报告题目：Heteroleptic Cationic Iridium(III) Complexes as Nonlinear Absorbing Materials

报告人：Professor Wenfang Sun

Department of Chemistry and Biochemistry,

North Dakota State University, USA

报告时间：2014年8月28日(星期四)下午15:30

报告地点：无机/超分子楼 楼 A401会议室

报告人简介：

EDUCATION

Ph.D. Organic Chemistry, Institute of Photographic Chemistry, Chinese Academy of Sciences, Beijing, China, July 1995

Ph.D. Dissertation: Asymmetric Pentaazadentate Porphyrin-like Metal Complexes: Synthesis, Excited-State Properties, and Applications for Optical Limiting and Photodynamic Therapy

B.S. Organic Chemistry, Wuhan University, Wuhan, China, July 1990

PROFESSIONAL EXPERIENCE

2011 – Present Professor and Walter F. and Verna Gehrts Professor, Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND

Aug. 2007 – 2011 Associate Professor, Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND

Aug. 2001 – July 2007 Assistant Professor, Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, ND

RESEARCH INTERESTS

Organic/organometallic nonlinear optical materials

Organic/organometallic light emitting materials

Photosensitizers for photodynamic therapy

Optical sensors

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. Ir(III) complexes are promising candidates for these applications due to the weak direct transition from the ground state to the triplet excited state and the broadband excited-state absorption in the visible to the near-IR region. The ease of structural modifications also makes them good candidates for structure-property correlation study. To optimize the reverse saturable absorption (RSA) of Ir(III) complexes, we designed and synthesized several series of heteroleptic cationic Ir(III) complexes with different diimine ligands, different substituents on the cyclometalating ligands and different degrees of -conjugation on the diimine ligand and/or cyclometalating ligands. The photophysical properties of these complexes, including UV-vis absorption, emission, and transient absorption were systematically investigated.

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