29 November 2000 Solvent effect on optical limiting of zinc tetrabenzoporphyrin compounds
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We carried out systematic experiments to study the effect of solvents on power limiting in zinc meso-tetra (p- methoxyphenyl) tetrabenzoporphyrin (ZnTBP). We used Toluene, pyridine, acetone, dichloromethane (DCM) and a toluene pyridine mixture to evaluate polarity and complex formation of the solvent and solute molecules. Z-scan data were generated using picosecond and nanosecond laser pulses at 532 nm. These data were then curvefit to a 5-level model to obtain excited state and two photon absorption coefficients, and the intersystem crossing rates. An f/5 optical limiting setup was used to determine limiting thresholds. Results indicate that toluene and DCM give the lowest limiting thresholds and that pyridine ligation can be used as a means of molecular modification for future molecular studies.
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Brian R. Kimball, Brian R. Kimball, Masato Nakashima, Masato Nakashima, Barry S. DeCristofano, Barry S. DeCristofano, N.K.M. Naga Srinivas, N.K.M. Naga Srinivas, P. Premkiran, P. Premkiran, Desai Narayana Rao, Desai Narayana Rao, Appaji Panchangam, Appaji Panchangam, Devulapalli V. G. L. N. Rao, Devulapalli V. G. L. N. Rao, } "Solvent effect on optical limiting of zinc tetrabenzoporphyrin compounds", Proc. SPIE 4106, Linear, Nonlinear, and Power-Limiting Organics, (29 November 2000); doi: 10.1117/12.408513; https://doi.org/10.1117/12.408513

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