Structural characterization, thermal, dielectric and vibrational properties of tris(allylammonium) hexabromoantimonate(III), (C3H5NH3)3SbBr6

Experimental (FTIR, Raman, UV–visible and PL) and theoretical (DFT and TDDFT) studies on bis(8–hydroxyquinolinium) tetrachlorocobaltate(II) compound

“…The physical and chemical properties of functional materials are strongly depending on their size, shape and dimensionality [14]. Additionally, the interaction between the cationic and anionic substructures significantly affects the creation of ferroelectricity in these organic-inorganic hybrid materials; these types of materials have received much attention due to their unusual topological properties [15]. The hybrid compounds based en cobalt halide constantly attracts the interests of chemists for their structural flexibility.…”

Tris(allylammonium) Hexabromobismuthate(III) – Crystal Structure, Phase Transitions and Thermal, Dielectric, Vibrational and 1H NMR Properties Over a Range of Temperatures

“…The sequence of PTs in the analysed allylammonium analogues [23][24][25] is presented in Figure 14. According to the anionic framework, all the allylammonium compounds can be divided into two subgroups.…”

“…Additionally, the IR spectrum was recorded, in a Fluorolube suspension, covering the above-mentioned regions. The assignments of the observed bands in the IR and Raman spectra were made on the basis of the literature data for the neat allylamine [28] and allylammonium cations [25] and the internal modes of BiBr 6 3- (Table 1). [29] Figure 8.…”

“…[16][17][18] In the case of the n-alkylammonium cations incorporated into the crystal structure of halogenoantimonates(III) and halogenobismuthates(III), an increase of the alkyl chain length (n-propyl-, n-butyl-and n-pentylammonium) resulted in an increase in the complexity of the phase transition sequence because of various possible reorientational motions and conformational states of the organic moieties. [19][20][21][22] Recently, three allylammonium analogues, namely (C 3 H 5 NH 3 ) 2 SbCl 5 ·(C 3 H 5 NH 3 )Cl, [23] (C 3 H 5 NH 3 ) 3 BiCl 6 [24] and (C 3 H 5 NH 3 ) 3 SbBr 6 [25] were synthesised and structurally characterised. These compounds undergo structural phase transitions, mostly below room temperature and this was explained in terms of the dynamics of the allylammonium cations.…”

Crystal structure of bis(allylammonium) oxalate

“…For the crystal structures of oxalic acid salts with aliphatic amines, see: Dziuk et al (2014a,b); Braga et al (2013); Ejsmont & Zaleski (2006a,b); Ejsmont (2006Ejsmont ( , 2007. For the crystal structures of salts with disordered allylammonium cations, see: Płowaś et al (2010); Zarychta et al (2007) Symmetry codes: (i) x À 1; y; z; (ii) Àx þ 1 2 ; y þ 1 2 ; Àz þ 1 2 ; (iii) x þ 1; y; z; (iv) x; y À 1; z;…”