Construction of Microbelts through the Coassembly of a Disclike Molecule and Primary Alkyl Ammoniums: A Noncovalent Strategy to Mimic Covalently Bonded π-Core Alkyl Chain Structure

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• 作者：Ze-Yun Xiao ; Xin Zhao ; Xi-Kui Jiang ; Zhan-Ting Li
• 刊名：Langmuir
• 出版年：2010
• 出版时间：August 17, 2010
• 年：2010
• 卷：26
• 期：16
• 页码：13048-13051
• 全文大小：773K
• 年卷期：v.26,no.16(August 17, 2010)
• ISSN：1520-5827

文摘

In this letter, we report the fabrication of microbelts through the coassembly of hexa-2-pyridyl-hexaazatriphenylen (HPHAT), a disklike π-conjugated molecule, with primary alkyl ammonium triflate. The strategy is first to construct hydrogen-bonded complexes between HPHAT and primary alkyl ammoniums to mimic covalently bonded π-core alkyl chain structures, and then the complexes self-assemble into microbelts driven by π−π stacking in the π core and van der Waals interactions between the peripheral alkyl chains. The morphology of as-prepared microbelts has been characterized with scanning electron microscopy (SEM), optical microscopy, polarizing microscopy, and transmission electron microscopy (TEM). Spectroscopic and crystallographic investigations were also carried out to reveal the formation mechanism of the microbelts, through which a sequential self-assembly process has been proposed.