A time resolved EPR (TR-EPR) spectrum of a radical-triplet pair (RTP) in the quartet excited state has been recorded by irradiating with visible laser light a solution of a 60fullerene-crown ether conjugate and an ammonium aminoxyl radical; this is the first direct observation of a RTP in liquid solution for a stable host-guest complex between a macrocyclic ligand bearing a triplet precursor and an aminoxyl ammonium cation.
Time resolved EPR characterisation of radical-triplet pairs formed by host-guest interaction of photoexcited C60-crown ether with an ammonium aminoxyl in liquid solution
SARTORI, ELENA;TOFFOLETTI, ANTONIO;CORVAJA, CARLO;MAGGINI, MICHELE;SCORRANO, GIANFRANCO
2001
Abstract
A time resolved EPR (TR-EPR) spectrum of a radical-triplet pair (RTP) in the quartet excited state has been recorded by irradiating with visible laser light a solution of a 60fullerene-crown ether conjugate and an ammonium aminoxyl radical; this is the first direct observation of a RTP in liquid solution for a stable host-guest complex between a macrocyclic ligand bearing a triplet precursor and an aminoxyl ammonium cation.
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