ArticleACS central science2026
From Fundamental Photophysics to Photocatalysis: Energy Gap Law Analysis of Anion Radical Excited States.
Article in ACS central science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Excited-state ion radicals have recently attracted attention as powerful reductants or oxidants for electron-transfer photocatalysis. A key challenge in their application as photocatalysts is the short lifetime of their excited states, which directly impacts the efficiency of bimolecular photoinduced electron transfer. Here, we present a comprehensive photophysical study aimed at elucidating the factors that govern the lifetime of the doublet excited state in a series of 10 anion radicals derived from structurally related π-conjugated donor-acceptor-donor (DAD) molecules. In these systems, the acceptor is a 2,1,3-benzothiadiazole (BTD) unit flanked by arylene or oligo-(arylene) groups. The anion radicals, generated by chemical reduction in deoxygenated DMF, are stable and were characterized using UV-visible-near-IR absorption/emission spectroscopy and femtosecond transient absorption spectroscopy. Remarkably, the doublet excited state lifetimes vary by nearly 200-fold across the series, ranging from 2.9 to 565 ps. Nonradiative decay rates increase as the excited-state energy decreases, in a manner that is quantitatively consistent with the energy gap law for nonradiative decay. Faster decay is observed for anion radicals with highly delocalized π-systems, reflecting their lower excited-state energies. Finally, we demonstrate the catalytic utility of DAD anion radicals with long-lived doublet excited states in a consecutive photoinduced electron transfer (ConPET) process, using the photodebromination of 4-bromoacetophenone as a model reaction.
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.