Larger Spontaneous Polarization Ferroelectric Inorganic−Organic Hybrids: PbI3∞ Chains Directed Organic Cations Aggregation to Kagomé-Shaped Tubular Architecture

Four isostructural inorganic−organic hybrid ferroelectric compounds, assembled from achiral 3-R-benzylidene-1-aminopyridiniums (R = NO2, Br, Cl, or F for 1−4, respectively) and PbI3− anions with the chiral Kagomé-shaped tubular aggregating architecture, show larger spontaneous polarizations.