Bismuth Coordination Polymers with 2,4,6-Pyridine Tricarboxylic Acid: High-Throughput Investigations, Crystal Structures and Luminescence Properties

Autor(es)

Rhauderwiek, Timo ; Cunha, Cesar dos Santos ; Terraschke, Huayna ; Stock, Norbert

• Tipo de documento: Artigo Científico
• Fonte: European Journal of Inorganic Chemistry; v. N/A, n. 27, p. 9-pg., 2018-07-23.

Resumo

Four new coordination polymers (CPs) were obtained under hydrothermal reaction conditions using 2,4,6-pyridinetricarboxylic acid (H3PTC) and Bi(NO3)(3)5H(2)O. The systematic high-throughput investigation of the system Bi3+/H3PTC/NaOH/HNO3/H2O led to the compounds [Bi(PTC)(H2O)(2)] (1), (H3O)[Bi-2(PTC)(HPTC)(2)(H2O)(2)] (2), -[Bi(PTC)] (3) and -[Bi(PTC)] (4), which were structurally characterised by single-crystal X-ray diffraction. Compounds 1 and 2 crystallise in 2D layered structures, whereas 3 and 4 form 3D coordination networks. Employing the nomenclature proposed by Cheetham et al. 1 and 2 are classified as (IO1)-O-1 (mixed inorganic-organic layers), 3 as (IO3)-O-0 (3D coordination polymers) and 4 as (IO2)-O-1 (mixed inorganic-organic 3D framework). In all cases the nitrogen atom of the linker is coordinated to the Bi3+ ion, which therefore acts as a tridentate pincer-type ligand. All title compounds were obtained as phase-pure products employing conventional or microwave-assisted heating, but the reproducibility of the synthesis depends on reactor size and material. In addition, the luminescence properties of 1 and 2 were studied resulting in a yellow and blue-green luminescence under UV light with emission maxima at 570 nm ((ex) = 343 nm) and 483 nm ((ex) = 347 nm) for 1 and 2, respectively. The differences in the spectroscopic properties could be assigned to the distinct coordination and chemical environments of the Bi3+ ions within these compounds. (AU)

• Processo FAPESP: 16/03640-9 - Investigação de alto rendimento de novas estruturas metal-orgânicas (MOFs) à base de bismuto dopado com terras raras
• Beneficiário: Cesar dos Santos Cunha
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto