Water-Soluble Titanium Alkoxide Ligand Design
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Solution Overview
Problem
Current metal alkoxide compounds face challenges in controlling structure and stability, particularly for water-soluble, water-stable titanium alkoxide compounds, leading to uncontrolled cluster formation and decomposition, making it difficult to predict the final structure of complex mixed-ligand species.
Innovation Solution
The development of a specific titanium alkoxide compound (OC6H6N)2Ti(OC6H2(CH2N(CH3)2)3-2,4,6)2, utilizing bidentate pyridine carbinoxide and monodentate tri-amino-phenoxide ligands to limit oligomerization and maintain solubility in aqueous media, ensuring stability and solubility through steric constraints and H-bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bulky ligands are introduced to minimize oligomerization behavior, then monomeric species are produced, but water solubility and stability are compromised
Solution Approach 1:
The patent employs a composite ligand system combining pyridine carbinoxide and tri-amino-phenoxide ligands with the titanium center. This composite approach creates a heteroleptic complex where the synergistic interaction between different ligand types provides both steric protection against oligomerization and water solubility through the amino functionality, resolving the contradiction between monomeric stability and water adaptability
Solution Approach 2:
The patent applies local quality by positioning specific functional groups at different locations around the titanium center. The pyridine carbinoxide provides steric bulk and coordination stability at one location, while the tri-amino-phenoxide ligand provides water solubility through its amino groups at another location. This spatial differentiation allows simultaneous achievement of monomeric stability and water solubility
2Ease of manufacture
If simple metal alkoxide structures are used, then synthesis is easier, but uncontrolled cluster formation occurs
Solution Approach 1:
The patent segments the ligand system into distinct functional components: pyridine carbinoxide for steric protection and tri-amino-phenoxide for solubility and additional coordination. This segmentation allows each component to perform its specific function independently, providing structural control while maintaining relatively simple synthesis procedures through modular assembly
3Reliability
If additional ligands are bound to complete coordination sphere, then metal stability is improved, but oligomerization increases
Solution Approach 1:
The patent merges multiple ligand functions into a coordinated system where pyridine carbinoxide and tri-amino-phenoxide ligands work together to satisfy the metal's coordination requirements. The bidentate nature of pyridine carbinoxide and the multidentate tri-amino-phenoxide provide sufficient coordination saturation to prevent oligomerization while maintaining monomeric stability through synergistic ligand-metal interactions
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 compound effectively inhibits hydrolysis and allows for the evaluation of photoexcitation effects on intermolecular bond formation, maintaining monomeric structure and solubility, enabling the observation of specific UV-vis absorption characteristics.
Implementation Method 1
a number of bulky ligands have been introduced to fill coordination sites without depleting the charge of the metal
Implementation Method 2
maintaining solubility in aqueous media, ensuring stability and solubility through steric constraints and H-bonding
Implementation Method 3
allowing for the evaluation of photoexcitation effects on intermolecular bond formation, enabling the observation of specific UV-vis absorption characteristics
Data Source
AI summary
A water soluble, water stable, titanium alkoxide composition represented by the chemical formula (OC6H6N)2Ti(OC6H2(CH2N(CH3)2)3-2,4,6)2 with a theoretical molecular weight of 792.8 and an elemental composition of 63.6% C, 8.1% H, 14.1% N, 8.1% O and 6.0% Ti.