A Dependence on the Petal Number of the Static and Dynamic First Hyperpolarizability for Electride Molecules: Many-Petal-Shaped Li-Doped Cyclic Polyamines.

Doping Li atom into higher flexible cyclic polyamines with many amine unit petals (ethyleneimine) forms the n-petal-shaped Li-doped cyclic polyamines (n= 3−5). Three structures, referred to as three-petal-shaped Li-[9]aneN3, four-petal-shaped Li-[12]aneN4, and five-petal-shaped Li-[15]aneN5, with all-real frequencies are obtained at the MP2/6-31+G(d) level. Because the chemical doping with Li and the deformation of the complexant produce more diffuse excess electron, the three molecules with the excess electrons exhibit considerably large static first hyperpolarizabilities (β0) at the MP2 level. Additionally, the β0value increases with increasing the petal number (n) as follows: 52282 (n= 3) < 65505 (n= 4) < 127617 au (n= 5). This shows a new complexant effect on β0, that is, a dependence on the petal number (n) of β0owing to the flexibility of the complexants increasing with the petal number. [ABSTRACT FROM AUTHOR]