Bistable switch molecule DPACdCl4 showing four physical channels and high phase transition temperature

• Published in: Chinese chemical letters Vol. 36; no. 1; pp. 109530 - 596
• Main Authors: Zhang, Ying-Yu, Luo, Jia-Qi, Han, Yan, Zhang, Wan-Ying, Zhang, Yi, Lu, Hai-Feng, Fu, Da-Wei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2025; Institute for Science and Applications of Molecular Ferroelectrics,Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua 321004,China%Institute for Science and Applications of Molecular Ferroelectrics,Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua 321004,China; Ordered Matter Science Research Center,Jiangsu Key Laboratory for Science and applications of Molecular Ferroelectrics,Southeast University,Nanjing 211189,China
• Subjects: Crystal; Organic-inorganic hybrid; Perovskite; Phase transition; Piezoelectricity; Piezoelectricity; Perovskite; Organic-inorganic hybrid; Phase transition; Crystal
• ISSN: 1001-8417
• DOI: 10.1016/j.cclet.2024.109530

Multiple switchable physical channels within one material or device, encompassing optical, electrical, thermal, and mechanical pathways, can enable multifunctionality in mechanical-thermal-opto-electronic applications. Achieving integrated encryption and enhanced performance in storage and sensing presents a formidable challenge in the synthesis and functionality of new materials. In an effort to overcome the complexities associated with these multiple physical functions, this study investigates the large-size crystal of DPACdCl4 (DPA = diisopropylammonium), revealing significant features in rare multi-channel switches. This compound demonstrates the ability to switch between "OFF/0" and "ON/1" states in the mechanical-thermal-opto-electronic channels. Consequently, DPACdCl4 possesses four switchable physical channels, characterized by a higher phase transition temperature of 440.7 K and a competitive piezoelectric coefficient of 46 pC/N. Furthermore, solid-state NMR analysis indicates that thermally activated molecular vibrations significantly contribute to its multifunctional switching capabilities. The large-size molecular single crystal, processed from aqueous solution, is a multiple switchable materials, which exhibits the optical-electrical-thermal-mechanical switchable physical channels, including nonlinear optical SHG (optical), dielectricity (electrical), pyroelectricity (thermal) and piezoelectricity (mechanical). [Display omitted]