articleJournal of the American Chemical SocietyMar 18, 2025Closed access

Lone Pairs-Mediated Multiple Through-Space Interactions for Efficient Room-Temperature Phosphorescence

FMFulong MaBWBo WuSZSiwei ZhangJJJinhui JiangJSJinghong Shi

Shenzhen Institute of Information Technology · Hong Kong University of Science and Technology · +3 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

The simultaneous generation and stabilization of triplet excitons are the key to realizing efficient organic room temperature phosphorescence (RTP), which is challenging owing to the obscure mechanism and structure–property relationships. Herein, a strategy of lone-pair-mediated multiple through-space interactions (TSIs) is proposed to availably induce RTP. By incorporating heteroatoms to facilitate through-space n–n and n−π interactions, the lone pairs are delocalized throughout the structure, resulting in the dense splitting of the excited-state energy levels. Thus, more matched energy levels with a small energy gap between singlet and triplet states (ΔEST) emerge, resulting in multiple intersystem crossing…

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55
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Authors

14

Topics & keywords

Topics
Keywords
  • Chemistry
  • Phosphorescence
  • Lone pair
  • Space (punctuation)
  • Photochemistry
  • Chemical physics
  • Molecule
  • Organic chemistry
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