Synthesis, spectroscopic and X‐ray single‐crystal structure study of bis(2‐methoxy‐ethanolato)‐bis(8‐quinolinato)titanium(IV)

Abstract

OCH 3 ) 2 has been determined by single-crystal X-ray structure analysis. The geometry at titanium is a distorted octahedron, with the nitrogen atoms of quinolinate occupying the trans position with respect to oxygens of the 2-methoxyethoxy groups. The prepared quinolinate derivatives of titanium alkoxides are very stable towards hydrolysis and harsh conditions are required for hydrolytic cleavage.

(DiMeIHeptCl)Pd: A Low-Load Catalyst for Solvent-Free (Melt) Amination

“…A common method to couple phenol-containing partners is with LiHMDS as base; , however, in melt conditions, this gave negligible yields. On the basis of the literature, − we propose that Lewis acids react with the phenol to form a neutral species of the type ArOAl­(OAlk) 2 or ArOTi­(OAlk) 3 , thus masking nucleophilic phenolate and making oxidation to N-aryl iminoquinones impossible. On the other hand, Lewis acids could also promote reductive elimination …”

A novel trimeric Zn (II) complex based on 8-hydroxyquinoline with trifluoromethylbenzene group: Synthesis, crystal structure, photophysical properties and DNA binding

“…Research suggests that the zinc analog of light-emitting materials AlQ 3 , zinc bis(8-hydroxyquinoline) [ZnQ 2 ] has a better injection efficiency, a lower operating voltage, and higher quantum yields than the commonly used AlQ 3 [6]. Thus zinc complexes may be potential candidates to enhance the efficiency and lifetime of OLEDs [7][8]. Meanwhile, Sapochak et al revealed that improvements of electroluminescence (EL) performance might be achieved by control of the oligomerization of 8-hydroxyquinoline chelates of Zn(II) and/or enhancement of the PL efficiency by judicious substitution of the ligand.…”

The synthesis, characterization and electroluminescent properties of zinc(II) complexes for single-layer organic light-emitting diodes

“…Therefore, the carbazole group has been commonly used as a functional building block in the fabrication of organic photoconductors, non-linear optical devices and OLEDs [12][13][14][15]. On the other hand, 8-hydroxyquinoline metal chelates are presently considered as one of the most reliable electro-transporting and emitting materials applied in molecularbased OLEDs for their thermal stability, high fluorescence, and excellent electron-transporting mobility [16][17][18]. In many cases, the electron-transporting mobility of zinc complexes with 8-hydroxyquinoline goes beyond that of aluminum complexes which is the most widely used electron-transporting material in OLEDs.…”