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An investigation of the excited state properties of (E)-1,2-bis(2,2'-bithiophene-5-yl)ethylene using femtosecond time resolved spectroscopy

Cook, Samuel C.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1471346027

Abstract Details

2016, Master of Science, Ohio State University, Chemistry.
The conductive oligomer (E)-1,2-bis(2,2'-bithiophene-5-yl)ethylene (abbreviated T2VT2) was studied in its excited state using transient absorption spectroscopy and femtosecond infrared spectroscopy. The resulting spectra were interpreted and compared to previous experimental data taken using diphenyl stilbene. A single broad transient electronic absorption band was observed to decay according to a biexponential equation with time components on the order of 30-80 ps and 800-1500 ps. Femtosecond stimulated IR spectroscopy reveals no excited state vibrational data, but does have a broad background signal which decays according to a biexponential equation as well, with time constants on the order of 5-20 ps and 700-1500 ps. Early time oscillations were observed but remain unexplored. These results indicate that T2VT2 has a long lived excited state with a conformationally constrained structure. The origin of the transient absorption bands was unclear, and could be attributed to between one and three singlet energy levels, or the generation of a free electron by the photoexcitation of the compound.
Terry Gustafson (Advisor)
Robert Baker (Committee Member)
60 p.
Chemistry
Ultrafast Spectroscopy Transient Absorption Femtosecond Infrared Conducting Oligomer Thiophene

Recommended Citations

Citations

  • Cook, S. C. (2016). An investigation of the excited state properties of (E)-1,2-bis(2,2'-bithiophene-5-yl)ethylene using femtosecond time resolved spectroscopy [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471346027

    APA Style (7th edition)

  • Cook, Samuel. An investigation of the excited state properties of (E)-1,2-bis(2,2'-bithiophene-5-yl)ethylene using femtosecond time resolved spectroscopy. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1471346027.

    MLA Style (8th edition)

  • Cook, Samuel. "An investigation of the excited state properties of (E)-1,2-bis(2,2'-bithiophene-5-yl)ethylene using femtosecond time resolved spectroscopy." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471346027

    Chicago Manual of Style (17th edition)

osu1471346027
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This open access ETD is published by The Ohio State University and OhioLINK.