Water and oxoanion encapsulation chemistry in a 1H-pyrazole azacryptand
| Autor: | Kari Rissanen, Enrique García-España, Salvador Blasco, Alberto Lopera, Santiago García-Granda, M. Paz Clares, Javier Pitarch-Jarque |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Generalitat Valenciana, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España) |
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
Chemistry Hydrogen bond Cryptand Protonation 02 engineering and technology General Chemistry Pyrazole 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Perchlorate chemistry.chemical_compound Polymer chemistry Materials Chemistry Amine gas treating 0210 nano-technology Anion binding |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1369-9261 1144-0546 2016-7849 |
| Popis: | Anion complexes of the cryptand built with the tripodal amine tris(2-aminoethyl)amine, known as tren, with water and several oxoanions of biological and environmental interest (nitrate, sulfate, phosphate, perchlorate and arsenate) have been crystallized from aqueous solution and resolved with single-crystal X-ray diffraction. All crystals show guest species encapsulated in the interior of the cavity as well as, in some cases, sitting in the grooves defined by the arms of the macrocycle. Hydrogen bonding and electrostatic interactions play a major role in anion binding to the host. The macrocycle is able to encapsulate anions in a wide range of protonation degrees. Solution studies have been carried out to show that those interactions happen also in solution in addition to the solid state. The results show that the receptor binds consistently to the ligand in a wide range protonation degrees. Financial support by the Spanish Ministerio de Economía y Competitividad (projects CTQ2016-78499-C6-1-R, Unidad de Excelencia MDM 2015-0038 and CTQ2017-90852-REDC) and Generalitat Valenciana (Project PROMETEOII2015-002) is gratefully acknowledged. S. B. thanks MINECO for a Juan de la Cierva postdoctoral grant. |
| Databáze: | OpenAIRE |
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