Poungsripong Peeranuch, Boonprab Theerapoom, Harding Phimphaka, Murray Keith S, Phonsri Wasinee, Zhang Ningjin, Kitchen Jonathan A, Harding David J
Functional Materials and Nanotechnology Center of Excellence, Walailak University Thasala Nakhon Si Thammarat 80160 Thailand.
School of Chemistry, Institute of Science, Suranaree University of Technology Nakhon Ratchasima 30000 Thailand
RSC Adv. 2024 Sep 10;14(39):28716-28723. doi: 10.1039/d4ra06111j. eCollection 2024 Sep 4.
Designing and integrating Fe(iii)-based spin crossover (SCO) complexes onto substrates remains a challenging goal with only a handful of examples reported. In this work, we successfully synthesized and characterized three [Fe(qsal-OR)]NO (qsal-OR = 5-alkoxy-2-[(8-quinolylimino)methyl]phenolate) complexes, in which R = CH1, CH2, and CH3 to explore the impact of alkyl chain on the modulation of SCO activity and potential for self-assembly on a glass surface. The SCO is found to be gradual and incomplete in all cases, with the LS state more stabilised as the alkyl group shortens. We also demonstrate that all complexes form stable Langmuir films and achieve good transfer ratios to the glass surface, with 2 being the best in terms of stability. This paves the way for the SCO modulation of complexes in this class and the development of SCO devices.
将基于铁（III）的自旋交叉（SCO）配合物设计并整合到基底上仍然是一个具有挑战性的目标，目前仅有少数相关示例报道。在这项工作中，我们成功合成并表征了三种[Fe(qsal-OR)]NO（qsal-OR = 5-烷氧基-2-[(8-喹啉基亚氨基)甲基]苯酚盐）配合物，其中R = CH₃、CH₂和CH₃，以探究烷基链对SCO活性调制的影响以及在玻璃表面自组装的潜力。在所有情况下，SCO均呈现出渐进且不完全的特性，随着烷基链缩短，低自旋（LS）态更加稳定。我们还证明了所有配合物都能形成稳定的朗缪尔膜，并在向玻璃表面转移时具有良好的转移率，其中配合物2在稳定性方面表现最佳。这为这类配合物的SCO调制以及SCO器件的开发铺平了道路。
