2-naphthol lattice diffusion at infinite dilution in naphthalene single crystals—I: Diffusion tensor—influence of the purity of the naphthalene

Bonpunt, L.; Dautant, Alain; Loumaid, Abdellah; Faure, F

doi:10.1016/0022-3697(89)90056-5

Cited by 3 publications

(1 citation statement)

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“…A third possibility is that anisotropic diffusion within the nanorods helps them remain intact. The rate of molecular diffusion within a crystal is known to depend on the crystal axis, , and it is possible that the crystal orientation of 9-MA in the rod, with only the ends exposed to TCNB, favors diffusion along a slow axis, which would lead to more gradual conversion and less fracture. Again, our results on the free rods suggest that even without constraints on the TCNB access to the rods, the rods can incorporate the TCNB and remain intact, albeit with less uniform reaction.…”

Section: Resultsmentioning

confidence: 99%

Formation of Cocrystal Nanorods by Solid-State Reaction of Tetracyanobenzene in 9-Methylanthracene Molecular Crystal Nanorods

Al‐Kaysi

Müller

Frisbee

et al. 2009

Crystal Growth & Design

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The reaction of single-component molecular crystal nanorods with a second species to form cocrystal nanorods is described. Single-component crystalline nanorods, composed of 9-methylanthracene (9-MA), are grown in a porous anodic aluminum oxide template. These templated rods are then exposed to a suspension of 1,2,4,5-tetracyanobenzene (TCNB) in water, which slowly diffuses into the 9-MA rods over the course of days. The two species form a 1:1 charge-transfer complex within the rods, which are transformed from crystalline 9-MA into cocrystalline 9-MA/TCNB. The cocrystal nanorods are characterized by electron microscopy, X-ray diffraction, and optical spectroscopy, confirming their highly crystalline structure and the formation of the charge-transfer complex. Attempts to grow cocrystal nanorods directly from a mixed solution were unsuccessful, as were attempts to recreate the single crystal-to-crystal reaction in macroscopic crystals. This work demonstrates how organic nanostructures can support structure-preserving chemical transformations that are impossible in larger crystals.

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Section: Resultsmentioning

confidence: 99%