A series of novel donor–acceptor–donor triads, namely PFTn (n = 0–4), consisting of fluorene-oligothiophenes (FTn) as a donor and perylenediimide (PDI) as an acceptor were synthesized and characterized. The chemically bonded electron donor and acceptor chromophores in the triads were found to be independent. These triads showed a strong intramolecular photo-induced electron transfer (PET) between both chromophores, which gave rise to a quasi-quantitative fluorescence quenching of both PDI and FTn moieties. Distinctively, a reverse energy transfer from the acceptor PDI to the donor FTn induced a strong fluorescence emission from the FTn moieties in the triads PFT3 and PFT4. The PFTn (n = 1–3) triads were proven to undergo an electrochemical oxidative coupling reaction and become electropolymerizable materials to form polymer plastic films (poly(PFTnn)), while PFT4 proved to be an electrochemically stable molecule.
我们合成了一系列新颖的供体-受体-供体三元组,即PFTn(n = 0-4),其中,
芴-寡
噻吩(FTn)为供体,
苝二
亚胺(PDI)为受体,并对它们进行了表征。我们发现三元组中
化学键合的电子供体和受体发色团是相互独立的。这些三元组在两个发色团之间表现出强烈的分子内光诱导电子转移(PET),从而对PDI和FTn部分产生了准定量的荧光猝灭。值得注意的是,在PFT3和PFT4三元组中,受体PDI向供体FTn的反向能量转移引起了FTn部分的强烈荧光发射。PFTn(n = 1-3)三元组被证明能够发生电
化学氧化偶联反应,并成为可电聚合的材料,形成聚合物塑料薄膜(poly(PFTnn)),而PFT4被证明是一种电
化学稳定的分子。