Metal-directed synthesis of a pendent-arm N2S2-macrocycle incorporating an ortho-xylene unit

Elliott, Anthony J.; Lawrance, Geoffrey A.; Wei, Gang

doi:10.1016/s0277-5387(00)81768-4

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…The precursor trans -[CoL 15SPh Cl](ClO 4 ) 2 was obtained from a complexation reaction of the known ligand L 15SPh with Co II , following the same standard preparative procedure described for this family of complexes. − A 20% excess of CoCl 2 ·6H 2 O (0.49 g) was added with stirring to an aqueous solution of the hydrochloride (L 15SPh ·3HCl) of 8-methyl-6,10-diaza-3,13-dithia-1,15,16,17,18,19-dehydrobicyclo[13.4.0]nonadecan-8-amine (0.75 g) in water (150 cm 3 ), and the pH was adjusted to ca. 7.…”

Section: Methodsmentioning

confidence: 99%

Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

et al. 2005

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The preparation and characterization of a series of trinuclear mixed-valence cyano-bridged Co(III)-Fe(II)-Co(III) compounds derived from known dinuclear [[L(n)Co(III)(mu-NC)]Fe(II)(CN)(5)](-) complexes (L(n)() = N(5) or N(3)S(2) n-membered pendant amine macrocycle) are presented. All of the new trinuclear complexes were fully characterized spectroscopically (UV-vis, IR, and (13)C NMR). Complexes exhibiting a trans and cis arrangement of the Co-Fe-Co units around the [Fe(CN)(6)](4-) center are described (i.e., cis/trans-[{L(n)Co(III)(mu-NC)](2)Fe(II)(CN)(4)](2+)), and some of their structures are determined by X-ray crystallography. Electrochemical experiments revealed an expected anodic shift of the Fe(III/II) redox potential upon addition of a tripositively charged [Co(III)L(n)] moiety. The Co(III/II) redox potentials do not change greatly from the di- to the trinuclear complex, but rather behave in a fully independent and noncooperative way. In this respect, the energies and extinction coefficients of the MMCT bands agree with the formal existence of two mixed-valence Fe(II)-CN-Co(III) units per molecule. Solvatochromic experiments also indicated that the MMCT band of these compounds behaves as expected for a class II mixed-valence complex. Nevertheless, its extinction coefficient is dramatically increased upon increasing the solvent donor number.

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Section: Methodsmentioning

confidence: 99%

Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

et al. 2005

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“…Synthesis trans-[CoClL 14COO ](ClO 4 ). The precursor mononuclear cobalt complex for the preparation of Na 2 [{trans-L 14COO Co III -(m-NC)}Fe II (CN) 5 ] was obtained from the reaction of the new ligand L 14COO 18 with Co II , following the same standard preparative procedure described for this family of com-plexes. 9,[19][20][21][22] Ligand L 14COO was obtained as described for the analogous L 15COO but using the 2,3,2-tet linear amine instead of 3,2,3-tet used in the literature.…”

Section: Methodsmentioning

confidence: 99%

Tailoring mixed-valence CoIII/FeII complexes for their potential use as sensitizers in dye sensitized solar cells

et al. 2008

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“…No hydrogen atoms were attached to the solvate molecules, and the partially occupied non-hydrogen sites were refined isotropically. prepared as previously described, 34 . To a solution of compound L 1 (2.03 g, 7.9 mmol) in absolute ethanol (100 cm 3 ) was added acetonitrile (200 cm 3 ).…”

Section: Crystallographymentioning

confidence: 99%

Copper(I) complexes of dinucleating macrocyclic bis(dithiadiimine) ligands

Wei¹,

Lawrance²,

Richens³

et al. 1998

J. Chem. Soc., Dalton Trans.

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hexadecaene (L 2 ) have been synthesized in high yield by a 2 ϩ 2 condensation of isophthalaldehyde and terephthalaldehyde with 2,2Ј-o-phenylenebis(methylenethio)bis(ethanamine) (L 1 ) in acetonitrile. Air-stable dicopper() complexes of L 2 and L 3 were obtained from complexation reactions withconfirmed by a crystal structure analysis. The complex consists of two N 2 S 2 donor sets each tetrahedrally co-ordinated to the copper() ions with two para-substituted phenyl rings bridging the two N 2 S 2 'compartments' π-stacked parallel (separation 3.5 Å), and a double helical arrangement of the ligand backbone clearly evident. Electrochemical studies of the dinuclear complexes revealed quasi-reversible Cu I ᎐Cu II couples above ϩ1 V (versus NHE), with reversibility influenced by the presence of ferrocene, which acts as a surface modifier for electron transfer.

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Metal-directed synthesis of a pendent-arm N2S2-macrocycle incorporating an ortho-xylene unit

Cited by 13 publications

References 11 publications

Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

Tailoring mixed-valence CoIII/FeII complexes for their potential use as sensitizers in dye sensitized solar cells

Copper(I) complexes of dinucleating macrocyclic bis(dithiadiimine) ligands

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Metal-directed synthesis of a pendent-arm N2S2-macrocycle incorporating an ortho-xylene unit

Cited by 13 publications

References 11 publications

Dinuclear Cyano-Bridged CoIII−FeII Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

Dinuclear Cyano-Bridged CoIII−FeII Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

Tailoring mixed-valence CoIII/FeII complexes for their potential use as sensitizers in dye sensitized solar cells

Copper(I) complexes of dinucleating macrocyclic bis(dithiadiimine) ligands

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Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity

Dinuclear Cyano-Bridged Co^III−Fe^II Complexes as Precursors for Molecular Mixed-Valence Complexes of Higher Nuclearity