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One of the major challenges of science in the last few years of the
second millennium is learning how to design materials which can
fulfill specific tasks. Ambitious as it may be, the possibilities
of success are not ne li ble provided that all the different
expertises merge to overcome the limits of eXIsting disciplines and
forming new paradigms science. The NATO Advanced Research Workshop
on "Magnetic Molecular Materials" was organized with the above
considerations in mind in order to determine which are the most
appropriate synthetic strategies, experimental techniques of
investigation, and theoretical models which are needed in order to
develop new classes of magnetic materials which are based on
molecules rather than on metallic or ionic lattices. Why molecules?
The answer may be obvious: molecular chemistry in principle fine
can tune the structures and the properties of complex aggregates,
and nature already provides a large number of molecular aggregates
which can perform the most disparate functions. The contributions
collected in this book provide a rather complete view of the
current research accomplishments of magnetic molecular materials.
There are several different synthetic approaches which are followed
ranging from purely organic to inorganic materials. Some
encouraging successes have already been achieved, even if the
critical temperatures below which magnetic order is observed still
are in the range requiring liquid helium.
Linear chain substances span a large cross section of contemporary
chemis try ranging from covalent polymers, organic charge transfer
complexes to nonstoichiometric transition metal coordination
complexes. Their common ality, which coalesced intense interest in
the theoretical and experimental solid-state-physics/chemistry
communities, was based on the observation that these inorganic and
organic polymeric substrates exhibit striking metal-like electrical
and optical properties. Exploitation and extension of these systems
has led to the systematic study of both the chemistry and physics
of highly and poorly conducting linear chain substances. To gain a
salient understanding of these complex materials rich in anomalous
anisotropic electrical, optical, magnetic, and mechanical
properties, the convergence of diverse skills and talents was
required. The constructive blending of traditionally segregated
disciplines such as synthetic and physical organic, inorganic, and
polymer chemistry, crystallography, and theoretical and
experimental solid state physics has led to the timely devel opment
of a truly interdisciplinary science. This is evidenced in the
contri butions of this monograph series. Within the theme of
Extended Linear Chain Compounds, experts in important, but varied,
facets of the discipline have reflected upon the progress that has
been made and have cogently summarized their field of specialty.
Consequently, up-to-date reviews of numerous and varied aspects of
"extended linear chain compounds" has developed. Within these
volumes, numerous incisive contributions covering all aspects of
the diverse linear chain substances have been summarized. I am
confident that assimilation of the state-of-the-art and clairvoy
ance will be rewarded with extraordinary developments in the near
future.
Linear chain substances span a large cross section of contemporary
chemistry ranging from covalent polymers, to organic charge
transfer com plexes to nonstoichiometric transition metal
coordination complexes. Their commonality, which coalesced intense
interest in the theoretical and exper imental solid state
physics/chemistry communities, was based on the obser vation that
these inorganic and organic polymeric substrates exhibit striking
metal-like elec,trical and optical properties. Exploitation and
extension of these systems has led to the systematic study of both
the chemistry and physics of highly and poorly conducting linear
chain substances. To gain a salient understanding of these complex
materials rich in anomalous aniso tropic electrical, optical,
magnetic, and mechanical properties, the conver gence of diverse
skills and talents was required. The constructive blending of
traditionally segregated disciplines such as synthetic and physical
organic, inorganic, and polymer chemistry, crystallography, and
theoretical and ex perimental solid state physics has led to the
timely development of a truly interdisciplinary science. This is
evidenced in the contributions of this monograph series. Within the
theme of Extended Linear Chain Compounds, experts in important, but
varied, facets of the discipline have reflected upon the progress
that has been made and have cogently summarized their field of
speciality. Consequently, up-to-date reviews of numerous and varied
aspects of "extended linear chain compounds" have developed. Within
these vol umes, numerous incisive contributions covering all
aspects of the diverse linear chain substances have been
summarized.
Linear chain substances span a large cross section of contemporary
chemistry ranging from covalent polymers, to organic charge
transfer com plexes to nonstoichiometric transition metal
coordination complexes. Their commonality, which coalesced intense
interest in the theoretical and exper imental solid state
physics/chemistry communities, was based on the obser vation that
these inorganic and organic polymeric substrates exhibit striking
metal-like electrical and optical properties. Exploitation and
extension of these systems has led to the systematic study of both
the chemistry and physics of highly and poorly conducting linear
chain substances. To gain a salient understanding of these complex
materials rich in anomalous aniso tropic electrical, optical,
magnetic, and mechanical properties, the conver gence of diverse
skills and talents was required. The constructive blending of
traditionally segregated disciplines such as synthetic and physical
organic, inorganic, and polymer chemistry, crystallography, and
theoretical and ex perimental solid state physics has led to the
timely development of a truly interdisciplinary science. This is
evidenced in the contributions of this monograph series. Within the
theme of Extended Linear Chain Compounds, experts in important, but
varied, facets of the discipline have reflected upon the progress
that has been made and have cogently summarized their field of
specialty. Consequently, up-to-date reviews of numerous and varied
aspects of "extended linear chain compounds" have developed. Within
these vol umes, numerous incisive contributions covering all
aspects of the diverse linear chain substances have been
summarized."
Molecular Magnetism: From Molecular Assemblies to the Devices
reviews the state of the art in the area. It is organized in two
parts, the first of which introduces the basic concepts, theories
and physical techniques required for the investigation of the
magnetic molecular materials, comparing them with those used in the
study of classical magnetic materials. Here the reader will find:
(i) a detailed discussion of the electronic processes involved in
the magnetic interaction mechanisms of molecular systems, including
electron delocalization and spin polarization effects; (ii) a
presentation of the available theoretical models based on spin and
Hubbard Hamiltonians; and (iii) a description of the specific
physical investigative techniques used to characterize the
materials. The second part presents the different classes of
existing magnetic molecular materials, focusing on the possible
synthetic strategies developed to date to assemble the molecular
building blocks ranging from purely organic to inorganic materials,
as well as on their physical properties and potential applications.
These materials comprise inorganic and organic ferro- and
ferrimagnets, high nuclearity organic molecules and magnetic and
metallic clusters, spin crossover systems, charge transfer salts
(including fulleride salts and organic conductors and
superconductors), and organized soft media (magnetic liquid
crystals and Langmuir-Blodgett films).
Molecular Magnetism: From Molecular Assemblies to the Devices
reviews the state of the art in the area. It is organized in two
parts, the first of which introduces the basic concepts, theories
and physical techniques required for the investigation of the
magnetic molecular materials, comparing them with those used in the
study of classical magnetic materials. Here the reader will find:
(i) a detailed discussion of the electronic processes involved in
the magnetic interaction mechanisms of molecular systems, including
electron delocalization and spin polarization effects; (ii) a
presentation of the available theoretical models based on spin and
Hubbard Hamiltonians; and (iii) a description of the specific
physical investigative techniques used to characterize the
materials. The second part presents the different classes of
existing magnetic molecular materials, focusing on the possible
synthetic strategies developed to date to assemble the molecular
building blocks ranging from purely organic to inorganic materials,
as well as on their physical properties and potential applications.
These materials comprise inorganic and organic ferro- and
ferrimagnets, high nuclearity organic molecules and magnetic and
metallic clusters, spin crossover systems, charge transfer salts
(including fulleride salts and organic conductors and
superconductors), and organized soft media (magnetic liquid
crystals and Langmuir-Blodgett films).
One of the major challenges of science in the last few years of the
second millennium is learning how to design materials which can
fulfill specific tasks. Ambitious as it may be, the possibilities
of success are not ne li ble provided that all the different
expertises merge to overcome the limits of eXIsting disciplines and
forming new paradigms science. The NATO Advanced Research Workshop
on "Magnetic Molecular Materials" was organized with the above
considerations in mind in order to determine which are the most
appropriate synthetic strategies, experimental techniques of
investigation, and theoretical models which are needed in order to
develop new classes of magnetic materials which are based on
molecules rather than on metallic or ionic lattices. Why molecules?
The answer may be obvious: molecular chemistry in principle fine
can tune the structures and the properties of complex aggregates,
and nature already provides a large number of molecular aggregates
which can perform the most disparate functions. The contributions
collected in this book provide a rather complete view of the
current research accomplishments of magnetic molecular materials.
There are several different synthetic approaches which are followed
ranging from purely organic to inorganic materials. Some
encouraging successes have already been achieved, even if the
critical temperatures below which magnetic order is observed still
are in the range requiring liquid helium.
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