Holmium chloride hexahydrate, poly(vinyl alcohol) (MM 13,000–23,000 g mol−1, 98% hydrolyzed), poly(3-hydroxy-butyrate-co-3-hydroxy-valerate) (PHB-HV) with 5% or 8% amounts of 3-hydroxy-valerate in copolymer were obtained from the Sigma-Aldrich. Acetylacetonate and chloroform were from Vetec (Brazil). Ammonium hydroxide and nitric acid were obtained from commercial suppliers and used as obtained.
Holmium chloride hexahydrate
Manufactured by Merck Group
Holmium chloride hexahydrate is an inorganic chemical compound with the formula HoCl3·6H2O. It is a crystalline solid that appears as pale green or blue-green crystals. Holmium chloride hexahydrate is primarily used as a calibration standard and in spectroscopic applications.
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2 protocols using holmium chloride hexahydrate
1
Polymer-based Composite Synthesis
2
Synthesis of Ionic Liquid-Based Compounds
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Didodecyldimethylammonium chloride (DDAB, >98%) was purchased from TCI Chemicals. 1-decyl-3methyl imidazolium chloride ([C10mim]Cl, 96%), iron (III) trichloride (99.99%) and holmium chloride hexahydrate (99.9%), were purchased from Sigma Aldrich and used without further purification. Didodecyldimethylammonium tetrachloroferrate (DDAF) was synthesized according to literature [19] by stirring didodecyldimethylammonium chloride with an equimolar amount of iron (III) chloride in methanol overnight. The solvent was removed under reduced pressure and the residue dried in vacuo at 80 °C overnight. 1-decyl-3-methyl imidazolium tetrachloroholminate ([C10mim][HoCl4]) was also synthesized according to literature [14] , whereby 1 eq. of metal chloride was added to a methanolic solution of [C10mim]Cl and stirred overnight at room temperature, then dehydrated in vacuo at 80 °C for 48 hours. The resulting product is a putty-like substance.
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