[2,2] Paracyclophanes-based double helicates for constructing artificial light-harvesting systems and white LED device

Abstract

The construction of efficient artificial light-harvesting systems (ALHSs) is of vital importance in utilizing solar energy. Herein, we report the non-covalent syntheses of double helicates PCP-TPy1/2 and Rp,Rp-PCP-TPy1/2 by metal-coordination interaction and their applications in ALHSs and white light-emitting diode (LED) device. All double helicates exhibit significant aggregation-induced emission in tetrahydrofuran/water (1:9, v/v) solvent. The aggregated double helicates can be used to construct one-step or sequential ALHSs with fluorescent dyes Eosin Y (EsY) and Nile red (NiR) with the energy transfer efficiency up to 89.3%. Impressively, the PMMA film of PCP-TPy1 shows white-light emission when doped 0.075% NiR, the solid of double helicates (Rp,Rp-) PCP-TPy2 can be used as the additive of a blue LED bulb to achieve white-light emission. In this work, we provided a general method for the preparation of novel double helicates and explored their applications in ALHSs and fluorescent materials, which will promote future construction and application of helicates as emissive devices.

Artificial light-harvesting nanoparticles based on a tripodal fluorescence sensor mediated by multiple luminescence mechanisms

“…Inspired by nature, many artificial light-harvesting systems (LHSs) 3–9 have been reported in recent years for different applications, such as photocatalysis, 10–23 bio-imaging, 24–26 information encryption 27–29 and light-emitting devices. 30–33 These systems are often nanoparticles (NPs) dispersed in aqueous media to meet the requirement of green production. Strategies for preparing such NPs generally include self-assembly, 34–37 micro-emulsion, 38–43 reprecipitation 44,45 etc.…”

A temperature-responsive artificial light-harvesting system in water with tunable white-light emission

“…1–4 The LHSs found in nature are sophisticated supramolecular assemblies of chlorophyll pigments that were encapsulated together in a protein scaffold. 5 To mimic natural photosynthesis, artificial LHSs have been developed in recent years based on assorted supramolecular scaffolds, 6–9 including biomacromolecules, 10–13 macrocycles/cages/stacks, 14–20 nanoparticles, 21–27 and hybrid materials. 28–32 It is well known that temperature has a great influence on photosynthesis.…”

Carbazole-based artificial light-harvesting system for photocatalytic cross-coupling dehydrogenation reaction

“…Notably, the antenna effect of WPP5-CTD-ESY was determined to be 38.5 (Fig. S32, ESI †), which was much higher than that of recent artificial LHSs in water, [13][14][15][16]19,24,25 highlighting the potential advantage of carbazole functionalization for artificial light-harvesting.…”

“…Notably, benefitting from the brilliant donor ability of CTD, the antenna effect of WPP5-CTD-ESY could reach 38.5, which is much higher than that of recently reported LHSs. [13][14][15][16]19,24,25 Moreover, according to the excellent light-harvesting ability, WPP5-CTD-ESY was further utilized as a catalyst for the photochemical reaction of benzothiazole and diphenylphosphine oxide. Fortunately, the photocatalytic product was successfully obtained and characterized by a single Considering the remarkable host-guest capability, WPP5 was selected as the host molecule to induce supramolecular self-assembly.…”