Low-Valent Niobium Catalysis for the Polymerization of Electron-Rich Diphenylacetylenes

被引：3

作者：

Nakaguchi, Daisuke ^{[1
]}

Taniguchi, Tsuyoshi ^{[1
,2
]}

Nishimura, Tatsuya ^{[1
]}

Maeda, Katsuhiro ^{[1
,2
]}

机构：

[1] Kanazawa Univ, Grad Sch Nat Sci & Technol, Kanazawa 9201192, Japan

[2] Kanazawa Univ, Nano Life Sci Inst WPI NanoLSI, Kanazawa 9201192, Japan

来源：

MACROMOLECULES | 2023年 / 56卷 / 15期

关键词：

METATHESIS POLYMERIZATION; COMPLEXES; CYCLOADDITION; POLYMERS; ALKYNE; METALLACYCLOPENTADIENES; DERIVATIVES; ACETYLENES; NBCL5;

D O I：

10.1021/acs.macromol.3c00740

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A low-valent niobium (Nb) species formed in situ fromNbCl(5) with PhSiH3 induces the polymerizationof diphenylacetyleneshaving electron-donating groups to afford the corresponding poly(diphenylacetylene)s(PDPAs) with high molecular weights in good yield. An insertion ring-expansionmechanism would be involved in the polymerization and would producecyclic PDPAs, as suggested by results of atomic force microscopy (AFM)observations and NMR analysis of the obtained polymers. The presentpolymerization method was applicable to the synthesis of symmetricallysubstituted PDPAs having chiral alkoxy pendants at para- and meta-positions, and their chiroptical propertieswere investigated.

引用

页码：5873 / 5880

页数：8

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