Oxidized Metal Complex Preparation by pH Adjustment
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Solution Overview
Problem
Existing methods for producing oxidized metal complexes, particularly those in high oxidation states, face challenges such as instability in acidic media, degradation in air, and low yields due to the need for highly basic environments, limiting their industrial applications, especially for metals like silver with antimicrobial properties.
Innovation Solution
A method involving the combination of a first solution with a pH between 0 to 7 containing a highly oxidized metal and a second solution with a pH between 7 to 13 or greater containing ligands, followed by adjusting the pH of the resulting mixture to form oxidized metal complexes like silver periodate complexes, enhancing stability and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods use highly basic environments to form oxidized metal complexes, then the complexes can be produced, but their stability deteriorates and yields are limited
Solution Approach 1:
The patent changes the pH parameter from highly basic (prior art) to mildly basic or neutral conditions. This parameter change simultaneously improves stability by preventing degradation and maintains acceptable yields, resolving the contradiction between reliability and productivity.
Solution Approach 2:
Instead of following the conventional approach of using highly basic environments, the patent inverts the approach by using mildly basic or neutral conditions. This reverse strategy achieves both stability and productivity that the conventional method could not achieve simultaneously.
2Ease of manufacture
If oxidized metal complexes are produced in acidic media, then production is simplified, but accelerated degradation occurs
Solution Approach 1:
The patent adjusts the pH parameter from acidic to mildly basic or neutral conditions. This change prevents accelerated degradation while maintaining relatively simple production procedures, resolving the contradiction between ease of manufacture and reliability.
3Reliability
If oxidized metal complexes are handled under argon to prevent degradation, then stability is improved, but process complexity increases
Solution Approach 1:
The patent makes the oxidized metal complexes self-stabilizing by producing them under mildly basic or neutral conditions where they are inherently stable. This eliminates the need for complex argon handling systems, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
By changing the pH parameter to mildly basic or neutral conditions, the patent creates conditions where the complexes are stable without requiring inert atmosphere protection, thereby simplifying the overall process equipment and handling requirements.
4Ease of manufacture
If periodate is added in highly basic environment to form oxidized metal complexes, then complex formation is achieved, but yields are limited and stability is reduced
Solution Approach 1:
The patent changes the pH parameter from highly basic to mildly basic or neutral conditions during periodate addition. This parameter change improves yields significantly while maintaining the feasibility of complex formation, resolving the contradiction between ease of manufacture and productivity.
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
The method achieves yields of 60% to 85% for oxidized metal complexes, improving their stability and suitability for industrial applications, including antimicrobial uses.
Implementation Method 1
An oxidized metal complex refers to a coordination complex consisting of a metal atom surrounded by bound molecules, atoms, or ion, with the metal having been subjected to oxidation or loss of electrons during a reaction
Data Source
AI summary
Oxidized metal complexes are formed using methods which adjust the pH of solutions to obtain oxidized metal complexes having particular physicochemical properties. A method for preparing an oxidized metal complex includes providing a first solution comprising a highly oxidized metal and having a pH between 0 to 7; providing a second solution comprising one or more ligands or a ligand precursor and having a pH between 7 to 13 or greater; and combining the first solution and the second solution to form a third solution comprising the first oxidized metal complex. A method for preparing an oxidized metal complex includes providing a species solution comprising a first oxidized metal complex and having a pH of at least pH 11; and adjusting the pH of the species solution to form a second oxidized metal complex. Compositions and methods for preparing and using same are provided.