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Number of results

Journal

2008 | 6 | 4 | 569-574

Article title

Spectral properties of tetraanionic porphyrin in formamide colloids of layered double hydroxides

Content

Title variants

Languages of publication

EN

Abstracts

EN
Formamide colloidal suspensions of layered double hydroxides (LDHs) with anionic dye, meso-tetrakis(4-sulfonatophenyl)porphine (TPPS) were prepared. Optical properties of these suspensions were investigated by means of absorption and fluorescence spectroscopies in the visible region. For more detailed characterization, second derivative curves of the spectra were calculated. The adsorption of the dye on LDH nanosheets led to partial molecular aggregation, reflected in significant changes of the dye optical properties. The Soret band in the absorption spectra was split into two peaks and decreased in intensity. Changes were observed also for the Q-bands. The molecular aggregation significantly quenched the emission of the dye. The low intensity emission from dye H-aggregates was identified at slightly longer wavelengths. The molecular aggregation increased with the dye/LDH ratio. At low dye loadings, the optical properties were very similar to the dye solution. The yields of the dye molecular aggregation increased with LDH surface charge. [...]

Publisher

Journal

Year

Volume

6

Issue

4

Pages

569-574

Physical description

Dates

published
1 - 12 - 2008
online
28 - 10 - 2008

Contributors

author
  • Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36, Bratislava, Slovakia
author
  • National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-008-0074-8
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