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16 December 2004 Novel dendrimer-capped Pt-acetylides for optical power limiting
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Abstract
This report presents preliminary optical limiting and spectroscopic characterization of dendrimer capped Pt-ethynyls. Preliminary OPL and spectroscopic characterization revealed that these have better OPL properties than the non-capped analogue. The excited state properties in terms of luminescence for emission at ca 400 nm and 525 nm is in the nanosecond and microsecond range, respectively. The site isolation provided by the dendrimer capping also give rise to strong phosphorescence involving the same emission bands near 525 nm. The decay time for this was found to be in the range 0.2 ms, considerably longer than for other similar Pt-complexes, and we tentatively assign this to a site-isolation effect that prevents quenching of the triplete state. It was shown how the dendron capping also makes it feasible to blend the dye with e.g. MMA monomers and carry out polymerization to obtain a solid OPL device with good performance.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert Vestberg, Eva Malmstroem, Anders Eriksson, Cesar Lopes, and Mikael Lindgren "Novel dendrimer-capped Pt-acetylides for optical power limiting", Proc. SPIE 5621, Optical Materials in Defence Systems Technology, (16 December 2004); https://doi.org/10.1117/12.580603
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