A Metal–Organic Supramolecular Box as a Universal Reservoir of UV, WL, and NIR Light for Long‐Persistent Luminescence

Abstract

Long persistent luminescence (LPL) materials have au nique photophysical mechanism to store light radiation energy for subsequent release.H owever,i nc omparison to the common UV source,w hite-light (WL) and near-infrared (NIR) excited LPL is scarce.Herein we report ametal-organic supramolecular boxbased on aD-p-A-type ligand. Owing to the integrated one-photon absorption (OPA) and two-photon absorption (TPA) attributes of the ligand, the heavy-atom effect of the metal center,a sw ell as p-stackinga nd Jaggregation states in the supramolecular assembly,L PL can be triggered by all wavebands from the UV to the NIR region. This novel designed supramolecular kit to affordLPL by both OPAa nd TPAp athwaysp rovides potential applications in anti-counterfeiting,c amouflaging,d ecorating,a nd displaying, among others. Figure 4. a) TDDFT energy levels and possible ISC channels of Cd 2 L 2 . b-e) Demonstration models for the application of Cd 2 L 2 in b) camouflaging, c) anti-counterfeiting, d) decorating, and e) displaying.

Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting

“…Alternatively, two-photon absorption (TPA) utilizes the near-infrared (NIR) wavelengths that are more accessible for biological sciences due to higher spatial resolution, less phototoxicity and deeper tissue penetration. 16,17 Although progress has been made, systems exhibiting twophoton-induced ultralong emission are limited to inorganic and organic-inorganic hybrid materials, [18][19][20][21] and two-photonexcited ultralong organic room temperature phosphorescence (TPUOP) materials from purely organic single component materials are unfortunately not yet discovered. The design and synthesis of TPUOP materials still remains a challenge because of the lack of efficient molecular design strategies.…”

Recent Advances of Persistent Luminescence Nanoparticles in Bioapplications

“…Yang et al reported a new type of metal-organic frameworks (MOFs) with long-lasting afterglow which showed highly tunable afterglow phosphorescence colors upon pyridine solution treatment. This finding supplies a group of MOFs-based persistent luminescence nanophosphors with high performance [150][151][152][153][154]. Up to now, the afterglow MOFs have not been used in biomedical fields in vivo due to the relatively short emission wavelength and the undesirable diameter.…”

Optical Waveguide Color Tuning by Fluorescence–Phosphorescence Dual Emission and Disparity of Optical Losses

“…4‐(9H‐Carbazol‐9‐yl)‐phenyl‐2,3′:6′,3″‐terpyridine (Caz‐PhTpy) was synthesized in two steps via reported methods for reference. [ 22,23 ] (see Scheme S1, Supporting Information, for preparation details). The as‐prepared microcrystalline sample was named as Powder and characterized by 1 H NMR, IR, and MS spectra (Figures S1–S3, Supporting Information).…”