NMR study of Ba8Cu5SixGe41−x clathrate semiconductors

文献情報

出版日 2015-06-01

DOI 10.1039/C5CP02575C

インパクトファクター 3.676

著者

Ali A. Sirusi, Xinlin Yan, Silke Paschen

原文を見る

要旨

We have performed 63Cu, 65Cu, and 137Ba NMR on Ba8Cu5SixGe41−x, a series of intermetallic clathrates known for their potential as thermoelectric materials, in order to investigate the electronic behavior of the samples. The spectra and spin–lattice relaxation times were measured at 77 K and 290 K for the entire composition range 0 ≤ x ≤ 41. Magnetic and quadrupole shifts and relaxation rates of the Cu NMR data were extracted, and thereby carrier-induced metallic contributions identified. The observed shifts change in a nonlinear way with increasing Si substitution: from x = 0 to about 20 the shifts are essentially constant, while approaching x = 41 they increase rapidly. At the same time, Ba NMR data indicate greater Ba-site participation in the conduction band in Ba8Cu5Si41 than in Ba8Cu5Ge41. The results indicate surprisingly little change in electronic features vs. Si content for most of the composition range, while Ba8Cu5Si41 exhibits enhanced hybridization and a more metallic framework than Ba8Cu5Ge41.

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.

NMR study of Ba8Cu5SixGe41−x clathrate semiconductors

文献情報

おすすめジャーナル

関連文献

Hydration capabilities and structures of carbonyl and ether groups in poly(3-(2-methoxyethyl)-N-vinyl-2-pyrrolidone) film

Synthesis, assembly, and cross-linking of polymeramphiphilesin situ: polyurethane–polylactide core–shell particles

N-Acetoxy-phthalimide (NAPI) as a new H-abstracting agent at high temperature: application to the melt functionalization of polyethylene

New insights into radical and cationic polymerizations upon visible light exposure: role of novel photoinitiator systems based on the pyrene chromophore

Activation of carbonyl bonds by quaternary ammoniums and a (Na+:crown-ether) complex: investigation of the ring-opening polymerization of cyclic esters

Synthesis of new n-type isoindigo copolymers

A colorless functional polydopamine thin layer as a basis for polymer capsules

Intracellular pH-sensitive supramolecular amphiphiles based on host–guest recognition between benzimidazole and β-cyclodextrin as potential drug delivery vehicles

The importance of ligand reactions in Cu(0)-mediated living radical polymerisation of acrylates

One-pot controlled synthesis of double thermoresponsive N-vinylcaprolactam-based copolymers with tunable LCSTs

こちらもおすすめ

2-ヒドロキシ-5-ニトロベンジンブロモイドの代替品はありますか？

N-(2-ブロモフェニル)-1-チロール-3-オキソ-3-(ピペリジニル)プロペン-2-イル)ベンゼンアミドを取り扱う際の実験室安全事項は何ですか？

1,3プロパンジオール,2-[2-(2アミノ-6クロロ-9Hピリミジン-9-イル)エチル-1,1,2,2-D4]-2,3-ジアセタートの市場動向や研究トレンドはどうですか？

安息香の代替品はありますか？

Succinimidyl-alanyl-phenylalanyl-prolyl-phenylalanine 4-nitroanilide はどの業界で使用されていますか？

メチル6-アミノ-5-クロロピリジン-2-カーボイル酸について、適用される法規ガイドラインは何ですか？

エチル4-(シクロ Pentagonyl)アミノ-2-メチル硫化基ピリミジン-5-カルボキシレートを取り扱う際の実験室安全事項は何ですか？

（S）-3-ベンZYルピペリジン塩酸塩とは何ですか？

3,5-二甲基金剛胺の主な用途は何ですか？

ビス(4-メチル-2-ペンチル)フェニルカルボン酸エステルの代替品はありますか？

掲載誌

Physical Chemistry Chemical Physics

おすすめ化合物

(2-Bromo-5-chlorophenyl)boronic acid

2-Iodo-4-methoxy-1-(methylsulfonyl)benzene

Methyl 4-({[(2-methyl-2-propanyl)oxy]carbonyl}amino)bicyclo[2.2.2]octane-1-carboxylate

Atrial natriuretic factor (5-27)

6-Benzyl-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridin-3(2H)-one

おすすめサプライヤー