1 research outputs found
2,7-Fluorenediyl-Bridged Complexes Containing Electroactive āFe(Ī·<sup>5</sup>āC<sub>5</sub>Me<sub>5</sub>)(Īŗ<sup>2</sup>ādppe)Cī¼Cāā End Groups: Molecular Wires and Remarkable Nonlinear Electrochromes
No full textThe 2,7-fluorenyl-bridged FeĀ(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe)Ā[Cī¼CĀ(2,7-C<sub>13</sub>H<sub>6</sub>Bu<sub>2</sub>)ĀCī¼C]ĀFeĀ(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe) (<b>1a</b>), its
extended analogue FeĀ(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe)Ā[Cī¼CĀ(1,4-C<sub>6</sub>H<sub>4</sub>)ĀCī¼CĀ(2,7-C<sub>13</sub>H<sub>6</sub>Bu<sub>2</sub>)ĀCī¼CĀ(1,4-C<sub>6</sub>H<sub>4</sub>)ĀCī¼C]Ā(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe)Fe (<b>1b</b>), and
the corresponding mononuclear complexes FeĀ(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe)Ā[Cī¼CĀ(2-C<sub>13</sub>H<sub>7</sub>Bu<sub>2</sub>)] (<b>2a</b>) and FeĀ(Ī·<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Ā(Īŗ<sup>2</sup>-dppe)Ā[Cī¼CĀ(1,4-C<sub>6</sub>H<sub>4</sub>)ĀCī¼CĀ(2-C<sub>13</sub>H<sub>7</sub>Bu<sub>2</sub>)] (<b>2b</b>), which model half of these molecules,
have been synthesized and characterized in their various redox states.
The molecular wire characteristics of the dinuclear complexes were
examined in their mixed-valent states, with progression from <b>1a</b>[PF<sub>6</sub>] to <b>1b</b>[PF<sub>6</sub>] resulting
in a sharp decrease in electronic coupling. The cubic nonlinear optical
properties of these species were investigated over the visible and
near-IR range, a particular emphasis being placed on their multiphoton
absorption properties; the complexes are shown to function as redox-switchable
nonlinear chromophores at selected wavelengths, and the more extended
derivatives are shown to exhibit the more promising NLO performance
