Exploring the catalytic activity of new water soluble dinuclear copper(<scp>ii</scp>) complexes towards the glycoside hydrolysis
作者:Shobhraj Haldar、Ayan Patra、Manindranath Bera
DOI:10.1039/c4ra09800e
日期:——
calculation. The DFT optimized structure of complex 1 shows that two copper(II) centers are in a distorted square pyramidal geometry with Cu⋯Cu separation of 3.677 Å. On the other hand, the DFT optimized structure of complex 2 reveals that one copper(II) center adopts a five-coordinate distorted square pyramidal geometry and the other copper(II) center is in a distorted square planar geometry with Cu⋯Cu separation
The present invention relates to a polishing composition for silicon wafer comprising silica; a basic compound; at least one compound selected from the group consisting of amino acid derivatives represented by formula (1)
wherein R
1
, R
2
and R
3
are identical or different one another, C
1-12
alkylene group that may be substituted by hydroxyl group, carboxyl group, phenyl group or amino group, and formula (2)
wherein R
4
and R
5
are identical or different each other, hydrogen atom, or C
1-12
alkyl group that may be substituted by hydroxyl group, carboxyl group, phenyl group or amino group, with a proviso that both R
4
and R
5
are not hydrogen at the same time, and R
6
is C
1-12
alkylene group that may be substituted by hydroxyl group, carboxyl group, phenyl group or amino group, and the salts of the amino acid derivatives; and water. The polishing composition can prevent metal contamination, particularly copper contamination in polishing of silicon wafer.
Exceptionally water-soluble [CuII2] complexes for investigating monosaccharide-metal ion interactions
作者:Sujan Sk、Tapan Sarkar、Avishek Majumder、Chandan Sarkar、Manindranath Bera
DOI:10.1016/j.molstruc.2023.136343
日期:2023.12
The design, synthesis and characterization of two new dinuclearcopper(II) complexes [Cu2(phpda)(µ-Cl)]·2H2O (1) and [Cu2(phpda)(µ-NO3)]·2H2O (2) (H3phpda = N,N′ -bis[2-pyridylmethyl]-2‑hydroxy-1,3-propanediamine-N,N′-dipropionic acid) as carbohydrate binding models have been reported. The FTIR, UV–Vis, ESI-MS, microanalysis and molar conductance data have been utilized to characterize the synthesized