Gas‐Induced Electrical and Magnetic Modulation of Two‐Dimensional Conductive Metal–Organic Framework

• Published in: Angewandte Chemie Vol. 136; no. 24
• Main Authors: Meng, Zheng, Stolz, Robert M., De Moraes, Lygia Silva, Jones, Christopher G., Eagleton, Aileen M., Nelson, Hosea M., Mirica, Katherine A.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 10-06-2024
• Subjects: Ammonia; chemical sensing; Chemical stimuli; Electrical resistivity; electronic modulation; gaseous molecules; Hydrogen sulfide; Magnetic properties; Metal-organic frameworks; Modulation; Multifunctional materials; Physicochemical properties; responsive material; Stimuli
• ISSN: 0044-8249; 1521-3757
• DOI: 10.1002/ange.202404290

Controlled modulation of electronic and magnetic properties in stimuli‐responsive materials provides valuable insights for the design of magnetoelectric or multiferroic devices. This paper demonstrates the modulation of electrical and magnetic properties of a semiconductive, paramagnetic metal−organic framework (MOF) Cu3(C6O6)2 with small gaseous molecules, NH3, H2S, and NO. This study merges chemiresistive and magnetic tests to reveal that the MOF undergoes simultaneous changes in electrical conductance and magnetization that are uniquely modulated by each gas. The features of response, including direction, magnitude, and kinetics, are modulated by the physicochemical properties of the gaseous molecules. This study advances the design of multifunctional materials capable of undergoing simultaneous changes in electrical and magnetic properties in response to chemical stimuli.
Exposure to gaseous molecules can induce characteristic electrical and magnetic property changes of a semiconductive metal–organic framework (MOF). The underlying interaction mechanism responsible for the electrical and magnetic modulation is found related to the intrinsic physical and chemical properties of the participating molecules which cause specific electronic and structural changes of the MOF.