Tetraphenylethylene‐Based Multicomponent Emissive Metallacages as Solid‐State Fluorescent Materials

Abstract

The construction of solid‐state fluorescent materials with high quantum yield and good processability is of vital importance in the preparation of organic light‐emitting devices. Herein, a series of tetraphenylethylene (TPE)‐based multicomponent emissive metallacages are prepared by the coordination‐driven self‐assembly of tetra‐(4‐pyridylphenyl)ethylene, cis‐Pt(PEt3)2(OTf)2 and tetracarboxylic ligands. These metallacages exhibit good emission both in solution and in the solid state because the coordination bonds and aggregation restrict the molecular motions of TPE synergistically, which suppresses the non‐radiative decay of these metallacages. Impressively, one of the metallacages achieves very high fluorescence quantum yield (ΦF=88.46 %) in the solid state, which is further used as the coatings of a blue LED bulb to achieve white‐light emission. The study not only provides a general method to the preparation of TPE‐based metallacages but also explores their applications as solid‐state fluorescent materials, which will promote the future design and applications of metallacages as useful emissive devices.

Restriction of Intramolecular Vibration in Aggregation‐Induced Emission Luminogens: Applications in Multifunctional Luminescent Metal–Organic Frameworks

“…Furthermore,t he intense yellow emission and excellent stability of 3 endowed it with potential application prospects for the development of white LEDs. [18] As shown in Figure 5D,af ilm containing 3 was covered on ab lue LED chip.U pon connection to an electrical power of 2.4 V, the resultant LED chip glowed with nearly bright white colour, whose CIE coordinate was (0.30, 0.34) (Figure 5E). After lighting for 300 h, the emission spectrum of the device barely changed, indicating excellent stability (Figure 5F).…”

Metallacycles, metallacages, and their aggregate/optical behavior

“…One of the metallacages achieves a very high fluorescence quantum yield (ΦF = 88.46 %) in the solid state, which is further used as the coating of a blue LED bulb to achieve white-light emission (Figure 13B). [70] Phillips synthesized Pt(II) tpy/bpy acetylide complexes with a TPE derivative as the ancillary ligand. The ultrafast photophysical dynamics of the TPE-based triplet excited states are examined systematically.…”

“…F I G U R E 1 3 (A) Schematic representation of the manipulated supramolecular aggregation of M72 and heparin [69] ; (B) tetraphenylethylene-based multicomponent emissive metallacages as solid-state fluorescent materials. [70] Copyright 2021, American Chemical Society.…”

Amphiphilic rhomboidal metallacycles with aggregation-induced emission and aggregation-caused quenching luminogens for white-light emission and bioimaging

“…This furnishes a new approach for the construction of excellent light-emitting materials. 32,40–45 Stang and co-workers found that embedding an amine group into the metallacycles core significantly red-shifts the emission wavelengths of the resultant SCCs ( ca. 80–100 nm) with high quantum yields due to the interactions between metal ions and ligands.…”