报告题目

Platinum(II) Terdentate or Diimine Complexes as Broadband Nonlinear Absorbing Materials

报 告 人

孙文芳 教授，North Dakota State University,USA

报告地点

物理楼 北236

报告时间

2012年6月12日 下午3:00-5:00

联 系 人

肖立新（67290）

报告摘要

Organic materials with broadband nonlinear absorption in the visible to the near-IR region are desired for a variety of photonic device applications. Platinum terdentate or diimine complexes are promising broadband excited-state absorbers in the visible to the near-IR region. However, due to the very weak ground-state absorption of many reported Pt(II) terdentate or diimine complexes in the near-IR region, it is not possible to populate the excited state via one-photon absorption in this region. To overcome this disadvantage, we designed and synthesized several series of Pt(II) terdentate or diimine complexes containing fluorenyl component either on the terdentate ligand or on the acetylide ligands to increase the two-photon absorption of these complexes in the near-IR region. In such a case, we can access the excited state via two-photon absorption. Combination of two-photon absorption and excited-state absorption not only expands the nonlinear absorption spectral region but also enhances the nonlinear transmission performance in the near-IR region.