2006
DOI: 10.1039/b602595a
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Self-assembled polymetallic square grids ([2 × 2] M4, [3 × 3] M9) and trigonal bipyramidal clusters (M5)—structural and magnetic properties

Abstract: New self-assembled grids and clusters are reported, with square [2 6 2] M 4 (M = Mn(II) 4 , Cu(II) 4 ), trigonal-bipyramidal Mn(II) 5 , and square [3 6 3] M 9 (M = Mn(II), Cu(II)) examples. These are based on a series of ditopic and tritopic hydrazone ligands involving pyridine, pyrimidine and imidazole end groups. In all cases the metal centres are bridged by hydrazone oxygen atoms with large (>125u) bridge angles, leading to antiferromagnetic exchange for all the Mn systems (J = 22 to 25 cm 21 ), which resul… Show more

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Cited by 71 publications
(75 citation statements)
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“…In addition to weakening gels and causing gel-tosol transitions, anions can be used to enhance gelation. 12,90,93,198 salts shows how the anion has an important role in templating the assembly that leads to gelation. [202][203][204] The silver coordinates to the pyridyl functionality in a linear fashion resulting in either a cisoid (meta groups on pyridyl groups are cis to each other in relation to the N Ag N bond) or transoid (meta groups on pyridyl groups are trans to each other in relation to the N Ag N bond) arrangement depending on the identity of the anion present in solution.…”
Section: 35mentioning
confidence: 99%
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“…In addition to weakening gels and causing gel-tosol transitions, anions can be used to enhance gelation. 12,90,93,198 salts shows how the anion has an important role in templating the assembly that leads to gelation. [202][203][204] The silver coordinates to the pyridyl functionality in a linear fashion resulting in either a cisoid (meta groups on pyridyl groups are cis to each other in relation to the N Ag N bond) or transoid (meta groups on pyridyl groups are trans to each other in relation to the N Ag N bond) arrangement depending on the identity of the anion present in solution.…”
Section: 35mentioning
confidence: 99%
“…Vancomycin, an antibiotic, has been used to both strengthen a gel and cause a transformation from gel to sol. 88,93 With compound 1.11, the interaction with vancomycin causes an improvement in the gelation ability. 93 In contrast compound 1.12 breaks down from a gel to a sol upon the addition of vancomycin.…”
Section: 11mentioning
confidence: 99%
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“…Selfassembly of four ligands and four metal ions will afford a [2×2] molecular grid. There are a few ingredients in our molecular design, as follows: (i) A pyrimidine bridging ligand can serve as a ferromagnetic coupler between transition metal spins [1,12,13].…”
Section: Introductionmentioning
confidence: 99%