Reczyński Mateusz, Pinkowicz Dawid, Nakabayashi Koji, Näther Christian, Stanek Jan, Kozieł Marcin, Kalinowska-Tłuścik Justyna, Sieklucka Barbara, Ohkoshi Shin-Ichi, Nowicka Beata
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland.
Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Angew Chem Int Ed Engl. 2021 Feb 1;60(5):2330-2338. doi: 10.1002/anie.202012876. Epub 2020 Dec 15.
Bistable and stimuli-responsive molecule-based materials are promising candidates for the development of molecular switches and sensors for future technologies. The CN-bridged {NH [Ni(cyclam)][Fe(CN) ]⋅5 H O} chain exists in two valence states: Ni -Fe (1 ) and Ni -Fe (1 ) and shows unique multiresponsivity under ambient conditions to various stimuli, including temperature, pressure, light, and humidity, which generate measurable response in the form of significant changes in magnetic susceptibility and color. The electron-transfer phase transition 1 ↔1 shows room-temperature thermal hysteresis, can be induced by irradiation, and shows high sensitivity to small applied pressure, which shifts it to higher temperatures. Additionally, it can be reversibly turned off by dehydration to the {NH [Ni (cyclam)][Fe (CN) ]} (1 d) phase, which features the Ni -Fe valence state over the whole temperature range, but responds to pressure by yielding Ni -Fe above 1.06 GPa.
双稳态和刺激响应性分子基材料是未来技术中分子开关和传感器开发的有前途的候选材料。由CN桥连的{NH [Ni(环戊二胺)][Fe(CN) ]⋅5 H O}链存在两种价态：Ni -Fe (1 )和Ni -Fe (1 )，并且在环境条件下对各种刺激（包括温度、压力、光和湿度）表现出独特的多响应性，这些刺激会以磁化率和颜色的显著变化形式产生可测量的响应。电子转移相变1 ↔1表现出室温热滞现象，可由辐照诱导，并且对小的外加压力表现出高灵敏度，这会使其转变到更高温度。此外，通过脱水到{NH [Ni (环戊二胺)][Fe (CN) ]} (1 d)相可以使其可逆关闭，该相在整个温度范围内具有Ni -Fe价态，但在压力高于1.06 GPa时会产生Ni -Fe响应。
