Heavy-Atom Effect on the Thermally Activated Delayed Fluorescence Property of Naphthalimide-Phenoselenazine Electron Donor-Acceptor Dyads: Electron Transfer and Intersystem Crossing

Peiwen Jiang; Haotian Bai; Yuying Pei; Hongbing Fu; Yanqin Li; Yan Wan; Antonio Barbon; Antonio Toffoletti

doi:10.1039/d6cp00066e

January 1, 2026Physical Chemistry Chemical Physics

Heavy-Atom Effect on the Thermally Activated Delayed Fluorescence Property of Naphthalimide-Phenoselenazine Electron Donor-Acceptor Dyads: Electron Transfer and Intersystem Crossing

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Key Points

The aim is to investigate the impact of heavy atoms on the delayed fluorescence properties of naphthalimide-based electron donor-acceptor dyads.
Synthesis of naphthalimide-based dyads with 10H-phenoxazine and 10H-phenoselenazine as donors.
Characterization of delayed fluorescence properties under thermal activation conditions.
Analysis of electron transfer and intersystem crossing processes.
Both NI-PXZ and NI-PSeZ exhibited significant thermally activated delayed fluorescence.
The introduction of heavy atoms influenced electron transfer rates.
Intersystem crossing was enhanced due to the heavy-atom effect, affecting the fluorescence lifetime.

Implication

Explores the delayed fluorescence properties in naphthalimide dyads, suggesting implications for photonic applications.

Abstract

We prepared two electron donor-acceptor dyads based on naphthalimide (NI) as electron acceptor and 10H-phenoxazine (PXZ) or 10H-phenoselenazine (PSeZ) as electron donor. Both NI-PXZ and NI-PSeZ show the thermally activated...

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Cite This Study

Jiang et al. (2026) studied this question.

synapsesocial.com/papers/699a9d65482488d673cd3437 https://doi.org/10.1039/d6cp00066e

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Heavy-Atom Effect on the Thermally Activated Delayed Fluorescence Property of Naphthalimide-Phenoselenazine Electron Donor-Acceptor Dyads: Electron Transfer and Intersystem Crossing

Key Points

Implication

Abstract

Discussion

Cite This Study

Heavy-Atom Effect on the Thermally Activated Delayed Fluorescence Property of Naphthalimide-Phenoselenazine Electron Donor-Acceptor Dyads: Electron Transfer and Intersystem Crossing

Key Points

Implication

Abstract

Discussion

Cite This Study

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