Long-lifetime reverse saturable absorption in a bipyridyl platinum(II) complex bearing naphthalimidylethynyl-substituted fluorenylacetylide ligands

Content Provider	Semantic Scholar
Author	Pritchett, Timothy M. Ferry, Michael J. Mott, Andrew G. Shensky, William M. Haley, Joy E. Sun, Wenfang
Copyright Year	2015
Abstract	By fitting femtosecond transient difference absorption time series at multiple wavelengths, the singlet excited-state lifetime of a particular platinum(II) 2,2 0 -bipyridyl complex bearing naphthalimidylethynyl-substituted fluorenyl-acetylide ligands was determined to be 83.5 ± 39 ps in toluene solution. A triplet quantum yield of 0.06 was measured using relative actinometry. Excited-state absorption cross sections of 5.6 � 10 � 17 cm 2 (singlet) and 7.8 � 10 � 16 cm 2 (triplet) at 532 nm 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. Most significantly, fits of nanosecond transient difference absorption decay data yield a value of 16.3 ls for the triplet excited-state lifetime of the complex in deoxygenated toluene solution, longer by a factor of almost 20 than the lifetime of the analogous complex with benzothiazolylsubstituted ligands. Published by Elsevier B.V.
Starting Page	195
Ending Page	198
Page Count	4
File Format	PDF HTM / HTML
DOI	10.1016/j.optmat.2014.11.025
Alternate Webpage(s)	http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1071&context=usafresearch
Alternate Webpage(s)	https://doi.org/10.1016/j.optmat.2014.11.025
Volume Number	39
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article