Crystal Structure and Optical Properties of New Hybrid Halobismuthates of 2,2'-Bipyridinium Derivatives

Russian Journal of Inorganic Chemistry. 2022. Vol. 67. No. 7. P. 1018–1024.

S. P. Balabanova, Buikin P., Ilyukhin A. B., Rudenko A. Y., Dorovatovskii P. V., Korlyukov A. A., Kotov V.

New hybrid 2,2'-bipyridinium halobismuthates ([bipyH]+) (I and II), 7,8-dihydro-6H-dipyrido[1,2-a:2',1'-c][1,4]diazepine-5,9-diium ([bipyC3]2+) (III), 6,7,8,9-tetrahydrodipyrido[1,2-a:2',1'-c][1,4]diazocin-5,10-diium ([bipyC4]2+) (IV), and 1,1'-(pentanediyl)bis(2,2'-bipyridinium) ((bipyH)2C5]4+) (V) have been isolated and characterized by X-ray diffraction. The structure of I contains a monoprotonated cation 2,2'-bipyridinium and the isolated [Bi2Br10]4– anion. 2,2'-Bipyridinium bromobismuthate II contains a polymeric anion and is isostructural to the previously described iodobismuthate. Bromobismuthate III includes [BiBr6]3– anions and water molecules. Iodobismuthate [bipyC3]2[Bi2I10] (VI) is isostructural to IV. The structure of V contains [(bipyH)2C5]4+ cations and three types of anions: [Bi2Br10]4–, [BiBr6]3–, and Br–. Compounds I, III, and VI have been isolated in pure form. The values of the optical band gap for them are 2.84, 2.88, and 2.11 eV, respectively.

Keywords: кристаллическая структура, ширина запрещенной зоны, band gap, Hybrid halobismuthates, crystal structure, галовисмутаты