Entangled metal-organic frameworks modulated by N-donor ligands of different conformations was written by Guo, Hua-Dong;Qiu, Dong-Fang;Guo, Xian-Min;Zheng, Guo-Li;Wang, Xiao;Dang, Song;Zhang, Hong-Jie. And the article was included in CrystEngComm in 2009.HPLC of Formula: 15420-02-7 This article mentions the following:
Based on the aromatic dicarboxylic acid and N-donor ligands with different conformations, four Zn(II) metal-organic frameworks, namely [Zn(mfda)(L1)] (1), [Zn2(mfda)2(L2)]·DMF·H2O (2), [Zn2(mfda)2(L3)(H2O)]·DMF (3) and [Zn2(mfda)2(L4)] (4) were synthesized (mfda = 9,9-dimethylfluorene-2,7-dicarboxylate anion, L1 = 1,10-phenanthroline, L2 = 4,4′-bipyridine, L3 = 2,5-bis(4-pyridyl)-1,3,4-oxadiazole and L4 = 1,4-bis(imidazol-1-ylmethyl)benzene). Single-crystal x-ray diffraction revealed that all compounds exhibit entangled structures. Compound 1 is composed of 1D zigzag chains that are entangled through the π-π stacking interactions to generate a three-fold interpenetrating diamond-like networks. 2 Exhibits a two-fold interpenetrating (αPo) net, which leaves 1D channels with high free volume In 3, parallel mutual polythreadings of 2D layers are connected by hydrogen bonds into a self-penetrating framework with (44·610·7)(4·5·6)(46·52·616·73·9) topol. For 4, the interpenetrating 2D layers are connected into a self-interpenetrating net with (49·66) topol. The potential of N-donor ligands to produce interesting metal-organic frameworks was studied. Luminescent studies show that 1–4 exhibit strong blue fluorescent emissions. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7HPLC of Formula: 15420-02-7).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.HPLC of Formula: 15420-02-7