skip to main content
Ngôn ngữ:
Giới hạn tìm kiếm: Giới hạn tìm kiếm: Dạng tài nguyên Hiển thị kết quả với: Hiển thị kết quả với: Chỉ mục

Conformational interchange of a carbohydrate by mechanical compression at the airwater interface

Sakakibara, Keita ; Fujisawa, Takuya ; Hill, Jonathan P. ; Ariga, Katsuhiko

Physical Chemistry Chemical Physics, 2014, Vol.16(22), pp.10286-10294 [Tạp chí có phản biện]

ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c3cp55078h

Toàn văn sẵn có

Phiên bản sẵn có
Trích dẫn Trích dẫn bởi
  • Nhan đề:
    Conformational interchange of a carbohydrate by mechanical compression at the airwater interface
  • Tác giả: Sakakibara, Keita ; Fujisawa, Takuya ; Hill, Jonathan P. ; Ariga, Katsuhiko
  • Chủ đề: Constraining ; Fluorescence ; Lipids ; Monolayers ; Excimers ; Molecular Machines ; Condensing ; Compressing ; Miscellaneous Sciences (So)
  • Là 1 phần của: Physical Chemistry Chemical Physics, 2014, Vol.16(22), pp.10286-10294
  • Mô tả: Methyl xylopyranoside containing three 4-(pyrene-1-yl)benzoyl groups (PyXy) undergoes conformational interchange within a Langmuir monolayer upon mechanical compression. This xylose-type molecular machine PyXy was immobilized within two different matrix lipids, methyl stearate and methyl 2,3,4-tri- O -stearoyl-- d -xylopyranoside, which respectively form rigid and soft monolayers. Structural properties of the monolayer were characterized by assessing the compressibility, compression modulus, and ideal limiting molecular area of PyXy, all of which were estimated from the A isotherm measurements. Only the rigid monolayer exhibited a transition to the condensed phase with a limiting molecular area of PyXy smaller than that of the cross-sectional area of the xylopyranose ring in its C1 chair conformation. This suggests conformational interchange of PyXy from the most stable 4 C 1 (C1) form to the metastable 1 C 4 (1C) form. Surface-reflective fluorescence spectroscopy of the monolayer was applied to detect excimer emission resulting from the face-to-face dimerization of pyrenes attached at the O -2 and O -4 positions of xylose. Fluorescence intensity of the excimer increased abruptly in the condensed region only when the rigid monolayer was applied. These results indicate that the rigidity of the matrix monolayer is a critical aspect of the precise manipulation of molecular machines at interfaces. Consequently, this study demonstrates that including a molecular machine into a rigid lipid matrix is a promising means for the preparation of a novel nanoassembly with dynamic functionalities variable depending on a mechanical stimulus.
  • Số nhận dạng: ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c3cp55078h

Đang tìm Cơ sở dữ liệu bên ngoài...