Nickel Polymerization Catalysts with Ylide Steering Ligands - Late Transition Metal Polymerization Catalysis - page 24

Fig. 1.10 POLPAC: on/off-state absorbances for polarized light.

perpolarizabilities). On the macroscopic level the corresponding terms are the sus-
ceptibilities. The third order susceptibility

(3) gives rise to an intensity-dependent
nonlinear refractive index. This material property will become increasingly impor-
tant in the upcoming “information age”. Electronics will be substituted by photo-
nics in order to save time and energy. Copper wires will be substituted by optical
fibers, electrical signals by optical signals, and transistors by nonlinear optical
(NLO) devices. Large amounts of these devices will be needed for optical commu-
nication. NLO polymers are thus needed to control the propagating properties of
light, polymers that have high NLO effects, high stability, easy processibility and
low material costs.
Therefore, the so-far developed catalytic instruments were tested within this fo-
cus of advanced material properties. A series of different MATPAC polymers of
different color were synthesized with different catalysts and the

(3) values deter-
mined in solution. A blue PVAPAC solution with an absorption maximum at
650 nm exhibited an excellent third order susceptibility

(3) of 2.1 10 -13 normal-

ized to 1 g PAC per liter of solution.

1.8
References

1 K. A. Ostoja Starzewski, H. tom Dieck,

H. Bock, J. Organometal. Chem. 1974 , 65 ,
311.

3 K. A. Ostoja Starzewski, W. Richter,

H. Schmidbaur, Chem. Ber. 1976 , 109 ,
473.

K. A. Ostoja Starzewski, H. Bock, H.
tom Dieck, Angew. Chem . 1975 , 87 , 197;
Angew. Chem. , Int. Ed. Engl. 1975 , 14 ,
173.

K. A. Ostoja Starzewski, H. Bock, J.
Am. Chem. Soc. 1976 , 98 , 8486.

2 4

K. A. Ostoja Starzewski, H. tom Dieck,
Inorg. Chem . 1979 , 18 , 3307.

5