Related Experiment Video
Updated: Jun 18, 2026

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering
Published on: November 25, 2011
Giant Enlarged Circular Metallo-Rings
Yi Liu1, Chaolun Wei1, Xiao Sun1
1Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Energy Science and Technology, Liaocheng University, Liaocheng 252059, P. R. China.
None:
Facilitated by the tert-butyl substituent in a C2-symmetric bis(hydrazone), along with the incorporation of 3d ions, oxalate, carbonate, and sodium ions, a homononanuclear dysprosium ring [Dy9(L1)3(μ3-O)4(μ3-AcO)3(μ2-AcO)6 (μ2-COO)3(DMF)3]·3DMF·1MeOH·6H2O (Dy9) and a heterooctaoctacontanuclear dysprosium-zinc-sodium ring [Dy48Zn24Na16(L2)24(μ6-C2O4)8(μ4-C2O4)18(μ4-CO3)8(μ4-AcO)34(μ4-COO)16(DMF)10(H2O)28]·2Cl·46DMF·38MeCN·82H2O (Dy48Zn24Na16) were synthesized. Compounds Dy9 and Dy48Zn24Na16 exhibit distinct single- and triple-stranded cyclic topologies, in which the bis(hydrazone) ligands L1 and L2 adopt different conformations and exhibit distinct metal coordination modes. While 12 acetate molecules serve as terminal coligands occupying the remaining coordination sites in assembly Dy9, hexacosuple-C2O42-, octuple-CO32- and triacontatetraple-AcO- bridges act as mixed oxoanion templates to form Dy48Zn24Na16 by linking hexanuclear Dy6Zn3Na2(L2)3 building blocks. Sixteen sodium ions act as a tertiary template, filling the internal void of the latter structure. Furthermore, it was observed that the structural modifications largely influence the zero-field magnetic relaxation behavior. This work presents a new approach for constructing C2O42--, CO32-- and AcO-- bridged heterometallic metallosupramolecular rings through the deliberate addition of oxalate, carbonate and acetate for magnetic dynamic studies.
Related Concept Videos
The Contractile Ring
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
The Contractile Ring
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Cirrhosis I: Introduction
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
Plastic Deformation in Circular Shafts

