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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.
Molecular magnetism is a new field of research dealing with the
synthesis and study of the physical properties of molecular
assemblies involving open-shell units. It is essentially
interdisciplinary, joining together organic, organometallic and
inorganic chemists, as well as theoreticians, physicists and
materials scientists.
At the core of research into molecular magnetism lie design and
synthesis of new molecular assemblies exhibiting bulk properties
such as long-range magnetic ordering or bistability with an
hysteresis effect, which confers a memory effect on the system. In
such terms, magnetism may be considered a supramolecular
function.
The first eight contributions to this volume present the state of
the art in organic supramolecular chemistry, emphasising
interlocked systems and molecular trees. The following six articles
are devoted to molecular materials constructed from organic
radicals and transition metal units. Molecular bistability is then
focused on, followed by metal-organic and coordination magnetic
materials. A new approach to nano-sized particles closes the work.
Molecular magnetism is a new field of research dealing with the
synthesis and study of the physical properties of molecular
assemblies involving open-shell units. It is essentially
interdisciplinary, joining together organic, organometallic and
inorganic chemists, as well as theoreticians, physicists and
materials scientists.
At the core of research into molecular magnetism lie design and
synthesis of new molecular assemblies exhibiting bulk properties
such as long-range magnetic ordering or bistability with an
hysteresis effect, which confers a memory effect on the system. In
such terms, magnetism may be considered a supramolecular
function.
The first eight contributions to this volume present the state of
the art in organic supramolecular chemistry, emphasising
interlocked systems and molecular trees. The following six articles
are devoted to molecular materials constructed from organic
radicals and transition metal units. Molecular bistability is then
focused on, followed by metal-organic and coordination magnetic
materials. A new approach to nano-sized particles closes the work.
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.
Dies Buch ist fur die Praxis geschrieben. Ein Bedurfnis liegt ohne
Zweifel vor. Doch bleibt eine praktische Anleitung und Einleitung
in das Gebiet der Logopadie problematisch. Spre- chen ist in jedem
Falle ein Vorgang. eine Handlung. Das be- ginnt mit der Anbahnung
der Sprache und zieht sich bis zum Lebensende durch die Biographie
jedes Sprechers und Hoe- rers. Sprache kennt keinen Stillstand.
nicht beim Individuum. nicht in der Sprachgemeinschaft. Sprache ist
ein Augenblicks- phanomen, sofern sie nicht schriftlich fixiert
wird. Weil Spra- che Handlung ist und Handlung Bewegung und
Bewegung sich in der Zeit vollzieht. lassen sich korrigierende
Anregun- gen und UEbungen meist vergeblich schwarz auf weiss fest-
schreiben. Wir haben versucht, von der systematischen Einteilung
fort- zudenken und uns auf typische Stoerungsbilder. die im Rah-
men von Fallbeschreibungen vorgestellt werden. zu konzen- trieren.
Wir hoffen. mit diesem verkurzten Ansatz einen Teil der
Lebendigkeit. die der aktuellen Sprache und dem tatigen Sprecher
anhaftet. fur unser Konzept bewahren zu koennen. Fur diejenigen.
die daruberhinaus wissen und erkennen wol- len. sind die
einschlagigen Kompendien zustandig und in er- ster Annaherung die
von uns beigefugten allgemeinen, ergan- zenden und erlauternden
Beitrage, Bilder. Tabellen und stati- stischen Aufrisse.
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