Lanthanide-Containing Heteropolyoxomolybdate as Precursor to Porous Complex Oxides via Polymeric Micelle Assembly and Its Heterostructure with Carbon Dots for Anticounterfeiting Application

作者：Wang, Yun; Yang, Ruirui; Zhao, Yifei; Hong, Liangzhi^*; Ye, Shi^*

来源：Advanced Optical Materials, 2023.

DOI：10.1002/adom.202302485

• complex oxides
• forster resonance energy transfer
• heteropolyoxomolybdate
• ordered porous structure
• soft template

The fabrication of porous complex oxides with intriguing opto-functional properties remains a challenge that requires innovative synthetic strategies. In this work, a facile soft template method is developed based on stable micellar solutions formed with lanthanide-containing heteropolyoxomolybdate and alkaline earth citrates as metal salt precursors and block copolymer as templates. The resulting structures exhibit an effective interfacial Forster resonance energy transfer (IFRET) between the porous CaMoO4:Eu3+ (CEMO) host and the embedded surface-active carbon dots through the conjugated bonds between Ca2+/Mo6+ cations and the CO functional groups. Such IFRET process extends of Eu3+ absorption band toward the UV and blue regions, enabling the proof-of-concept demonstration of multiresponsive anticounterfeiting codes. The study not only presents a new strategy to prepare porous lanthanide-doped complex oxides but also provides a feasible way to achieve spectral regulation through interfacial interaction for multifunctional luminescent materials. @@@ A facile soft template method of preparing porous complex oxides is developed based on stable micellar solutions formed with lanthanide-containing heteropolyoxomolybdate and alkaline earth citrates as metal salt precursors and block copolymers as templates. Anticounterfeiting application is demonstrated with the heterostructure composed of the porous complex oxides and carbon dots.image