[NH3CH2CHCH3NH3]][B8O11(OH)4]·H2O: Synthesis and characterization of the first 1D borate templated by 1,2-diaminopropane

✍ Scribed by Chun-Yang Pan; Guo-Ming Wang; Shou-Tian Zheng; Guo-Yu Yang

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 542 KB
• Volume: 180
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2007.01.038

✦ Synopsis

A new hydrated borate compound, [NH 3 CH 2 CHCH 3 NH 3 ]][B 8 O 11 (OH) 4 ] Á H 2 O 1, has been synthesized in the presence of 1,2diaminopropane acting as a structure-directing agent under mild conditions. Its structure was determined by single crystal X-ray diffraction and further characterized FTIR, elemental analysis, powder X-ray diffraction and thermogravimetric analysis. Compound 1 crystallizes in the monoclinic system, space group

and Z ¼ 4. The structure consists of infinite open-branched borate chains constructed from [B 3 O 6 (OH)] units, onto which the [B 5 O 7 (OH) 3 ] groups are grafted. It represents the first example of one-dimensional borate templated by an organic amine. The adjacent borate chains are further linked together by extensive hydrogen bonds to form a 3D supramolecular network. The diprotonated organic amines and guest water molecules are filled in the free space of the hydrogen-bonded network and interact with the inorganic framework by extensive hydrogen bonds.