Nonlinear optical behavior of alkyne terminated phthalocyanines in solution and when embedded in polysulfone as thin films: Effects of aggregation |
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| Affiliation: | 1. Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa;2. NTO Vocational School, Gaziantep University, Turkey;1. Advanced Photonics Center, Southeast University, Nanjing 210096, China;2. Key Laboratory of Inorganic Chemistry in Universities of Shandong, Department of Chemistry and Chemical Engineering, Jining University, Qufu, 273155, China;3. School of Physics and Electronics, Central South University, Changsha, 410012, China;1. Thin Film Laboratory, Instruments Research and Development Establishment, Dehradun 248008, India;2. Dept. of Physics, Guru Jambheshwar University of Science & Technology, Hisar 125001, India;1. Department of Chemistry, M.V. Lomonosov Moscow State University, 1 Leninskie Gory, Moscow 119991, Russian Federation;2. Institute of Physiologically Active Compounds, Russian Academy of Sciences, 1 Severny proezd, Chernogolovka, Moscow Region 142432, Russian Federation;3. Skolkovo Institute of Science and Technology, 3 Nobel street, Moscow, 143026, Russian Federation |
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| Abstract: | We report here for the first time, on the comparative studies of the photophysical and optical limiting behavior of our two novel phthalocyanines namely 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyanines 2, and 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyaninato zinc (II) (3) in solution and thin films. Nonlinear optical (NLO) properties of the samples in solution and contained in polysulfone (PSU) thin films were evaluated using Z-scan technique at 532 nm and 10 ns pulsed duration. Effects of aggregation and disaggregation on the NLO performance of metal-free phthalocyanine are reported in detail. Our findings showed that the prepared Pcs show larger nonlinear absorption coefficient and lower limiting thresholds when embedded in polysulfone films compared to in solutions. The values of nonlinear susceptibility and hyperpolarizability recorded for 3-PSU in this work are respectively, ∼2.09 × 10−8 esu and ∼1.02 × 10−26 esu. These values are among the largest values reported for phthalocyanines and other macrocycles doped on polymer matrices. |
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| Keywords: | Phthalocyanine Open aperture Z-scan Polysulfone Nonlinear optics Reverse saturable absorption |
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