查看更多>>摘要：Highly efficient aqueous artificial-light-harvesting systems(ALHSs)were successfully fabricated based on the supramolecular assembly of naphthalenyl-phenylacrylonitrile derivative(NPT),water-soluble pillar [5]arene(WP5),and three kinds of pigments(4,7-di(2-thienyl)-2,l,3-benzothiadiazole(DBT),Eosin Y(ESY),and sulforhodamine-101(SR101)).The assembled ALHSs perform a high energy-transfer-efficiency(Φ_(ete))and antenna effect(90.9% and 40.6 for WP53NPT-DBT,81.5% and 39.1 for WP5dNPT-ESY as well as 71.3% and 38.4 for WP5DNPT-SR101),suggesting that the energy of WP5DNPT complex has been effectively transferred to pigment acceptors(DBT,ESY,and SR101).Notably,during the energy-transfer process of WP5DNPT-SR101 ALHS,a white light emission(Φ_(QY)= 24.21%)could be achieved by tuning the molar-ratio of [NPT]/[SR101] to 250:1,which is close to that of natural light-harvesting system,displaying a promising application in simulating natural light-harvesting system.Furthermore,the WP5DNPT-SR101 ALHS was successfully utilized as nano-reactors to catalyze the free-radical dehalogenation reactions of 2-bromo-acetophenone,2-bromo-4'-mefhyl-acetophenone,and 2-bromo-4'-nitroacetophenone with the yields of 92%,90% as well as 95%,which realized the energy transformation from solar-energy to chemical-energy,displaying a potential prospect in the field of artificial photosynthesis systems.
查看更多>>摘要：In this study,a novel aggregation-induced emission(AIE)material of maltose(mal)was found.Due to mal has various oxygen clusters with a sufficientiy rigid conformation,which makes the clustering-triggered emission(CTE)mechanism more rational.Since Fe~(3+)can quench the fluorescence of mal,thus,mal can be used as a biosensor to detect Fe~(3+).Furthermore,mal has room temperature phosphorescence.So,mal has broad application prospects in anti-counterfeiting display.In addition,due to mal is excitation-dependent,it can also be used as a three-color bioimaging.
查看更多>>摘要：The synthesis of three 2-arylalkynyl-4,5-diarylimidazoles endcapped with typical electron-donating(ED)and electron-withdrawing(EW)groups(push-pull system)and their evaluation as fluorescent dyes for thin-film luminescent solar concentrators(LSCs)is described.These novel Y-shaped imidazole-based fluorophores were easily assembled in good chemical yields through a three-step synthetic sequence involving a double Suzuki arylation,followed by a dehydrogenative alkynylation,and a Knoevenagel condensation.Their optical and spectroscopic properties were analyzed both in solution and in poly(methyl methacrylate)(PMMA)films.All the molecules in PMMA films showed an intense,red-shifted emission between 540 and 575 nm with large Stokes shift(>120 nm),moderate-to-good fluorescence quantum yields(QY)and good device efficiencies(η_(dey)),especially for compound 3.
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