Crystal structure of the inorganic-organic hybrid material bis(N,Ndimethyl- 1,3-diammoniopropane) hexachloridorhodate(III) chloride, [(CH3)2NH(CH2)3NH3]2[RhCl6]Cl, C10H32Cl7N4Rh

Bujak, Maciej; Frank, Walter

doi:10.1515/ncrs-2014-0148

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrophilic, short-chain (C2–C3) diamines with varying N-methylation were selected to probe both steric and thermodynamic effects, owing to variations in p K a values, as well as the presence of different numbers of hydrogen atoms available for hydrogen bonding. , These diamines are also well-known for their proficiency to form cocrystals, , indicating a high affinity to form stable associations through hydrogen bonding. Our selections of the diamines for SAPO syntheses were made with respect to the combinations of tertiary and primary amine groups attached to the carbon chains, thus giving either symmetric or asymmetric configurations.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-Bonded Water-Aminium Assemblies for Synthesis of Zeotypes with Ordered Heteroatoms

et al. 2022

View full text Add to dashboard Cite

Water plays a central role in the crystallization of a variety of organic, inorganic, biological, and hybrid materials. This is also true for zeolites and zeolite-like materials, an important class of industrial catalysts and adsorbents. Water is always present during their hydrothermal synthesis, either with or without organic species as structure-directing agents. Apart from its role as a solvent or a catalyst, structure direction by water in zeolite synthesis has never been clearly elucidated. Here, we report the crystallization of phosphate-based molecular sieves using rationally designed, hydrogen-bonded water-aminium assemblies, resulting in molecular sieves exhibiting the crystallographic ordering of heteroatoms. We demonstrate that a 1:1 assembly of water and diprotonated N,N-dimethyl-1,2-ethanediamine acts as a structure-directing agent in the synthesis of a silicoaluminophosphate material with phillipsite (PHI) topology, using SMARTER crystallography, which combines single-crystal X-ray diffraction and nuclear magnetic resonance spectroscopy, as well as ab initio molecular dynamics simulations. The molecular arrangement of the hydrogen-bonded assembly matches well with the shape and size of subunits in the PHI structure, and their charge distributions result in the strict ordering of framework tetrahedral atoms. This concept of structure direction by water-containing supramolecular assemblies should be applicable to the synthesis of many classes of porous materials.

show abstract