Gao K, Liu XJ, Liu DS, Xie SJ. Reverse polarization in charged π-conjugated oligomers.
J Chem Phys 2005;
123:234702. [PMID:
16392939 DOI:
10.1063/1.2136156]
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Abstract
Single-photon excitation in a charged pi-conjugated oligomer is studied theoretically. An apparent reverse polarization is obtained through single-photon excitation, which is different from that obtained through a double-photon excitation. The polarizability is calculated and it is found that a maximum reverse polarization will appear at a suitable conjugation length. In addition, we indicate that the reverse polarization is a nonlinear behavior with the induced electric field. Effects of nondegenerate confinement and interchain interactions on the reverse polarization are also discussed.
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