The 1,3-dipolar cycloaddition of azomethine ylides to fullerene C60 was utilized to perform the synthesis of spiropyran-containing photochromic pyrrolidinofullerenes.

We prepared for the first time photoactive colloidal nanospheres consisting of hydrophobic CdSe/ZnS core−shell quantum dots encapsulated in an amphiphilic PMAT polymeric shell containing photochromic diarylethene DAE1 with stoichiometry of ∼6 dye molecules per single quantum dot. The UV-induced photoisomerization of DAE1 molecules results in the partial quenching of the quantum dot emission due to FRET from the quantum dot to DAE1 photoisomer with its absorption band spectrally overlapped with the quantum dot emission. The modulation of the quantum dot emission is reversible under cyclic UV−vis-induced open−closed photoisomerization of DAE1.

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Photocontrolled organic field-effect transistors (OFETs) containing a hybrid compound of fullerene C60 (n-semiconductor) with spiropyran (electrical conductivity photocontroller) as the active layer were fabricated for the first time.