Loading Photochromic Molecules into a Luminescent Metal–Organic Framework for Information Anticounterfeiting

Abstract

Stimuli-responsive photoluminescent materials have attracted considerable attention owingt ot heir potential applications in security protection because the information recorded directly in materials with static luminescent outputs are usually visible under either ambient or UV light. Herein, we realizer eversible information anticounterfeiting by loading ap hotoswitchable diarylethene derivative into al anthanide metal-organic framework (MOF). Light triggers the open-and closed-form isomerization of the diarylethene unit, which respectively regulates the inactivation and activation of the photochromic FRET process between the diarylethene acceptor and lanthanide donor,r esulting in reversible luminescence on-off switching of the lanthanide emitting center in the MOF host. This photoresponsive host-guest system allows for reversible multiple information pattern visible/invisible transformation by simply alternating the exposure to UV and visible light.

In Situ Control of Multicolor Luminescence over the Entire Visible Spectral Region in a Single Chromophore by Sol–Gel Transformation and Dynamic Metal–Ligand Coordination

“…[6][7][8] In particular, research on multicolor emitting chromophores is of fundamental importance, [9][10][11] as they can serve as key precursors in achieving advanced functions of signal generation, [12][13][14][15] information storage and processing, [16][17][18] displays, [19][20][21][22] optical imaging, [23][24][25] and anticounterfeiting. [26][27][28][29][30][31] Control of molecular switches has been demonstrated as an effective way to modulate the luminescence conversion processes of chromophores. [32][33][34][35] Research on external stimuli-triggered luminescence switching has also been widely reported.…”

“On-The-Fly” Non-Adiabatic Dynamics Simulations on Photoinduced Ring-Closing Reaction of a Nucleoside-Based Diarylethene Photoswitch

“…Photochromism in molecular systems refers to a photoinduced reversible transformation between two isomers having distinct absorption spectra. In addition to the color change, such a reaction is often accompanied with changes in some other physical/chemical properties such as fluorescence emission, geometry structure as well as chemical reactivity, et cetera, which gives it various applications in the fields of optical materials, memories, photoswitches and biological systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Motivated by their wide applications, several photochromic families such as azobenzenes, furylfulgides, spiropyrans, diarylethenes, et cetera, have been developed, in which the azobenzenes and furylfulgides change structures via Z / E isomerization while spiropyrans and diarylethenes transform between their open and closed forms via ring closing and opening reactions [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

Fluorescence Photoswitching in a Series of Metal‐Organic Frameworks Loaded with Different Anthracenes

“…Unfortunately, many of the switching characteristics in the solution are not readily transferable to the solid state since the switching mechanism is hindered in a densely packed phase. One promising strategy to overcome this challenge is to confine photoswitchable guests in porous solids, such as zeolites, mesoporous silica, and metal‐organic frameworks (MOFs) [12–22] …”