90108-87-5Relevant academic research and scientific papers
Synthesis and non-linear optical properties of (alkyne)dicobalt octacarbonyl complexes and their substitution derivatives
Lee, In Su,Shin, Dong Mok,Yoon, Yeohoon,Shin, Seok Min,Chung, Young Keun
, p. 41 - 50 (2008/10/08)
A series of new donor-acceptor compounds of the form [(HC≡C-CH=CH-C6H4-X-p)Co2(CO) 4(L1)(L2)])] (2, X=Br, L1=L2=CO; 3, X=NO2, L1=L2=CO; 6, X=NO2, L1=CO, L2=PPh3; 7, X=NO2, L1=L2=PPh3; 8, X=NO2, L1=AsPh3, L2=PPh3), where X is a π-acceptor group and the (alkyne)Co2(CO)4(L1)(L2) moiety is a donor, has been synthesized. The different σ-donor/π-acceptor abilities of the ligands L1 and L2 allow tuning of the electronic and optical properties of complexes 2, 3 and 6-8: the hyperpolarizability values increase in the order 23678. Density functional calculations reveal that the absolute values of β do not agree with experimental results, but the general trends are consistent with experiments. The X-ray crystal structures of 2, 6, and 7 are reported.
