Nanowerk September 26, 2023
Researchers in China proposed a novel strategy for constructing highly sensitive TFMs with tunable emission (450–650 nm) toward multilevel information encryption which employs polarity-sensitive fluorophores with donor–acceptor–donor (D–A–D) type structures as emitters and long-chain alkanes as thermosensitive loading matrixes. The structure–function relationships between the performance of TFMs and the structures of both fluorescent emitters and phase-change molecules were systematically studied. The TFMs exhibited over 9500-fold fluorescence enhancement toward the temperature change, as well as ultrahigh relative temperature sensitivity up to 80% K−1, which were confirmed. The TFMs could be further developed as information-storage platforms within a relatively narrow interval of temperature variation, including temperature-dominated multicolored information display and multilevel information encryption. According to the researchers their work provides a different perspective for designing TFMs for information encryption and bring new design for other response-switching-type fluorescent probes with ultrahigh conversion efficiency… read more. TECHNICAL ARTICLEÂ