Статья

Solvothermal synthesis and multifunctional characterization of a two-dimensional Mn(II) coordination polymer with dibromoterephthalate linkers: Dielectric, BET, and hirshfeld surface studies

Bakhtiyor Chori ugli TursunovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanKhayit Khudaynazarovich TuraevDepartment of Chemistry, Termez State University, 43 Barkamol Avlod Street, Termez, 190111, UzbekistanYuldash Yusupbaevich YakubovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanAsliddin Abdurashid ugli ErnazarovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanVoggu Kesava ReddyCMR Technical Campus, Kandlakoya, Medchal, Secunderabad, Telangana, 501401, IndiaKuvonch Bakhtiyor ugli KholturaevDepartment of Chemistry, Termez State University, 43 Barkamol Avlod Street, Termez, 190111, UzbekistanAbror Kh. RuzmetovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanAdkhamjon Sadullayevich NormamatovInstitute of Bioorganic Chemistry, Uzbekistan Academy of Sciences, Kh. Abdullaev Str., 83, Tashkent, 100143, UzbekistanAvazbek Bakhtiyarovich IbragimovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanMadumar MusurmonovKimyo International University, 156 Shota Rustaveli Street, Tashkent, 100121, UzbekistanAbdusamat RasulovDepartment of Medicine, Termez University of Economics and Service, Surkhandarya, Farovon Street 4-b, Termez, 190111, UzbekistanAziz Bakhtiyarovich IbragimovInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, UzbekistanC. BalakrishnanInstitute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences, Mirzo Ulug’bek str., 77a, Tashkent, 100170, Uzbekistan

2026en

ABI

Аннотация

A new two-dimensional Mn(II)-based coordination polymer, poly[(μ 2 -2,5-dibromobenzene-1,4-dicarboxylato-κ 2 O:O′)bis(μ 2 -formato-κ 2 O:O′)bis(N,N-dimethylformamide-κO)dimanganese(II)] ([Mn 2 (Br 2 BDC)(Fo) 2 (DMF) 2 ] n ), was synthesized solvothermally at 150 °C for 24 h and obtained in approximately 75% yield. Single-crystal X-ray diffraction revealed a trigonal centrosymmetric structure with space group P-3, in which Mn(II) adopts a slightly distorted MnO 6 octahedral coordination environment, and Br 2 BDC/formate bridges generate an extended two-dimensional framework. Hirshfeld surface analysis showed that H···H (24.8%), H···O/O···H (20.6%), Br···H/H···Br (13.0%), and Mn···O/O···Mn (9.8%) contacts make major contributions to crystal packing. Thermal analysis revealed three main decomposition stages with weight losses of 20.8%, 19.2%, and 14.1%, while nitrogen adsorption–desorption measurements indicated Type IV mesoporous behaviour with a Brunauer–Emmett–Teller (BET) surface area of 68.22 m 2 g –1 and an average pore radius of 29.19 Å. Dielectric measurements demonstrated frequency- and temperature-dependent polarization with reduced dielectric loss at higher frequencies. A.C. conductivity measurements showed frequency-dependent hopping transport, reaching approximately 1.0 × 10 –4 S m –1 in the high-frequency region at 40 °C. Complementary ESP, NCI–RDG, ELF, LOL, and IRI analyses further provided insights into the electrostatic distribution, non-covalent interactions, and electron localization within the coordination framework. The combined structural and physicochemical characteristics highlight [Mn 2 (Br 2 BDC)(Fo) 2 (DMF) 2 ] n as a promising multifunctional coordination material for potential dielectric, insulating, and adsorption-related applications.

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Идентификаторы

DOI: 10.1016/j.nxmate.2026.103562

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