Two Cu-complex directed aluminoborates: from 2D layers to 3D frameworks.

With transition metal complexes as the structure-directing agents, two novel aluminoborates with a 2D layer [Cu(enMe)2]3{Al2[B5O8(OH)2]4}.H2O (1, enMe = 1,2-diaminopropane) and a 3D open-framework [Cu(en)2][Al-B5O10] (2, en = ethylenediamine) have been solvothermally prepared and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, UV/Vis spectroscopy, powder and singlecrystal X-ray diffraction. 1 is a 2D {Al[B5O8(OH)2]2}3- layer constructed by the alternate linkages of AlO4 groups and B5O8(OH)2 clusters. The 2D layer contains 16-member rings (MRs), showing a unique sql net topology. In 2, the AlO4 groups and B5O10 clusters alternately link together to form a 3D framework, in which the stacking of building layers is different. The copper centres are chelated by two amine ligands to form a square planar, which have weak axial interactions with the aluminoborate frameworks. [ABSTRACT FROM AUTHOR]