Self-assembled Transition Metal Coordination Frameworks of ...

PREFACE
In its method, chemistry is a science of interactions, of transformations
and of models. In its object, the molecule and the material, chemistry expresses its
creativity. Chemical synthesis has the power to produce new molecules and new
materials, with new properties. The appearance of supramolecular chemistry in the
late 20"‘ century stimulated new thinking about the relationship of chemistry with
biology, that biology and other higher sciences may be considered as emerging out
of this new chemistry. The roots of supramolecular chemistry extend into organic
chemistry, coordination chemistry and metal ion ligand complexes, physical
chemistry, material science and biology. These wide horizons of supramolecular
science are a challenge and a stimulus to the creative imagination of the chemist.
However, chemistry is not limited to systems similar to those found in biology,
but is free to create novel species and to invent processes.
This Ph. D. thesis is mainly concemed with the coordination chemistry of
some novel selected transition metal complexes of suitably substituted
carbohydrazones and thiocarbohydrazones, with a view to self-assembled
molecular square grid architectures, carried out during the period of my research
from January 2004 to October 2007. The work presentation comprises reports of
relevant related results published so far into a consistent and useful structure as far
as that are possible. I hope the work comes up to its premises and proves useful
though there remains, however, a lot to be done. Interesting anticipation are due to
ideal opportunities that it can provide some steps into the fascinating world of
supramolecular chemistry through symmetrical metallosupramolecular square grid
complexes and related studies.
Symmetry is everywhere we look in nature. Nature like symmetry as there
seems to be a lot of symmetrical objects. In lines to those beautiful symmetrical
structures of macro world, building beautiful framework molecules is a subject of
keen interest in all branches of synthetic chemistry especially because of their
potential applications. The current work focuses on building beautifiil molecular