TY - JOUR
T1 - Crystallographic coherent lengths of J-aggregates and their absorption spectra
AU - Kato, Noritaka
AU - Hirosawa, Ichiro
AU - Sato, Masugu
AU - Koganezawa, Tomoyuki
AU - Yuasa, Kazuya
N1 - Funding Information:
The GIXD experiments were performed with the approval of the Japan Synchrotron Research Institute (2003B0222-ND1d-np, 2004A0247-ND1d-np and 2006A1259). This work was supported by the Grant-in-Aids for Young Scientists (B) 17760015, 2005 from MEXT, Japan. One of the authors (K.Y.) was supported by the European Union through the Integrated Project EuroSQIP.
PY - 2008/5/15
Y1 - 2008/5/15
N2 - The Langmuir (L) and Langmuir-Blodgett (LB) films of the J-aggregates formed by amphiphilic merocyanine dye (MD) differ their absorption bands (J-bands), and the J-band in the LB film is located in shorter wavelength than that in the L film. From the grazing incidence X-ray diffraction patterns, the lattice structures and the crystallographic coherent lengths of the MD J-aggregates in the L and LB films were evaluated. Besides a 7% shrinkage of the 2-dimensional lattice in the LB film, more than two-order of magnitude shorter coherent lengths were observed in the LB film, suggesting that the difference of the J-band wavelength was attributed to the size effect of the J-aggregate crystal.
AB - The Langmuir (L) and Langmuir-Blodgett (LB) films of the J-aggregates formed by amphiphilic merocyanine dye (MD) differ their absorption bands (J-bands), and the J-band in the LB film is located in shorter wavelength than that in the L film. From the grazing incidence X-ray diffraction patterns, the lattice structures and the crystallographic coherent lengths of the MD J-aggregates in the L and LB films were evaluated. Besides a 7% shrinkage of the 2-dimensional lattice in the LB film, more than two-order of magnitude shorter coherent lengths were observed in the LB film, suggesting that the difference of the J-band wavelength was attributed to the size effect of the J-aggregate crystal.
KW - J-aggregate
KW - Merocyanine
KW - Size effect
KW - X-ray diffraction
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U2 - 10.1016/j.colsurfa.2008.02.006
DO - 10.1016/j.colsurfa.2008.02.006
M3 - Article
AN - SCOPUS:43949098926
SN - 0927-7757
VL - 321
SP - 275
EP - 280
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -