Organische und metallorganische molekulare magnetische Materialien: Designer‐Magnete

Abstract

Der Entwurf neuartiger magnetischer Materialien auf molekularer Basis, die für eine Vielzahl von Anwendungen von Interesse sind, ist immer noch eine Kunst. Um ein makroskopisches ferro‐oder ferrimagnetisches Verhalten zu erzielen, ist es erforderlich‐unter Zugrundelegung von Modellen zur Spin‐Spin‐Kopplung‐, Materialien mit ganz bestimmten Primär‐, Sekundär‐und Tertiärstrukturen aufzubauen. Kooperative Phänomene zeigen beispielsweise einige metallorganische Festkörper, die aus linearen Ketten aus Metallocen‐Donoren D und Cyankohlenwasserstoff‐Acceptoren A nach…︁D.+A.+D.+A.+…︁ aufgebaut sind.

Intramolecular Spin Alignment in Photomagnetic Molecular Devices: A Theoretical Study

“…[5][6][7] Indeed, the more than two thousand years old Magnetism [8] has only recently sprouted the branch of molecular magnetism. [9][10][11][12][13] Meanwhile, the last decades have also witnessed tremendous advances in the conceptual rationalization of multifunctional integration at the (intra-)A C H T U N G T R E N N U N G molecular level (including photoactivity) [14][15][16][17] and in performances of spectroscopic methods with respect to both time and space resolution. [18][19][20][21][22][23][24] Concomitantly, theoretical tools have shown major developments allowing to accurately account for behaviors of ever-increasing complexity.…”

A New Basic Motif in Cyanometallate Coordination Polymers: Structure and Magnetic Behavior of M(μ‐OH2)2[Au(CN)2]2(M=Cu, Ni)

“…This type of magnetic behavior is similar to that of a metamagnetic system. [39,56] Such systems are commonly composed of ferro-or ferrimagnetic sheets or chains that interact or order antiferromagnetically at low temperature and field, but undergo a transition to a ferromagnetic state at a critical field. Examples of metamagnetic coordination polymers include monometallic azido-nickel(II), [57] iron(II), [58] malonato-copper(II) [59] systems as well as a range of bimetallic or metal-radical systems.…”

Long‐Range Magnetic Ordering in a TbIII–MoV Cyanido‐Bridged Quasi‐One‐Dimensional Complex

“…% 0. [16][17][18][19][20] The molar specific heat (C m ) data (Figure 4) can be well fitted in the range above T c by the sum of a Debye (T/V D ) 3 term, representing the low-temperature limiting phonon contribution, and the Schottky curve expected for a magnetic Ising S = 1/2 chain, with an intrachain magnetic exchange constant of j J j /k B = 3.6 K and two spins of 1/2 per unit cell. ).…”

“…[1][2][3] In this regard, cyanido-bridged heterobimetallic assemblies derived from [M(CN) 6 ] 3À (M = Cr, Fe, Co) building blocks and various transition metal or rare earth metal ions have been extensively explored. [4][5][6][7][8] More recently, [M(CN) 8 ] 3À/4À (M = Mo, W) anions have become attractive building blocks for the synthesis of new cyanido-bridged networks with remarkable magnetic and photomagnetic properties.…”