Light- and humidity-driven fluorescence changeable soft robot enabled by water-gated photoinduced electron transfer pathway

Free Radical Chemistry Enabled by Visible Light-Induced Electron Transfer

Harnessing visible light as the driving force for chemical transformations generally offers a more environmentally friendly alternative compared with classical synthetic methodology. The transition metal-based photocatalysts commonly employed in photoredox catalysis absorb efficiently in the visible spectrum, unlike most organic substrates, allowing for orthogonal excitation. The subsequent exc...

Nonequilibrium photoinduced electron transfer

Fluorescence-quenching phenomenon by photoinduced electron transfer between a fluorescent dye and a nucleotide base.

Fluorescently labeled oligonucleotide probes have been widely used in biotechnology, and fluorescence quenching by the interaction between the dyes and a nucleobase has been pointed out. This quenching causes big problem in analytical methods, but is useful in some other cases. Therefore, it is necessary to estimate the fluorescence quenching intensity under various conditions. We focused on th...

Fluorescence quenching by photoinduced electron transfer in the Zn2+ sensor zinpyr-1: a computational investigation.

We report a detailed study of luminescence switching in the fluorescent zinc sensor Zinpyr-1 by density functional methods. A two-pronged approach employing both time-dependent density functional theory (TDDFT) and constrained density functional theory (CDFT) is used to characterize low-lying electronically excited states of the sensor. The calculations indicate that fluorescence activation in ...

Photoinduced electron transfer and multiple states mechanisms

Results of our ps-fs laser photolysis studies on interactions between unlinked D(donor)-A(acceptor) systems in luminescence quenching reactions and reaction dynamics of produced transient CT (charge transfer) or IP(ion pair) states and also on some D-A systems linked by flexible chains or directly can be interpreted satisfactorily by considering the formation of multiple CT and/or IP states wit...