Issue 24, 2023

Efficient triplet energy transfer in a 0D metal halide hybrid with long persistence room temperature phosphorescence for time-resolved anti-counterfeiting

Abstract

Endowing metal halide hybrids (MHHs) with time-resolved emission and afterglow could significantly broaden their applications in fields such as information security and anti-counterfeiting. Nonetheless, there have been relatively few successes in developing organic cations with persistent room-temperature phosphorescence (RTP) to construct MHHs with afterglow. In this work, we synthesize a new polyazole, 3,5-di(1H-pyrazol-4-yl)-4H-1,2,4-triazol-4-amine (DPTA), with green persistent RTP up to 1.5 s. The afterglow of DPTA reaches up to ∼1.0 s even after being assembled into 0D (DPTAH3)InCl6·2.5H2O (DIC). Due to strong overlap between the triplet emission of DPTA and 1S03Px absorption of Sb3+, efficient triplet energy transfer (TET) with the highest yield of 65.3% and a near-unity photoluminescence quantum yield (PLQY) is achieved. More importantly, the afterglow persistence time of DIC:x% Sb can be easily tailored through Sb3+ doping. Given the Sb3+-dependent emission color and long persistence time, a series of DIC:x% Sb are successfully utilized to demonstrate high-security-level anti-counterfeiting application. This work shows an effective strategy for designing new MHHs with tunable emission and afterglow persistence time.

Graphical abstract: Efficient triplet energy transfer in a 0D metal halide hybrid with long persistence room temperature phosphorescence for time-resolved anti-counterfeiting

Supplementary files

Article information

Article type
Research Article
Submitted
03 sep. 2023
Accepted
23 oct. 2023
First published
23 oct. 2023

Inorg. Chem. Front., 2023,10, 7167-7175

Efficient triplet energy transfer in a 0D metal halide hybrid with long persistence room temperature phosphorescence for time-resolved anti-counterfeiting

J. Li, J. Wu, Y. Xiao, L. Rao, R. Zeng, K. Xu, X. Huang, J. Z. Zhang and B. Luo, Inorg. Chem. Front., 2023, 10, 7167 DOI: 10.1039/D3QI01774E

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