State Key Laboratory of Bioelectronics, Southeast University, Nanjing, 211189, P. R. China.
Ordered Matter Science Research Center, Nanchang University, Nanchang, 330031, P. R. China.
Angew Chem Int Ed Engl. 2022 Nov 2;61(44):e202210809. doi: 10.1002/anie.202210809. Epub 2022 Oct 5.
Organosilicons have been used extensively in aerospace, electronics, food, medicine and other fields, due to their low viscosity, hydrophobicity, corrosion resistance, non-toxic, and physiologically inert features. Despite extensive interest, however, organosilicon ferroelectric crystals have never been found. Here, by using the chemical design strategy, we successfully obtained a molecular ferroelectric D-chiro-inositol-SiMe with polar P4 symmetry, whose spontaneous polarization can be electrically switchable on thin film. The introduction of organosilicon groups endows the thin films with excellent softness, ductility and flexibility (extremely low hardness of 72.8 MPa and small elastic modulus of 5.04 GPa) that are desirable for biomedical and human-compatible applications. As the first case of organosilicon ferroelectric crystal to date, this work offers a new structural paradigm for molecular ferroelectrics, and highlights their potential for flexible bio-electronic applications.
有机硅在航空航天、电子、食品、医药等领域得到了广泛的应用，因为它们具有低粘度、疏水性、耐腐蚀性、无毒和生理惰性等特点。然而，尽管人们对此非常感兴趣，但从未发现过有机硅铁电晶体。在这里，我们通过使用化学设计策略，成功地获得了具有极性 P4 对称的分子铁电 D-手性肌醇-SiMe，其自发极化可以在薄膜上进行电切换。有机硅基团的引入赋予了薄膜优异的柔软性、延展性和柔韧性（硬度极低为 72.8 MPa，弹性模量小为 5.04 GPa），非常适合生物医学和与人相容的应用。作为迄今为止首例有机硅铁电晶体，这项工作为分子铁电体提供了一个新的结构范例，并强调了它们在柔性生物电子应用中的潜力。
