The crystal complex was crystallised the triclinic space
group. The smallest repeating unit of the complex contains an
[Fe(TPT)Ag2(H2O)2](ClO4)3 unit. The Fe atom is coordinated by three nitrogen of
terpyridine moiety from one TPT ligand and by three nitrogen of terpyridine
moiety from another TPT ligand in an octahedral geometry fashion. While one Ag
atom is coordinated by two nitrogen atoms of one pyrazolyl moiety from a TPT
ligand and two nitrogen atoms of adjacent pyrazolyl moiety from another TPT
ligand to generate a linear coordination polymer in a tetragedral geometry. The third
nitrogen atom of the last pyrazolyl part is also coordinated to a silver ion
which was itself coordinated to two water molecules through their oxygen atoms in
a trigonal planar geometry. In vitro study of the complex against some
bacterial pathogens were also investigated.
The
synthesis and crystal structure of a novel polymeric silver(I)-Iron(II) complex
containing bridging ligand
4’-(4-(2,2,2-tris(1H-pyrazol-1-ido)ethoxymethyl)phenyl-2,2’:6’,2”-terpyridine
(TPT) are described. The reaction of TPT with FeCl2.6H2O afforded a complex
[Fe(TPT)2]Cl2 which in turn reacted with a range of silver salts such as AgNO3,
AgClO4 resulted in the formation of heterometal complexes which were
characterised using 1H NMR and ES-MS techniques. The reaction solution of the
[Fe(TPT)2]Cl2 complex with molar eqiuvalnet of AgClO4 resulted in a solution
with gace needdle-like crystals suitable for single X-ray crystallography.
There has
been extensive studies of binding of chiral Ru(II) complexes to DNA backbone
structures. J. K. Barton has studies the cationic coordination of a variety of
chiral poly-pyridine Ru(II) complexes to demonstrate chiral discrimination in
binding to different forms of DNA. Many experimental techniques have been
applied to study the interaction of tris(phenanthroline)ruthenium(II) with DNA,
but despite this, its binding mode and its effect on the DNA structure are
uncertain and have been the subject of much controversy. In this study,
bis[4'-(4-methylphenyl)-2,2':6',2"-terpyridine]Co(III) tris(nitrate) complex
was synthesized and characterized using conventional method such as 1H NMR,
ES-MS, UV-vis spectrophotometry. The Co ion was six coordinated, but the
geometry was significantly distorted from that of an ideal octahedral. In this
study, the terpyridine type ligand fragment appealed because the ligand
structure ensures a meridional arrangement of the donor atoms, which reduces
the number of possible isomers. Co(III) ion was attracted because of its higher
positive charge compared to Ru(II) which will have more affinity towards the
negatively charged DNA structure.
Absorbance
and fluorescence methods, and circular dichroism, were used to study the
interaction of the Co(III) complex solution in water with DNA.
Meet us at “4th International Conference on
Crystallography & Novel Materials” in Bucharest, Romania for more recent
updates on Material Science, Crystallography and Nanotechnology.
For more details, contact:
Jessica Mark
Program Manager | Crystallography Congress
2018
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