Kusumoto Sotaro, Inaba Kazumasa, Suda Harutoshi, Nakaya Manabu, Tokunaga Ryuya, Thuéry Pierre, Haruki Rie, Kanazawa Tomoki, Nozawa Shunsuke, Kim Yang, Hayami Shinya, Koide Yoshihiro
Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
Department of Chemistry, Faculty of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
Inorg Chem. 2023 Oct 2;62(39):16222-16227. doi: 10.1021/acs.inorgchem.3c02776. Epub 2023 Sep 19.
Two mononuclear Ni(II) complexes ( and ) have been found to display color changes upon coordination/decoordination of pyridine, resulting in their structural transformation between square-planar and octahedral geometries as well as a change in their spin state. Compound changes between red () and yellow () upon exposure to or elimination of pyridine, while undergoes a two-step transformation, changing orange ( = 0) ⇄ gray ( = 1) → yellow ( = 1) depending on the reaction time. The first step ( → ) takes less than 45 min, which is significantly faster than the previously reported reaction time of 1 day for a Ni(II) complex/pyridine vapor system. Compound reacting with pyridine can be easily prepared by dispersing in methanol instead of annealing at high temperatures (130 °C), which can be applied to develop chemical sensors for pyridine utilizing color changes and/or magnetic switching.
已发现两种单核镍（II）配合物（ 和 ）在吡啶配位/去配位时会发生颜色变化，导致其结构在平面正方形和八面体几何构型之间转变，以及自旋态发生变化。化合物 在暴露于吡啶或除去吡啶时会在红色（ ）和黄色（ ）之间变化，而 则经历两步转变，根据反应时间不同，从橙色 （ = 0）⇄灰色 （ = 1）→黄色 （ = 1）。第一步（ → ）耗时不到45分钟，这比之前报道的镍（II）配合物/吡啶蒸气体系1天的反应时间要快得多。通过将 分散在甲醇中而非在高温（130°C）下退火，可以轻松制备与吡啶反应的化合物 ，这可用于开发利用颜色变化和/或磁开关的吡啶化学传感器。
