Metal Complex Ferromagnetic Substance Bond Angle Optimization
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Solution Overview
Problem
The magnetic properties of metal-salen complexes are not solely determined by particle diameter, but are significantly influenced by their stereo structure, requiring a balanced structure to reliably exhibit ferromagnetic properties.
Innovation Solution
A metal complex organic substance with a heterocycle bonded to metal, where metals are bonded via an electron donor, and the metal-electron donor-metal bond angle is between 130° to 160°, optimizing both stability and magnetization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the crystal structure of metal complex organic compound is stabilized, then structural stability is improved, but unpaired electron density decreases due to superexchange interaction and ferromagnetic property deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the metal-electron donor-metal bond angle to be within 130° to 160°. This specific angular parameter range prevents excessive superexchange interaction that would occur at 180°, thereby maintaining unpaired electron density and ferromagnetic properties while still achieving structural stability through the optimized geometric configuration.
2Reliability
If the metal-electron donor-metal bond angle is closer to 90°, then unpaired electron density increases and ferromagnetic property is enhanced, but molecular structure distortion increases and crystal structure stability decreases
Solution Approach 1:
The patent resolves this contradiction by identifying and optimizing the bond angle parameter to fall within the 130° to 160° range. This optimized parameter value balances two competing requirements: it maintains sufficient unpaired electron density for ferromagnetic properties while avoiding excessive molecular distortion that would compromise crystal structure stability. The specific angular range represents an optimal compromise point between these two opposing demands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This structure ensures high structural stability and unpaired electron density, enabling the metal complex compounds to exhibit stable ferromagnetic properties within a specific particle diameter range, enhancing magnetic strength and reducing side effects.
Implementation Method 1
electron spins of unpaired electron pairs are oriented either up or down relative to their basic skeleton, so that the metal-salen complex itself can exhibit the ferromagnetic property without any help of a magnetic carrier
Implementation Method 2
the metal-salen complex is magnetically guided by an external magnetic field. So, when the metal-salen complex is applied to a human or an animal, it is guided by the magnetic field outside the body to a region, to which the magnetic field is locally applied, and retained in that region
Implementation Method 3
The metals of the metal complex organic molecules can be bonded together via an electron donor (such as an oxygen atom) having an electron pair to be donated to the metals
Implementation Method 4
When the crystal structure of the metal complex organic compound is about to be stabilized, unpaired electron density of the metal complex compound decreases due to a superexchange interaction and the magnetic property of the crystal decreases
Data Source
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AI summary
[Object] The structure of a ferromagnetic metal complex is clarified and a magnetic substance capable of reliably exhibiting a ferromagnetic property by having that structure is provided. [Solution] The present invention is a magnetic substance containing a metal complex compound composed of a plurality of metal complex molecules in which a heterocycle is bonded to metal, wherein the metal of the metal complex molecule is bonded to the metal of another metal complex molecule via an electron donor and a metal - electron donor - metal bond angle is from 130° to 160°.