Perylene-Derived Triplet Acceptors with Optimized Excited State Energy Levels for Triplet–Triplet Annihilation Assisted Upconversion
作者： Xiaoneng Cui , Azzam Charaf-Eddin , Junsi Wang , Boris Le Guennic , Jianzhang Zhao
DOI: 10.1021/JO402718E
关键词:
摘要: A series of perylene derivatives are prepared as triplet energy acceptors for triplet-triplet annihilation (TTA) assisted upconversion. The aim is to optimize the levels T1 and S1 states acceptors, so that prerequisite TTA (2E(T1) > E(S1)) can be better satisfied, eventually increase upconversion efficiency. Tuning excited realized either by attaching aryl groups (via single or triple carbon-carbon bonds), assembling a perylene-BODIPY dyad, in which components present complementary state levels. generally decreased compared perylene. anti-Stokes shift, TTA, efficiencies new improved with respect hallmark. For dyads, fluorescence emission was substantially quenched polar solvents. Moreover, we found extension π-conjugation BODIPY donor significantly reduces level state. Low high beneficial photosensitizers.
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