Erschienen in:European Journal of Inorganic Chemistry
Sprache:
Englisch
DOI:
10.1002/ejic.201800154
ISSN:
1434-1948;
1099-0682
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p>Four new coordination polymers (CPs) were obtained under hydrothermal reaction conditions using 2,4,6‐pyridinetricarboxylic acid (H<jats:sub>3</jats:sub>PTC) and Bi(NO<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub><jats:bold>·</jats:bold>5H<jats:sub>2</jats:sub>O. The systematic high‐throughput investigation of the system Bi<jats:sup>3+</jats:sup>/H<jats:sub>3</jats:sub>PTC/NaOH/HNO<jats:sub>3</jats:sub>/H<jats:sub>2</jats:sub>O led to the compounds [Bi(PTC)(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>] (<jats:bold>1</jats:bold>), (H<jats:sub>3</jats:sub>O)[Bi<jats:sub>2</jats:sub>(PTC)(HPTC)<jats:sub>2</jats:sub>(H<jats:sub>2</jats:sub>O)<jats:sub>2</jats:sub>] (<jats:bold>2</jats:bold>), α‐[Bi(PTC)] (<jats:bold>3</jats:bold>) and β‐[Bi(PTC)] (<jats:bold>4</jats:bold>), which were structurally characterised by single‐crystal X‐ray diffraction. Compounds <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold> crystallise in 2D layered structures, whereas <jats:bold>3</jats:bold> and <jats:bold>4</jats:bold> form 3D coordination networks. Employing the nomenclature proposed by Cheetham et al. <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold> are classified as I<jats:sup>1</jats:sup>O<jats:sup>1</jats:sup> (mixed inorganic–organic layers), <jats:bold>3</jats:bold> as I<jats:sup>0</jats:sup>O<jats:sup>3</jats:sup> (3D coordination polymers) and <jats:bold>4</jats:bold> as I<jats:sup>1</jats:sup>O<jats:sup>2</jats:sup> (mixed inorganic–organic 3D framework). In all cases the nitrogen atom of the linker is coordinated to the Bi<jats:sup>3+</jats:sup> 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 <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold> were studied resulting in a yellow and blue–green luminescence under UV light with emission maxima at 570 nm (<jats:italic>λ</jats:italic><jats:sub>ex</jats:sub> = 343 nm) and 483 nm (<jats:italic>λ</jats:italic><jats:sub>ex</jats:sub> = 347 nm) for <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold>, respectively. The differences in the spectroscopic properties could be assigned to the distinct coordination and chemical environments of the Bi<jats:sup>3+</jats:sup> ions within these compounds.</jats:p>