Pulsed Gradient Spin Echo (PGSE) Diffusion Measurements as a Tool for the Elucidation of a New Type of Hydrogen-Bonded Bicapsular Aggregate

Autor:	Eloisa Martinez-Viviente, Mateo Alajarin, Raul-Angel Orenes, Aurelia Pastor, Paul S. Pregosin
Rok vydání:	2006
Předmět:	Tris Hydrogen Hydrogen bond Diffusion Organic Chemistry Analytical chemistry chemistry.chemical_element General Chemistry Nuclear magnetic resonance spectroscopy Catalysis chemistry.chemical_compound chemistry Spin echo Physical chemistry Amine gas treating Self-assembly
Zdroj:	Chemistry - A European Journal. 12:877-886
ISSN:	1521-3765 0947-6539
DOI:	10.1002/chem.200500021
Popis:	Compounds formed by linking two tris(ureidobenzyl)amine modules with a hexamethylene tether are described. These compounds self-assemble to form bicapsular aggregates featuring two rings of six hydrogen-bonded ureas. (1)H and (1)H/(1)H ROESY NMR spectroscopy, together with pulsed gradient spin echo (PGSE) NMR diffusion measurements, have been used to characterize the dimers in solution. The results have been compared with energy-minimized structures. The new compounds are kinetically stable on the NMR timescale, and their thermodynamic stabilities are comparable to other capsular aggregates derived from tris(ureidobenzyl)amines.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::225dce12f5b7e772c39c9016f0f9357c https://doi.org/10.1002/chem.200500021 Zobrazit plný text záznamu Plný text