Progressive decoration of pentanuclear cu(ii) 12-metallacrown-4 nodes towards targeted 1- and 2d extended networks
McDonald, Cecelia Whyte, Teresa Taylor, Stephanie M. Sanz, Sergio Brechin, Euan K. Gaynor, Declan Jones, Leigh F.
McDonald, Cecelia
Whyte, Teresa
Taylor, Stephanie M.
Sanz, Sergio
Brechin, Euan K.
Gaynor, Declan
Jones, Leigh F.
Publication Date
2013-01-01
Type
Article
Downloads
Citation
McDonald, Cecelia; Whyte, Teresa; Taylor, Stephanie M. Sanz, Sergio; Brechin, Euan K.; Gaynor, Declan; Jones, Leigh F. (2013). Progressive decoration of pentanuclear cu(ii) 12-metallacrown-4 nodes towards targeted 1- and 2d extended networks. CrystEngComm 15 (34), 6672-6681
Abstract
The synthesis, structures and magnetic characterisation of a family of discrete planar pentanuclear Cu(II) 12-MC-4 metallacrowns of formulae [Cu-5(L-1)(4)(MeOH)(4)](ClO4)(2) (1), [Cu-5(L-1)(4)(py)(2)](ClO4)(2)center dot py (2), [Cu-5(L-1)(4)(py)(6)](ClO4)(2) (3) and [Cu-5(L-2)(4)(MeOH)(4)](ClO4)(2)center dot H2O (7) (where L1H2 = 2-(dimethylamino)phenylhydroxamic acid and L2H2 = 2-(amino)phenylhydroxamic acid) are reported. UV-vis and Electrospray MS studies indicate solution stability with respect to their {Cu-5(L)(4)}(2+) cores. Magnetic susceptibility measurements confirm strong antiferromagnetic exchange between the Cu(II) ions resulting in isolated S = 1/2 ground spin states. The introduction of ditopic co-ligands such as 4,4'-bipyridine (4,4'-bipy), pyrazine (pz) and 4,4'-azopyridine (4,4'-azp) results in their coordination at a number of axial Cu(II) sites within the {Cu-5} metallacrown nodes to afford the extended networks {[Cu-5(L-1)(4)(4,4'-bipy)(3)](ClO4)(2)center dot(H2O)}(n) (4), {[Cu-5(L-1)(4)(4,4'-azp)(2)(MeOH)(2)](ClO4)(2)}(n) (5) and {[Cu-5(L-2)(4)(pz)(2)(MeOH)(3)](ClO4)(2)center dot MeOH}(n) (6).
Funder
Publisher
Royal Society of Chemistry (RSC)
Publisher DOI
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland