Cobalt Antiferromagnetic Ring and Grid Single-Molecule Magnet
作者:Takuya Shiga、Takuto Matsumoto、Mao Noguchi、Tatsuya Onuki、Norihisa Hoshino、Graham N. Newton、Motohiro Nakano、Hiroki Oshio
DOI:10.1002/asia.200900216
日期:2009.11.2
Gridmagnet: A Co8 ring and a Co9 grid complex are synthesized using a multidentate polypyridine‐type ligand and are shown to exhibit all antiferromagnetic interactions between metal centers, with the grid complex displaying SMM properties as a result of alternating high spin/low spin metal centers in the outer 8‐membered ring.
作者:Hiroki Sato、Momoyo Yamaguchi、Tatsuya Onuki、Mao Noguchi、Graham N. Newton、Takuya Shiga、Hiroki Oshio
DOI:10.1002/ejic.201500096
日期:2015.5
and single‐crystal X‐ray structural analyses. The pentanuclear complex 1 is composed of three ligands and five manganese ions with μ3‐oxido bridges, whereas the octanuclear complex 2 is constructed from six ligands and eight manganese ions with two μ3‐chlorido bridges. Both compounds have helix‐type structures. The manganese ions in 1 are present in a mixture of +2 and +3 valence states, whereas 2 is
Mapping the Sequential Self-Assembly of Heterometallic Clusters: From a Helix to a Grid
作者:Graham N. Newton、Tatsuya Onuki、Takuya Shiga、Mao Noguchi、Takuto Matsumoto、Jennifer S. Mathieson、Masayuki Nihei、Motohiro Nakano、Leroy Cronin、Hiroki Oshio
DOI:10.1002/anie.201007388
日期:2011.5.16
Two iron/cobalt mixed‐valence clusters were synthesized using multidentate polypyridyl ligands (see picture: FeII orange, FeIII yellow, CoII blue, O red). A heptanuclear helix and a [3×3] grid complex form depending on the metal ion stoichiometry. ESI‐MS measurements suggest that the helical cluster is an intermediate to the grid complex.
使用多齿聚吡啶基配体合成了两个铁/钴混合价簇(见图:Fe II 橙色,Fe III 黄色,Co II 蓝色,O红色)。取决于金属离子的化学计量,一个七核螺旋和一个[3×3]网格络合物的形式。ESI-MS测量表明,螺旋簇是网格复合体的中间产物。
Four Redox Isomers of a [3 × 3] Copper–Iron Heterometal Grid
作者:Hiroki Sato、Tatsuya Onuki、Graham N. Newton、Takuya Shiga、Hiroki Oshio
DOI:10.1021/acs.inorgchem.3c02498
日期:2023.11.6
grid complex, [CuI2CuII6FeIII(L)6](BF4)5·MeOH·9H2O (1; MeOH = methanol), was synthesized by a one-pot reaction of copper and iron ions with multidentate ligand 2,6-bis[5-(2-pyridinyl)-1H-pyrazol-3-yl]pyridine (H2L). 1 showed five quasi-reversible one-electron redox processes centered at +0.74, +0.60, +0.39, +0.27, and −0.13 V versus SCE, assignable to four CuI/CuII processes and one FeII/FeIII couple
混合价异金属非核[3 × 3]网格配合物[Cu I 2 Cu II 6 Fe III (L) 6 ](BF 4 ) 5 ·MeOH·9H 2 O ( 1 ; MeOH = 甲醇),铜离子和铁离子与多齿配体 2,6-双[5-(2-吡啶基)-1 H-吡唑-3-基]吡啶 (H 2 L)的一锅反应。图1显示了五个准可逆单电子氧化还原过程,相对于SCE,集中在+0.74、+0.60、+0.39、+0.27和-0.13 V,可分配给四个Cu I / Cu II过程和一个Fe II / Fe III对,分别。双电子氧化物质 [Cu II 8 Fe III (L) 6 ](PF 6 ) 7 ·4MeOH·7H 2 O ( 1 2eOx )、双电子还原物质 [Cu I 4 Cu II 4 Fe III (L) 6 ](PF 6 ) 3 ·2H 2 O ( 1 2eRed ) 和三电子还原物质 [Cu I 4
Multiredox Active [3 × 3] Copper Grids
作者:Hiroki Sato、Lisa Miya、Kiyotaka Mitsumoto、Takuto Matsumoto、Takuya Shiga、Graham N. Newton、Hiroki Oshio
DOI:10.1021/ic401445u
日期:2013.9.3
A nonanuclear copper grid complex, [Cu-9(II)(L)(6)](BF4)(6)I-PrOH center dot 5H(2)(1 center dot 1-PrOH center dot 5H(2)O; L = 2,6-bis[5-(2-pyridinyl)-1H-pyrazol-3-yl]pyridine), was syn. thesized With a [3 X 3] grid structure consisting of nine " Cu-II ions and Six deprotonated.ligands and displayed four, Steii 'quasi-reversible redox behavior from [Cu-9(II)] to [(Cu4Cu5II)-Cu-I]. The corresponding, heterovalent complex [(Cu2Cu7II)-Cu-I(L)(6)](PF6)(4)center dot 3H(2)O (2 center dot 3H(2)O) was successfully isolated and, had a distorted core structure that radically changed the intramolecular magnetic coupling pathways.