Herein we present a new metalloligand, Th(6)L(12) [IHEP-10; L = 4-pyrazolecarboxylic acid (H(2)PyC)], which can be used to generate a novel multicomponent heterometallic metal-organic framework (MOF), [[Cu(3)(μ(3)-OH)(NO(3))(H(2)O)(2)](2)Th(6)(μ(3)-O)(4)(μ(3)-OH)(4)(PyC)(6)(HPyC)(6)(H(2)O)(6)](NO(3))(2) (IHEP-11), through further assembly with second [Cu(3)(μ(3)-OH)(PyC)(3)] clusters. In IHEP-11, six Cu(3) clusters are connected by six NO(3)(-) anions to form an unprecedented annular Cu(18) cluster, which can be viewed as a 12-connected nod...