Self-Assembly, Structural, and Retrostructural Analysis of Dendritic Dipeptide Pores Undergoing Reversible Circular to Elliptical Shape Change
摘要:
The synthesis of dendritic dipeptides (4- 3,4- 3,5- 4) 12G2-CH2-Boc-L-Tyr- L-Ala-OMe and (4-3, 4-3,5-4) 12G2-CH2-Boc-D-Tyr-D-Ala-OMe is described. These dendritic dipeptides self-assemble into porous elliptical and circular columns that in turn self-organize into centered rectangular columnar and hexagonal columnar periodic arrays. The transition from porous elliptical to porous circular columns is mediated in a reversible or irreversible way by the thermal history of the sample. A method to determine the dimensions of hollow elliptical and circular columns by the reconstruction of the small-angle powder X-ray diffractograms of the centered rectangular or hexagonal columnar lattices was elaborated. This technique together with wide-angle X-ray experiments performed on aligned fibers provided access to the structural and retrostructural analysis of elliptical supramolecular pores. This procedure is general and can be adapted for the determination of the dimensions of pores of any columnar shape.
Self-Assembly, Structural, and Retrostructural Analysis of Dendritic Dipeptide Pores Undergoing Reversible Circular to Elliptical Shape Change
作者:Mihai Peterca、Virgil Percec、Andrés E. Dulcey、Sami Nummelin、Stephanie Korey、Monica Ilies、Paul A. Heiney
DOI:10.1021/ja0611902
日期:2006.5.1
The synthesis of dendritic dipeptides (4- 3,4- 3,5- 4) 12G2-CH2-Boc-L-Tyr- L-Ala-OMe and (4-3, 4-3,5-4) 12G2-CH2-Boc-D-Tyr-D-Ala-OMe is described. These dendritic dipeptides self-assemble into porous elliptical and circular columns that in turn self-organize into centered rectangular columnar and hexagonal columnar periodic arrays. The transition from porous elliptical to porous circular columns is mediated in a reversible or irreversible way by the thermal history of the sample. A method to determine the dimensions of hollow elliptical and circular columns by the reconstruction of the small-angle powder X-ray diffractograms of the centered rectangular or hexagonal columnar lattices was elaborated. This technique together with wide-angle X-ray experiments performed on aligned fibers provided access to the structural and retrostructural analysis of elliptical supramolecular pores. This procedure is general and can be adapted for the determination of the dimensions of pores of any columnar shape.
US7671033B2
申请人:——
公开号:US7671033B2
公开(公告)日:2010-03-02
Percec, Virgil; Peterca, Mihai; Dulcey, Andres E., Journal of the American Chemical Society, 2008, vol. 130, p. 13079 - 13094
作者:Percec, Virgil、Peterca, Mihai、Dulcey, Andres E.、Imam, Mohammad R.、Hudson, Steven D.、et al.