Structural Insights into New Bi(III) Coordination Polymers with Pyridine-2,3-Dicarboxylic Acid: Photoluminescence Properties and Anti-Helicobacter pylori Activity

Abstract

Two novel coordination polymers, [Bi2(2,3pydc)2(2,3pydcH)2(H2O)]n (1) and {(Et3NH)2[Bi(2,3pydc)(2,3pydcH)Cl2]}n (2) were prepared using as a prolinker pyridine-2,3-dicarboxylic acid (2,3pydcH2). The obtained complexes were fully characterized by elemental analysis, TG/DTG, FT-IR, solid-state photoluminescence, DFT calculations and single-crystal X-ray diffraction. The obtained complexes crystallized in the triclinic P-1 space group (1) and comprise dimeric units with two crystallographically different Bi(III) centers (polyhedra: distorted pentagonal bipyramid and bicapped trigonal prism) and monoclinic P21/c space group (2) with a distorted monocapped pentagonal bipyramid of Bi(III) center. The various coordination modes of bridging carboxylate ligands are responsible for the formation of 1D chains with 4,5C10 (1) and 2C1 (2) topology. The photoluminescence quantum yield for polymer 2 is 8.36%, which makes it a good candidate for more specific studies towards Bi-based fluorescent materials. Moreover, it was detected that polymer 1 is more than twice as active against H. pylori as polymer 2. It can be concluded that there is an existing relationship between the structure and the antibacterial activity because the presence of chloride and triethylammonium ions in the structure of complex 2 reduces the antibacterial activity.

The Synthesis and Characterization of a Novel One-Dimensional Bismuth (III) Coordination Polymer as a Precursor for the Production of Bismuth (III) Oxide Nanorods

“…Then, we describe a sonochemical technique for producing nanostructures of the coordination compound and its use in the synthesis of nanoscaled Bi(III) oxide particles. and supramolecular substances could be intriguing, since a sudden accumulation of multiple bridging ligands could result in the disappearance of gaps, resulting in a less frequent holodirected configuration [13][14][15][16]. On the other hand, such as Tl(I) and Pb(II), the coordination sphere of Bi(III) is interesting (Scheme 1).…”

Biological Activities of Bismuth Compounds: An Overview of the New Findings and the Old Challenges Not Yet Overcome

“…In a similar direction, Kowalik et al prepared two Bi 3+ coordination polymers with the same pyridine-2,3-dicarboxylate ligand. One presented MIC values of 11.4 and 13.4 µM against two H. pylori strains, 26695 and N6, respectively, being about twice more active than BBS in the same bacteria strains [47]. Notably, commercially available medicinal bismuth carboxylates BSS, RBC, and CBS have MIC values against H. pylori ranging from 8 to 12.5 µg mL −1 [48].…”

Ψ-Polyhedral symbols for bismuth(III) with an active electron lone pair

“…The second form has the lone pair at a site adjacent to the capping site (Albat et al, 2017;Al-Nubi et al, 2021;Antsyshkina et al, 2006;Busch et al, 2012;Kan et al, 2017;Li et al, 2003;Rhauderwiek et al, 2018;Wibowo et al, 2012;Yu et al, 2007). The third form has the lone pair away from the capping site (Albat et al, 2017;Albat & Stock, 2018;Anamika et al, 2019;Anjaneyulu et al, 2012;Feng et al, 2018b;He et al, 2020;Kowalik et al, 2020;Luo et al, 2021;Rhauderwiek et al, 2018;Vilela et al, 2019;Wang et al, 2017a;Wibowo et al, 2010) Somewhat fewer examples of highly-coordinated coordination compounds having CN ! 8 but with inactive lone pairs are noted.…”

“…8 but with inactive lone pairs are noted. A Bi III atom in a cubic CU-8 environment is noted in an old study (Davidovich et al, 1998); other eight-coordinated systems, such as SAPR-8 (Adcock et al, 2018;Albat & Stock, 2018;Gao & Zhang, 2012;Ilyukhin & Poznyak, 2000;Kowalik et al, 2020) and DD-8 (Anamika et al, 2019;Li et al, 2003;Kowalik et al, 2020), are known.…”