Fig. 3: Hierarchical self-assembly of DPPE-1 with well-defined primary, secondary, tertiary, and quaternary structures. | Nature Communications

Fig. 3: Hierarchical self-assembly of DPPE-1 with well-defined primary, secondary, tertiary, and quaternary structures.

From: A promising perovskite primary explosive

Fig. 3

a Primary structures of the metaperiodate IO4− anion and H2dabco2+. b Secondary structural unit (Octa-small) composed of Na+ and IO4−; based on the coordination bond (Na···O) and Coulombic forces (Na + /IO4−). c Tertiary structural unit (Octa-large) assembled by NH4+, for which a twisted octahedral configuration (Octa-small) occurs through interionic interactions (hydrogen bonding and Coulombic forces). d Unfilled cubic framework. e Cubic framework filled with H2dabco2+ cations. f Hydrogen bonds between the four twisted octahedral configurations (Octa-small) and the H2dabco2+ cations.

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