Crystal structure, optical characterization, conduction and relaxation mechanisms of a new hybrid compound (C 6 H 9 N 2 ) 2 [Sb 2 Cl 8 ].

Hybrid materials play a crucial role in the construction of flexible electronic devices due to the advantages of both organic and inorganic components. To this end, a new hybrid compound (C 6 H 9 N 2 ) 2 [Sb 2 Cl 8 ] was successfully fabricated using the slow evaporation solution growth approach at room temperature. In-depth research has been done on the structural, optical, and dielectric characteristics. This compound adopts the triclinic symmetry and crystallizes in the centrosymmetric space group P 1̄. The inorganic and organic components respectively form anionic and cationic layers parallel to the ac -plane and alternate along the crystallographic b -axis. The [Sb 2 Cl 8 ] 2- dimeric units are bound to the 2-amino-5-picolinium cations [(C 6 H 9 N 2 )] + through N-H⋯Cl hydrogen bonds. Optical absorption measurements showed a semiconductor behavior with a band gap of approximately 3.57 eV. In addition, DFT calculations were performed to investigate the absorption spectrum, wavelength, and HOMO-LUMO gap. The analysis of complex impedance spectra shows that the electrical conductivity of the sample is strongly frequency and temperature dependent, indicating a relaxation phenomenon and semiconductor-type behavior. Dielectric data obtained from complex impedance spectroscopy and ac conductivity with the use of the Maxwell-Wagner equivalent circuit model, and the universal power law have been investigated to explore the basic components of the electronic transport and relaxation process in our material.