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Interplay between H-Bonding and Alkyl-Chain Ordering in Self-Assembly of Monodendritic L-Alanine Derivativesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Anokhin Denis V., Lejnieks Janis, Mourran Ahmed, Zhu Xiaomin, Keul Helmut, Moeller Martin, Konovalov Oleg, Erina Natalia, Ivanov Dimitri A.
- Журнал: Chemphyschem: a European journal of chemical physics and physical chemistry
- Том: 13
- Номер: 6
- Год издания: 2012
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 1470
- Последняя страница: 1478
- DOI: 10.1002/cphc.201100739
- Аннотация: This paper reports on the synthesis and self-organizing properties of monodendrons consisting of L-alanine at the focal point and alkyl chains with different length at the periphery. The structures of thin films and monolayers are studied by temperature-resolved grazing-incidence X-ray diffraction and scanning force microscopy. The interplay between H-bonding and ordering of the alkyl chains results in a rich temperature-dependent phase behavior. The monodendrons form H-bonded stabilized clusters with the number of molecules depending on the length of the aliphatic chains and temperature. The clusters play the role of constitutive units in the subsequent self-assembly. Short alkyl chains allow the material to form thermodynamically stable crystalline phases. The molecules with longer side groups exhibit additional transitions from the crystalline phase to thermotropic columnar hexagonal or columnar rectangular liquid-crystalline phases. In monolayers deposited on highly ordered pyrolytic graphite, the materials show ordering similar to thin films. However, for the compound bearing hexadecyl chains the affinity of the alkyl groups to graphite dominates the self-assembly and thereby allows epitaxial growth of a 2D lattice with flat-on oriented molecules.
- Добавил в систему: Анохин Денис Валентинович