Structural properties of scandium inorganic salts

Sears, Jeremiah M.; Boyle, Timothy J.

doi:10.1016/j.ccr.2016.12.005

Cited by 14 publications

(6 citation statements)

References 114 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is proclaimed also in literature that the Sc ions being Pearson hard acids prefers to form strong complexes with phosphate groups and is therefore difficult to be desorbed by inorganic acids. 6,29,30 Nevertheless, the reusability results demonstrated steady adsorption and desorption from the 2 nd to 50 th cycle in all consecutive cycles; with an average of 60 ± 4 % adsorption and 98 ± 4 % desorption. The average TGA mass loss of BP-TCPSi measured after the 50 cycles was 2.3± 0.6 % w/w, which was 0.3 % w/w higher compared to untreated BP-TCPSi (Figure S11).…”

Section: Reusability Of Bp-tcpsimentioning

confidence: 92%

See 1 more Smart Citation

Bisphosphonate modified mesoporous silicon for scandium adsorption

Thapa

Nissinen

Turhanen

et al. 2020

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Section: Reusability Of Bp-tcpsimentioning

confidence: 92%

“…Ligands with larger bite angle favors larger ions while the smaller bite angle to smaller ions. 28,29 The O-Sc-O angle in the Sc-PO4 complexes have wider and larger range of 63.35 -104.76° than in the Sc-SO4 complexes of 82.96 -95.61°. 29…”

Section: 𝑆𝐹 = 𝐶 𝑑𝑒𝑠 (𝑆𝑐)mentioning

confidence: 99%

Bisphosphonate modified mesoporous silicon for scandium adsorption

Thapa

Nissinen

Turhanen

et al. 2020

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

“…2 More recent work 3 has shown that there are significant differences, especially for scandium, and the structural chemistry of scandium is surprisingly diverse. 4 A rich, but synthetically challenging, organometallic chemistry of both metals has been explored in recent years, 5 and C-H bond activation, ethene, styrene and α-olefin polymerisation, and aromatic C-F bond activation have all been…”

Section: Introductionmentioning

confidence: 99%

Group 3 metal trihalide complexes with neutral N-donor ligands – exploring their affinity towards fluoride

et al. 2018

View full text Add to dashboard Cite

Fluorination of [ScCl3(Me3-tacn)] (Me3-tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane) and [ScCl3(BnMe2-tacn)] (BnMe2-tacn = 1,4-dimethyl-7-benzyl-1,4,7-triazacyclononane) by Cl/F exchange with 3 mol. equiv. of anhydrous [NMe4]F in CH3CN solution yields the corresponding [ScF3(R3-tacn)] (R3 = Me3 or BnMe2). These are the first examples of scandium fluoride complexes containing neutral co-ligands. The fluorination occurs stepwise, and using a deficit of [NMe4]F produced [ScF2Cl(Me3-tacn)]. Attempts to fluorinate [YCl3(Me3-tacn)], [YI3(Me3-tacn)], [LaCl3(Me3-tacn)(OH2)] or [MCl3(terpy)] (M = Sc, Y or La; terpy = 2,2':6'2''-terpyridyl) using a similar method were unsuccessful, due to the Cl/F exchange being accompanied by loss of the neutral ligand from the metal centre. Fluorination of [ScCl3(Me3-tacn)] or [ScCl3(terpy)] with Me3SnF was also successful. The products were identified as the very unusual heterobimetallic [Sc(Me3-tacn)F2(μ-F)SnMe3Cl] and [Sc(terpy)F(μ-F)2(SnMe3Cl)2], in which the Me3SnCl formed in the reaction behaves as a weak Lewis acid towards the scandium fluoride complex, linked by Sc-F-Sn bridges. [Sc(terpy)F(μ-F)2(SnMe3Cl)2] decomposes irreversibly in solution but, whilst multinuclear NMR data show that [Sc(Me3-tacn)F2(μ-F)SnMe3Cl] is dissociated into the [ScF3(Me3-tacn)] and Me3SnCl in CH3CN solution, the bimetallic complex reforms upon evaporation of the solvent. The new scandium fluoride complexes and the chloride precursors have been characterised by microanalysis, IR and multinuclear NMR (1H, 19F, 45Sc) spectroscopy as appropriate. X-ray crystal structures provide unambiguous evidence for the identities of [Sc(Me3-tacn)F2(μ-F)SnMe3Cl], [ScF2Cl(Me3-tacn)], [YI3(Me3-tacn)], [{YI2(Me3-tacn)}2(μ-O)], [ScCl3(terpy)], [YCl3(terpy)(OH2)], and [{La(terpy)(OH2)Cl2}2(μ-Cl)2]. Once formed, the [ScF3(R3-tacn)] complexes are stable in water and unaffected by a ten-fold excess of Cl- or MeCO2-, although they are immediately decomposed by excess F-. The potential use of [ScF3(R3-tacn)] type complexes as platforms for 18F PET (positron emission tomography) radiopharmaceuticals is briefly discussed. Attempts to use the Group 3 fluoride "hydrates", MF3·xH2O, as precursors were unsuccessful; no reaction with R3-tacn or terpy occurred either on reflux in CH3CN or under hydrothermal conditions (H2O, 180° C, 15 h). PXRD data showed that these "hydrates" actually contain the anhydrous metal trifluorides with small amounts of surface or interstitial water.

show abstract

“…Solvates of Sc(pic)3 with the same group of ligands all contain 6-coordinate Sc(III) in their crystals [153], seemingly reflecting an effect of ligand bulk not seen with the lanthanides. It should be borne in mind that the chemistry of scandium has been less studied than any of the other metals discussed in this article, and that new discoveries showing the richness of its chemistry are continually being made [155,156].…”

Section: Discussionmentioning

confidence: 99%