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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 9 — May. 1, 2010
  • pp: 1305–1307

Excited-state absorption of a bipyridyl platinum(II) complex with alkynyl-benzothiazolylfluorene units

Timothy M. Pritchett, Wenfang Sun, Bingguang Zhang, Michael J. Ferry, Yunjing Li, Joy E. Haley, David M. Mackie, William Shensky, III, and Andrew G. Mott  »View Author Affiliations


Optics Letters, Vol. 35, Issue 9, pp. 1305-1307 (2010)
http://dx.doi.org/10.1364/OL.35.001305


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Abstract

The singlet excited-state lifetime of a bipyridyl platinum(II) complex containing two alkynyl-benzothiazolylfluorene units was determined to be 145 ± 105   ps by fitting femtosecond transient difference absorption data, and the triplet quantum yield was measured to be 0.14. A ground-state absorption cross section of 6.1 × 10 19 cm 2 at 532 nm was deduced from UV-visible absorption data. Excited-state absorption cross sections of ( 6.7 ± 0.1 ) × 10 17 cm 2 (singlet) and ( 4.6 ± 0.1 ) × 10 16 cm 2 (triplet) were obtained by using a five-level dynamic model to fit open-aperture Z scans at picosecond and nanosecond pulse widths and a variety of pulse energies. For this complex, the ratio of the triplet excited-state absorption cross section to the ground-state absorption cross section—long used as a figure of merit for reverse saturable absorbers—thus stands at 754, to our knowledge the largest ever reported at 532 nm wavelength.

© 2010 Optical Society of America

OCIS Codes
(160.4890) Materials : Organic materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials

ToC Category:
Materials

History
Original Manuscript: January 8, 2010
Manuscript Accepted: January 28, 2010
Published: April 20, 2010

Citation
Timothy M. Pritchett, Wenfang Sun, Bingguang Zhang, Michael J. Ferry, Yunjing Li, Joy E. Haley, David M. Mackie, William Shensky, III, and Andrew G. Mott, "Excited-state absorption of a bipyridyl platinum(II) complex with alkynyl-benzothiazolylfluorene units," Opt. Lett. 35, 1305-1307 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-9-1305

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