No abstract

Two novel metal-organic frameworks (MOFs) [Cu 3 (C 7 H 2 NO 5 ) 2 ] n 3 3nH 2 O (1) and [CuAg 2 (C 7 H 3 NO 5 ) 2 ] n (2) were obtained by the hydrothermal reaction. Complex 1 exhibits a three-dimensional (3,6)-connected anatase topology with the Schl€ afli symbol (4 2 .6) 2 (4 4 .6 2 .8 8 .10), while complex 2 displays a two-dimensional (3,6)-connected TiS 2 related net topology with the Schl€ afli symbol (4 3 ) 2 (4 6 .6 6 .8 3 ). The optical studies show that 1 and 2 both have good third-order nonlinear optical and luminescent properties.

We report herein the synthesis of a novel nest structured electromagnetic composite through in-situ chemical polymerization of 3-methyl thiophene (3MT) in the presence of the BaFe11.92(LaNd)0.04O19-TiO2 (BFTO) nanoparticles and MCNTs. As an absorbing material, the BFTO/MCNTs/P3MT/wax composites were prepared at various loadings of BFTO/MCNTs/P3MT (0.2:0.10:1.0 ~ 0.2:0.30:1.0), and they exhibited strong microwave absorption properties in the range of 1.0–18 GHz. When the loading of BFTO/MCNTs/P3MT is 0.2:0.30:1.0, the composite has a strongest absorbing peak at 11.04 GHz, and achieves a maximum absorbing value of −21.56 dB. The absorbing peak position moves to higher frequencies with the increase of MCNTs content. The mechanism for microwave absorption of these composites has been explained in detail.