The excited state absorption and optical limiting of a series of platinum(II) 4'-arylterpyridyl acetylide complexes have been investigated. These complexes possess relatively long triplet excited state lifetime that varies from tens of nanoseconds to several microseconds; and exhibit broad triplet excited state absorption in most of the visible to near infrared spectral region. Nonlinear transmission experiments demonstrate that all of the complexes show pronounced optical limiting for ns laser pulses at 532 nm. The photophysical properties and optical limiting characteristics are influenced significantly by the nature of 4'-aryl substituent and the acetylide ligand.
© 2005 Chinese Optics Letters
(160.4330) Materials : Nonlinear optical materials
(160.4890) Materials : Organic materials
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
Wenfang Sun and Fengqi Guo, "Excited state absorption and optical limiting of platinum(II) 4'-arylterpyridyl acetylide complexes," Chin. Opt. Lett. 3, S34-S37 (2005)