TY - JOUR
T1 - Scandium(III) coordination polymers containing capsules based on two p-sulfonatocalix[4]arenes
AU - Webb, Helen R.
AU - Hardie, Michaele J.
AU - Raston, Colin L.
PY - 2001/8/17
Y1 - 2001/8/17
N2 - Reactions of sodium p-sulfonatocalix[4]arene and scandium(III) tristriflate in the presence, and absence, of [18]crown-6 give the crystalline complexes [Sc2(μ-OH)2(H2O)10] {Na4(H2O)8-[calix[4]arene(SO3) 4]2} · 13H2O and {[Sc2(μ-OH)2(H2O)8] [Sc(H2O)4]2[calix[4]-arene(SO3) 4-H+]2([18]crown-6)} · 16 H2O. Both complexes involve novel coordination polymers with calixarene units linked through sodium or scandium centers and also feature capsule assemblies through to the head-to-head association of calixarenes. A linear array of capsules associated with an infinite chain of aquo-bridged sodium ions, and an aquated hydroxy-bridged scandium(III) dimer, [Sc2(μ-OH)2(H2O)10] 4+, are found in the absence of the crown ether. In the presence of [18]crown-6 both hydrated scandium monomers and dimers bridge between calixarenes in a two-dimensional coordination network. The crown ethers reside in cavities created by two calixarenes from adjacent polymeric sheets via a variety of supramolecular interactions(hydrogen-bonding, shape complementarity), and effectively add a third dimension to the network. The extended structure of both of these polymers is highly porous, and resembles a bilayer.
AB - Reactions of sodium p-sulfonatocalix[4]arene and scandium(III) tristriflate in the presence, and absence, of [18]crown-6 give the crystalline complexes [Sc2(μ-OH)2(H2O)10] {Na4(H2O)8-[calix[4]arene(SO3) 4]2} · 13H2O and {[Sc2(μ-OH)2(H2O)8] [Sc(H2O)4]2[calix[4]-arene(SO3) 4-H+]2([18]crown-6)} · 16 H2O. Both complexes involve novel coordination polymers with calixarene units linked through sodium or scandium centers and also feature capsule assemblies through to the head-to-head association of calixarenes. A linear array of capsules associated with an infinite chain of aquo-bridged sodium ions, and an aquated hydroxy-bridged scandium(III) dimer, [Sc2(μ-OH)2(H2O)10] 4+, are found in the absence of the crown ether. In the presence of [18]crown-6 both hydrated scandium monomers and dimers bridge between calixarenes in a two-dimensional coordination network. The crown ethers reside in cavities created by two calixarenes from adjacent polymeric sheets via a variety of supramolecular interactions(hydrogen-bonding, shape complementarity), and effectively add a third dimension to the network. The extended structure of both of these polymers is highly porous, and resembles a bilayer.
KW - Calixarenes
KW - Coordination polymers
KW - Host-guest systems
KW - Scandium
UR - http://www.scopus.com/inward/record.url?scp=0035902868&partnerID=8YFLogxK
U2 - 10.1002/1521-3765(20010817)7:16<3616::AID-CHEM3616>3.0.CO;2-V
DO - 10.1002/1521-3765(20010817)7:16<3616::AID-CHEM3616>3.0.CO;2-V
M3 - Article
C2 - 11560333
AN - SCOPUS:0035902868
SN - 0947-6539
VL - 7
SP - 3616
EP - 3620
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 16
ER -