Search

A class of novel multifunctional hybrids assembled by lanthanide polyoxometalates, ionic liquid and lanthanide complexes were prepared through the reactions of ion exchange and coordination in mild conditions. These hybrids possess two luminescence centers, one is lanthanide polyoxometalates ([EuW10O36]9− or [TbW10O36]9−), the other is lanthanide complexes of 1,10-phenanthroline (phen) (or 2,2′-bipyridine (bpy)) and ionic liquid (1-methyl-3-propionic imidazole unit). Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD) analysis, thermo-gravimetric analysis (TGA), UV/vis diffuse reflectance spectra and photoluminescent properties are utilized to characterize these hybrid materials. The results reveal that all hybrids possess amorphous microstructures and are composed of inorganic polyoxometalates and lanthanide nitrate through chemical bonds. Most hybrids exhibit outstanding luminescent properties such as high quantum efficiency and long lifetimes. Moreover, the luminescent color of them can be tuned and even the white luminescence can be integrated. [ABSTRACT FROM AUTHOR]

[Display omitted] • The in-situ confined growth of CsPbX 3 was achieved in a hierarchically porous MOF. • A one-step perovskite precursor-impregnation approach was demonstrated. • The nanoconfined CsPbX 3 show bright luminescence and enhanced stability. • A primary WLED device showing a NTSC value of 125% was fabricated. Confining metal-halide perovskites within MOF hosts not only protects them from exterior environment stimulation and isolates them from each other without aggregation, but also enables a variety of new features and applications. In this work, a hierarchically porous MOF host was firstly explored for in-situ confined growth of CsPbX 3 perovskite nanocrystallites (PNCs). Compared with the previously used microporous MOF matrixes, this hierarchically porous MOF not only enables the impregnation of perovskite precursors in one step, but also allows more facile diffusion of the reactants, thus giving rise to high loading capacities and uniform distribution of CsPbX 3 perovskites. The MOF matrix serves as both template to guide the confined growth of monodispersed CsPbX 3 PNCs and encapsulation to enhance the stability of CsPbX 3 PNCs. The obtained CsPbX 3 @MOF nanocomposites show bright luminescence and good resistance to ambient moisture, UV light irradiation, and anion-exchange. By integrating the green-emitting CsPbBr 2 I@MOF and red-emitting CsPbI 3 @MOF nanocomposites with a commercial blue InGaN LED chip, we fabricate a primary WLED showing a NTSC value of 125% and Rec. 2020 of 93%, which highlights the potential in backlight display. [ABSTRACT FROM AUTHOR]

[Display omitted] • First systematic review on the stimuli‐responsive luminescent MOFs for anticounterfeiting. • The responsive mechanisms toward various stimulus are discussed. • The implementation strategies for advanced anti‐counterfeiting are presented. • Challenges and prospects of anticounterfeiting based on responsive luminescent MOFs are discussed. Smart stimuli-responsive luminescent metal–organic frameworks (MOFs), combining the unique advantages and exciting application prospects, have gained booming development in recent years. The powerful capability to respond the external chemical or physical stimuli through various manners makes them particularly attractive in anti-counterfeiting technologies. This review aims at the recent progress of the stimuli-responsive luminescent MOF materials for advanced anti-counterfeiting technologies. The representative types of stimuli, such as light, temperature, solvent, pH, ion are summarized. In addition, the responsive luminescence and mechanisms, and the implementation strategies for advanced anti-counterfeiting are discussed. We also briefly present the current challenges and future perspectives of stimuli-responsive luminescent MOF materials for anticounterfeiting application. We hope this review would provide some new insights and guidelines for the design and engineering of novel stimuli-responsive luminescent MOF materials for advanced anticounterfeiting and information encryption. [ABSTRACT FROM AUTHOR]