Orientation and conformation of octadecyl rhodamine B in hybrid Langmuir–Blodgett monolayers containing clay minerals

文献情報

出版日 2004-10-11

DOI 10.1039/B411339J

インパクトファクター 3.676

著者

Robin H. A. Ras, Cliff T. Johnston, Imre Dékány, Robert A. Schoonheydt

原文を見る

要旨

To control the molecular organization of octadecyl rhodamine B (RhB18), hybrid Langmuir–Blodgett monolayers containing clay minerals were prepared. The orientation and conformation of the RhB18 molecule were analyzed by polarized attenuated total reflection Fourier transform infrared (ATR–FTIR) spectroscopy and fluorescence spectroscopy. Monomers and dimers of RhB18 were observed by UV-Vis absorption spectroscopy. Infrared bands of RhB18 exhibited dichroism and shifted to higher or lower wavenumbers in films as a function of clay content. The main fluorescence band of RhB18 was more intense and shifted to lower wavelengths in films with higher clay content. In films without clay, the phenyl group of RhB18 is tilted relative to the xanthene group and both groups are tilted relative to the substrate. In films with clay, both the phenyl group and xanthene group are oriented parallel to the clay surface which is parallel to the substrate. The clay mineral surface induces a change in the conformation and orientation of the RhB18 chromophore.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.