Concerted Diffusion of Molecular Clusters in a Molecular Sieve

David S. Sholl, Kristen S. Fichthorn

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


We show that attractive interactions between molecules adsorbed in molecular sieves play a vital role in the mechanisms and rates of intracrystalline diffusion. Over a wide temperature range, the single-file diffusion of CF4, SF6, and CCl4 in AlPO4- 5 is dominated by the diffusion of molecular clusters. SF6 and CCl4 clusters diffuse by concerted mechanisms involving all of the cluster’s molecules simultaneously. The activation energies, Ea, for these mechanisms are strongly size dependent and are lower than Ea for monomer diffusion.

Original languageEnglish (US)
Pages (from-to)3569-3572
Number of pages4
JournalPhysical review letters
Issue number19
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'Concerted Diffusion of Molecular Clusters in a Molecular Sieve'. Together they form a unique fingerprint.

Cite this