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CONJUGATED POLYMERS AND SMALL MOLECULES WITH LATENT HYDROGEN-BONDING FOR ORGANIC ELECTRONIC APPLICATIONS

Yang, Kun
http://rave.ohiolink.edu/etdc/view?acc_num=akron149083508357808

Abstract Details

2017, Doctor of Philosophy, University of Akron, Polymer Science.
Conjugated polymers and small molecules are gaining a growing attention as the active materials for flexible and printed electronics. The present work discusses the exploration of novel conjugated polymers and small molecules with latent hydrogen-bonding on the conjugated backbone for electronic applications. In the first study, we synthesized a class of conjugated polymers with latent hydrogen-bonding utilizing Suzuki coupling reactions.3 The resulting polymers can be converted into actual hydrogen-bonded polymers upon thermal or UV removal of the t-butoxyl carbonyl (t-Boc) protection groups on the main chains. Large bathochromic absorption shift and dramatically decreased material solubility of the polymer were shown after the formation of hydrogen-bonding, indicating their enhanced interchain interactions. Photolithographic patterned electrochromic devices was fabricated and tested with the latent hydrogen-bonded conjugated polymers. The second study extends in assessing the field-effect transistor performance of two diketopyrrolopyrrole-based conjugated small molecules with latent hydrogen-bonding. Effects of the activation of latent hydrogen-bonding networks on the small molecule film properties, including UV/Vis absorption, band gap, solvent resistance, film morphology, molecular packing mode, and charge mobility are investigated. Highly crystalline films and improved field-effect mobility of the device was observed for both small molecules after the hydrogen-bonding activation, suggesting an efficient control of molecular organization and device performance of the latent hydrogen-bonding strategy. Based on similar principles, a series of conjugated statistical copolymers with varied latent hydrogen-bonding content on the main chain were studied in the third part of this work. Increased hole mobility was observed for the organic field-effect transistor devices of polymers in which higher percentage of hydrogen-bonded repeating units were comprised, which suggested the potential of latent hydrogen-bonding strategy in constructing solution-processed conjugated polymers with improved semiconducting performance.
Zhu Yu, Dr. (Advisor)
Stephen Z.D. Cheng, Dr. (Advisor)
Mesfin Tsige, Dr. (Committee Chair)
Toshikazu Miyoshi, Dr. (Committee Member)
Steven S.C. Chuang, Dr. (Committee Member)
Chrys Wesdemiotis, Dr. (Committee Member)
174 p.
Chemistry; Materials Science; Polymer Chemistry

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Citations

  • Yang, K. (2017). CONJUGATED POLYMERS AND SMALL MOLECULES WITH LATENT HYDROGEN-BONDING FOR ORGANIC ELECTRONIC APPLICATIONS [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron149083508357808

    APA Style (7th edition)

  • Yang, Kun. CONJUGATED POLYMERS AND SMALL MOLECULES WITH LATENT HYDROGEN-BONDING FOR ORGANIC ELECTRONIC APPLICATIONS. 2017. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron149083508357808.

    MLA Style (8th edition)

  • Yang, Kun. "CONJUGATED POLYMERS AND SMALL MOLECULES WITH LATENT HYDROGEN-BONDING FOR ORGANIC ELECTRONIC APPLICATIONS." Doctoral dissertation, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron149083508357808

    Chicago Manual of Style (17th edition)

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