Mixed thermal condensation produced a linear trimer from benzoguanamine, indicating enhanced yields and phosphorescence properties.
The polymerization mechanism and key oligomer intermediates during thermal condensation of benzoguanamine (BG) are unclear. Herein, we report a mixed thermal condensation strategy using BG and pre-synthesized dimer to produce the trimer (BG)₃ with significantly enhanced yield. Comprehensive characterizations confirm its linear structure. (BG)₃ exhibits a high molar absorption coefficient, approximately double the dimer and quadruple the monomer. Crucially, it displays crystallization-induced room-temperature phosphorescence (CIRTP) with a lifetime of 514.9 µs in the crystalline state.
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Meng et al. (2025) studied this question.
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