Tailoring microstructures of isopolymolybdates: regular tuning of the ligand spacer length and metal coordination preferences.
Four new isopolymolybdate compounds based on two kinds of isomers, [Cu(I)(2)bte][a-Mo(3)O(10)] (1), [Cu(I)(2)btp][b-Mo(3)O(10)].H(2)O (2), [Cu(II)(bte)(1.5)(H(2)O)][gamma-Mo(8)O(26)](0.5) (3) and [Cu(II)(btp)(2)(H(2)O)][beta-Mo(8)O(26)](0.5).2H(2)O (4) [bte = 1,2-bis(1,2,4-triazol-1-yl)ethane, btp = 1,3-bis(1,2,4-triazol-1-yl)propane], were obtained under hydrothermal conditions, indicating that isopolymolybdate clusters can be tailored by regular tuning of the spacer length of the flexible ligands and the metal coordination preferences. In compound 1, wave-like a-[Mo(3)O(10)](2-) chains intersect with [Cu(I)(2)bte](2+) chains by sharing Cu(I) cations, forming a 3D framework. Compound 2, with a similar 3D structure but different ligand (btp) to 1, is based on linear b-[Mo(3)O(10)](2-) chains. In compound 3, gamma-[Mo(8)O(26)](4-) chains insert into the rectangular windows of parallel [Cu(II)(2)bte](4+) sheets and connect them via four Cu(II)-O bonds, leading to a 3D framework. Compound 4 is an unusual 2D-->3D polycatenated array of a [Cu(II)(btp)(2)(H(2)O)][beta-Mo(8)O(26)] pillar-layered framework. The thermal stability and luminescent properties of compounds 1-4 were investigated in the solid state.
Zhang
Chun-Jing
CJ
Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Pang
Hai-Jun
HJ
Tang
Qun
Q
Wang
Hui-Yuan
HY
Chen
Ya-Guang
YG
D002412:Cations / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D008024:Ligands; D049449:Luminescence; D008670:Metals / Q000737:chemistry*; D055616:Microtechnology; D008958:Models, Molecular; D015394:Molecular Structure; D008982:Molybdenum / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
D002412:Cations; D003300:Copper; D008024:Ligands; D008670:Metals; D008982:Molybdenum; D011108:Polymers; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates; C044659:molybdate