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Second-order nonlinear polarizabilities enhanced

Thiophene-containing D-A-substituted jt-systems have been extensively studied in relation to their application in organic electronics. Nonlinear optical (NLO) measurements of such push-pull systems showed enhanced second-order polarizabilities (P) compared with the phenyl counterparts. These increased nonlinearities were attributed to the partial decrease in the aromatic character and increased n-overlap between the thiophene units. Various electron donors (-NR2, -OMe, -SMe) and acceptors (-NO2, -CHO, -S02Me, -CN) have been introduced into the oligothiophene backbone, not only to study the electron and energy transfer processes, but also because of their prospects as active molecules in electronic devices. The... [Pg.24]

See other pages where Second-order nonlinear polarizabilities enhanced is mentioned: [Pg.563]    [Pg.192]    [Pg.631]    [Pg.27]    [Pg.470]    [Pg.1029]    [Pg.6]    [Pg.26]    [Pg.170]    [Pg.631]    [Pg.74]   
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