Understanding the Role of Hyponitrite in Nitric Oxide Reduction

Herein, we review the preparation and coordination chemistry of cis and trans isomers of hyponitrite, [N2O2](2-). Hyponitrite is known to bind to metals via a variety of bonding modes. In fact, at least eight different bonding modes have been observed, which is remarkable for such a simple ligand. More importantly, it is apparent that the cis isomer of hyponitrite is more reactive than the trans isomer because the barrier of N2O elimination from cis-hyponitrite is lower than that of trans-hyponitrite. This observation may have important mechanistic implications for both heterogeneous NOx reduction catalysts and NO reductase. However, our understanding of the hyponitrite ligand has been limited by the lack of a general route to this fragment, and most instances of its formation have been serendipitous

Synthesis of N₈-macrocyclic ligands by polyphosphoric acid-catalysed condensation <span style="font-size:12.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-IN;mso-fareast-language: EN-IN;mso-bidi-language:AR-SA" lang="EN-IN">of trimethoprim with amino acids</span>

1282-1284<span style="font-size:12.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-in;mso-fareast-language:en-in;mso-bidi-language:ar-sa"="" lang="EN-IN">Trimethoprim [2,4-diamino-5-(3', 4',5'-trimethoxybenzyl) pyrimidine] reacts with amino acids to give colourless N8-macrocyclic compounds by the polyphosphoric acid-catalysed condensation. The products contain a cross conjugated macrocyclic system of a novel type, related to some extent to azoporphins. The condensation proceeds to give products which, in certain instances, are not readily attainable by conventional condensation techniques.</span

Complexes of Pyrrole-1,2-dithiodicarboximide with Fe(II), Co(I), Ni(0), Cu(I), Ag(I), Ru(II), Rh(I), Pd(0) & Pt(0)

122-12

Complexing Behaviour of N-Sulphinylaniline: Complexes of Mn(II), Fe(II), Ru(II), Co(I), Rh(I), Ni(0), Pd(0), Pt(0), Cu(I) & Ag(I)

21-2

Complexing Behaviour of Ethyl N-Phenyldithiocarbamate: Structural Studies of Complexes of Fe(II), Ru(II) , Co(II), Rh(III), Rh(I), Ni(II), Pd(0), Pt(0), Pt(II), Ag(I), Zn(II), Cd(II) & Hg(II)

127-13

Effect of elemental composition and size on electron confinement in self-assembled SiC quantum dots : a combinatorial approach

A high level of control over quantum dot (QD) properties such as size and composition during fabrication is required to precisely tune the eventual electronic properties of the QD. Nanoscale synthesis efforts and theoretical studies of electronic properties are traditionally treated quite separately. In this paper, a combinatorial approach has been taken to relate the process synthesis parameters and the electron confinement properties of the QDs. First, hybrid numerical calculations with different influx parameters for Si1-x Cx QDs were carried out to simulate the changes in carbon content x and size. Second, the ionization energy theory was applied to understand the electronic properties of Si1-x Cx QDs. Third, stoichiometric (x=0.5) silicon carbide QDs were grown by means of inductively coupled plasma-assisted rf magnetron sputtering. Finally, the effect of QD size and elemental composition were then incorporated in the ionization energy theory to explain the evolution of the Si1-x Cx photoluminescence spectra. These results are important for the development of deterministic synthesis approaches of self-assembled nanoscale quantum confinement structures