Authors
Juan Wei, Min Xiao, Chao Gao, Erli Wang, Hao Xu, Yuxia Zhang, Shujuan Liu, Yun Ma, Qiang Zhao
Published in
Angewandte Chemie (International ed. in English). Oct 27, 2026. Epub Oct 27, 2026.
Abstract
Transparent glass scintillators suppress grain-boundary scattering, but in many metal-halide glasses x-ray attenuation and terminal emission originate from the same local coordination unit, making their optimization mutually constraining. Here, we report molecular-emitter supramolecular glasses that functionally partition these roles between an organic phosphonium chromophore and a stoichiometrically incorporated zinc-halide environment. The phosphonium salt melt quenching methyl(4-(diphenylamino)phenyl)diphenylphosphonium iodide (o-TNP) with ZnX2 (X = Cl, Br, or I) and a trace amount of 4,4'-bipyridine (BP) produced transparent amorphous materials with glass-transition temperatures above 100°C. Across the halide series, the principal emission maximum remained within 493-500 nm, whereas the photoluminescence quantum yield increased from 3.53% to 10.01%, the average long-lived emission lifetime decreased from 9.7 to 4.4 µs, and the attenuation-corrected light yield rose from 14 909 to 22 954 photons MeV-1. The optimized TNP-ZnI2 screen achieved a system spatial resolution of 28.4 lp mm-1 at a thickness of 650 µm. After ten fragment-soften-recast cycles at 220°C, it retained 84% of its initial radioluminescence while preserving the emission maximum and spectral profile. This work provides a modular route for functional partitioning x-ray attenuation and long-lived excited-state dynamics with minimal perturbation of terminal emission energy.
PMID:
42935283
Bibliographic data and abstract were imported from PubMed on 27 Oct 2026.
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