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Gray’s model of a supramolecular assembly in a representative asphaltene aggregate. Associations between molecules are color-coded in (A) the molecular depiction and (B) the space-filling version: acid–base interactions and hydrogen bonding (blue), metal coordination complex (red), a hydrophobic pocket (orange), π–π stacking (face-to-face dark green; within a clathrate containing toluene, light green) [56].
