Shedding Light on a Cyclic Molecule with a Twist (2 of 2) (IMAGE)
Caption
Figure 2.
a) The time-resolved electron paramagnetic resonance (TREPR) spectrum for the excited triplet state obtained from [28] hexaphyrin observed at several delay times. A and E show the signals (electron spin polarization) based on the absorption and release of microwaves. On the left, electrons are excited by depolarized light. B 0 and ( L ) show the light parallel to the external magnetic field and perpendicular to the external magnetic field.
b) The distribution of the unpaired orbitals (π and π*) that express the directions of the main axes (X,Y,Z) for interaction between the unpaired electric dipoles shown by TREPR spectrum analysis.
c) The electrons in the triplet charge-transfer state. Parallel triplet spin configurations are shown in the Mobius strip. This study showed that the angular momentum change between the electron orbitals localized and bisecting each other leads to a deactivation to the non-magnetic ground state, and is a new marker for antiaromaticity.
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Kobe University
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