Hydrogen-Bonded Frameworks Assembled Using Amidinium···Phosphonate and Phosphonate···Phosphonate Interactions
Year: 2024
Type: article
Abstract: We report the synthesis of hydrogen-bonded frameworks prepared from guanidinium, bis-amidinium or tetra-amidinium cations, and diphosphonate or tetraphosphonate anions. The frameworks are assembled by both charge-assisted amidinium⋅⋅⋅phosphonate and anti-electrostatic phosphonate⋅⋅⋅phosphonate hydrogen bonds, of which the phosphonate⋅⋅⋅phosphonate interactions are notably shorter. Frameworks prepared from the tetrahedral tetraphosphonate building block contain relatively large water-filled channels, but lose crystallinity upon drying. The crystal structure of a guanidinium⋅⋅⋅diphosphonate salt has an unusual structure related to classic Ward guanidinium⋅⋅⋅sulfonate frameworks but with an additional cation/solvent layer. This material includes toluene guests, which are held strongly within the crystal lattice.
Source: Crystal Growth & Design
Authors: Phonlakrit Muang-Non, Nicholas G. White
Institution: Australian National University
Language: English
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
Funder: Australian Research Council
OpenAlex ID: W4402504524