σ-π共轭聚合物光折变特征研究

Photorefractive Properties of a σ-π Conjugated Polymer

合成一种σ π共轭聚合物 poly(disilanylene 2 ,2′ bipyridine 5 ,5′ diyl)ruthenium (PDSBpy Ru) ,双光束耦合(2BC)、四波混频 (DFWM)及场致双折射实验等证明了该有机物的光导及光折变特性。由于铷化合物的金属与配位体间 (MLCT)电荷转移特性 ,使得该聚合物的光折变特性得以增强。实验测得双光束耦合增益系数为 30cm-1 ,四波混频实验测得光栅衍射率约为 1 0 %。

A kind of polymer poly(disilanylene 2,2′ bipyridine 5,5′ diyl)ruthenium (PDSBpy Ru) with a σ π alternating conjugated backbone was synthesized. The photorefractive effects were investigated by two beam coupling (2BC), degenerated four wave mixing (DFWM) and field induced orientation birefringence at 532 nm. This polymer shows an enhanced photoinduced metal to ligand charge transfer (MLCT) inside the ruthenium complex. The coupling coefficient and the diffraction efficiency are measured to be about 30 cm -1 and 10%, respectively.