Kondo Sae, Yoshimura Nobutaka, Yoshida Masaki, Kobayashi Atsushi, Kato Masako
Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.
Dalton Trans. 2020 Dec 8;49(46):16946-16953. doi: 10.1039/d0dt03167d.
A homogeneous thin film of a simple and highly luminescent Cu(i) complex, [CuI(PPh3)2(py)] (PPh3 = triphenylphosphine, py = pyridine) (Cu-py), was fabricated via spin coating using polyvinylpyrrolidone (PVP) and pyridine without destroying the complex. The thin film (Cu-py@PVP), with a thickness of 1 μm, exhibited efficient response to vapour, exhibiting reversible luminescence changes between blue-green and yellow upon exposure to vapours of N-heteroaromatic compounds such as py and 2-methylpyrazine (Mepyz). Vapochromic luminescence colour change resulting from ligand substitution was also observed in the crystal state, but the response of the thin film was remarkably faster than that of the crystalline samples. The vapour-induced ligand exchange on the thin film was fully characterised by comparing the luminescence properties of the Cu-py crystal with the newly prepared Cu(i) complex, [CuI(Mepyz)(PPh3)2] (Cu-Mepyz).
通过旋涂法，使用聚乙烯吡咯烷酮（PVP）和吡啶制备了一种由简单且高发光性的Cu(i)配合物[CuI(PPh3)2(py)]（PPh3 = 三苯基膦，py = 吡啶）（Cu-py）组成的均匀薄膜，且未破坏该配合物。厚度为1μm的薄膜（Cu-py@PVP）对蒸汽表现出高效响应，在暴露于N-杂芳族化合物（如py和2-甲基吡嗪（Mepyz））的蒸汽时，呈现出蓝绿色和黄色之间的可逆发光变化。在晶体状态下也观察到了由配体取代引起的变色发光颜色变化，但薄膜的响应明显快于晶体样品。通过比较Cu-py晶体与新制备的Cu(i)配合物[CuI(Mepyz)(PPh3)2]（Cu-Mepyz）的发光性质，对薄膜上蒸汽诱导的配体交换进行了全面表征。
