Polynorbornene-Based Double-Stranded Ladderphanes with Cubane, Cuneane, Tricyclooctadiene, and Cyclooctatetraene Linkers

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• 作者：Nai-Hua Yeh ; Chih-Wei Chen ; Shern-Long Lee ; Hung-Jen Wu ; Chun-hsien Chen ; Tien-Yau Luh
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：March 27, 2012
• 年：2012
• 卷：45
• 期：6
• 页码：2662-2667
• 全文大小：299K
• 年卷期：v.45,no.6(March 27, 2012)
• ISSN：1520-5835

文摘

Double-stranded ladderphanes 2, 3, and 5 having cubane, cuneane, and cyclooctatetraene linkers are synthesized by ring-opening metathesis polymerization (ROMP) of the corresponding bisnorbornene monomers 10, 11, and 13, respectively. Attempts to polymerize the corresponding tricyclooctadiene-linked bisnorbornene 12 are not successful, starting monomer being recovered. Polymer with this tricyclic diene linker 4 is obtained from the rhodium-catalyzed isomerization of 2. The scanning tunneling microscopic (STM) image of 2 shows an ordered pattern on the graphite surface by self-assembly.