Thallium(I) supramolecular polymer with Tl?π secondary interactions; Preparation of nano-structures by sonochemical method as a new precursor for preparation of Tl _2O _3 with nano-structural surface

摘要

Micro and nano-structures of a new thallium(I) supramolecular polymer, [Tl _2(μ _3-TPOAc)(μ _4-TPOAc)] _n (1) [HTPOAc = triphenylacetic acid], were synthesized by sonochemical methods. These new micro and nano-structures were characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Compound 1 was structurally characterized by single-crystal X-ray diffraction and consists of primary dimmeric unit of. Self assembly between the dimmeric units of [Tl _2(μ _3-TPOAc)(μ _4-TPOAc)] from Tl?C short contacts result in formation of a new two-dimensional thallium(I) supramolecular polymer. Two Tl ~I-ions in compound 1 have O _5Tl(1)?C _3 and O _2Tl(1A)?C _2 coordination spheres with a stereo-chemically 'active' electron lone pair on the metals. Thermal stability of compound 1 was studied by thermo gravimetric and differential thermal analyses. In addition thallium(III) oxide with nano-structural surface was prepared from calcination process of compound 1 at 873 K.