Organic/Organometallic Hybrids as Broadband Nonlinear Transmission Materials
Abstract
The ultimate goal of this project is to understand the structure-property correlation in organometallic complexes in order to develop broadband nonlinear transmission materials. To realize this goal, we have synthesized and performed systematic photophysical study and nonlinear optical characterization of 87 square-planar platinum terdentate/bidentate complexes, 5 texaphyrin derivatives, and 6 stilbazolium derivatives. In addition, we investigated the photophysics and nonlinear absorption of 10 other platinum complexes and 10 zinc phthalocyanine derivatives provided by collaborators in China. From these studies, we have discovered that in order to improve the reverse saturable absorption, reducing the ground-state absorption is critical. To expand the nonlinear absorption spectral region from the visible to the near-IR for the platinum complexes, we incorporated substituted fluorene component to the terdentate ligand or acetylide ligand(s) in order to utilize the reverse saturable absorption in the visible and two-photon induced excited-state absorption in the near-IR region. Several platinum complexes synthesized by our group exhibit the largest ratio of excited-state absorption to groundstate absorption cross section and the largest two-photon absorption cross-sections ever reported for organometallic complexes. They are the most promising broadband nonlinear absorption organometallic complexes reported to date. One of them have been used for ARL field test and exhibit promising results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2010
- Accession Number
- ADA544988
Entities
People
- Wenfang Sun
Organizations
- North Dakota State University