Work

Conversion Between 2‐ and 3‐Dimensional Halogen‐Bonded Networks Formed From a Single N ‐Oxide/Iodoalkyne Building Block

Year: 2026

Type: article

Abstract: Despite their promise as porous supramolecular materials, permanently porous halogen-bonded frameworks have not been realized, and progress in the field is limited by a lack of understanding of what happens when these materials are activated via solvent exchange or under vacuum. In the current work, a single building block bearing complementary iodoalkyne halogen bond donors and pyridine-N-oxide acceptors is described. Crystallization is solvent dependent, with initial experiments giving networks containing unwanted hydrogen bonding interactions between components. Subsequent optimization of conditions enabled the generation of a 3D network assembled by only halogen bonds. Upon solvent exchange, the 3D network undergoes an unprecedented single-crystal transformation to a new 2D phase. Synchrotron far-infrared spectroscopy was employed to identify diagnostic signals for the phase transition. These results add to our understanding of the dynamic nature of halogen-bonded network materials.

Source: Chemistry - A European Journal

DOI: 10.1002/chem.71010

Authors: Jordan N. Smith, Courtney Ennis, Huan V. Doan, Valeska P. Ting, Nicholas G. White

Institutions: Australian National University, University of Otago, University of Bristol

Language: English

Topic: Crystallography and molecular interactions

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,640

Funder: Australian Research Council