Scalable Solvent-Free Synthesis of a Linear Heteroaromatic Trimer with Crystallization-Induced Phosphorescence
The polymerization mechanism and the identification of key oligomer intermediates during the thermal condensation of benzoguanamine (BG) remain unclear. Herein, we report a novel mixed thermal condensation strategy using BG and a pre-synthesized dimer to selectively synthesize the trimer (BG)<sub>3</sub> with a significantly enhanced yield. Comprehensive characterization techniques confirm the formation of a linear molecular structure for (BG)<sub>3</sub>. Notably, (BG)<sub>3</sub> exhibits a high molar absorption coefficient, approximately double the dimer and 4-fold greater than the monomer. Notably, (BG)<sub>3</sub> demonstrates crystallization-induced phosphorescence (CIP) with a lifetime of 514.9 μs in the crystalline state at room temperature.
Authors
- Jingsan Xu (ORCID: https://orcid.org/0000-0003-1172-3864)
- Peng Meng (ORCID: https://orcid.org/0000-0002-4624-2430)
- Daigo Miyajima (ORCID: https://orcid.org/0000-0002-9578-7349)
- Feng Gao (ORCID: https://orcid.org/0000-0001-7420-2498)
- Parvej Alam (ORCID: https://orcid.org/0000-0001-6534-4953)
- Jiaqi Peng (ORCID: https://orcid.org/0000-0001-7743-4518)
- Zijie Qiu (ORCID: https://orcid.org/0000-0003-0728-1178)
- Ben Zhong Tang (ORCID: https://orcid.org/0000-0002-0293-964X)
- Bo Wu (ORCID: https://orcid.org/0000-0003-1313-7869)
- Lei Zeng (ORCID: https://orcid.org/0000-0003-0419-4933)
Institutions
- Queensland University of Technology (AU)
- Chinese University of Hong Kong (HK)
- Institute for Basic Science (KR)
- Division of Materials Science and Engineering (AU)
- Wuhan Institute of Technology (CN)
Publication Details
- Journal
- Organic Letters
- Published
- 2025-09-09
- DOI
- https://doi.org/10.1021/acs.orglett.5c03132
- Citations
- 1
- Primary Topic
- Luminescence and Fluorescent Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.52