Pyrene-Fullerene C60 Dyads as Light-Harvesting Antennas

Molecules

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

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

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

DOI  :  10.3390/molecules19010352

来源: mdpi

【 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 of the dyads exhibited a significant decrease in the amount of pyrene monomer and excimer 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】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.