Wei-Shi Li

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Name: 李维实; WeiShi Li

Organization: Chinese Academy of Sciences , China

Department: Shanghai Institute of Organic Chemistry

Title: Researcher/Professor(PhD)

TOPICS

Organic Chemistry

Chemicals
References

Diindole[3,2-b:4,5-b′]pyrrole as a chromophore containing three successively fused pyrroles: synthesis, optoelectronic properties and π-functionalization

Co-reporter:Ming-Jian Jiang, Wen-Jing Xiao, Jin-Chang Huang, Wei-Shi Li, Yue-Qi Mo

Tetrahedron 2016 Volume 72(Issue 7) pp:979-984

Publication Date(Web):18 February 2016

DOI:10.1016/j.tet.2015.12.069

Diindole[3,2-b:4,5-b′]pyrrole (DIP) is an interesting chromophore containing three successively fused pyrrole rings. However, its basic properties and further π-functionalization have been rarely explored. In this article, two DIP compounds with alkyl or aromatic substituents at the central N position were successfully prepared. The preliminary optoelectronic properties of them also were studied. The property of possessing two reversible oxidation redox couples also agrees with their electron-rich nature. Similar to the alkyl case, the aromatic substitution at the central N position has subtle influence on DIP basic optoelectronic properties. Furthermore, these two compounds can be easily π-modified via the attachment of various π moieties at 2,9 or 3,8 positions of DIP skeleton. Compared with that at 2,9 positions, π-functionalization at 3,8 positions showed a much better π-extension effect.

Changing to Poly(rod-coil) Polymers: a Promising Way for an Optoelectronic Compound to Improve Its Film Formation

Co-reporter:Wei Shao;Long Liang;Xuan Xiang;Hong-jiao Li;Fu-gang Zhao

Chinese Journal of Chemistry 2015 Volume 33( Issue 8) pp:847-851

Publication Date(Web):

DOI:10.1002/cjoc.201500179

Abstract

Good film formation is one of basic requirements for organic optoelectronic materials to achieve the capability for fabrication of large area devices. Small molecular optoelectronic compounds have a definite chemical structure and clear device performance, and thus are welcomed in the field. However, they are generally suffering from poor film formation, especially in a large area. For addressing it, this contribution proposes and demonstrates a strategy, that is, changing them into poly(rod-coil) polymers. With one optoelectronic compound [BDT(DTBT)₂] and three poly(rod-coil) polymers (P1, P2, and P3) having different non-conjugated coil segments as examples, the work clearly shows that the change to poly(rod-coil) polymers keeps many basic optoelectronic properties of the reference compound, including light absorption in solution, bandgap and frontier orbital energy levels, but suppresses strong intermolecular interactions and crystalline structure in film state. Further comparisons on film formation quality on glass and ITO glass illustrate that all the three polymers have a better film formation property than the reference compound.