Remarkable stability of C₆₀˙^–in micelles

Abstract

We show that the lifetime of C6*+ photochemically generated in a micellar medium is unusually long; of the order of minutes.The formation c60'-by photoinduced electron transfer to triplet C60 has been demonstrated using a range of electron donors including aromatic amines. Early work by Hochstrasser and coworkers indicated that in non-polar hydrocarbon solvents the radical ion pair generated by electron transfer does not separate but rather undergoes back-electron transfer. The lifetime of the radical ion pair formed by the reaction of triplet C60 with dimethylaniline in toluene was found to be < 1 118.2 Using more

Photophysical Properties of C60 Colloids Suspended in Water with Triton X-100 Surfactant: Excited-State Properties with Femtosecond Resolution

“…This long tail of transient absorption might be due to formation of the triplet excited state or formation of reduced C 60 (C 60 •-) in a self-quenching reaction. 87 The spectrum at this probe delay is not consistent with triplet C 60 , but the weak absorption signal was near the limit of detection. Because our apparatus was unable to measure beyond 800 nm, we were unable to confirm a C 60 •-absorption feature at 1070 nm.…”

“…87 The spectrum at this probe delay is not consistent with triplet C 60 , but the weak absorption signal was near the limit of detection. Because our apparatus was unable to measure beyond 800 nm, we were unable to confirm a C 60…”

Effect of addition of dendritic C60 amphiphiles on the structure of cationic surfactant solutions

“…However, their aggregation behavior in aqueous solutions has not been well described in detail yet and imaging studies were especially rare [31]. It should be emphasized that the investigation of their aggregation behavior in aqueous solutions not only is of great fundamental interest from a viewpoint of colloid and interface science but also is very important for their potential applications in material and life sciences because aggregate formation can significantly alter the lifetime of the triplet excited states of the C 60 core [32][33][34][35][36]. As can be seen from Fig.…”

Electron Transfer Studies in C78 (C2v‘), C76 (D2), C70 (D5h), and C60 (Ih) Surfactant Aqueous Solutions

“…A very promising further possibility in support of solubilization is micellarization by surfactants. − The amphiphilic structure of the surfactant, a hydrophobic tail and a hydrophilic head group, is advantageous to cap and, thus, solubilize pristine C 60 and various monofunctionalized C 60 derivatives. In contrast to supramolecular hosts, Triton X-100 (reduced form) and cetyltrimethylammonium chloride are (i) redox-inactive substrates and (ii) should not exert any size limitation.…”