An evidence of electron donor behavior of single-walled carbon nanotube in photo-induced electron transfer

Abstract

The electron transfer reaction between C₆₀ and SWCNTs in D₂O was investigated. Repeated laser irradiation of water-soluble C₆₀ encapsulated in γ-cyclodextrin and SWCNTs with carboxymethylcellulose dispersed in D₂O resulted in the accumulation of C₆₀ anion radicals and a decrease in the E₁₁ absorption band of SWCNTs, strongly suggesting electron transfer between C₆₀ and SWCNTs. Transient absorption techniques revealed that this electron transfer occurred through the excited triplet of C₆₀.