A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, name: 1-(4-Methylenepiperidin-1-yl)ethanone, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 308087-58-3, Name is 1-(4-Methylenepiperidin-1-yl)ethanone, molecular formula is C8H13NO. In a Article, authors is Caffy，once mentioned of 308087-58-3
Three pi-conjugated alternating copolymers, based on dibenzosilole as an electron-rich unit and fluorinated or non-fluorinated quinoxaline as an electron-withdrawing unit, connected through thiazole or thiophene moieties, have been synthesized, fully characterized and applied as donors in polymer solar cells (PSCs). The three copolymers, namely PDBS-TQx, PDBS-TQxF and PDBS-TzQx, belong to the wide band-gap semiconductor materials family, and they show an absorption edge in the visible region close to 650 nm. In order to tune the position of the polymer energy levels, and in particular to decrease their HOMO energy level, we compare the use of a thiazole spacer sandwiching the electron-deficient moiety as an alternative way to the popular backbone fluorination. PSCs based on a blend of PDBS-TQx and [6,6]-phenyl-C71-butyric acid methylester (PC71BM) as an active layer have shown the best device performances with a maximum power conversion efficiency (PCE) of 5.14% for the active area of 0.28 cm2 (under standard illumination of AM 1.5G, 1000 W m-2). Interestingly this polymer outperforms P3HT:(PC61BM) solar cells used as a reference material in this work. In addition to the thorough characterization data, including among other spectroscopy techniques, XRD, OFET, AFM and nc-AFM, we discuss in detail the relationship between the chemical structures of the three polymers, their optoelectronic properties, the phase separation in blends with PC71BM and their photovoltaic performances.
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Reference：
Piperidine – Wikipedia,
Piperidine | C5H6398N – PubChem