Room Temperature Phosphorescence in Solution from Thiophene-Bridged Triply Donor-Substituted Tristriazolotriazines.

Hugo Marchi Luciano,Giliandro Farias,Cristian M Salla,Larissa G Franca,Suman Kuila,Andrew P Monkman,Fabien Durola,Ivan H Bechtold,Harald Bock,Hugo Gallardo

Chemistry (Weinheim an der Bergstrasse, Germany)（2023）

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摘要

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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关键词

delayed fluorescence,heavy atom effect,phosphorescence,room temperature tristriazolotriazine

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