Magnetic properties of calixarene-supported metal coordination clusters

Catechol-Containing Schiff Bases on Thiacalixarene: Synthesis, Copper (II) Recognition, and Formation of Organic-Inorganic Copper-Based Materials

“…Synthetic macrocyclic compounds, such as calixarenes, thiacalixarenes, resorcinarenes, pillararenes, and others, have excellent complexing properties and are often selective for a certain substrate [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. The introduction of fragments of Schiff bases into the structure of (thia)calixarenes makes it possible to increase both the efficiency and selectivity with respect to metal cations.…”

Synthesis, Structure and Magnetic Properties of Mn2Tb2 Tetranuclear Complex with p‐tert‐Butylthiacalix[4]arene

“…It is known that multidentate ligands are effective for the construction of polynuclear heterometallic compounds . Calix[n]arenes are a suitable synthetic platform for spatial arrangement of binding groups, thus providing the possibility to use them for synthesis of multinuclear metal ion complexes . Modification of the calix[n]arenes by replacement of the methylene bridging groups with the sulfur bridging groups, thus yielding the family of thiacalix[n]arenes, provides additional sites for the metal coordination .…”

“…[11][12][13] Calix [n]arenes are a suitable synthetic platform for spatial arrangement of binding groups, thus providing the possibility to use them for synthesis of multinuclear metal ion complexes. [14,15] Modification of the calix[n]arenes by replacement of the methylene bridging groups with the sulfur bridging groups, thus yielding the family of thiacalix[n]arenes, provides additional sites for the metal coordination. [16] So, for example, p-tert-Butylthiacalix [4]arene (tBuTC4A) is a good "cluster keeper" for designing polynuclear complexes with various classes of metals: alkali, [17] 3d [18][19][20][21] and 4f-metal.…”

Thiacalix[4]arene-Protected Titanium–Oxo Clusters: Influence of Ligand Conformation and Ti–S Coordination on the Visible-Light Photocatalytic Hydrogen Production

“…With the hope of advancing a strategy for (1) synthesizing PTCs with better use of visible-light energy for photocatalysis and (2) gaining a better understanding of the ligand influence on the electronic structure of the resulting PTCs, we turned our attention to p-tert -butylthiacalix­[4]­arene (H 4 TC4A, Scheme ), a multidentate ligand featuring four phenolic units joined by four sulfur atoms with four possible conformations . It has been successfully applied for the assembly of nanosized molecular clusters of Mn, Fe, Co, Ni, Cu, Zn, Cd, lanthanides, and coin metals, wherein the cone conformation of TC4A was usually observed. − We have, along the same line of research, demonstrated the stability of a number of metal clusters supported by TC4A as well as their reusability as photo- and electrocatalysts in aqueous solutions. ,, However, thiacalix[4]­arene-supported titanium nanoclusters remain a rarity. − We were interested in extending our efforts to the preparation of photoactive PTCs. In addition to the synthetic use, we were also interested in the possible ability of the ligand in tuning the electronic structure and therefore photophysical properties of the resulting PTCs.…”