Vaterite Polymorph Switching Controlled by Surface Charge Density of an Amphiphilic Dendron-calix[4]arene

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• 作者：Marc Fricke ; Dirk Volkmer ; Carl E. Krill III ; Michael Kellermann ; and Andreas Hirsch
• 刊名：Crystal Growth & Design
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：6
• 期：5
• 页码：1120 - 1123
• 全文大小：177K
• 年卷期：v.6,no.5(May 2006)
• ISSN：1528-7505

文摘

The highly charged amphiphilic dendron-calixarene (1) forms stable monolayers at the air-water interface.Crystallization of CaCO₃ beneath monolayers of 1 selectively leads to growth of the metastable polymorph vaterite at low surfacepressure, in distinct contrast to the growth characteristics of calcite or aragonite crystals under less highly charged calixarene monolayers,as we have reported previously. This result lends further support to our hypothesis that surface charge density is the dominant factorgoverning heterogeneous nucleation of CaCO₃ crystals at the monolayer/solution interface.