Structural and Photoluminescence Studies of a Europium(III) Tetrakis(β-diketonate) Complex with Tetrabutylammonium, Imidazolium, Pyridinium and Silica-Supported Imidazolium Counterions was written by Bruno, Sofia M.;Ferreira, Rute A. S.;Almeida Paz, Filipe A.;Carlos, Luis D.;Pillinger, Martyn;Ribeiro-Claro, Paulo;Goncalves, Isabel S.. And the article was included in Inorganic Chemistry in 2009.Application In Synthesis of 1-Methyl-3-propylimidazolium Chloride This article mentions the following:
Tetrakis(naphthoyltrifluoroacetonato)lanthanate(III) complexes (Ln = Eu, Gd) containing the cations Bu4N, [NBu4]+; 1-butyl-3-methylimidazolium, [C4mim]+; and 1-butyl-3-methylpyridinium, [C4mpyr]+, were prepared and structurally characterized by single-crystal x-ray diffraction. The {EuO8} coordination sphere in [NBu4][Eu(NTA)4] is best described as a distorted dodecahedron, where the metal ion is located at the 4-fold inversion axis with only one crystallog. independent NTA residue. In [C4mim][Eu(NTA)4] and [C4mpyr][Gd(NTA)4], the central Ln3+ ions are coordinated by eight O atoms from four distinct β-diketonate ligands, in an overall distorted square-antiprismatic geometry. Besides electrostatic interactions, the crystal packing in all three structures is stabilized by offset π-π interactions involving the naphthyl rings of neighboring complexes (and, for [C4mim][Eu(NTA)4] and [C4mpyr][Gd(NTA)4], neighboring naphthyl/imidazolium and naphthyl/pyridinium rings) and C-H···π contacts. The photoluminescence properties of the three EuIII complexes were studied at room temperature and -259° by measuring emission and excitation spectra, 5D emission decay curves, and absolute emission quantum yields. Under ligand excitation (λex = 290-395 nm), the quantum yields (room temperature) were in the range 0.72-0.77 for the 1-butyl-3-methylimidazolium salt. An immobilized analog of this complex was prepared by supporting [Eu(NTA)4]– on an ordered mesoporous SiO2 derivatized with 1-propyl-3-methylimidazolium groups. The disappearance of the intra-4f6 lines in the excitation spectrum of the supported material indicated an increase in the ligand’s sensitization process of the Eu3+ ions, relative to direct intra-4f6 excitation. The emission quantum yield measured for the supported material (0.32-0.40, for excitations between 265 and 360 nm) is the highest so far reported for lanthanide-containing ordered mesoporous silicas. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Application In Synthesis of 1-Methyl-3-propylimidazolium Chloride).
1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. This ring system is present in important biological building blocks, such as histidine and the related hormone histamine.Application In Synthesis of 1-Methyl-3-propylimidazolium Chloride
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem