Photopolymerization of Organic Molecular Crystal Nanorods

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• 作者：Rabih O. Al-Kaysi ; Robert J. Dillon ; J. Michael Kaiser ; Leonard J. Mueller ; Gonzalo Guirado ; Christopher J. Bardeen
• 刊名：Macromolecules
• 出版年：2007
• 出版时间：December 11, 2007
• 年：2007
• 卷：40
• 期：25
• 页码：9040 - 9044
• 全文大小：405K
• 年卷期：v.40,no.25(December 11, 2007)
• ISSN：1520-5835

文摘

The dianthracene molecule 9-anthracenecarboxylic acid, methylene ester (9AC-ME) was synthesizedand used to form molecular crystal nanorods using anodized aluminum oxide templates. A high-temperaturesolvent annealing process generated a crystal polymorph where neighboring monomers had overlapping anthracenemoieties. Subsequent exposure to ultraviolet light caused the monomers to undergo a [4 + 4] photocycloadditionreaction, forming highly crystalline polymer nanorods of poly(9AC-ME). The polymer nanorods are flexible,resistant to breakage, and insoluble in organic solvents and strong acid/base solutions. Their molecular structureis characterized by powder X-ray diffraction, solid-state NMR, and UV-vis spectroscopy. Different diametercrystalline polymer nanorods could be fabricated using alumina templates of variable pore diameter.