The indophenine reaction as a metal-free method for synthesizing conjugated polymers with sub-1 eV optical bandgaps Jônatas Faleiro Berbigier , Renita M. D’Souza, Raymond N. Bennett, Timothy L. Kelly Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada Traditionally, conjugated polymer syntheses have relied heavily on metal-catalyzed cross-coupling reactions, such as Stille, Sonogashira and Suzuki couplings, as well as direct heteroarylation polymerization. 1 However, the metals used in these reactions (e.g., palladium, tin) can be difficult to remove completely after synthesis. Studies show that these metallic impurities can accumulate in the form of nanoparticles and act as electron and hole traps, severely affecting the device performance. 2 In this poster, I will discuss a metal-free approach to the synthesis of π-conjugated organic polymers. The methodology uses the indophenine reaction for the polymerization. The polymers produced by this method have a quinoidal structure, and their low optical bandgaps, combined with their voltage-responsive electrochromic behavior, suggests their potential in NIR-specific applications, including photodetectors and variable optical attenuators. References 1. A. Marrocchi, A. Facchetti, D. Lanari, C. Petrucci, L. Vaccaro, Energy Environ. Sci. 9, 763 (2016) 2. M. P. Nikiforov, B. Lai, W. Chen, S. Chen, R. D. Schaller, J. Strzalka, J. Maser, S. B. Darling, Energy Environ. Sci. 6, 1513 (2013)
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