7069-05-8

Usage

InChI:InChI=1/2C9H7NO.Ca/c2*11-8-5-1-3-7-4-2-6-10-9(7)8;/h2*1-6,11H;/q;;+2/p-2

Upstream product

• 2872-54-0 sodium 8-quinolinolate 
• 14336-71-1 calcium chloride 
• 148-24-3 8-quinolinol 

Relevant academic research and scientific papers

Strictly linear trinuclear Dy-Ca/Mg-Dy single-molecule magnets: The impact of long-range f-f ferromagnetic interactions on suppressing quantum tunnelling of magnetization leading to slow magnetic relaxation

The synthesis, structural characterization and magnetic properties of four heterometallic complexes with formulas Ln2M(OQ)8 [Ln(iii) = Dy, M(ii) = Ca (1), Mg (2); Ln(iii) = Er, M(ii) = Ca (3), Mg (4); HOQ = 8-hydroxyquinoline] are reported. Complexes display a perfectly linear arrangement of three metal ions involving two terminal Ln(iii) ions and one central alkaline earth M(ii) ion, and they are bridged by three phenolato oxygen atoms from three 8-hydroxyquinoline ligands. Direct-current (dc) magnetic susceptibility studies show that there exists a long-range ferromagnetic (FM) interaction between two f-electronic centers in Dy-based complexes 1 and 2 albeit they are separated by diamagnetic alkaline earth ions, and the FM interaction has been successfully reproduced by ab initio calculations. Alternating current (ac) magnetic susceptibility measurements indicate that complexes 1 and 2 exhibit significant single-molecule magnet (SMM) behaviors. This is mostly attributed to the parallel magnetic axes of individual Dy(iii) sites aligning closely to the Dy-M-Dy direction, and the linearly extending magnetic susceptibility tensors of each ion lead to the FM interaction. The dc and ac susceptibility studies of the intramolecularly diluted complexes reveal that the f-f coupling suppresses the QTMs significantly in the absence of the external magnetic field.

Method for directly preparing pure 8-quinolinol calcium

The invention relates to a method for directly preparing pure 8-quinolinol calcium. The method comprises the steps: alternately adding calcium oxide and 8-quinolinol, which serve as raw materials, into a ball milling tank, wherein the mole ratio of calcium oxide to 8-quinolinol is 1: 2, mill balls are agate balls, and the mass ratio of the mill balls to the calcium oxide and 8-quinolinol materials is (10: 1) to (20: 1); introducing nitrogen gas into the ball milling tank until the volume of the nitrogen gas introduced is 3-5 times the volume of the ball milling tank, and then, starting to carry out ball milling, wherein the revolution rate of a ball mill is 200r/min to 300r/min, the time for ball milling is 70-90 minutes, and the temperature of ball-milling reaction is maintained to 90-110 DEG C; and after the ball-milling reaction ends, carrying out discharging, cooling a reaction product to room temperature, thereby obtaining a greenish-yellow 8-quinolinol calcium product, wherein the purity is 98% to 99%, and the yield is 97% to 99%. The method has the advantages of environment-friendliness, short process flow, high reactant utilization ratio, low production cost and the like.

Method for preparing luminescent material 8-hydroxyquinoline calcium

The invention discloses a method for preparing 8-hydroxyquinoline calcium. The method comprises four steps of burdening: adding raw materials into a container at the molar ratio of calcium hydroxide to 8-hydroxyquinoline calcium of 1:2, and adding the raw materials into the deionized water for dissolving or dispersing uniformly at the molar ratio of raw material total amount to deionized water of 1kg:50L; reaction: heating and stirring for 4 hours at the temperature of 80-100DEG C; cooling and filtering: cooling to room temperature, filtering, and washing with the deionized water at 85DEG C for 3-5 times; drying: transforming the product into an oven, raising the room temperature to 105DEG C and keeping temperature for 1h, cooling to room temperature and discharging to obtain the 8-hydroxyquinoline calcium. The method disclosed by the invention can be used for solving the problems that an alkali neutralization reagent is needed to add in the tradition, a series of complex operations such as removal and purification of side products can be omitted at the same time and low yield and purity of products are caused by side products and surplus operations. The method disclosed by the invention has short process, high purity and no need of alkali neutralization reagent, is simple to operate and easy to control, is low in cost and environmentally friendly.

Expanding the series of [RE2Ca(OQ)8] structures: New heterobimetallic rare earth/alkaline earth 8-quinolinolate complexes

A series of heterobimetallic complexes [RE2Ca(OQ) 8]·nHOQ (RE = Sm, Gd, Tb, Ho, Tm, Yb, Lu, Y, Sc) and the isostructural [Gd2Mg(OQ)8] were synthesised and structurally characterised. They were mainly obtained after direct reactions of the elemental rare earth metals with calcium metal in the presence of 8-hydroxyquinoline (HOQ) and a 1,3,5-tri-tert-butyl-benzene (tBuB) flux, and some complexes were synthesised by pseudo solid-state rearrangement reactions between powdered RE(OQ)3 and AE(OQ)2 (AE = Mg, Ca) in a 1,2,4,5-tetramethylbenzene (TMB) flux, at elevated temperatures. The linear trinuclear [RE2Ca(OQ)8] moieties show a six-coordinate central calcium atom flanked by two eight-coordinate rare earth atoms surrounded by six chelating-bridging OQ and two terminal chelating OQ ligands. The structurally novel [Sc2Ca(OQ)8] has a bent Sc-Ca-Sc backbone and exhibits an eight-coordinate central calcium and two seven-coordinate scandium ions.