A theoretical study of molecular titanium oxide clusters: structure, bonding, vibrations and stability

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发布日期
DOI 10.1039/A904269E
影响因子 3.676
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摘要

First principles quantum chemical calculations at the HF, MP2 and B3LYP levels of theory, using the LANL2DZ basis set, were used to explore the potential energy hypersurfaces (PESs) of ionic titanium(IV) oxide clusters of molecular dimensions, formulated as TiO32-, Ti2O32+, Ti2O52- and Ti2O64-. The neutral protonated species of the anions were also investigated at the same level of theory. The energetics of all topomers corresponding to global or local minima and saddle points in the potential energy hypersurfaces were computed at the more sophisticated QCISD(T) level. The protonation of the anionic metal oxide clusters produces neutral species and the computed proton affinities were in the range 1720–2000 kJ mol-1. The computed structural, energetic and spectroscopic properties of the clusters are in line with available experimental and theoretical results. The formation processess of the Ti2O52- dianion from TiO32- and TiO2 species and the Ti2O64- tetraanion by dimerization of the TiO32- species are predicted to be exothermic and endothermic, respectively.

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来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 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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