Observation of thermally activated intersystem crossing in room-temperature phosphorescence of weakly donor-acceptor-donor π-ternary molecules.

Wenbin Huang, Chenlong Wei, Yuxin Zhu, Qian Zhang, Zikai He

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Article in Chemical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1 citing paper in PubMed.

Synthesis, Photophysical Investigation, and Nitroaromatic Sensing Properties of Novel Fused Pyrrolo[1,2-f]azolo[1,5-a]pteridines.Journal of fluorescence · 2026
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5 authors.

Wenbin HuangSchool of Materials Science and Engineering, Harbin Institute of Technology Shenzhen Shenzhen Guangdong 518055 China zhangqf@hit.edu.cn hezikai@hit.edu.cn.ORCID https://orcid.org/0000-0003-3962-1114

Chenlong WeiSchool of Science, Harbin Institute of Technology Shenzhen Shenzhen Guangdong 518055 China.

Yuxin ZhuSchool of Science, Harbin Institute of Technology Shenzhen Shenzhen Guangdong 518055 China.

Qian ZhangSchool of Materials Science and Engineering, Harbin Institute of Technology Shenzhen Shenzhen Guangdong 518055 China zhangqf@hit.edu.cn hezikai@hit.edu.cn.ORCID https://orcid.org/0000-0003-2523-1553

Zikai HeSchool of Materials Science and Engineering, Harbin Institute of Technology Shenzhen Shenzhen Guangdong 518055 China zhangqf@hit.edu.cn hezikai@hit.edu.cn.ORCID https://orcid.org/0000-0001-9943-5677

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6 · The paper itself

Abstract

The direct observation of thermally activated intersystem crossing (TA-ISC) processes in room-temperature phosphorescence (RTP) has not been well investigated. Here, we reported four weakly donor-acceptor-donor π-ternary molecules featuring isomerism-dependent phosphorescence behaviors. The isomerism was modulated by changing the substitution position, offering tunable molecular planarity and π-conjugation. As a result, regulated energy levels and orbital configurations of the excited states facilitate additional TA-ISC channels as revealed by theoretical investigations. The temperature-dependent photoluminescence and fs- and ns-transient absorption spectra undoubtedly demonstrate their existence and effectiveness in promoting efficient and persistent RTP. The ISC rate constant achieves a breakthrough value of up to 1.93 × 10

Identifiers

PMID41262348

DOI10.1039/d5sc07119d

PMCPMC12626031

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