Layered structure of a supramolecular hybrid sulfate salts: Thermal stability and magnetic behavior

Abstract

Please cite this article as: O. Kammoun, H. Naïli, W. Rekik, T. Bataille, Layered structure of a supramolecular hybrid sulfate salts: thermal stability and magnetic behavior, Inorganica Chimica Acta (2015), doi: http://dx. AbstractThe incorporation of the aromatic diamine 2-methylimidazole as template in the synthesis of hybrid sulfate salts with transition metal was effected by the slow evaporation method. The resulting structure presents a lamellar character with a supramolecular network, which is uncommon in the family of sulfates and their derivates. The three synthesized compound with the general formula (C 4 H 7 N 2 ) 2 [M II (H 2 O) 6 ](SO 4 ) 2 ·2H 2 O (M II = Zn, Co and Mn) crystallize in the monoclinic symmetry, space group P2 1 /c. According to the design shape of the protonated amine and its bonding relations between the supramolecular inorganic layers, building from hydrogen bond only, the interlamellar distance reached 11.6 Å. The π-stacking between aromatic moieties of amines have a relevant role in stabilizing the lamellar structure. The thermal study with in situ powder X-ray diffraction and thermogravimetry of the synthesized compounds showed that the dehydration stage of precursors lead to the formation of an anhydrous crystalline phase with a good thermal stability. Beyond this and under the decomposition stage, Co and Zn compound become amorphous whereas the Mn-based compound showed successive crystalline phases. The magnetic measurements performed for the cobalt based compound indicate a low interaction exchange within the material in agreement with a typical paramagnetic behavior.

Structure Evolution and Thermal Decomposition of Supramolecular and Lamellar Hybrid Sulfates Templated by 4-Aminopyridinium

“…Despite the supramolecular network constructed by weak hydrogen bonds and interactions, an important thermal stability similar to that of lamellar materials has been demonstrated. Previously, hybrid lamellar M(II)-sulfate compounds have been developed by our group for their pertinent properties such as magnetic, magnetoelectronic and catalytic properties [40][41][42][43]. We have also demonstrate the anti-microbial, antifungal and antioxidant activities of the (C 6 H 9 N 2 ) 2 [M II (H 2 O) 6 ](SO4) 2 •2H 2 O with M = Co and Ni [44].…”

Crystal growth, phase transition, and nuclear magnetic resonance of organic–inorganic hybrid perovskite NH2(CH3)2CdCl3

“…Organic-inorganic hybrid perovskite crystals based on metal halides have received increasing attention owing to their interesting optoelectronic, electrical, and magnetic properties. [1][2][3][4][5] The most common perovskite MAPbX 3 (MA = CH 3 NH 3 , X = I, Br, or Cl) based thin-lm photovoltaic devices are used as solar cells. [6][7][8][9][10][11][12][13][14] However, MAPbX 3 -based photovoltaics are highly unstable under ambient conditions, especially in the presence of moisture, and are highly toxic owing to Pb bioaccumulation.…”

Zn2+ and Cu2+ doping of one-dimensional lead-free hybrid perovskite ABX3 for white light emission and green solar cell applications

“…Nowadays, hybrid molecular crystals based on metal halides have received increasing attention for their interesting biological, opto-electronic, luminescence and magnetic properties. [1][2][3][4][5][6][7][8][9][10] Organic-inorganic metal halide-based perovskites (OIMHP) are acclaimed for their electrical and opto-electrical properties. [11][12][13][14][15][16][17][18][19][20] In fact, because of their low band gap energies around 1.5 eV, the three dimensional (3-D) OIMHP are widely used in photovoltaic solar cells (SCs).…”