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Relevant bibliographies by topics / Pyrophosphoric acid

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Academic literature on the topic 'Pyrophosphoric acid'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Pyrophosphoric acid"

1

Grover, Liam M., Uwe Gbureck, David Farrar, and J. E. Barralet. "The Mechanical Properties and Microstructures of Cement Formed from Pyrophosphoric and Orthophosphoric Acids." Key Engineering Materials 284-286 (April 2005): 125–28. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.125.

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In this study the setting times, compressive strengths and microstructures of cements formed using pyrophosphoric acid solution and b-tricalcium phosphate (β-TCP; Ca3(PO4)2) were compared with those of cement formed using orthophosphoric acid solution and b-TCP. It was found that cement formed using pyrophosphoric acid solution set more slowly than that formed using orthophosphoric acid and could be mixed to a higher powder to liquid ratio, facilitating the production of cement exhibiting compressive strengths, without pre-compaction, as high as 25 MPa. The use of pyrophosphoric acid as oppose

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2

Nakajima, Daiki, Tatsuya Kikuchi, Shungo Natsui, and Ryosuke O. Suzuki. "Advancing and receding contact angle investigations for highly sticky and slippery aluminum surfaces fabricated from nanostructured anodic oxide." RSC Advances 8, no. 65 (2018): 37315–23. http://dx.doi.org/10.1039/c8ra07712f.

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3

Tanaka, Hidekazu, Masakazu Futaoka, and Ryozi Hino. "Surface modification of calcium hydroxyapatite with pyrophosphoric acid." Journal of Colloid and Interface Science 269, no. 2 (2004): 358–63. http://dx.doi.org/10.1016/j.jcis.2003.07.039.

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4

Liu, Xiaohai, Harry Adams, and G. Michael Blackburn. "Synthesis of novel ‘supercharged’ analogues of pyrophosphoric acid." Chemical Communications, no. 23 (1998): 2619–20. http://dx.doi.org/10.1039/a807162d.

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5

Yamamoto, K., and T. Taniuchi. "Characteristics of pyrophosphoric acid proton‐exchanged waveguides in LiNbO3." Journal of Applied Physics 70, no. 11 (1991): 6663–68. http://dx.doi.org/10.1063/1.349838.

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6

Qin, Xian Ye, Biao Liu, Bing Han, Wen Bo Zhao, Shui Sheng Wu, and Pei Chao Lian. "Synthesis of Diethyl Carbonate from Ethyl Carbamate and Ethanol with Acid as Catalyst." Advanced Materials Research 821-822 (September 2013): 1081–84. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1081.

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The catalytic activity of many Lewis and Bronsted acid for the synthesis of diethyl carbonate (DEC) from ethyl carbamate (EC) and ethanol was evaluated in a bath reactor. Pyrophosphoric acid (H4P7O2) which showed the best activity was selected to further investigate the effect of reaction conditions, such as reaction temperature, catalyst dose and reaction time, on the yield of DEC. Under the optimal conditions, DEC yield can reach 29.1%.

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7

Peranidze, Kristina, Tatiana V. Safronova, Yaroslav Filippov, Gilyana Kazakova, Tatiana Shatalova, and Julietta V. Rau. "Powders Based on Ca2P2O7-CaCO3-H2O System as Model Objects for the Development of Bioceramics." Ceramics 5, no. 3 (2022): 423–34. http://dx.doi.org/10.3390/ceramics5030032.

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Nanoscale powders of hydrated Ca2P2O7, CaCO3, and a product of mixed-anionic composition containing P2O74− and CO32− anions were synthesized from aqueous solutions of Ca(CH3COO)2, pyrophosphoric acid (H4P2O7), and/or (NH4)2CO3. Pyrophosphoric acid was previously obtained on the basis of the ion exchange process from Na4P2O7 solution and H+-cationite resin for further introduction into the reactions as an anionic precursor. The phase composition of powders after the syntheses was represented by bioresorbable phases of X-ray amorphous hydrated Ca2P2O7 phase, calcite and vaterite polymorphs of Ca

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8

Sakakura, Akira, Manabu Hatano, Kazuaki Ishihara, et al. "Chiral Pyrophosphoric Acid Catalysts for the para-Selective and Enantioselective Aza-Friedel–Crafts Reaction of Phenols." Synthesis 50, no. 23 (2018): 4577–90. http://dx.doi.org/10.1055/s-0037-1610250.

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Chiral BINOL-derived pyrophosphoric acid catalysts were developed and used for the regio- and enantioselective aza-Friedel–Crafts reaction of phenols with aldimines. ortho/para-Directing phenols could react at the para-position selectively with moderate to good enantioselectivities. Moreover, the gram-scale transformation of a product into the key intermediate for the antifungal agent (R)-bifonazole was demonstrated.

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9

Nakajima, Daiki, Tatsuya Kikuchi, Taiki Yoshioka, et al. "A Superhydrophilic Aluminum Surface with Fast Water Evaporation Based on Anodic Alumina Bundle Structures via Anodizing in Pyrophosphoric Acid." Materials 12, no. 21 (2019): 3497. http://dx.doi.org/10.3390/ma12213497.

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A superhydrophilic aluminum surface with fast water evaporation based on nanostructured aluminum oxide was fabricated via anodizing in pyrophosphoric acid. Anodizing aluminum in pyrophosphoric acid caused the successive formation of a barrier oxide film, a porous oxide film, pyramidal bundle structures with alumina nanofibers, and completely bent nanofibers. During the water contact angle measurements at 1 s after the water droplet was placed on the anodized surface, the contact angle rapidly decreased to less than 10°, and superhydrophilic behavior with the lowest contact angle measuring 2.0°

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10

Tanaka, Hidekazu, Masakazu Futaoka, Ryozi Hino, Kazuhiko Kandori, and Tatsuo Ishikawa. "Structure of synthetic calcium hydroxyapatite particles modified with pyrophosphoric acid." Journal of Colloid and Interface Science 283, no. 2 (2005): 609–12. http://dx.doi.org/10.1016/j.jcis.2004.09.013.

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Book chapters on the topic "Pyrophosphoric acid"

1

Malowan, J. E., and R. N. Bell. "Pyrophosphoric Acid (Diphosphoric Acid)." In Inorganic Syntheses. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132340.ch23.

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2

Grover, Liam M., Uwe Gbureck, David Farrar, and J. E. Barralet. "The Mechanical Properties and Microstructures of Cement Formed from Pyrophosphoric and Orthophosphoric Acids." In Bioceramics 17. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-961-x.125.

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Conference papers on the topic "Pyrophosphoric acid"

1

Ziling, C. C., L. Pokrovskii, N. V. Terpugov, Mariana K. Kuneva, Ivanka T. Savatinova, and Mario N. Armenise. "H:LiNbO 3 optical waveguides made from pyrophosphoric acid." In Integrated Optical Circuits, edited by Ka K. Wong. SPIE, 1991. http://dx.doi.org/10.1117/12.50879.

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2

Li, Yu-Shan, Toshiya Yuhara, Kunio Tada, and Yasuyuki Sakaguchi. "Characteristics of low-propagation-loss LiTaO3 optical waveguides proton exchanged in pyrophosphoric acid." In Integrated Photonics Research. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/ipr.1990.we3.

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Proton-exchanged LiTaO3 waveguides1 fabricated by both simple one-step proton exchange2 and similar proton exchange followed by annealing3 in benzoic acid were reported to have a negligible decrease in the r33 electro-optic coefficient. It was also reported that the propagation loss was reduced in pyrophosphoric acid proton-exchanged LiNbO3 waveguides.4

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3

Bettermann, Hans, Martin Labus, Anne Majerus, Carsten Korte, and Werner Lehnert. "On-Line In-Situ Diagnostics of Processes Within HT-PEM Fuel Cells Membrane by Raman Microscopy." In ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 7th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fuelcell2013-18155.

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This contribution describes how Raman spectroscopy can be applied to investigate the distribution of molecular species inside an ABPBI membrane of a running PEM fuel cell. For the in-situ measurements an experimental setup was first developed and then used to identify phosphoric acid species and to record how they change their concentrations when the current consumption of the fuel cell was changed. The observation port to look inside the membrane was placed next to the cathode. At that location among orthophosphoric acid, H3PO4·H2O, a lot of oligophosphoric acid species are present where pyro

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4

Nikolopoulos, John, and Gar Lam Yip. "Characterization Of Proton-Exchanged Optical Waveguides In Z-Cut LiNbO 3 Using Pyrophosphoric Acid." In OE/FIBERS '89, edited by Leon McCaughan, Mark A. Mentzer, Song-Tsuen Peng, Henry J. Wojtunik, and Ka K. Wong. SPIE, 1990. http://dx.doi.org/10.1117/12.963315.

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5

Kan, Dennis, and Gar Lam Yip. "Annealed proton-exchanged planar lithium tantalate waveguides fabricated in concentrated and diluted pyrophosphoric acid." In Gradient-Index Optical Imaging Systems. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/giois.1994.gtuc5.

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Lithium tantalate is a promising substrate for electro-optical integrated-optical devices because of its low sensitivity to optical damage and its high electro-optic coefficient. The annealed proton-exchange technique[1] (APE), which includes an additional annealing step after proton-exchange, is being established as a reliable method for producing stable, low-loss devices with little reduction in the electro-optic constant (from the bulk value). For the optimal design and fabrication of APE waveguide devices, accurate characterization data are necessary.

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