Asymmetric unit cell polymers with large first hyperpolarizabilities

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Large first hyperpolarizabilities (β) can result from the combination of donor and acceptor groups separated by a conjugated linker but also from the use of asymmetric unit cell polymers. Quantum chemistry methods including electron correlation effects are used to assess the chain length dependence of β of polymethineimine (PMI), a prototype of this kind of polymers. The evolution of β of PMI upon modification of the bond length alternation is investigated. It is demonstrated that PMI presents a very large β in comparison with usual push-pull molecules.

Original languageEnglish
Pages (from-to)490-491
Number of pages2
JournalSynthetic Metals
Issue number1
Publication statusPublished - 1 May 1999


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