Synapse
⌘+K
Synapse
PulseExploreClubsResearchersJournals
Instagram
HomeClubsExplore
November 25, 2019The Journal of Physical Chemistry COpen Access

Red Thermally Activated Delayed Fluorescence and the Intersystem Crossing Mechanisms in Compact Naphthalimide–Phenothiazine Electron Donor/Acceptor Dyads

View Full Paper
Ask AI
Bookmark
Share

Authors

GTGeliang TangDalian University of TechnologyАСА. А. СухановKazan Scientific CenterJZJianzhang ZhaoChina University of Petroleum, Beijing

Discussion

Loading...

Member takes

Overview

Photophysical analysis demonstrates red thermally activated delayed fluorescence in compact donor-acceptor dyads, highlighting the impact of linker-controlled electronic coupling.

Key Points

  • To evaluate how linker-induced conformational restrictions influence electronic coupling, intersystem crossing mechanisms, and thermally activated delayed fluorescence in compact electron donor-acceptor dyads.
  • Synthesized two compact phenothiazine-naphthalimide dyads using either a C–N linker (NI-N-PTZ) or a C–C linker (NI-C-PTZ).
  • Characterized electronic coupling matrix elements (V_DA) and photophysical properties using optical spectroscopy and time-resolved electron paramagnetic resonance (TREPR) spectroscopy.
  • NI-C-PTZ showed stronger ground-state electronic coupling (V_DA = 2548 cm⁻¹) than NI-N-PTZ (V_DA = 870 cm⁻¹).
  • Thermally activated delayed fluorescence emitting in the red spectral region occurred solely in NI-N-PTZ as a result of its reduced electronic coupling.
  • TREPR spectroscopy revealed two triplet excited states and three intersystem crossing pathways (RP-ISC, SOCT-ISC, and SO-ISC), alongside an electron spin polarization inversion between 0.5 and 1.1 μs.

Cite This Study

Tang et al. (2019) studied this question.

synapsesocial.com/papers/6aa3afeb625a3fdb5b7495c3https://doi.org/10.1021/acs.jpcc.9b09335
View Full Paper
Ask AI
Bookmark
Share

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Charge Transfer and Intersystem Crossing in Compact Naphthalenediimide–Phenothiazine Triads: Synthesis and Study of the Photophysical Property with Transient Optical and Electron Paramagnetic Resonance Spectroscopic Methods2024 · 1 citations
  2. 2Effect of Thionation of the Carbonyl Groups in Naphthalimide‐Phenoxazine Electron Donor–Acceptor Dyads on the Excited‐ State Dynamics: Transient Optical and Electron Paramagnetic Resonance Spectral Studies2025
  3. 3Heavy-Atom Effect on the Thermally Activated Delayed Fluorescence Property of Naphthalimide-Phenoselenazine Electron Donor-Acceptor Dyads: Electron Transfer and Intersystem Crossing2026 · 1 citations
  4. 4Donor Relocation Enables Simultaneous Strong Absorption and Small Singlet‐Triplet Gap in 1,8‐Naphthalimide Derivatives2026
  5. 5Study of the thermally-activated delayed fluorescence (TADF) mechanism of phenothiazine-dibenzothiophene-2025