Pyrene-Fullerene C60 Dyads as Light-Harvesting Antennas

Molecules

Víctor H. Ramos-Sánchez¹  David Chávez-Flores¹  Gerardo Zaragoza-Galán¹  Alejandro A. Camacho-Dávila¹  Bianca X. Valderrama²  Jesús Ortíz-Palacios²  Ernesto Rivera² 

[1] Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario 2, Apartado Postal 669, Chihuahua 31125, Mexico;Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México,Ciudad Universitaria, Mexico D.F. 04510, Mexico;

关键词: pyrene;    excimers;    fullerene;    fluorescence;    energy transfer;    photovoltaics;   

DOI  :  10.3390/molecules19010352

来源: DOAJ

【 摘 要 】

A series of pyrene-fullerene C60 dyads bearing pyrene units (PyFC12, PyFPy, Py2FC12 and PyFN) were synthesized and characterized. Their optical properties were studied by absorption and fluorescence spectroscopies. Dyads were designed in this way because the pyrene moeities act as light-harvesting molecules and are able to produce “monomer” (PyFC12) or excimer emission (PyFPy, Py2FC12 and PyFN). The fluorescence spectra ofthe dyads exhibited a significant decrease in the amount of pyrene monomer andexcimer emission, without the appearance of a new emission band due to fullerene C60.The pyrene fluorescence quenching was found to be almost quantitative, ranging between 96%–99% depending on the construct, which is an indication that energy transfer occurred from one of the excited pyrene species to the fullerene C60.

【 授权许可】

Unknown