(1-Butyl-4-methyl-pyridinium)[Cu(SCN)2]: A Coordination Polymer and Ionic Liquid was written by Spielberg, Eike T.;Edengeiser, Eugen;Mallick, Bert;Havenith, Martina;Mudring, Anja-Verena. And the article was included in Chemistry – A European Journal in 2014.Application of 65350-59-6 This article mentions the following:
The compound (C4C1py)[Cu(SCN)2] (1), (C4C1py = 1-Butyl-4-methyl-pyridinium), which can be obtained from CuSCN and the ionic liquid (C4C1py)(SCN), turns out to be a new organic-inorganic hybrid material as it qualifies both, as a coordination polymer and an ionic liquid It features linked [Cu(SCN)2]– units, in which the thiocyanates bridge the copper ions in a μ1,3-fashion. The resulting one-dimensional chains run along the a axis, separated by the C4C1py counterions. Powder x-ray diffraction not only confirms the single-crystal X-ray structure solution but proves the reformation of the coordination polymer from an isotropic melt. However, the materials shows a complex thermal behavior often encountered for ionic liquids such as a strong tendency to form a supercooled melt. At a relatively high cooling rate, glass formation is observed When heating this melt in DSC and temperature-dependent polarizing optical microscopy (POM), studies reveal the existence of a less thermodynamically stable crystalline polymorph. Raman measurements conducted at 10 and 100° point towards the formation of polyanionic chain fragments in the melt. Solid-state UV/visible spectroscopy shows a broad absorption band around 18,870 cm-1 (530 nm) and another strong one <20,000 cm-1 (<500 nm). The latter is attributed to the d(CuI)→π*(SCN)-MLCT (metal-to-ligand charge transfer) transition within the coordination polymer yielding an energy gap of 2.4 eV. At room temperature and upon irradiation with UV light, the material shows a weak fluorescence band at 15,870 cm-1 (630 nm) with a quantum efficiency of 0.90(2)% and a lifetime of 131(2) ns. Upon lowering the temperature, the luminescence intensity strongly increases. Simultaneously, the band around 450 nm in the excitation spectrum decreases. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Application of 65350-59-6).
1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Application of 65350-59-6