biostudies-literatureHuang ZOffice of ScienceNational Institutes of HealthNIH HHSe17774https://www.ebi.ac.uk/biostudies/studies/S-EPMC12921328biostudies-literatureUnknown38(11)Solid materials with a high dielectric constant have a wide range of applications in the energy storage field. In this research, an imidazolium-based zwitterion is designed, synthesized, and confirmed to have a plastic crystal phase based on the following experimental and computational evidence: (i) the presence of long-range order with weak intermolecular forces and competing attractive-repulsive interactions along different crystallographic directions; (ii) the observation of more than one endotherm on heating including a solid-solid phase transition at T_s-s = -26 °C and melting of the plastic crystal at T_m = 72°C; (iii) a low entropy of fusion at melting (2.1 JK^-1mol^-1); (iv) a strongly anisotropic morphology; (v) relatively fast dynamics origAdvanced materials (Deerfield Beach, Fla.)A Solid State Zwitterionic Plastic Crystal With High Static Dielectric Constant.PMC12921328NERSC1S10RR023439-011S10OD028589-01BES-ERCAPm43051S10RR023439‐01BES‐ERCAPm43051S10OD028589‐01Corvo TOLiu YUddin ASaito TCooper VRHuang ZColby RHLehmann MLfalseA Solid State Zwitterionic Plastic Crystal With High Static Dielectric Constant.Solid materials with a high dielectric constant have a wide range of applications in the energy storage field. In this research, an imidazolium-based zwitterion is designed, synthesized, and confirmed to have a plastic crystal phase based on the following experimental and computational evidence: (i) the presence of long-range order with weak intermolecular forces and competing attractive-repulsive interactions along different crystallographic directions; (ii) the observation of more than one endotherm on heating including a solid-solid phase transition at T_s-s = -26 °C and melting of the plastic crystal at T_m = 72°C; (iii) a low entropy of fusion at melting (2.1 JK^-1mol^-1); (iv) a strongly anisotropic morphology; (v) relatively fast dynamics orig2026-01-01T00:00:00Z2026 Feb2026-07-16T12:34:15.854Z2026-07-09T10:55:45.71ZS-EPMC129213284154616410.1002/adma.202517774