Lanthanide ions as calcium substitutes: a structural comparison of europium and calcium complexes of a ditopic calixarene

Systematic Structural Coordination Chemistry ofp‐tert‐Butyltetrathiacalix[4]arene: Main Group Metal Complexes Other Than Those of Group 1

“…[57] There is nothing to indicate that p-tert-butyltetrathiacalix [4]arene is an especially effective ligand for Ca II , the involvement of the macrocycle-S atoms in binding not leading to any marked enhancement of Ca···O interactions when compared with those in a simple calixarene system. [58] This is a conclusion of some relevance to understanding the form of the mixed Pd/Ca complexes of the thiacalixarene, discussed in an associated paper. [52] www.eurjic.…”

Crystallization and spectroscopic studies of manganese malonate

“…Metal complexes containing malonate or α-substituted malonate have been taken as models for blood and bone calcium proteins that present the modified amino acid residues, γ-carboxyglutamic acid and β-carboxyaspartic acid. Further lanthanide dicarboxylates are used in metal probe techniques (Zell et al 1985;Hodgson and Aspland 1990;Harrowfield et al 1991). Malonate complexes of manganese show interesting magnetic properties (Ruiz-Perez et al 2000).…”

Self-assembly in lanthanum(III) and calcium(II) complexes of salicylaldimines derived from putrescine

“…They may act as "super calcium" changing the effectiveness enzymes due to the competition with calcium for protein active centers. The application of lanthanide complexes as radiopharmaceuticals and therapeutic agents in the treatment of inflammation, arthritis and atherosclerosis is based on the ability of lanthanide ions to antagonize calcium-dependent processes [1][2][3][4][5][6][7][8][9][10][11]. Among the chemical moieties which have been used as part of potential catalysts and chemotherapeutic agents are biogenic polyamines: putrescine, spermidine, spermine and their synthetic analogs [12][13][14].…”