Related Experiment Video
Updated: Jun 17, 2026
07:20
Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
Structural mapping and framework interconversions in 1D, 2D, and 3D divalent metal R,S-hydroxyphosphonoacetate
Rosario M P Colodrero1, Pascual Olivera-Pastor, Aurelio Cabeza
1Departamento de Química Inorgánica, Universidad de Málaga, Spain.
Inorganic Chemistry
|December 18, 2009
Summary
This study synthesized novel crystalline metal-hydroxyphosphonoacetic acid (M-HPAA) hybrids. Different reaction conditions produced diverse structures, including 1D chains, 2D layers, and 3D networks, offering new materials for various applications.
Area of Science:
- Materials Chemistry
- Inorganic Chemistry
- Crystallography
Background:
- Hydroxyphosphonoacetic acid (HPAA) is a versatile ligand capable of forming coordination compounds.
- Divalent metal cations (Mg2+, Co2+, Ni2+, Zn2+) are common in coordination chemistry and materials science.
- Controlling crystal structure through synthesis conditions is crucial for developing new materials.
Purpose of the Study:
- To synthesize and characterize novel crystalline hydrated M-HPAA hybrids.
- To investigate the influence of reaction conditions (temperature, pH, cation ratios) on the resulting hybrid structures.
- To explore the dehydration and rehydration behavior of these M-HPAA compounds.
Main Methods:
- Crystallization of divalent metal cations with R,S-hydroxyphosphonoacetic acid in aqueous solutions.
- Hydrothermal synthesis to obtain layered and network structures.
- Thermal analysis (TGA/DSC) to study dehydration/rehydration processes.
- X-ray diffraction to determine crystal structures of eight new M(II)-HPAA hybrids.
Main Results:
- Formation of one-dimensional (1D) chain compounds ([M{HO(3)PCH(OH)CO(2)}(H(2)O)(2)].2H(2)O) at room temperature.
- Synthesis of two-dimensional (2D) layered frameworks and three-dimensional (3D) networks under hydrothermal conditions or by adjusting pH and cation ratios.
- Isolation of fully dehydrated 3D phases ([M{HO3PCH(OH)CO(2)}]) at elevated temperatures.
- Incorporation of alkali metal cations (Na+, K+) into 3D networks for charge compensation.
Conclusions:
- The synthesis of M-HPAA hybrids is highly dependent on reaction parameters, allowing for control over dimensionality (1D, 2D, 3D).
- Hydrothermal conditions and specific cation ratios are key to forming layered and network structures.
- The synthesized M-HPAA hybrids exhibit interesting thermal behavior related to hydration states, suggesting potential applications in areas sensitive to moisture.
Related Concept Videos
02:42Valence Bond Theory
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...
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
02:58Crystal Field Theory - Octahedral Complexes
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:00Molecular Models
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
03:35Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
02:16Resonance and Hybrid Structures
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.