Solvent-induced optical properties of C60

The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents

“…These bands corresponded to the electronic transitions of π → π * and n → π * . This result was nearly the same as that produced by Zhang et al [23] and Törpe and Belton [25], who found that the main absorption bands of C 60 in toluene and o-xylene occurred at a wavelength of ~407 nm in a sharp feature attributed to the lowest energy 1 T 1u state [67], followed by a broad absorption band in the range of 430 to 650 nm [23,25]. This broad band was attributed to multiple vibronic excitations activated through an HT coupling orbital to the JT distorted orbital at a higher level, assigned as forbidden singlet-singlet transitions [26].…”

“…The experimental fluorescence features of C 60 in toluene or xylene in the wavelength of 430 to 900 nm, as shown in both of Figure 8(e) to (f), were almost the same with the C 60 fluorescence spectra in benzene and toluene reported in pioneering studies. Zhang et al reported an intense emission peak at 440 nm and a broad peak in the region of 600 to 800 nm [23,66]. The broad emission in the region of 600 to 800 nm was also reported by Palewska et al [70] and Zhao et al [84].…”

“…The optical properties of fullerene have been widely investigated in different solvents by spectroscopy, and the published studies on the comparisons of C 60 optical properties have agreed on solvents with significant different polarity, including toluene [21][22][23][24], o-xylene, dichlorobenzene (DCB) [25], hexane [22,26], cyclohexane [27], methylcyclohexane, CS 2 [28], acetonitrile [23], alkanes [29], and water [30][31][32]. However, the interpretation of the findings has revealed unpredictable results due to the unknown dynamic phenomenon caused by inter and intramolecular interactions.…”