Regulating Energy Transfer Pathways to Construct Multicolor Luminescent Lanthanide Metal–Organic Frameworks and Their Multiorder Anticounterfeiting Barcodes and Antibiotic Sensing

We present the development of “all-in-one”
layered
Ln-MOFs (Ln-OXAL and Ln-GLYC; Ln = Tb, Eu)
with efficient multicolor emission, multiple anticounterfeiting, and
smart photoresponsive antibiotic properties. By controlling the energy
transfer pathways, a series of multicolor emissions from chartreuse
to red light were successfully achieved in Ln-MOFs. Furthermore, the
typical fingerprint emission spectrum of Ln-MOFs with multicolor emission
characteristics was utilized and further integrated into a high-capacity
photonic barcode encoding library, and by employing an effective encoding
strategy, a multilayered anticounterfeiting material with advanced
information encryption capabilities was developed. Both Tb-OXAL and Tb-GLYC exhibit highly sensitive optical sensing
abilities for detecting low concentrations of oxytetracycline, achieving
limit of detection values as low as 1.35 and 7.44 μM, respectively.
The integration of various applications in a specific material remains
considerably challenging, primarily due to the inherent complexities
in coordinating and ensuring compatibility among these varied properties.