Design and properties of multiple-emitter luminescent metal–organic frameworks

Abstract

Multi-emitter luminescent metal-organic frameworks (LMOFs) possess multiple emission bands that can cover a wider spectral region which is a prerequisite for white-light emitting and multi-dimensional ratiometric fluorescent sensing. By taking...

Highly luminescent mixed-ligand bimetallic lanthanoid(iii) complexes for photovoltaic applications

“…16,18 Another exciting aspect of the bimetallic complexes resides in the potential intermetallic energy transfer and potential tuneable emission which may have applications in the field of LEDs, optical sensors, temperature sensing, and bioimaging. 8,31,[36][37][38][39][40] Thus, as a continuation of our work searching for efficient down-shifters for photovoltaic applications, in this work, we study the synthesis, the structure, the photoluminescence of six new compounds with the general formula [M1M2 (bz) 4 ( phen) 2 (tta) 2 ] where M1 and M2 can be Eu 3+ , Gd 3+ , Tb 3+ and we study the effect of M1 and M2 on the photoluminescence. Moreover, we have encapsulated a photovoltaic mini-module with the compounds dispersed in an EVA film and studied the increase in the external quantum efficiency (EQE) and the evolution of the intensity-voltage (I-V) curves to quantify the improvement of the energy conversion in the photovoltaic process.…”

Luminescence-Color-Changing Sensing toward Melamine Based on a White-Light-Emitting Film

“…18,19 More importantly, it is expected to achieve lower limits of detection by simultaneously monitoring the luminescence response in every emission wavelength. 20,21 Therefore, white-light-emitting chemosensors with luminescence-color-changing behaviors have been widely concerned in recent years. 16 Lanthanide coordinate polymers (LnCPs) are crystalline hybrid materials assembled from organic polydentate linkers and inorganic lanthanide nodes.…”

“…It is a potential candidate for achieving the above target for a luminescence-color-changing sensing technology based on color tunable and white-light-emitting materials with multiemitting characteristic. , Especially for white-light-emitting luminophores, the trichromatic components (blue, green, and red) present different alternation toward analytes, improving the anti-interference ability and realizing luminescence-color-changing sensing. , More importantly, it is expected to achieve lower limits of detection by simultaneously monitoring the luminescence response in every emission wavelength. , Therefore, white-light-emitting chemosensors with luminescence-color-changing behaviors have been widely concerned in recent years . Lanthanide coordinate polymers (LnCPs) are crystalline hybrid materials assembled from organic polydentate linkers and inorganic lanthanide nodes. − For them, white-light emission is readily obtained by in situ doping various lanthanide ions and realize luminescence-color-changing sensing. − In the past 4 years, a series of white-light-emitting LnCPs or lanthanide metal–organic frameworks (Ln-MOFs) have been synthesized to determine metal cations, common oxoanions, solvent molecules, and organic contaminants. ,− In 2017, a white-light-emitting LnCP assembled by Sm 3+ /Eu 3+ /Tb 3+ ions and an l -DBTA organic ligand has been successfully synthesized, first exhibiting a luminescence-color-changing phenomenon toward Ag + and Mn 2+ cations in DMF solvents .…”

Phosphor-Free Electrically Driven White Light Emission from Nanometer-Thick Barium–Organic Framework Films

“…It is known that lanthanides may involve f–f and d–f transitions, which are usually of high intensity, while d–d transitions for transition metals and s–p transitions involving s- and p-block elements are mostly broad . Apart from lanthanides, several single-component white light-emitting compounds have been reported using d-block − and p-block − elements, but they still pose environmental threats. An in-depth study of nanoscale single-component white light emitters is urgently needed.…”