Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (8): 20260106.doi: 10.7503/cjcu20260106

• Organic Chemistry • Previous Articles     Next Articles

Modulation of Long-lived Room-temperature Phosphorecence via Aggregation-state Control of a Terpyridine-phenylboronic Acid in a Host-guest Doping System

ZENG Mingtao, SHI Wenjing, WANG Jun()   

  1. College of Chemistry and Material Science,Guizhou Normal University,Guiyang 550001,China
  • Received:2026-03-14 Online:2026-08-10 Published:2026-05-14
  • Contact: WANG Jun E-mail:wjc@gznu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22161012);the General Fund of the Department of Science and Technology of Guizhou Province, China(MS[2026]445)

Abstract:

The photophysical properties of 4-(([2,2′∶6′,2″-terpyridin]-4′-yl)phenyl)boronic acid(B-Tpy) under different aggregation states were investigated. 1H NMR titration and fluorescence spectroscopy were employed to confirm the aggregation-induced emission(AIE) characteristics. Solid-state B-Tpy exhibits blue fluorescence at 401 nm, with a lifetime of 2.89 ns and a quantum yield of 2.79%. Following the introduction of B-Tpy into boric acid(BA) and subsequent thermal treatment at 200 ℃, the resulting composite material exhibits dual emission of fluorescence and room-temperature phosphorescence(RTP), with an afterglow duration of up to 24 s. Quantitative calculations indicate that B-Tpy possesses a significant spin-orbit coupling constant[ξS1T1)=6.58 cm⁻1], which promotes intersystem crossing, thereby facilitating long-lived RTP emission. This study proposes a novel strategy for long-lived RTP materials.

Key words: Organic RTP, Aggregation-induced emission(AIE), Host-guest doping, Dual-state emission

CLC Number: 

TrendMD: