Related Experiment Video
Updated: Sep 24, 2025
07:14
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
3.2K
Chiral {Ni6PW9} Cluster-Organic Framework: Synthesis, Structure, and Properties
Zhen-Wen Wang1, Qing Zhao1, Chong-An Chen1
1MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China.
Inorganic Chemistry
|May 5, 2022
Summary
A novel chiral polyoxometalate cluster-organic framework (POMCOF) demonstrates efficient, eco-friendly hydrogen production via photocatalysis. This stable material also shows potential for nonlinear optical applications.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Catalysis
Background:
- Development of stable, functional materials for energy and optical applications is crucial.
- Polyoxometalate cluster-organic frameworks (POMCOFs) offer tunable properties but require efficient synthesis strategies.
Purpose of the Study:
- To synthesize a novel chiral three-dimensional polyoxometalate cluster-organic framework (POMCOF).
- To evaluate its stability, photocatalytic activity for hydrogen evolution, and nonlinear optical properties.
Main Methods:
- Hydrothermal synthesis of the POMCOF, H3[(btc)Ni6(μ3-OH)3(H2O)5(B-α-PW9O34)]·17H2O (1).
- Assessment of stability across a wide pH range and in mixed solvent systems.
- UV-vis reflectance spectroscopy, Mott-Schottky analysis, and visible-light-driven H2 evolution experiments.
- Nonlinear optical (NLO) measurements, including second-harmonic generation (SHG).
Main Results:
- The synthesized POMCOF (1) exhibits high stability in various solutions (pH 2-12) and mixed solvents.
- Photocatalytic studies show an efficient H2 evolution rate of 1058.24 μmol h-1g-1.
- NLO measurements indicate a significant SHG response (1.4 times that of KDP), highlighting its potential as an NLO material.
Conclusions:
- A stable, chiral POMCOF was successfully synthesized without chiral precursors.
- The material is an effective, recyclable, and eco-friendly photocatalyst for hydrogen production.
- The POMCOF demonstrates promising nonlinear optical properties, suggesting dual functionality.
Related Concept Videos
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
6.0K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
6.0K
02:05Prochirality
4.0K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
4.0K
02:25Chirality
25.9K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.9K
02:06Newman Projections
18.2K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
18.2K
01:18Structure of Benzene: Molecular Orbital Model
10.2K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
10.2K
02:52VSEPR Theory and the Basic Shapes
71.4K
Overview of VSEPR Theory
71.4K