Liu, Zhida; Ning, Liangmin; Wang, Kaiyuan; Feng, Lixi; Gu, Wen; Liu, Xin published their research in Journal of Molecular Structure on December 5 ,2020. The article was titled 《A new imidazole-functionalized 3D-cobalt metal-organic framework as a high efficiency heterogeneous catalyst for Knoevenagel condensation reaction of furfural》.Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine The article contains the following contents:
A new 3D Co(II) based metal-organic framework [Co(pytpy)(AIP)·H2O]n (I) (C2/c)(pytpy = 4′-(4-pyridyl)-4,2′:6′,4″”-terpyridine, AIP = 5-aminoisophthalic acid) by solvothermal method was synthesized. Its crystal structure was determined with single-crystal X-ray diffraction (SC-XRD) techniques. And then Imidazole groups were introduced into I by Schiff base post-synthetic reaction to make a Lewis base sites rich MOF-based catalyst. The post-synthetic MOF-based catalyst showed an excellent performance in Knoevenagel Condensation Reaction of furfural. Moreover, the catalytic performance for others homologues of furfural RCHO [R = [5-(hydroxymethyl)furan-2-yl], 4-fluorophenyl, Pr, etc.] and malononitrile was also tested. In the experiment, the researchers used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine)
4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.