Molecular motions and phase transitions in halogen-bridged one-dimensional complexes [Pt(en)2][PtX2(en)2](ClO4)4 (X: I, Br)
文献信息
Noriyoshi Kimura, Toru Hachisuka, Yukitaka Nakano, Ryuichi Ikeda
1H and 2H NMR and thermal measurements were performed on crystalline [Pt(en)2][PtI2(en)2](ClO4)4 in which protonated and partially deuterated ethylenediamines H2N(CH2)2NH2, D2N(CH2)2ND2 and H2N(CD2)2NH2 were used as the ligand “en”. A metastable crystalline phase of [Pt(en)2][PtBr2(en)2](ClO4)4 with conformational disorder of the en chelate rings was shown to have a different phase transition at ca. 380 K to the stable crystalline form of the ordered structure. NMR spectra and relaxation times showed that the distribution of the en conformation is not static but dynamic in both I and Br complexes where a puckering motion of en chelate rings was shown to take place between asymmetric potential wells.
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Physical Chemistry Chemical Physics

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.














