Electronic structure changes in cobalt phthalocyanine due to nanotube encapsulation probed using resonant inelastic X-ray scattering

Literature Information

Publication Date 2010-06-10
DOI 10.1039/C002501A
Impact Factor 3.676
Authors

Janine C. Swarbrick, Tsu-Chien Weng, Karina Schulte, Andrei N. Khlobystov, Pieter Glatzel


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Abstract

The electronic structure of cobalt phthalocyanine (CoPc) changes upon encapsulation inside multi-walled carbon nanotubes (CoPc@MWNT), as detected in this research using Co-K-edge X-ray absorption near-edge structure spectroscopy (XANES) and Co-Kα1 resonant inelastic X-ray scattering (RIXS). The CoPc molecules are no longer planar once inside the nanotubes, and the molecular symmetry is found to change upon encapsulation from D4h to C4v symmetry. This change of symmetry increases the amount of p–d orbital mixing, which is seen in the spectra as a change in peak intensity. Energy shifts are also seen between CoPc and CoPc@MWNT, showing that Co in the encapsulated species is more oxidized due to electron donation from the phthalocyanine molecule to the surrounding nanotube. Trends seen in the spectra between CoPc and CoPc@MWNT can be calculated using density functional theory (DFT), which shows the molecular orbitals involved in different spectral features.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 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.

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