[ORG-06]Synthesis and properties of a donor-acceptor nanobox and its analogs

Conjugated nanobelts are attractive molecules of synthetic challenges, unique properties, and interesting applications. Some efforts to synthesize carbon nanobelts have received success by the groups of Itami and Miao, respectively. Replacing carbon atoms in carbon nanobelts with nitrogen atoms leads to N-doped carbon nanobelts, which can modulate their electronic properties. A handful of N-doped carbon nanobelts have been proposed, but never synthesized. Herein, we report a new design of N-doped zigzag carbon nanobelt, its synthetic precursor, a tetraepoxy nanobox and its two analogs were successfully synthesized.

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[ORG-04]Studies and applications of selenonium salts in organocatalysis

In summary, we have demonstrated for the first time that cationic selenium species can act as Lewis acids to activate carbonyl compounds in various types of reactions, including position-selective aryl bromination, electrophilic cyclization, carbonyl-ene reaction, Mukaiyama-type aldol reaction and Mannich reaction. The scope is wide and the reaction conditions are mild. This proof-of-concept work opens a new avenue for the development of a new class of Lewis acid organocatalysts.

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[ORG-01]A dopant-free polymeric hole-transporting material enabled high fill factor over 81% for highly efficient perovskite solar cells

A dopant-free polymeric hole transport material (HTMs) was synthesized to fabricate the n-i-p type perovskite solar cells (PVSCs). The carbonyl (C=O) groups can passivate defects of under-coordinated Pb atoms exist in the surface of perovskite films. PBT1-C based devices achieve a fill factor (FF) of 81.22%, which is the highest value among the dopant-free polymeric HTMs based PVSCs. A PCE of 19.06% is obtained compared to that of the P3HT based device.

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