Medveď, Miroslav, 1971- Enhancement of the second-order NLO responses of boron-nitrogen oligomers by copolymerization with polyyne = Zosilnenie NLO odozvy oligomérov bóru a dusíka kopolymerizáciou s polyínmi / Miroslav Medveď ... [et al.]. -- The enhancement of the static electronic second-order NLO properties of the linear boron-nitrogen chains by copolymerization with polyyne that is related mainly to the changes in the bond length alternation (BLA) parameter has been investigated at the HF and MP2 levels using the 6-311G(d,p) and 6-311+G(d,p) basis sets. The non-zero BLA parameter combined with ununiform electron distribution along the chain yealds a unit cell asymmetry necessary for large second-order NLO responses. Alternance of the single and triple bonds brings an efficient electron delocalization resulting in large polymeric electronic dipole polarizability (186 +- 1 a.u. per unit cell). The unit cell asymmetry and large delocalization lead to sizeable longitudinal first hyperpolarizability (5850 +- 100 a.u. per unit cell)

In Journal of Molecular Structure : THEOCHEM. -- Amsterdam : Elsevier B.V., 2009. -- ISSN 0166-1280. -- ISSN 1872-7999. -- Vol. 901, no. 1-3 (2009), pp. 194-201

1. nonlinear optical properties 2. copolymerization 3. electron delocalization 4. unit cell asymmetry 5. electron correlation

I. Budzák, Šimon, 1982-
II. Jacquemin, Denis
III. Perpéte, Eric A.
IV. Journal of Molecular Structure : THEOCHEM. -- Vol. 901, no. 1-3 (2009), pp. 194-201

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