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Updated: Aug 14, 2025

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Published on: December 27, 2018
Room Temperature Phosphorescence in Solution from Thiophene-Bridged Triply Donor-Substituted Tristriazolotriazines
Hugo Marchi Luciano1,2, Giliandro Farias1, Cristian M Salla3
1Departamento de Química, Universidade Federal de Santa Catarina Trindade, 88040-900, Florianópolis, SC, Brazil.
Abstract:
Most organic room-temperature phosphorescence (RTP) emitters do not show their RTP in solution. Here, we incorporated sulfur-containing thiophene bridges between the donor and acceptor moieties in D3 A-type tristriazolotriazines (TTTs). The thiophene inclusion increased the spin-orbit coupling associated with the radiative T1 →S0 pathway, allowing RTP to be observed in solution for all compounds, likely assisted by protection of the emissive TTT-thiophene core from the environment by the bulky peripheral donors.
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