The notoriously non-luminescent uncycled azophenine (Q) was harnessed with Bodipy and zinc(II)porphyrin antennas to probe its fluorescence properties, its ability to act as a singlet excited state energy acceptor and to mediate the transfer. Two near-IR emissions are depicted from time-resolved fluorescence spectroscopy, which are most likely due to the presence of tautomers of very similar calculated total energies (350 cm-1; DFT; B3LYP). The rates for energy transfer, kET(S1), for 1Bodipy*→Q are in the order of 1010-1011 s-1 and are surprisingly fast when considering the low absorptivity properties of the lowest energy charge transfer excited state of azophenine. The rational is provided by the calculated frontier MOs which show atomic contributions in the C6H4C≡CC6H4 arms, thus favoring the double electron exchange mechanism. In the mixed-antenna Bodipy-porphyrin star molecule, the rate for 1Bodipy*→porphyrin has also been evaluated (~16 x 1010 s-1) and is among the fastest rates reported for Bodipy-zinc(II)porphyrin pairs. This astonishing result is again explained from the atomic contributions of the C6H4C≡CC6H4 and C≡CC6H4 arms thus favouring the Dexter process, a process found here for the first time sensitively temperature-dependent. In overall, the azophenine turns out to be excellent for electronic communication.
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 January 2018.
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