Unveiling the nature of supramolecular crown ether–C60 interactions
A series of exTTF-(crown ether)2 receptors, designed to host C60, has been prepared. The size of the crown ether and the nature of the heteroatoms have been systematically changed to fine tune the association constants, which were determined by a number of complementary spectroscopic techniques. Ele...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/35100 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/35100 |
| Access Level: | acceso abierto |
| Palabra clave: | 547 Absorption spectroscopy Charge transfer Ethers Excited states Ground state Ligands Química orgánica (Química) 2306 Química Orgánica |
| Sumario: | A series of exTTF-(crown ether)2 receptors, designed to host C60, has been prepared. The size of the crown ether and the nature of the heteroatoms have been systematically changed to fine tune the association constants, which were determined by a number of complementary spectroscopic techniques. Electrochemical measurements and transient absorption spectroscopy assisted in corroborating charge transfer in the ground state and in the excited state, leading to the formation of radical ion pairs featuring lifetimes in the range from 12 to 21 ps. To rationalize the nature of the exTTF-(crown ether)2$C60 stabilizing interactions, theoretical calculations have been carried out, suggesting a synergetic interplay of donor–acceptor, p–p, n–p and CH/p interactions, which is the basis for theaffinity of our novel receptors towards C60. |
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