Designs and Syntheses of Donor-acceptor-linked Platinum Complexes for Efficient Generation of Spin-controlled Charge Separation

设计并合成了一种以磷光铂配合物为三重态敏化剂的光诱导电子转移体系。为了有效地利用光能，我们修改了铂络合物系统，以更强地吸收可见光。我们还合成了一种在电极上具有吸附功能团的铂配合物体系。结果总结如下。1)我们成功地合成了一个以苯基乙炔单元为连接单元，同时连接电子给体和电子受体的铂配合物。在瞬态吸收光谱中，配合物的光激发态呈现长寿命的电荷分离态（约4μs）。2)我们成功地合成了硼-二吡咯亚甲基铂配合物。它们的瞬态吸收光谱显示出稍长寿命的电荷分离态。3)我们还成功地合成了一个具有末端硫代乙酰基的供体-受体连接的铂配合物。

A photo-induced electron transfer system using a phosphorescent platinum complex as a triplet-sensitizer was newly designed and synthesized. For the efficient use of light energy, we modify the platinum complex systems to more strongly absorb visible light. We also synthesized a platinum complex system having adsorptive functional group on an electrode. The results are summarized as follows. 1) We succeeded in the syntheses of a platinum complex linked with the phenyl acetylene unit linked with an electron donor and an electron acceptor. The excitation of the complex showed a long-lived charge separated state(ca 4μs) by photo-irradiation in the transient absorption spectra. 2) We succeeded to synthesize boron-dipyrromethene-containing platinum complexes. Their transient absorption spectra showed slightly long-lived charge separated states. 3) We also succeeded in the synthesis of a donor-acceptor-linked platinum complex possessing a terminal thioacetyl group.