Construction, Characterization, and Properties of Poly(iminofuran-spiro-oxindole)s through Catalyst-Free Multicomponent Spiropolymerization of Diisocyanides, Activated Alkynes, and Bis-isatins

The design of multi-functional ionic hydrogels with anti-freezing, temperature response and luminescence properties

“…This phenomenon is typically attributed to the coordination of Fe 3+ with a carbonyl group, which disrupts inter-group clusters and thus quenches the fluorescence. 32,33 The pronounced fluorescence quenching has facilitated information storage. Quick response (QR) codes were printed on the hydrogel by contact with Fe 3+ containing filter papers, enabling scanning with a smartphone linked to the corresponding test (Fig.…”