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Journal articles on the topic 'Tetratic Phase'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Terao, Takamichi. "Tetratic phase of Hertzian spheres: Monte Carlo simulation." Journal of Chemical Physics 139, no. 13 (2013): 134501. http://dx.doi.org/10.1063/1.4822101.

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2

WOJCIECHOWSKI, K. W., and D. FRENKEL. "TETRATIC PHASE IN THE PLANAR HARD SQUARE SYSTEM?" Computational Methods in Science and Technology 10, no. 2 (2004): 235–55. http://dx.doi.org/10.12921/cmst.2004.10.02.235-255.

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3

Liu, Huaqing, Yiwu Zong, Zhanglin Hou, Thomas G. Mason, and Kun Zhao. "Phase behavior of rotationally asymmetric Brownian kites containing 90° internal angles*." Chinese Physics B 30, no. 12 (2021): 124701. http://dx.doi.org/10.1088/1674-1056/ac306c.

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Previous Monte Carlo simulations have shown that ordered tetratic phases can emerge in a dense two-dimensional Brownian system of rotationally asymmetric hard kites having 90° internal angles. However, there have been no experimental investigations yet to compare with these simulation results. Here, we have fabricated two types of micron-sized kites having internal angles of 72°–90°–108°–90° and 72°–99°–90°–99°, respectively, and we have experimentally studied their phase behavior in two-dimensional systems. Interestingly and in contrast to the Monte Carlo simulations, the experimental results

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4

Martínez-Ratón, Yuri, and Enrique Velasco. "Effect of clustering on the orientational properties of a fluid of hard right isosceles triangles." Physics of Fluids 34, no. 3 (2022): 037110. http://dx.doi.org/10.1063/5.0085281.

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Recent studies have shown the fluid of hard right triangles to possess fourfold and quasi-eightfold (octatic) orientational symmetries. However, the standard density-functional theory for two-dimensional anisotropic fluids, based on two-body correlations, and an extension to incorporate three-body correlations fail to describe these symmetries. To explain the origin of octatic symmetry, we postulate strong particle clustering as a crucial ingredient. We use the scaled particle theory to analyze four binary mixtures of hard right triangles and squares, three of them being extreme models for a o

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5

Luo, Mingjian, Qingfa Wang, Xiangwen Zhang, and Bing Hu. "The Reactants’ Phase State: A Nonnegligible Factor in Tetralin Hydrogenation Catalysts Evaluation." International Journal of Chemical Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/405703.

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The effects of reactants’ phase states (gas-liquid and single gas phase) on tetralin hydrogenation were investigated in the fixed bed. The kinetics of tetralin hydrogenation under different phase states was analyzed. Results showed that, without phase transition, the tetralin conversion increased with the rise of temperature. However, it decreased dramatically around the dew point of the feed at which the reactants’ phase state transferred from gas-liquid phase into gas phase. It was also observed that the gas-liquid phase state was favorable to reduce the deactivation of catalyst in the tetra

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6

Kulkarni, Bheemashankar A., and A. Ganesan. "Solid-phase synthesis of tetramic acids." Tetrahedron Letters 39, no. 24 (1998): 4369–72. http://dx.doi.org/10.1016/s0040-4039(98)00703-5.

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7

Matthews, Jay, and Ralph A. Rivero. "Solid-Phase Synthesis of Substituted Tetramic Acids." Journal of Organic Chemistry 63, no. 14 (1998): 4808–10. http://dx.doi.org/10.1021/jo972234f.

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8

Endres, Helmut. "Two Modifications of Di[tetra(methylthio)tetrathiafulvalenium] Hexachlorodicuprate(II), [(TTM-TTF)+]2[Cu2Cl6]2-." Zeitschrift für Naturforschung B 42, no. 1 (1987): 5–11. http://dx.doi.org/10.1515/znb-1987-0103.

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Two crystalline phases of (TTM-TTF)2Cu2Cl6, TTM-TTF = tetra(methylthio)tetrathia- fulvalene, C10H12S8, have been obtained by interdiffusion of solutions of TTM-TTF and CuCl2. Both phases crystallize in the triclinic space group P 1̄ withZ = 1, Mr = 1117.28. Phase I: a = 8.591(3), b = 11.314(6), c = 11.868(6) Å, α = 63.44(3), β = 88.13(3), γ = 74.28(3)°, V = 988.0 Å3, dc = 1.88 g cm-3, final Rw= 0.033 for 4244 reflections and 211 variables. Phase II: a = 8.871(3), b = 10.632(3), c = 12.505(3) Å, α = 109.70(2), β = 106.10(3), γ = 102.63(3)°, V = 1003.2 Å3, dc = 1.85 gem-3, final Rw = 0.036 for 3

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9

OHTA, KAZUCHIKA, MASAHIRO ANDO, and IWAO YAMAMOTO. "Discotic Liquid Crystals of Transition metal Complexes 23: Synthesis and Mesomorphism of Tetrakis(3,4-di-n-alkylphenyl)porphyrin Derivatives and Their Metal Complexes." Journal of Porphyrins and Phthalocyanines 03, no. 04 (1999): 249–58. http://dx.doi.org/10.1002/(sici)1099-1409(199904)3:4<249::aid-jpp129>3.0.co;2-i.

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Five novel long-chain-substituted porphyrin derivatives, tetrakis(3,4-dialkylphenyl)porphyrins (abbreviated as (Cn)8 TPPH 2 (n = 8, 12, 18), ( C 18)8 TPPCu and ( C 18)8 TPPNi ), were synthesized and their mesomorphism was investigated. It was found that the (Cn)8 TPPH 2 (n = 8, 12), derivatives are isotropic liquids at room temperature and that each of the ( C 18)8 TPPM ( M ≡ H 2, Cu , Ni ) derivatives has two liquid crystal phases M1 and M2 and two unidentified phases X1 and X2. It was revealed by X-ray studies that the M2 phase is a discotic lamellar (DL) phase. Interestingly, these porphyri

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10

Liu, Zhanxiang, Xiuxiu Ruan, and Xian Huang. "A facile solid phase synthesis of tetramic acid." Bioorganic & Medicinal Chemistry Letters 13, no. 15 (2003): 2505–7. http://dx.doi.org/10.1016/s0960-894x(03)00502-x.

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11

Dehmlow, Eckehard V., and Michael Fründ. "NOTIZEN: Notiz zur vierfachen HX-Eliminierung aus peri-Tetrakis(chlormethyl)-aromaten unter Blitzvakuumthermolyse: Pyracylen / Note on Fourfold HX-Elimination from peri-Tetrakis(chloromethyl)-aromatic Compounds by Flash Vacuum Pyrolysis." Zeitschrift für Naturforschung B 47, no. 11 (1992): 1647–48. http://dx.doi.org/10.1515/znb-1992-1121.

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12

Schmetterer, Clemens, Herta Silvia Effenberger, Martin C. J. Marker та Hans Flandorfer. "Ni5-δSn4Zn (δ ∼ 0.25) from single-crystal data". Acta Crystallographica Section C Crystal Structure Communications 68, № 3 (2012): i9—i11. http://dx.doi.org/10.1107/s0108270112000455.

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Work on the ternary Ni–Sn–Zn phase diagram revealed the existence of the title compound pentanickel tetratin zinc, Ni3.17Sn2.67Zn0.67[Schmettereret al.(2012).Intermetallics, doi:10.1016/j.intermet.2011.05.025]. It crystallizes in the Ni5Ga3Ge2structure type (orthorhombic,Cmcm) and is related to the InNi2type (hexagonal,P63/mmc) of the neighbouring Ni3Sn2high-temperature (HT) phase, but is not a superstructure. The crystal structure was determined using single-crystal X-ray diffraction. Its homogeneity range was characterized using electron microprobe analysis. Phase analysis at various tempera

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13

Grzywa, Maciej, Christof Geßner, Björn Bredenkötter, et al. "Coordination frameworks assembled from CuII ions and H2-1,3-bdpb ligands: X-ray and magneto structural investigations, and catalytic activity in the aerobic oxidation of tetralin." Dalton Trans. 43, no. 44 (2014): 16846–56. http://dx.doi.org/10.1039/c4dt01880j.

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14

Schütznerová, Eva, Anna Krchňáková, and Viktor Krchňák. "Traceless Solid-Phase Synthesis of Ketones via Acid-Labile Enol Ethers: Application in the Synthesis of Natural Products and Derivatives." Molecules 24, no. 7 (2019): 1406. http://dx.doi.org/10.3390/molecules24071406.

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In solid-phase organic synthesis, Wang resin is traditionally used for the immobilization of acids, alcohols, phenols, and amines. We report the use of Wang resin for the traceless synthesis of ketones via acid-labile enol ethers. We demonstrate the practicality of this synthetic strategy on the solid-phase synthesis of pyrrolidine-2,4-diones, which represent the core structure of several natural products, including tetramic acid. Base-triggered condensation of pyrrolidine-2,4-diones yielded 4-hydroxy-1,1′,2′,5-tetrahydro-2H,5′H-[3,3′-bipyrrole]-2,5′-diones.

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15

Dinnebier, Robert E., Stefan Carlson, and Sander van Smaalen. "Bulk modulus and high-pressure crystal structures of tetrakis(trimethylsilyl)methane C[Si(CH3)3]4 determined by X-ray powder diffraction." Acta Crystallographica Section B Structural Science 56, no. 2 (2000): 310–16. http://dx.doi.org/10.1107/s0108768199014044.

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The pressure dependence of the crystal structure of cubic tetrakis(trimethylsilyl)methane C[Si(CH3)3]4 (TC) (P < 16.0 GPa, T = 298 K) is reported using high-resolution angle-dispersive X-ray powder diffraction. The compound has crystal structures with the molecules in a cubic-close-packed (c.c.p.) arrangement. It shows three phase transitions in the measured pressure range. At ambient conditions, TC has space group Fm{\bar 3}m (Z = 4) with a = 12.8902 (2) Å, V = 2141.8 (1) Å3 (phase I). Between 0 and 0.13 GPa TC exhibits a first-order phase transition into a structure with space group Pa{\b

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16

Dinnebier, Robert E., Piotr Bernatowicz, Xavier Helluy, et al. "Structure of compounds E(SnMe3)4 (E = Si, Ge) as seen by high-resolution X-ray powder diffraction and solid-state NMR." Acta Crystallographica Section B Structural Science 58, no. 1 (2001): 52–61. http://dx.doi.org/10.1107/s0108768101016688.

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The compounds tetrakis(trimethylstannyl)germane, Ge(SnMe3)4 (1), and tetrakis(trimethylstannyl)silane, Si(SnMe3)4 (2), have crystal structures with the quasispherical molecules in a closed-packed stacking. At room temperature both structures have the space group P\bar 1 (Z = 2) with a = 9.94457 (5), b = 14.52927 (8), c = 9.16021 (5) Å, α = 90.53390 (30), β = 111.73080 (30), γ = 90.0049 (4)°, and V = 1229.414 (12) Å3 for (1) and a = 9.92009 (7), b = 14.51029 (11), c = 9.13585 (7) Å, α = 90.4769 (4), β = 111.6724 (4), γ = 89.9877 (6)°, and V = 1222.037 (16) Å3 for (2). The molecules are found to

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17

Spiridonova, Tatyana S., Sergey F. Solodovnikov, Aleksandra A. Savina, et al. "Synthesis, crystal structures and properties of the new compounds K7–x Ag1+x (XO4)4 (X = Mo, W)." Acta Crystallographica Section C Structural Chemistry 73, no. 12 (2017): 1071–77. http://dx.doi.org/10.1107/s2053229617015674.

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Two new isostructural compounds, namely heptapotassium silver tetrakis(tetraoxomolybdate), K7–x Ag1+x (MoO4)4 (0 ≤ x ≤ 0.4), and heptapotassium silver tetrakis(tetraoxotungstate), K7–x Ag1+x (WO4)4 (0 ≤ x ≤ 0.4), have been synthesized and found to crystallize in the polar space group P63 mc (Z = 2) with the unit-cell dimensions a = 12.4188 (2) and c = 7.4338 (2) Å for K6.68Ag1.32(MoO4)4 (single-crystal data), and a = 12.4912 (5) and c = 7.4526 (3) Å for K7Ag(WO4)4 (Rietveld analysis data). Both structures represent a new structure type, with characteristic [K1(XO4)6] `pinwheels' of K1O6 octahe

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18

Tsang, Wing, and J. P. Cui. "Homogeneous gas-phase decyclization of tetralin and benzocyclobutene." Journal of the American Chemical Society 112, no. 5 (1990): 1665–71. http://dx.doi.org/10.1021/ja00161a001.

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19

Rautanen, P. A., J. R. Aittamaa, and A. O. I. Krause. "Liquid phase hydrogenation of tetralin on Ni/Al2O3." Chemical Engineering Science 56, no. 4 (2001): 1247–54. http://dx.doi.org/10.1016/s0009-2509(00)00346-8.

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20

Siddiquee, Muhammad N., Kaushik Sivaramakrishnan, Yucheng Wu, Arno de Klerk, and Neda Nazemifard. "A statistical approach dealing with multicollinearity among predictors in microfluidic reactor operation to control liquid-phase oxidation selectivity." Reaction Chemistry & Engineering 3, no. 6 (2018): 972–90. http://dx.doi.org/10.1039/c8re00134k.

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21

Decsi, Krammer, Hegedűs, et al. "Liver-on-a-Chip‒Magnetic Nanoparticle Bound Synthetic Metalloporphyrin-Catalyzed Biomimetic Oxidation of a Drug in a Magnechip Reactor." Micromachines 10, no. 10 (2019): 668. http://dx.doi.org/10.3390/mi10100668.

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Biomimetic oxidation of drugs catalyzed by metalloporphyrins can be a novel and promising way for the effective and sustainable synthesis of drug metabolites. The immobilization of 5,10,15,20-tetrakis(2,3,4,5,6-pentafluorophenyl)iron(II) porphyrin (FeTPFP) and 5,10,15,20-tetrakis-(4-sulfonatophenyl)iron(II) porphyrin (FeTSPP) via stable covalent or rapid ionic binding on aminopropyl-functionalized magnetic nanoparticles (MNPs-NH2) were developed. These immobilized catalysts could be efficiently applied for the synthesis of new pharmaceutically active derivatives and liver related phase I oxida

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22

Handlíř, Karel, Jaroslav Holeček, and Ludvík Beneš. "A study of the MgCl2-tetrahydrofurane system." Collection of Czechoslovak Chemical Communications 50, no. 11 (1985): 2422–30. http://dx.doi.org/10.1135/cccc19852422.

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The solid phase-solution equilibrium has been studied in the MgCl2-tetrahydrofurane system. Below 28 °C the saturated solution of magnesium chloride is in equilibrium with the solid phase composed of MgCl2.4C4H8O, whereas at higher temperatures the equilibrium solvate has the composition of MgCl2.2C4H8O. The solvate MgCl2.4C4H8O forms tetragonal crystals composed of molecules of trans-dichloro-tetrakis(tetrahydrofurane)magnesium(II) complex. The solvate MgCl2.2C4H8O most probably represents a polymeric catena-di-μ-dichloro-trans-bis(tetrahydrofurane)magnesium(II) complex.

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23

Laredo, Georgina C., Patricia Pérez-Romo, Pedro M. Vega-Merino, et al. "Effect of the catalytic system and operating conditions on BTX formation using tetralin as a model molecule." Applied Petrochemical Research 9, no. 3-4 (2019): 185–98. http://dx.doi.org/10.1007/s13203-019-00237-4.

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Abstract Light cycle oil (LCO) is an inexpensive feedstock for the production of high-added-commercial-value-mono-aromatic compounds such as benzene, toluene and xylenes (BTX). To extend the knowledge on the processing of LCO for BTX production, the hydrocracking reaction was studied using a commercial NiMo/Al2O3 catalyst, ZSM-5 zeolite and their mechanical mixtures (20/80, 30/70 and 50/50) for processing tetralin as model feedstock in a bench-scale-trickle-bed reactor at 450–500 °C, 3.9–5.9 MPa, 1.3 1/h and H2/feed volume ratio of 168–267 m3/m3. Accessible, well-dispersed and strong Brönsted

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24

Price, J., A. Marie Will, G. Paschaleris, and J. K. Chesters. "Identification of thiomolybdates in digesta and plasma from sheep after administration of 99Mo-labelled compounds into the rumen." British Journal of Nutrition 58, no. 1 (1987): 127–38. http://dx.doi.org/10.1079/bjn19870076.

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1. At 16 h after the rapid injection of 99Mo-labelled compounds into the rumen of sheep maintained on dried grass (6.2 mg molybdenum/kg dry matter (DM), 4.3 g sulphur/kg DM), labelled thiomolybdates associated with the digesta solids or bound to plasma macromolecular species were displaced from their carriers in vitro and identified by Sephadex G25 chromatography.2. After molybdate injection, the thiomolybdates displaced from rumen, duodenal and ileal solids were predominantly the trithio- and tetrathio- species. Dithiomolybdate was present to a relatively minor extent. Trace amounts of di- an

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25

Shimomura, Takuya, Masaaki Tabata, and Jun Nishimoto. "Equilibrium studies on lithium(I) transfer into ionic liquid with a water-soluble octabromoporphyrin (H2(OBTMPyP)4+) from aqueous phase." Journal of Porphyrins and Phthalocyanines 13, no. 08n09 (2009): 849–53. http://dx.doi.org/10.1142/s108842460900111x.

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A water-soluble octabromoporphyrin 2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin (H2(OBTMPyP)4+), H2P4+) and its lithium complex, Li(OBTMPyP)3+ , (LiP3+) , transferred quantitatively to an ionic liquid (IL), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM+PF6-) with no addition of other counter ions. The acid-dissociation constants of H2(OBTMPyP)4+ between aqueous and BMIM+PF6- phases were determined spectrophotometrically and found to be 10-7.67 and 10-11.33 at I = 0.1 for K a1,IL = [H+]aq[HP3+]IL/[H2P4+]IL and K a2,IL = [H+]aq[P2+]IL/[HP3+]IL , res

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26

Vitoria, Pablo, Ana Wéry, Leire San Felices, et al. "Reversible First-Order Single Crystal to Single Crystal Thermal Phase Transition in [(CH3)3CNH3]4[V4O12]." Materials 15, no. 16 (2022): 5663. http://dx.doi.org/10.3390/ma15165663.

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The well-known compound tetrakis(tert-butylammonium)-cyclo-tetrametavanadate (V), [(CH3)3CNH3]4[V4O12] (1h_RT), which crystallizes in the tetragonal I4/m space group, undergoes an irreversible solid state transformation upon heating, constituting one of the few examples in which the initial and the final stages are structurally characterized by sc-XRD. Now, we observed the ability of the same compound to undergo an additional single-crystal-to-single-crystal (SCSC) transformation upon thermal stimuli, but this time at low temperatures (153 K). Compound 1h_RT contains a discrete unprotonated [V

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27

Shimizu, Yo, Masaru Miya, Akira Nagata, et al. "Mesomorphic Phase Transitions of 5,10,15,20-Tetrakis(4-n-dodecylphenyl)porphyrin." Chemistry Letters 20, no. 1 (1991): 25–28. http://dx.doi.org/10.1246/cl.1991.25.

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28

Burrows, H. D., A. M. Rocha Gonsalves, M. L. P. Leitão, M. da G. Miguel, and M. M. Pereira. "Phase transitions and self-assembly in meso-tetrakis(undecyl)porphyrin." Supramolecular Science 4, no. 3-4 (1997): 241–46. http://dx.doi.org/10.1016/s0968-5677(97)00010-2.

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29

Santana, Roberto C., Siriporn Jongpatiwut, Walter E. Alvarez, and Daniel E. Resasco. "Gas-Phase Kinetic Studies of Tetralin Hydrogenation on Pt/Alumina." Industrial & Engineering Chemistry Research 44, no. 21 (2005): 7928–34. http://dx.doi.org/10.1021/ie0500873.

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30

SHAW, J., R. GAIKWAD, and D. STOWE. "Phase splitting of pyrene-tetralin mixtures under coal liquefaction conditions." Fuel 67, no. 11 (1988): 1554–59. http://dx.doi.org/10.1016/0016-2361(88)90075-0.

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31

Li, Rong, Chunyue Pan, Shaohui Xiong, et al. "Highly Disordered Crystalline-Phase Transition of Tetrakis(1-adamantanecarboxymethyl)methane." Bulletin of the Chemical Society of Japan 85, no. 4 (2012): 481–86. http://dx.doi.org/10.1246/bcsj.20110345.

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32

Urazov, Khoshim Kh, Nikita N. Sviridenko, Yuliya A. Iovik, et al. "Effect of Hydrogen-Donor of Heavy Crude Oil Catalytic Aquathermolysis in the Presence of a Nickel-Based Catalyst." Catalysts 12, no. 10 (2022): 1154. http://dx.doi.org/10.3390/catal12101154.

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The transformations of oil components from the Zyuzeevskoye field during catalytic aquathermolysis in the presence of a nickel-containing catalyst precursor and hydrogen donors were studied. It was found that the yield of gasoline and diesel fractions increased by more than 36% in the case of catalytic aquathermolysis in the presence of tetralin. The maximum conversion of asphaltenes was achieved with a simultaneous slowing down of coke formation by four times. The calculation of the structural-group parameters of initial asphaltenes and the products of thermal cracking and catalytic aquatherm

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33

Burmistrov, Vladimir A., Alexander S. Semeikin, Gregory V. Kuvshinov, et al. "Ni(II) complex of octasubstituted tetraphenylporphine as a stationary phase for gas chromatography." Journal of Porphyrins and Phthalocyanines 21, no. 02 (2017): 103–9. http://dx.doi.org/10.1142/s1088424617500110.

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The Ni(II) complex of 5,10,15,20-tetrakis[3[Formula: see text],5[Formula: see text]-di(2[Formula: see text]-methylbutyloxy)phenyl]porphine was synthesized and characterized by 1H NMR, UV-vis spectroscopy and MALDI-TOF mass-spectrometry. The stationary phase on the base of synthesized Ni(II) complex was used for chromatographic separation of isomeric methyl- and dimethylpyridines. The high structural selectivity of this sorbent was explained by giving the results of DFT calculation of pyridine derivatives axial complexes with porphyrin Ni(II) complexes.

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34

Shephard, G. S., P. G. Thiel, E. W. Sydenham, R. Vleggaar, and W. F. O. Marasas. "Reversed-phase high-performance liquid chromatography of tenuazonic acid and related tetramic acids." Journal of Chromatography B: Biomedical Sciences and Applications 566, no. 1 (1991): 195–205. http://dx.doi.org/10.1016/0378-4347(91)80124-u.

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35

Chawla, Raman, Rajesh Arora, Shikha Singh, et al. "Podophyllum hexandrum Offers Radioprotection by Modulating Free Radical Flux: Role of Aryl-Tetralin Lignans." Evidence-Based Complementary and Alternative Medicine 3, no. 4 (2006): 503–11. http://dx.doi.org/10.1093/ecam/nel037.

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We have evaluated the effect of variation in aryl-tetralin lignans on the radioprotective properties ofPodophyllum hexandrum. Two fractionated fractions ofP. hexandrum[methanolic (S1) and chloroform fractions (S2)], with varying aryl-tetralin lignan content were utilized for the present study. The peroxyl ion scavenging potentials of S1 and S2 were found to be comparable [i.e. 45.88% (S1) and 41% (S2)] after a 48 h interval in a time-dependent study, whereas in a 2 h study, S2 exhibited significant (P< 0.05) antioxidant activity in different metal ion + flux states. In the aqueous phase, S2

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36

Dinnebier, Robert E., Wayne A. Dollase, Xavier Helluy, et al. "Order–disorder phenomena determined by high-resolution powder diffraction: the structures of tetrakis(trimethylsilyl)methane C[Si(CH3)3]4 and tetrakis(trimethylsilyl)silane Si[Si(CH3)3]4." Acta Crystallographica Section B Structural Science 55, no. 6 (1999): 1014–29. http://dx.doi.org/10.1107/s0108768199006126.

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The compounds tetrakis(trimethylsilyl)methane C[Si(CH3)3]4 (TC) and tetrakis(trimethylsilyl)silane Si[Si(CH3)3]4 (TSi) have crystal structures with the molecules in a cubic closed-packed (c.c.p.) stacking. At room temperature both structures have space group Fm{\bar 3}m (Z = 4) with a = 13.5218 (1) Å, V = 2472.3 (1) Å3 for TSi, and a = 12.8902 (2) Å, V = 2141.8 (1) Å3 for TC. X-ray scattering data can be described by a molecule with approximately sixfold orientational disorder, ruling out a structure with free rotating molecules. Upon cooling, TSi exhibits a first-order phase transition at T c

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37

Feldberg, Liron, and Yoel Sasson. "Copper catalyzed oxidation of tetralin to 1-(tert-butylperoxy)-tetralin by aqueous tert-butylhydroperoxide under phase transfer conditions." Tetrahedron Letters 37, no. 12 (1996): 2063–66. http://dx.doi.org/10.1016/0040-4039(96)00192-x.

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38

Ferreira, Gabriel, Charles Carvalho, and Shirley Nakagaki. "Studies of the Catalytic Activity of Iron (III) Porphyrins for the Protection of Carbonyl Groups in Homogeneous Media." Catalysts 9, no. 4 (2019): 334. http://dx.doi.org/10.3390/catal9040334.

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The protection of carbonyl groups that produce acetal products is a key reaction in fine chemistry due to the high reactivity of aldehydes and ketones in certain media. This process can be catalyzed by protic or Lewis acids. Since metalloporphyrins often possess free axial positions in the central metal, they can be applied as Lewis acid catalysts, allowing the additional coordination of substrates. Therefore, three ferric complexes were selected to be evaluated as catalysts for the acetalization of benzaldehyde with ethanol and triethyl orthoformate (TEOF) in the homogeneous phase: (i) 5,10,1

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39

Tverdova, Natalia V., Nina I. Giricheva, Denis S. Savelyev, et al. "Molecular Structure of Tetrakis(1,2,5-thiadiazolo)-porphyrazinatozinc(II) in Gaseous Phase." Macroheterocycles 10, no. 1 (2017): 27–30. http://dx.doi.org/10.6060/mhc170399g.

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40

Wéry, A. S. J., J. M. Gutiérrez-Zorrilla, A. Luque, M. Ugalde, and P. Román. "Phase Transitions in Metavanadates. Polymerization of Tetrakis(tert-Butylammonium)-cyclo-Tetrametavanadate." Chemistry of Materials 8, no. 2 (1996): 408–13. http://dx.doi.org/10.1021/cm950342h.

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41

Igglessi-Markopoulou, Olga, Kyriakos C. Prousis, and Anastasia Detsi. "A Traceless Solid-Phase Approach to Functionalized Tetramic Acids and 2-Amino-4-pyrrolinones." Synlett, no. 18 (2005): 2763–66. http://dx.doi.org/10.1055/s-2005-918941.

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42

O'Driscoll, Benjamin M. D., Jeremy L. Ruggles, Garry J. Foran, and Ian R. Gentle. "Thin Films of a Tetracationic Porphyrin." Australian Journal of Chemistry 56, no. 10 (2003): 1059. http://dx.doi.org/10.1071/ch03123.

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Langmuir–Blodgett films of the tetracationic porphyrin tetrakis(octadecyl-4-pyridinium)porphinatozinc(II) bromide transferred from subphases containing different salts were studied using X-ray photoelectron spectroscopy (XPS) and X-ray reflectometry. In contrast to previous results at the air/water interface, we found that the porphyrin adopted a fixed conformation at the air/solid interface regardless of composition of the subphase or whether the films were transferred above or below the primary phase transition. This conformation was assigned to the formation of an interdigitated bilayer str

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43

Moshrefi, Reza, and Talia Jane Stockmann. "Electrodeless Synthesis of Low Dispersity Au Nanoparticles and Nanoclusters at an Immiscible Micro Water/Ionic Liquid Interface." Nanomaterials 12, no. 16 (2022): 2748. http://dx.doi.org/10.3390/nano12162748.

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Owing to their biocompatibility, optical, and catalytic properties, Au nanoparticles (NPs) have been the subject of much research. Since smaller NPs have enhanced catalytic properties and NP morphology greatly impacts their effectiveness, controlled and reproducible methods of generating Au NPs are still being sought. Herein, Au NPs were electrochemically generated at a water|ionic liquid (w|IL) immiscible micro-interface, 25 µm in diameter, using a redox active IL and compared to results at a water|oil (w|o) one. The liquid|liquid interface is advantageous as it is pristine and highly reprodu

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44

Jiang, Quan, Hai-Yang Hu, Can-Cheng Guo, Qiang Liu, Jian-Xin Song, and Qing-Hong Li. "Aerobic liquid-phase oxidation of p-xylene over metalloporphyrins." Journal of Porphyrins and Phthalocyanines 11, no. 07 (2007): 524–30. http://dx.doi.org/10.1142/s1088424607000618.

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The five metalloporphyrins ( T (p- Cl ) PPM , M = Fe , Mn , Co , Cu , Zn ) with different metal nuclei were synthesized, and their catalytic aerobic liquid-phase oxidations of p-xylene into p-toluic acid, p-toluic aldehyde and terephthalic acid using a low concentration of acetic acid as solvent without any halide additives, were studied. The p-xylene conversions and the oxidation product distributions were found to be affected by the structures and concentration of the metalloporphyrins as well as the reaction parameters such as time, temperature and air pressure. The formation of some interm

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Rao, C. N. R., and Ram Seshadri. "Phase Transitions, Superconductivity, and Ferromagnetism in Fullerene Systems." MRS Bulletin 19, no. 11 (1994): 28–30. http://dx.doi.org/10.1557/s0883769400048375.

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By virtue of their unique structures, fullerenes exhibit novel chemical transformations. Particularly pertinent to this article are the interesting properties exhibited by fullerenes in the solid state. These molecules are spherical or near-spherical in shape. Molecules with high point-group symmetry, which are not bound strongly in the solid state, tend to crystallize into structures with long-range periodicity of the molecular centers of mass, but the molecular orientations are random or even dynamically disordered. When dynamically disordered, themolecules rotate about some preferred axis.

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46

Gimenez Molina, Alejandro, Amit M. Jabgunde, Pasi Virta, and Harri Lönnberg. "Solution phase synthesis of short oligoribonucleotides on a precipitative tetrapodal support." Beilstein Journal of Organic Chemistry 10 (September 29, 2014): 2279–85. http://dx.doi.org/10.3762/bjoc.10.237.

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An effective method for the synthesis of short oligoribonucleotides in solution has been elaborated. Novel 2'-O-(2-cyanoethyl)-5'-O-(1-methoxy-1-methylethyl) protected ribonucleoside 3'-phosphoramidites have been prepared and their usefulness as building blocks in RNA synthesis on a soluble support has been demonstrated. As a proof of concept, a pentameric oligoribonucleotide, 3'-UUGCA-5', has been prepared on a precipitative tetrapodal tetrakis(4-azidomethylphenyl)pentaerythritol support. The 3'-terminal nucleoside was coupled to the support as a 3'-O-(4-pentynoyl) derivative by Cu(I) promote

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Nakano, Chikako, Kenichi Imaeda, Takehiko Mori, et al. "Phase transition of tetrakis(octylthio)tetrathiafulvalene (TTC8–TTF) and crystal structure analysis." J. Mater. Chem. 1, no. 1 (1991): 37–41. http://dx.doi.org/10.1039/jm9910100037.

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Shimizu, Yo, Atsushi Ishikawa, and Shigekazu Kusabayashi. "PHOTOCONDUCTING BEHAVIOR IN RELATION TO PHASE TRANSITIONS. 5,10,15,20-TETRAKIS(4-PENTADECYLPHENYL)PORPHYRIN." Chemistry Letters 15, no. 7 (1986): 1041–44. http://dx.doi.org/10.1246/cl.1986.1041.

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Ramasseul, René, Pascale Maldivi, Jean-Claude Marchon, Mark Taylor, and Daniel Guillon. "Phase transitions of long chain esters of meso-tetrakis(para-carboxyphenyl)porphyrin." Liquid Crystals 13, no. 5 (1993): 729–33. http://dx.doi.org/10.1080/02678299308026345.

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Fulem, Michal, and Květoslav Růžička. "Vapor pressure, heat capacities, and phase transitions of tetrakis(tert-butoxy)hafnium." Fluid Phase Equilibria 311 (December 2011): 25–29. http://dx.doi.org/10.1016/j.fluid.2011.08.011.

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