Dimensional encapsulation of I-center dot center dot center dot I-2 center dot center dot center dot I- in an organic salt crystal matrix

Bis(trimethylammonium) hexane diiodide encapsulates iodine from solution and through a gas/solid reaction yielding in a predictable and controllable manner the selective formation of the rare polyiodide species I-center dot center dot center dot I-I center dot center dot center dot I-, which matches in length to the chosen dication.