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Unveiling the nature of supramolecular crown ether–C60 interactions

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Moreira, Luis y Calbo, Joaquín y Krick Calderón, Rafael M. y Santos, José y Illescas, Beatriz M. y Aragó, Juan y Nierengarten, Jean-Françoise y Guldi, Dirk M. y Orti, Enrique y Martín, Nazario (2015) Unveiling the nature of supramolecular crown ether–C60 interactions. Chemical Science, 6 . pp. 4426-4432.

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URL Oficial: http://pubs.rsc.org/en/content/articlepdf/2015/sc/c5sc00850f



Resumen

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.


Tipo de documento:Artículo
Palabras clave:Absorption spectroscopy; Charge transfer; Ethers; Excited states; Ground state; Ligands
Materias:Ciencias > Química > Química orgánica
Código ID:36157
Depositado:07 Mar 2016 10:31
Última Modificación:07 Mar 2016 13:28

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