4-Hydroxybenzoato-rare earth(<scp>iii</scp>) complexes – syntheses, a structural goldmine from coordination diversity and improved corrosion inhibition behaviour

Moon, Joon-Ho; Guo, Zhifang; Beaumont, Owen A.; Hamilton, Sophie E.; Bousrez, Guillaume; Mottram, Eleanor; Wang, Jun; Somers, Anthony; Deacon, Glen B.; Junk, ‬Peter C.

doi:10.1039/d3nj02735j

Cited by 1 publication

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“…[1,[6][7][8][9][10] Some of the best-performing compounds include cerium salicylate [8] lanthanum 4-hydroxycinnamate [11] and yttrium 3-(4'methylbenzoyl)propionate [12] 3-furoate [13] and 4hydroxybenzoate. [14] Emerging trends suggest that additional unsaturation, donor capacity, and the presence of donor hetero atoms play a significant role in achieving higher levels of inhibition. [8,9,12,13,15,16] Such observations support an inhibition model whereby a carboxylatolanthanoid species binds to a hydroxidoiron(III) group on a corroding surface through a donor group-hydroxide interaction.…”

Section: Introductionmentioning

confidence: 99%

Rare Earth 2‐Methyl‐3‐furoate Complexes: Effect of Steric Hindrance on Corrosion Inhibitor Properties

Vithana,

Guo,

Deacon

et al. 2024

Eur J Inorg Chem

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The preparation and characterization of six rare earth 2‐methyl‐3‐furoate (2m3fur) complexes are detailed in this study. Analysis through single‐crystal X‐ray diffraction, as well as powder XRD, reveals that all six compounds can be categorized into two structural groups: {[RE2(2m3fur)6(EtOH)]⋅H2O}n (RE = La, Ce, Pr) and [RE3(2m3fur)9]n (RE = Y, Er, Yb). These structural groups favour the formation of carboxylate coordinated linear polymers. The former complexes feature two distinct metal centers, with lattice water participating in a hydrogen bond with ethanol within the coordination sphere. The latter structures, involving erbium, ytterbium, and yttrium, consist of three unique metal centers: two eight coordinate, and one seven‐coordinated. In corrosion inhibition tests on mild steel in 0.01 M NaCl solution, the maximum efficiency was observed with [Y3(2m3fur)9]n at 59%, which is less effective compared to yttrium 3‐furoate complexes (90% efficiency). The results suggest that the steric effect of the methyl group adversely affects corrosion inhibition.

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Section: Introductionmentioning

confidence: 99%

Rare Earth 2‐Methyl‐3‐furoate Complexes: Effect of Steric Hindrance on Corrosion Inhibitor Properties

Vithana,

Guo,

Deacon

et al. 2024

Eur J Inorg Chem

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4-Hydroxybenzoato-rare earth(iii) complexes – syntheses, a structural goldmine from coordination diversity and improved corrosion inhibition behaviour

Abstract: A range of rare earth(III) 4-hydroxybenzoato (4hob) complexes has been prepared by salt metathesis reactions in water and structurally characterized by X-ray single crystal and powder diffraction. Complexes in which...

Cited by 1 publication

References 44 publications

Rare Earth 2‐Methyl‐3‐furoate Complexes: Effect of Steric Hindrance on Corrosion Inhibitor Properties

Rare Earth 2‐Methyl‐3‐furoate Complexes: Effect of Steric Hindrance on Corrosion Inhibitor Properties

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