Spectral study on the molecular orientation of a tetracationic porphyrin dye on the surface of layered silicates

• Autorzy: Alexander Čeklovský , Juraj Bujdák , Adriana Czímerová , Nobuo Iyi
• Języki publikacji: EN

Abstrakty

EN

Tetracationic porphyrin dyes TMPyP and ZnPyP were intercalated into hydrophobized layered silicate films of three smectites. The smectites represented the layered silicate specimens of high (Fluorohectorite, Corning; FHT), medium (Kunipia F montmorillonite; KF) and low layer charge (Laponite, Laporte; LAP). The molecular orientations of the dye cations were studied by means of linearly-polarized ultraviolet-visible (UV-VIS) spectroscopy. The spectral analysis and consequent calculations of tilting angles of the transition moments at the wavelengths of Soret band transitions were in the range of 25°-35°. The determined angles indicated molecular orientation of the dye cations being almost parallel to the surface of the silicates. Slightly higher values (above 35°), determined for a FHT film, indicated either a slightly tilted orientation of the dye cations or the change of molecular comformation after the intercalation of the dye.

Słowa kluczowe

EN

Dichroism; linearly polarized spectroscopy; molecular orientation; porphyrin dye; smectite

• Czasopismo: Open Physics
• Rocznik: 2007
• Tom: 5
• Numer: 2
• Strony: 236-243

Daty

wydano

2007-06-01

online

2007-06-01

Twórcy

autor

Alexander Čeklovský

• Department of Hydrosilicates, Institute of Inorganic Chemistry, Slovak Academy of Sciences, 842 36, Bratislava, Slovakia,

autor

Juraj Bujdák

• Department of Hydrosilicates, Institute of Inorganic Chemistry, Slovak Academy of Sciences, 842 36, Bratislava, Slovakia

autor

Adriana Czímerová

• Department of Hydrosilicates, Institute of Inorganic Chemistry, Slovak Academy of Sciences, 842 36, Bratislava, Slovakia

autor

Nobuo Iyi

• National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki, 305-0044, Japan

Bibliografia

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Identyfikatory

DOI

10.2478/s11534-007-0010-0