Infrared Dielectric Function of Photochromic Thiazolothiazole Embedded Polymer
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912836076175360 |
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| author | Shuchi, Nuren Z. Adams, Tyler J. Tumpa, Naz F. Louisos, Dustin Boreman, Glenn D. Walter, Michael G. Hofmann, Tino |
| author_facet | Shuchi, Nuren Z. Adams, Tyler J. Tumpa, Naz F. Louisos, Dustin Boreman, Glenn D. Walter, Michael G. Hofmann, Tino |
| contents | In this paper, the infrared dielectric function of photochromic dipyridinium thiazolo[5,4-d]thiazole embedded in polymer is reported. Bulk thiazolo[5,4-d]thiazole-embedded polymer samples were prepared by drop casting and dehydration in room temperature. The samples were investigated using spectroscopic ellipsometry before and after irradiation with a 405~nm diode laser in the infrared spectral range from 500 cm-1 to 1800 cm-1. The model dielectric functions of the thiazolothiazole embedded polymer film for its TTz2+ (unirradiated) and TTz0 (irradiated) states are composed of a series of Lorentz oscillators in the measured spectral range. A comparison of the obtained complex dielectric functions for the TTz2+ and TTz0 states shows that the oscillators located in the spectral ranges 500 cm-1 - 700 cm-1, 1300 cm-1 - 1400 cm-1, and 1500 cm-1 - 1700 cm-1 change in both amplitude and resonant frequency upon transition between the states. Additionally, a resonance at approximately 1050 cm-1 exhibited a change in oscillator amplitude but not resonant frequency due to the photochromic transition. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_22012 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Infrared Dielectric Function of Photochromic Thiazolothiazole Embedded Polymer Shuchi, Nuren Z. Adams, Tyler J. Tumpa, Naz F. Louisos, Dustin Boreman, Glenn D. Walter, Michael G. Hofmann, Tino Materials Science Soft Condensed Matter Optics In this paper, the infrared dielectric function of photochromic dipyridinium thiazolo[5,4-d]thiazole embedded in polymer is reported. Bulk thiazolo[5,4-d]thiazole-embedded polymer samples were prepared by drop casting and dehydration in room temperature. The samples were investigated using spectroscopic ellipsometry before and after irradiation with a 405~nm diode laser in the infrared spectral range from 500 cm-1 to 1800 cm-1. The model dielectric functions of the thiazolothiazole embedded polymer film for its TTz2+ (unirradiated) and TTz0 (irradiated) states are composed of a series of Lorentz oscillators in the measured spectral range. A comparison of the obtained complex dielectric functions for the TTz2+ and TTz0 states shows that the oscillators located in the spectral ranges 500 cm-1 - 700 cm-1, 1300 cm-1 - 1400 cm-1, and 1500 cm-1 - 1700 cm-1 change in both amplitude and resonant frequency upon transition between the states. Additionally, a resonance at approximately 1050 cm-1 exhibited a change in oscillator amplitude but not resonant frequency due to the photochromic transition. |
| title | Infrared Dielectric Function of Photochromic Thiazolothiazole Embedded Polymer |
| topic | Materials Science Soft Condensed Matter Optics |
| url | https://arxiv.org/abs/2503.22012 |