期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 20, 页码 10795-10805出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b01456
关键词
platinum(II) acetylide; optical power limiting; nonlinear absorption; two-photon absorption; reverse-saturable absorption
资金
- Air Force Office of Scientific Research [FA-9550-06-1-1084, FA9550-09-1-0219]
- U.S. National Science Foundation [CHE-1151624]
A series of platinum(II) acetylide complexes containing p-phenylenevinylene and Moieties end-capped with triphenylamine groups have been incorporated into poly(methyl methacrylate) (PMMA) monoliths for optical power limiting. applications. The one- and two-photon photophysical properties were investigated and compared to the photophysical properties in THF. The absolute two-photon absorption cross-section values for the monolith samples were measured and are comparable to the values obtained in solution. In the PMMA monoliths, the complexes retained the important two-photon absorption and reverse saturable absorption properties necessary for optical power limiting via dual mode mechanism, and their strong nonlinear absorption property was demonstrated by the open-aperture Z-scan method. Photostability studies of the p-phenylenevinylene platinum(II) acetylide complexes showed two photodegradation processes a trans-to-cis isomerization and a singlet-oxygen sensitized self-oxidative cleavage. The photostability of the least photostable complex TPV0 was increased upon incorporation into a PMMA matrix.
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