Related Experiment Video
Updated: Mar 19, 2026
06:40
Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
12.1K
Stimuli-responsive metal-directed self-assembly of a ring-in-ring complex
Cristina Alvariño1, Carlos Platas-Iglesias, Víctor Blanco
1Departamento de Química Fundamental and Centro de Investigacións Científicas Avanzadas (CICA), Facultad de Ciencias, Universidade da Coruña, E-15071 A Coruña, Spain. carlos.peinador@udc.es marcos.garcia1@udc.es.
Dalton Transactions (Cambridge, England : 2003)
|June 16, 2016
Summary
Controlling concentration, temperature, and solvent polarity influences the self-assembly of palladium(II) complexes with a pyridyl ligand. This creates a dynamic system forming metallacycles and ring-in-ring structures.
Area of Science:
- Coordination chemistry
- Supramolecular chemistry
- Materials science
Background:
- Metal-directed self-assembly is a powerful tool for constructing complex molecular architectures.
- The precise control over speciation in these systems is crucial for predictable outcomes.
Purpose of the Study:
- To investigate the influence of external parameters on the self-assembly of palladium(II) complexes with a ditopic pyridyl ligand.
- To achieve controllable dynamic systems through manipulation of concentration, temperature, and solvent polarity.
Main Methods:
- Synthesis of a ditopic pyridyl ligand (L).
- Complexation of the ligand with cis-protected palladium(II) metal centers.
- Systematic variation of concentration, temperature, and solvent polarity.
Main Results:
- Demonstrated that concentration, temperature, and solvent polarity are key factors controlling speciation.
- Identified the formation of a [Pd2L2](6+) metallacycle under specific conditions.
- Observed the self-assembly into a [Pd4L4](12+) ring-in-ring complex.
Conclusions:
- External parameters offer precise control over the self-assembly process.
- The system exhibits dynamic behavior, allowing for the formation of distinct supramolecular structures.
- This work provides a foundation for designing responsive and tunable metallosupramolecular systems.
Related Concept Videos
02:51Metal-Ligand Bonds
25.3K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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...
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...
25.3K
02:42Valence Bond Theory
11.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.5K
01:30Assembly of Signaling Complexes
7.0K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
7.0K
01:19Complexation Equilibria: The Chelate Effect
1.5K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.5K
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
935
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
935
02:15The Contractile Ring
7.5K
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
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...
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...
7.5K