Understanding the Chloride Affinity of Barbiturates for Anion Receptor Design
| Autor: | Gladis Laura Sosa, Andre Nicolai Petelski, Josefina Marquez, Silvana Carina Pamies, Nelida Maria Peruchena |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
COORDINATION MODES
02 engineering and technology 010402 general chemistry 01 natural sciences Chloride ANIONS Coordination complex purl.org/becyt/ford/1 [https] chemistry.chemical_compound Amide medicine purl.org/becyt/ford/1.4 [https] Physical and Theoretical Chemistry Methylene chemistry.chemical_classification Barbituric acid Hydrogen bond DENSITY FUNCTIONAL CALCULATIONS Interaction energy 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences RECEPTORS Crystallography chemistry Covalent bond HYDROGEN BONDS 0210 nano-technology medicine.drug |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1002/cphc.202100008 |
| Popis: | Due to their potential binding sites, barbituric acid (BA) and its derivatives have been used in metal coordination chemistry. Yet their abilities to recognize anions remain unexplored. In this work, we were able to identify four structural features of barbiturates that are responsible for a certain anion affinity. The set of coordination interactions can be finely tuned with covalent decorations at the methylene group. DFT-D computations at the BLYP-D3(BJ)/aug-cc-pVDZ level of theory show that the C−H bond is as effective as the N−H bond to coordinate chloride. An analysis of the electron charge density at the C−H⋅⋅⋅Cl− and N−H⋅⋅⋅Cl− bond critical points elucidates their similarities in covalent character. Our results reveal that the special acidity of the C−H bond shows up when the methylene group moves out of the ring plane and it is mainly governed by the orbital interaction energy. The amide and carboxyl groups are the best choices to coordinate the ion when they act together with the C−H bond. We finally show how can we use this information to rationally improve the recognition capability of a small cage-like complex that is able to coordinate NaCl. Fil: Petelski, Andre Nicolai. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Química Básica y Aplicada del Nordeste Argentino. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Química Básica y Aplicada del Nordeste Argentino; Argentina Fil: Marquez, Josefina. Universidad Tecnológica Nacional. Facultad Regional Resistencia. Departamento de Ingeniería Química. Laboratorio de Química Teórica y Experimental; Argentina Fil: Pamies, Silvana Carina. Universidad Tecnológica Nacional. Facultad Regional Resistencia. Departamento de Ingeniería Química. Laboratorio de Química Teórica y Experimental; Argentina Fil: Sosa, Gladis Laura. Universidad Tecnológica Nacional. Facultad Regional Resistencia. Departamento de Ingeniería Química. Laboratorio de Química Teórica y Experimental; Argentina Fil: Peruchena, Nelida Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Química Básica y Aplicada del Nordeste Argentino. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Química Básica y Aplicada del Nordeste Argentino; Argentina |
| Databáze: | OpenAIRE |
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