Synthesis and characterization of a family of molecule-based magnets containing methyl-substituted phenyltricyanoethylene acceptors

A New Family of High Tc Molecule-Based Magnetic Networks: V[x-ClnPTCE]2·yCH2Cl2 (PTCE = Phenyltricyanoethylene)

“…Several authors have shown that low valent metals can react with aryl-halogen bonds in the presence of electron withdrawing groups, and it has been shown that halogen substituents that are para to an electron withdrawing group are particularly vulnerable [32][33][34][35][36]. It is also worth noting that the strongly electron donating 4-MePTCE has a T c well above that of either 4-ClPTCE or 4-FPTCE, which lends support to the proposal that NAS may play a role in the 4-X halogen substituted magnets [37].…”

Synthesis and Characterization of a Family of Molecule-Based Ferrimagnetic Network Solids Containing Fluoro-Substituted Dicyanostilbene Acceptors

“…We believe that this can be explained by noting that the fluorine atom in the position para to the tricyanovinyl group (a potent electron-withdrawing group) is susceptible to nucleophilic aromatic substitution/oxidative addition . This belief is supported by the result that, if there is no good leaving group in the 4-position (such as a methyl group), T c is not depressed …”

“…11 This belief is supported by the result that, if there is no good leaving group in the 4-position (such as a methyl group), T c is not depressed. 12 Given this result, we have now returned to the dicyanostilbene scaffold to answer the question "What will happen to the ordering temperature of the magnet using building block DCPFS (1a) compared to that of the magnet built from 3h (Figure 3), that lacks the analogous two fluorine atoms para to the olefin (that were found to be depress T c in the PTCE family of compounds)? Will T c go up or down?…”

Slow magnetic relaxation and spin crossover behavior in two mixed-valence Co(ii)/Co(iii) complexes

“…[6][7][8] Single-molecule magnets (SMMs) and spincrossover (SCO) are two important classifications in the field of bistable magnetic materials, which have potential applications in data storage and molecular switches. [9][10][11][12][13][14][15] Single-molecule magnets (SMMs) that display magnetic bistability and slow relaxation processes have attracted extensive interest to design and synthesize paramagnetic metal-containing complexes for their potential applications in the fields of highdensity information storage, quantum computing and molecule spintronics. [16][17][18][19][20][21][22] For further development in this field, it is important to obtain large energy barriers that help to retain either one of the two magnetic states for extending the relaxation time.…”

“…6–8 Single-molecule magnets (SMMs) and spin-crossover (SCO) are two important classifications in the field of bistable magnetic materials, which have potential applications in data storage and molecular switches. 9–15…”