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- W2950402489 abstract "A series of new chiral donor-acceptor substituted mono- (1a,b), bi- (2a,b,f) and terthiophenes (3) as well as thienyl- and bithienylpyridinium salts 1d-f and 2i-k with various counterions has been synthesized. This class of thiophenes exhibit excellent molecular nonlinear optical properties such as second-order polarizabilities β or second-order hyperpolarizabilities γ. With respect to an application as nonlinear optical materials, some of these compounds have been investigated by Kurtz powder technique as well as by X-ray crystallographic analysis. The second-harmonic generation (SHG) powder efficiencies are measured at 1.064 μm and 1.3 μm with urea as reference. Furthermore, the influence of the chiral donors prolinol and methoxy-methylpyrrolidine in the thiophene derivatives as well as the variation of counterions in the pyridinium salts on the orientation of the chromophores in the crystalline lattice was investigated." @default.
- W2950402489 created "2019-06-27" @default.
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- W2950402489 date "1998-07-01" @default.
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- W2950402489 title "Highly polarizable chromophores for nonlinear optics: syntheses, structures and properties of donor-acceptor substituted thiophenes and oligothiophenes" @default.
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- W2950402489 doi "https://doi.org/10.1016/s0040-4020(98)00450-5" @default.
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