Related Experiment Video
Updated: Jan 27, 2026
12:05
Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
Published on: March 6, 2013
14.6K
The Studies on Structure and Stability of CaBn Clusters
Peilin Han1, Fengli Chai2, Bolin Qiao3
1School of Chemistry and Chemical Engineering, Xuchang University of China, No. 88 of Bayi Road, Xuchang 461000, China. 12009047@xcu.edu.cn.
Molecules (Basel, Switzerland)
|March 16, 2019
Summary
This study reveals that calcium-boron (CaBn) clusters exhibit non-planar structures for optimal stability. Specific CaBn formations, like CaB₄, CaB₆, and CaB₈, demonstrate enhanced stability and distinct electron binding properties.
Area of Science:
- Materials Science
- Computational Chemistry
- Solid-State Physics
Background:
- Calcium-boron systems possess desirable properties like hardness and chemical stability.
- Understanding the structural and electronic properties of CaBn clusters is crucial for materials development.
Purpose of the Study:
- To investigate the structures and relative stability of calcium-boron (CaBn) clusters.
- To analyze the electronic properties, including electron removal and acquisition tendencies.
Main Methods:
- Calculated structural properties and relative stability of CaBn clusters.
- Computed key energetic parameters: average binding energy (Eb), fragmentation energy (EF), second-order energy difference (Δ₂E), adiabatic detachment energy (ADE), and adiabatic electron affinity (AEA).
Main Results:
- Stable CaBn cluster structures are non-planar, with boron atoms forming rings and calcium atoms on the periphery.
- Fragmentation energy (EF) and second-order energy difference (Δ₂E) showed odd-even alternations, indicating higher stability for CaB₄, CaB₆, and CaB₈.
- CaBn clusters with even 'n' have higher adiabatic detachment energies (ADE), making electron removal difficult, while CaB₃ and CaB₇ exhibit larger adiabatic electron affinities (AEA), facilitating electron gain.
Conclusions:
- The study provides insights into the stability and electronic behavior of CaBn clusters.
- Findings offer guidance for understanding alkaline earth metal boride formation and synthesis of CaBn clusters.
Related Concept Videos
01:14Stability of structures
511
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
511
01:53RNA Stability
35.7K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.7K
03:18Nuclear Stability
23.2K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
To hold positively charged protons together...
23.2K
01:28Stability
414
The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
414
02:10Additional Subnuclear Structures
5.4K
The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals.
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
5.4K
01:20Cluster Sampling Method
14.4K
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
14.4K