Logo

RNfinity

Login Register
  • News/Blog
  • View
  • Info
  • Submit
  • Contact Us
  • Home

Chemistry

Register to submit your paper, and Start Earning from your Research Articles

Biomedical

Diazenium Betaines Derived from the Stable Free Radical DPPH with Diradicaloid Behavior

Adela F. Dobre,

Adela F. Dobre

Department of Inorganic, Organic, Bioorganic and Catalysis, Faculty of Chemistry, University of Bucharest, Panduri 90, 050663 Bucharest, Romania

Augustin M. Mădălan,

Augustin M. Mădălan

Department of Inorganic, Organic, Bioorganic and Catalysis, Faculty of Chemistry, University of Bucharest, Panduri 90, 050663 Bucharest, Romania

Anamaria Hanganu,

Anamaria Hanganu

Department of Inorganic, Organic, Bioorganic and Catalysis, Faculty of Chemistry, University of Bucharest, Panduri 90, 050663 Bucharest, Romania

Petre Ionita

Petre Ionita

Department of Inorganic, Organic, Bioorganic and Catalysis, Faculty of Chemistry, University of Bucharest, Panduri 90, 050663 Bucharest, Romania


Starting from the well known stable free radical DPPH (or its reduced counterpart, 2,2-diphenyl-1-picryl-hydrazine) and several amino derivatives, novel zwitterionic compounds (diazenium betaines) were obtained and characterized by different means, like NMR, IR, MS, and UV–Vis. These betaines are highly intense blue-colored compounds that can be easily reduced by ascorbic acid (vitamin C) or sod...
10 months ago

Physics Maths Engineering

The Hydrophobic Effects: Our Current Understanding

Qiang Sun

Qiang Sun

Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, The School of Earth and Space Sciences, Peking University, Beijing 100871, China


Hydrophobic interactions are involved in and believed to be the fundamental driving force of many chemical and biological phenomena in aqueous environments. This review focuses on our current understanding on hydrophobic effects. As a solute is embedded into water, the interface appears between solute and water, which mainly affects the structure of interfacial water (the topmost water layer at th...
10 months ago

Physics Maths Engineering

Michaelis–Menten kinetics during dry etching processes

Rimantas Knizikevičius

Rimantas Knizikevičius


The chemical etching of germanium in Br2 environment at elevated temperatures is described by the Michaelis–Menten equation. The validity limit of Michaelis–Menten kinetics is subjected to the detailed analysis. The steady-state etching rate requires synergy of two different process parameters. High purity gas should be directed to the substrate on which intermediate reaction product does not ...
10 months ago

Physics Maths Engineering

Hydroxyl-stretching region in the Raman broad scans on minerals of the vivianite group

Amelia Carolina Sparavigna

Amelia Carolina Sparavigna

Polytechnic University of Turin


Vivianite is a hydrated iron phosphate mineral (Fe3(PO4)2·8H2O), crystallized in a monoclinic system. It is the endmember of a mineral series known as the vivianite group, where minerals have the general formula A3(XO4)2·8H2O, A is a divalent metal cation and X is phosphorus P or arsenic As. Today, vivianite is attracting interest as a promising material for recovering phosphorous from wastewate...
10 months ago

Physics Maths Engineering

Synthesis and Characterization of Zincoxide Nanoparticles of Average Diameter 10nm in Aqueous Medium

Arpita Biswas

Arpita Biswas

Department of Chemistry, Shibpur Dinobundhoo Institution (College),

abiswas83@gmail.com


Synthesis of Zincoxide nanoparticles (ZnO NPs) with definite size and shape and their morphological characterization rationally is really a challenging aspect at present due to the ongoing demand of these nanosize particles for their divergent use in different field of science and technology. Reduction of Zinc acetate dihydrate by sodium hydroxide was performed to produce ZnO NPs by follow...
3 years ago

Physics Maths Engineering

The Microscopic Mechanisms Involved in Superexchange

Jacques Curely

Jacques Curely

Laboratoire Ondes et Matière d’Aquitaine, UMR 5798, University of Bordeaux,

Jacques.curely@u-bordeaux.fr


:In earlier work, we previously established a formalism that allows to express the exchange energy J vs. fundamental molecular integrals without crystal field, for a fragment A–X–B, where A and B are 3d 1 ions and X is a closed-shell diamagnetic ligand. In this article, we recall this formalism and give a physical interpretation: we may rigorously predict the ferromagnetic (J < 0) or antif...
3 years ago

Related Subjects

Physics Math Computer science Engineering Earth science Biology

Showing Page 2 to 2

  • ‹
  • 1
  • 2
  • ›

Follow Us

  • Xicon
  • Contact Us
  • Privacy Policy
  • Terms and Conditions

5 Braemore Court, London EN4 0AE | Telephone +442082758777 | info@rnfinity.com |


© Copyright 2025 All Rights Reserved.