapted with permission from ref. 82, copyright (Elsevier B.V., 2022).

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