Ternary Bismuth Chalcogenides for Thermoelectric Applications. Synthesis and Charge Transport Properties of New Compounds in the K-BI-S System.

1995 ◽  
Vol 410 ◽  
Author(s):  
Mercouri G. Kanatzidis ◽  
Timothy J. McCarthy ◽  
Troy A. Tanzer ◽  
Li-H. Chen ◽  
Tim Hogan ◽  
...  
Keyword(s):  
Optical Properties ◽  
High Temperature ◽  
Charge Transport ◽  
Three Dimensional ◽  
Bismuth Atom ◽  
Electrical And Optical Properties ◽  
Bismuth Chalcogenides ◽  
Dimensional Network ◽  
Ternary Sulfide ◽  
New Compounds

ABSTRACTKBi6.33S10 and K2Bi8S13 were synthesized by the direct combination of K2S/Bi2S3 at high temperature (>700°C). The reaction of K2S/3.3Bi2S3 at 800°C revealed the presence of a new ternary sulfide KBi6.33S10 (I) (92% yield). The structure consists of blocks of Bi2Te3 and Cdl2-type units that are connected to form a three-dimensional network with K+ ions located in the channels that run along the b-axis. The same reaction but with a different ratio, at 750°C, gave the new ternary sulfide K2Bi8S13 (II) (94% yield). The structure of the shiny rod-like crystals is closely related to that of I. As in I, it also consists of Bi2Te3 and Cdl2-type fragments that connect to form K+-filled channels. The two potassium atoms and one bismuth atom are disordered over three sites. Some preliminary electrical and optical properties of these materials are discussed.

Electrical and optical properties improvement of GeSn layers formed at high temperature under well-controlled Sn migration

2017 ◽  
Vol 70 ◽  
pp. 139-144 ◽  
Author(s):  
Noriyuki Taoka ◽  
Giovanni Capellini ◽  
Viktoria Schlykow ◽  
Michele Montanari ◽  
Peter Zaumseil ◽  
...  
Keyword(s):  
Optical Properties ◽  
High Temperature ◽  
Electrical And Optical Properties

scholarly journals The phase transition of rubidium hydrogen carbonate, RbHCO3

2017 ◽  
Vol 73 (7) ◽  
pp. 975-979 ◽  
Author(s):  
Carla Larvor ◽  
Berthold Stöger
Keyword(s):  
Phase Transition ◽  
Hydrogen Bonding ◽  
High Temperature ◽  
Hydrogen Atom ◽  
Low Temperature ◽  
Three Dimensional ◽  
Disorder Phase Transition ◽  
Dimensional Network ◽  
Hydrogen Carbonate ◽  
Index 2

Rubidium hydrogen carbonate, RbHCO3, features an order/disorder phase transition atTC= 245 K from the high-temperature (HT) disorderedC2/mmodification to the low-temperature (LT)C-1 modification. The crystal structures are characterized by [HCO3]22−pairs of hydrogen carbonate groups connected by strong hydrogen bonding. The [HCO3]22−pairs are connected by Rb+cations into a three-dimensional network. In HT-RbHCO3, the hydrogen atom is disordered. In LT-RbHCO3, ordering of the hydrogen atom leads to atranslationengleichesymmetry reduction of index 2. The lost reflections and rotations are retained as twin operations.

Flexible h-BN foam sheets for multifunctional electronic packaging materials with ultrahigh thermostability

Soft Matter ◽  
2018 ◽  
Vol 14 (20) ◽  
pp. 4204-4212 ◽  
Author(s):  
Deul Kim ◽  
Artavazd Kirakosyan ◽  
Jae Woong Lee ◽  
Jong-Ryul Jeong ◽  
Jihoon Choi
Keyword(s):  
Thermal Conductivity ◽  
High Temperature ◽  
Network Structure ◽  
Electronic Packaging ◽  
Three Dimensional ◽  
Packaging Materials ◽  
Dimensional Network ◽  
Thermo Stability ◽  
Enhanced Thermal Conductivity

Flexible and robust h-BN foam sheets with a three-dimensional network structure exhibit a much enhanced thermal conductivity as well as thermo-stability at high temperature.

Electrical and optical properties improvement of GeSn layers formed at high temperature under well-controlled Sn migration

2017 ◽  
Vol 57 ◽  
pp. 48-53 ◽  
Author(s):  
Noriyuki Taoka ◽  
Giovanni Capellini ◽  
Viktoria Schlykow ◽  
Michele Montanari ◽  
Peter Zaumseil ◽  
...  
Keyword(s):  
Optical Properties ◽  
High Temperature ◽  
Electrical And Optical Properties

Tris(pyrazolyl)methane and 1,8-naphthalimide-functionalized dialkynylgold(I) anionic complexes

2013 ◽  
Vol 69 (9) ◽  
pp. 954-958 ◽  
Author(s):  
Daniel L. Reger ◽  
Mark D. Smith ◽  
Radu F. Semeniuc
Keyword(s):  
Triple Bond ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Stacking Interactions ◽  
Deuterated Chloroform ◽  
Dimensional Network ◽  
Anionic Complexes ◽  
Solvent Molecules ◽  
New Compounds ◽  
Derivatives Of

The reaction of tetrapropylammonium bis(acetylacetonato)gold(I) with alkyne derivatives of the tris(pyrazolyl)methane and 1,8-naphthalimide functional groups yielded two new compounds, both bridged by the linear C[triple-bond]C—Au—C[triple-bond]C spacer, namely tetrapropylammonium bis{3-[2,2,2-tris(1H-pyrazol-1-yl)ethoxy]prop-1-yn-1-yl}aurate(I), (C16H28N)[Au(C14H13N6O)2], and tetrapropylammonium {η2-μ-3-[2,4-dioxo-3-azatricyclo[7.3.1.05,13]trideca-1(12),5,7,9(13),10-pentaen-3-yl]prop-1-yn-yl}bis{3-[2,4-dioxo-3-azatricyclo[7.3.1.05,13]trideca-1(12),5,7,9(13),10-pentaen-3-yl]prop-1-yn-1-yl}digold(I) deuterochloroform disolvate, (C16H28N)[Au2(C15H8NO2)3]·2CDCl3. The alkyne-functionalized scorpionate ligand [Au{C[triple-bond]CCH2OCH2C(pz)3}2]−features two potentially tridentate tris(pyrazolyl)methane donor groups oriented in a `trans' position relative to the C[triple-bond]C—Au—C[triple-bond]C spacer. The naphthalimide-containing compound comprises a σ-bonded NI—CH2—C[triple-bond]C—Au—C[triple-bond]C—CH2—NI unit (NI is the naphthalimide group) π-coordinated to an NI—CH2—C[triple-bond]C—Au neutral fragment. The crystal packing of this compound is supported by π–π stacking interactions of the NI unit, generating a three-dimensional network containing channels accommodating the tetrapropylammonium cations and deuterated chloroform solvent molecules.

scholarly journals Comparison of the crystal structures of the low- and high-temperature forms of bis[4-(dimethylamino)pyridine]dithiocyanatocobalt(II)

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Christoph Krebs ◽  
Inke Jess ◽  
Christian Näther
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Low Temperature ◽  
Hydrogen Bonds ◽  
Room Temperature ◽  
Three Dimensional ◽  
Monoclinic Space Group ◽  
Temperature Form ◽  
Dimensional Network ◽  
High Temperature Form

Single crystals of the high-temperature form I of [Co(NCS)2(DMAP)2] (DMAP = 4-dimethylaminopyridine, C7H10N2) were obtained accidentally by the reaction of Co(NCS)2 with DMAP at slightly elevated temperatures under kinetic control. This modification crystallizes in the monoclinic space group P21/m and is isotypic with the corresponding Zn compound. The asymmetric unit consists of one crystallographically independent Co cation and two crystallographically independent thiocyanate anions that are located on a crystallographic mirror plane and one DMAP ligand (general position). In its crystal structure the discrete complexes are linked by C—H...S hydrogen bonds into a three-dimensional network. For comparison, the crystal structure of the known low-temperature form II, which is already thermodynamically stable at room temperature, was redetermined at the same temperature. In this polymorph the complexes are connected by C—H...S and C—H...N hydrogen bonds into a three-dimensional network. At 100 K the density of the high-temperature form I (ρ = 1.457 g cm−3) is lower than that of the low-temperature form II (ρ = 1.462 g cm−3), which is in contrast to the values determined by XRPD at room temperature. Therefore, these two forms represent an exception to the Kitaigorodskii density rule, for which extensive intermolecular hydrogen bonding in form II might be responsible.

scholarly journals Nonlinear optical organic–inorganic crystals: synthesis, structural analysis and verification of harmonic generation in tri-(o-chloroanilinium nitrate)

2019 ◽  
Vol 75 (1) ◽  
pp. 107-114 ◽  
Author(s):  
Hamza Athmani ◽  
Christian Kijatkin ◽  
Rim Benali-Cherif ◽  
Sébastien Pillet ◽  
Dominik Schaniel ◽  
...  
Keyword(s):  
Optical Properties ◽  
Structural Analysis ◽  
Intermolecular Interactions ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Three Dimensional ◽  
Nonlinear Optical Properties ◽  
Dimensional Network ◽  
Hybrid Crystals ◽  
Network Of Hydrogen Bonds

The structural and nonlinear optical properties of a new anilinium hybrid crystal of chemical formula (C6H7NCl+·NO3 −)3 have been investigated. The crystal structure was determined from single-crystal X-ray diffraction measurements performed at a temperature of 100 K which show that the compound crystallizes in a noncentrosymmetric space group (Pna21). The structural analysis was coupled with Hirshfeld surface analysis to evaluate the contribution of the different intermolecular interactions to the formation of supramolecular assemblies in the solid state that exhibit nonlinear optical features. This analysis reveals that the studied compound is characterized by a three-dimensional network of hydrogen bonds and the main contributions are provided by the O...H, C...H, H...H and Cl...H interactions, which alone represent ∼85% of the total contributions to the Hirshfeld surfaces. It is noteworthy that the halogen...H contributions are quite comparable with those of the H...H contacts. The nonlinear optical properties were investigated by nonlinear diffuse femtosecond-pulse reflectometry and the obtained results were compared with those of the reference material LiNbO3. The hybrid crystals exhibit notable second (SHG) and third (THG) harmonic generation which confirms its polarity is generated by the different intermolecular interactions. These measurements also highlight that the THG signal of the new anilinium compound normalized to its SHG counterpart is more pronounced than for LiNbO3.

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