Discrete and Polymeric Cobalt Pyrophosphates Derived from Pyrophosphoric Acid Diester Ar2 H2 P2 O7

2020 ◽  
Vol 2020 (24) ◽  
pp. 2352-2361
Author(s):  
Kamna Sharma ◽  
Sandeep K. Gupta ◽  
Ramaswamy Murugavel
Keyword(s):  
Pyrophosphoric Acid

Characteristics of Surface Acoustic Waves on Proton-Exchanged and Annealed Proton-Exchanged Z-Cut $\bf LiNbO_{3}$ Using Pyrophosphoric Acid

1995 ◽  
Vol 34 (Part 1, No. 3) ◽  
pp. 1627-1630 ◽  
Author(s):  
Chien-Chuan Cheng ◽  
Ying-Chung Chen ◽  
Sheng-Tz Wang ◽  
Bo-Wen Tsai
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Pyrophosphoric Acid

Chiral Pyrophosphoric Acid Catalysts for the para-Selective and Enantioselective Aza-Friedel–Crafts Reaction of Phenols

Synthesis ◽  
2018 ◽  
Vol 50 (23) ◽  
pp. 4577-4590 ◽  
Author(s):  
Akira Sakakura ◽  
Manabu Hatano ◽  
Kazuaki Ishihara ◽  
Haruka Okamoto ◽  
Kohei Toh ◽  
...  
Keyword(s):  
Antifungal Agent ◽  
Para Position ◽  
Scale Transformation ◽  
Acid Catalysts ◽  
Pyrophosphoric Acid

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.

System Ammonia-Pyrophosphoric Acid-Water at 0° and 25° C.

1965 ◽  
Vol 10 (1) ◽  
pp. 20-21 ◽  
Author(s):  
T. D. Farr ◽  
J. D. Fleming
Keyword(s):  
Acid Water ◽  
Pyrophosphoric Acid

scholarly journals A Superhydrophilic Aluminum Surface with Fast Water Evaporation Based on Anodic Alumina Bundle Structures via Anodizing in Pyrophosphoric Acid

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3497 ◽  
Author(s):  
Daiki Nakajima ◽  
Tatsuya Kikuchi ◽  
Taiki Yoshioka ◽  
Hisayoshi Matsushima ◽  
Mikito Ueda ◽  
...  
Keyword(s):  
Contact Angle ◽  
Oxide Film ◽  
High Speed ◽  
Porous Alumina ◽  
Aluminum Surface ◽  
Water Evaporation ◽  
Water Contact ◽  
Initial Stage ◽  
Angle Measuring ◽  
Pyrophosphoric Acid

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° was exhibited on the surface covered with the pyramidal bundle structures. As the measurement time of the contact angle decreased to 200–33 ms after the water placement, although the contact angle slightly increased in the initial stage due to the formation of porous alumina, at 33 ms after the water placement, the contact angle was 9.8°, indicating that superhydrophilicity with fast water evaporation was successfully obtained on the surface covered with the pyramidal bundle structures. We found that the shape of the pyramidal bundle structures was maintained in water without separation by in situ high-speed atomic force microscopy measurements.

The Preparation of Long-Chain Monoalkyl Phosphates from Pyrophosphoric Acid and Alcohols

1963 ◽  
Vol 2 (4) ◽  
pp. 775-777 ◽  
Author(s):  
Arthur K. Nelson ◽  
A. D. F. Toy
Keyword(s):  
Pyrophosphoric Acid ◽  
Long Chain
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