Jamshidi Mahboubeh, Bouheriche Joey, Gardner James M
Department of Chemistry, Division of Applied Physical Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden.
Front Chem. 2023 Dec 11;11:1330227. doi: 10.3389/fchem.2023.1330227. eCollection 2023.
The paper presents the fabrication and characterization of [CuI(L)] thin films, where L represents various alkylpyridine ligands including 4-methylpyridine, 3-methylpyridine, 2-methylpyridine, 4-butylpyridine, 3,4-dimethylpyridine, and 3,5-dimethylpyridine. The thin films were synthesized by exposing the corresponding ligands to CuI thin films through vapor deposition. The coordination reactions occurring on the films were investigated using PXRD and time-dependent photoluminescence spectroscopy, and a comparison was made between the structures of the thin films and the corresponding powder phases. The films showed primarly blue emission (λ = 457-515 nm) and polymeric structures with excited state lifetimes ranging from 0.6 to 5.5 μs. Significantly, the studied compounds exhibited fast reversible luminescence quenching when exposed to vapors of dichloromethane and dibromomethane (15 and 30 min respectively), and the luminescence was restored upon re-exposure to the alkylpyridine ligand (after 20 min). These findings indicate that these thin films hold promise for applications as sensors (with sensitive and reversible detection capability) for volatile halogen-based compounds (VHC).
本文介绍了[CuI(L)]薄膜的制备与表征，其中L代表各种烷基吡啶配体，包括4-甲基吡啶、3-甲基吡啶、2-甲基吡啶、4-丁基吡啶、3,4-二甲基吡啶和3,5-二甲基吡啶。通过气相沉积将相应的配体暴露于CuI薄膜上来合成这些薄膜。使用粉末X射线衍射（PXRD）和时间分辨光致发光光谱研究了薄膜上发生的配位反应，并对薄膜结构与相应粉末相进行了比较。这些薄膜主要发射蓝光（λ = 457 - 515 nm），具有聚合物结构，激发态寿命在0.6至5.5 μs之间。值得注意的是，所研究的化合物在暴露于二氯甲烷和二溴甲烷蒸汽时（分别为15分钟和30分钟）表现出快速可逆的发光猝灭，重新暴露于烷基吡啶配体后（20分钟后）发光恢复。这些发现表明，这些薄膜有望用作挥发性卤素基化合物（VHC）的传感器（具有灵敏且可逆的检测能力）。
