Pyrene Tetraphosphonate‐Based Metal‐Organic Framework: Structure and Photoluminescence

Abstract

The synthesis of pyrene‐1,3,6,8‐tetrayltetrakis(phosphonic acid) (H8ptp) and its use in the preparation of a new isotypical family of Metal‐Organic Frameworks (MOF) using oxalic acid as secondary linker are reported. This new family, generally formulated as [Ln2(H4ptp)(ox)(H2O)6]·5H2O [where Ln3+ = Ce3+ (1Ce), Pr3+ (1Pr), Nd3+ (1Nd), Sm3+ (1Sm), Eu3+ (1Eu), Gd3+ (1Gd), Tb3+ (1Tb) and Dy3+ (1Dy)], were prepared under hydrothermal conditions and fully characterized using different techniques. The photoluminescence properties of 1Eu were studied, showing emission lifetimes of 0.27 ± 0.01 ms and 0.33 ± 0.01 ms at 294 K and 12 K, respectively. This family of materials, based on a fully hydrolysed tetraphosphonate pyrene ligand, constitutes the first example of MOFs obtained using this highly fluorescent organic ligand.

Pyrene Derivative Incorporated Ni MOF as an Enzyme Mimic for Noninvasive Salivary Glucose Detection Toward Diagnosis of Diabetes Mellitus

“…The stretching vibration modes of water molecules were mainly responsible for the peaks between 3050 and 3450 cm –1 . For Ni OM‑MOF , two additional peaks were observed at 877 cm –1 and 1288 cm –1 , which correspond to symmetric stretching vibrations of P–O and PO, respectively, aroused due to the presence of phosphonic acid in PyP 4 OH 8 . For additional validation of the presence of PyP 4 OH 8 with Ni MOF , emission spectra (photoluminescence (PL) spectra) were acquired for Ni MOF and Ni OM‑MOF by using Flurolog HORIBA instrument as shown in Figure c.…”

“…53 The stretching vibration modes of water molecules were mainly responsible for the peaks between 3050 and 3450 cm −1 . 54 For Ni OM-MOF , two additional peaks were observed at 877 cm −1 and 1288 cm −1 , which correspond to symmetric stretching vibrations of P−O and P�O, respectively, 55 S1 shows the major functional groups of Ni MOF and Ni OM-MOF .…”

Two Cu-Based Phosphonate Metal–Organic Frameworks as Efficient Water-Splitting Photocatalysts

“…Pyrene is a highly symmetric condensed polycyclic aromatic hydrocarbon that possesses unique characteristics such as visible light absorption, thermal stability, ability to donate electrons in its excited state, and for coordination with metal ions when functionalized . Until now and to the best of our knowledge, only three P-MOF structures have been so far reported employing pyrene phosphonate-based ligands and different cations (Ln 3+ , Ba 2+ , and Ni 2+ ), − but none of them have been tested as a HER photocatalyst.…”