On September 28, 2020, Gong, Yu; Li, Zhi-Hua; Yan, Xiaodong; Wang, Ya-Qin; Zhao, Chen-Yang; Han, Wang-Kang; Hu, Qing-Tao; Lu, Hui-Shu; Gu, Zhi-Guo published an article.Application of 34413-35-9 The title of the article was Bivariate Metal-Organic Frameworks with Tunable Spin-Crossover Properties. And the article contained the following:
In this work, pyrazine (A), aminopyrazine (B), quinoxaline (C), and 5,6,7,8-tetrahydroquinoxaline (D) have been screened out among a large number of pyrazine derivatives to construct Hofmann-type metal-organic frameworks (MOFs) Fe(L)[M(CN)4] (M=Pt, Pd) with similar 3D pillared-layer structures. X-ray single-crystal diffraction reveals that the alternate linkage between M and FeII ions through cyano bridges forms the 2D extended metal cyanide sheets, and ligands A-D acted as vertical columns to connect the 2D sheets to give 3D pillared-layer structures. Subsequently, a series of bivariate MOFs were constructed by pairwise combination of the four ligands A-D, which were confirmed by 1H NMR, PXRD, FTIR, and Raman spectroscopy. The results demonstrated that ligand size and crystallization rate play a dominant role in constructing bivariate Hofmann-type MOFs. More importantly, the spin-crossover (SCO) properties of the bivariate MOFs can be finely tuned by adjusting the proportion of the two pillared ligands in the 3D Hofmann-type structures. Remarkably, the spin transition temperatures, Tc↑ and Tc↓ of Fe(A)x(B)1-x[Pt(CN)4] (x=0 to 1) can be adjusted from 239 to 254 K and from 248 to 284 K, resp. Meanwhile, the width of the hysteresis loops can be widened from 9 to 30 K. Changing Pt to Pd, the hysteresis loops of Fe(A)x(B)1-x[Pd(CN)4] can be tuned from 9 (Tc↑=215 K, Tc↓=206 K) to 24 K (Tc↑=300 K, Tc↓=276 K). This research provides wider implications in the development of advanced bistable materials, especially in precisely regulating SCO properties. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).Application of 34413-35-9
The Article related to iron pyrazine quinoxaline platinum palladium cyano mof preparation, spin crossover iron pyrazine quinoxaline platinum palladium cyano mof, thermal stability iron pyrazine quinoxaline platinum palladium cyano mof, crystal structure iron pyrazine quinoxaline platinum palladium cyano mof, hofmann, bivariate, hysteresis loops, metal-organic frameworks, spin-crossover and other aspects.Application of 34413-35-9
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider