Sulfonyl Fluorene Allyl Compounds for Oxidation-Resistant Hydrosilation
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Solution Overview
Problem
Existing fluorene compounds with allyl groups are susceptible to oxidation and coloration upon light irradiation, limiting their use in synthesizing fluorene skeleton-containing organosilicon compounds with desirable properties.
Innovation Solution
A fluorene compound with sulfonic acid ester structures and allyl groups is synthesized, which is then reacted with an organosilicon compound containing a Si—H group through hydrosilation, introducing a strongly electron-attractive sulfonyl group to enhance oxidation resistance and light resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fluorene compounds with allyl groups are used to synthesize organosilicon compounds, then polymerization can proceed easily through hydrosilation reaction, but the resulting compounds are susceptible to oxidation and coloration upon light irradiation
Solution Approach 1:
The patent changes the chemical structure parameter by introducing a sulfonyl group (strongly electron-attractive substituent) into the fluorene compound. This structural modification alters the electronic properties of the molecule, providing high oxidation resistance while preserving the allyl groups necessary for hydrosilation polymerization. The sulfonyl group acts as a protective electronic feature that prevents oxidation without interfering with the polymerization mechanism.
2Productivity
If fluorene compounds with allyl groups are used, then polymers can be synthesized through hydrosilation reaction, but the compounds colored upon light irradiation
Solution Approach 1:
The patent modifies the chemical structure by introducing the sulfonyl group, which changes the electronic and optical properties of the fluorene compound. This structural parameter change provides resistance against light-induced coloration while maintaining the polymerization efficiency through the preserved allyl groups.
3Ease of manufacture
If phenolic hydroxy group or glycidyl form of phenolic hydroxy group is used in fluorene compounds, then organosilicon compounds can be synthesized by hydrosilation, but the compounds are undesirably susceptible to oxidation
Solution Approach 1:
The patent changes the functional group parameter by replacing phenolic hydroxy groups or glycidyl forms with sulfonic acid ester structures containing the strongly electron-attractive sulfonyl group. This substitution maintains the ability to undergo hydrosilation reaction while providing high oxidation resistance, thereby resolving the contradiction between synthesis feasibility and oxidation susceptibility.
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 resulting fluorene skeleton-containing organosilicon compounds exhibit higher oxidation resistance and excellent light resistance, making them suitable for synthesizing high-quality polymers and films.
Implementation Method 1
comprising the step of effecting hydrosilation reaction of the fluorene compound of any one of 1 to 3 with an organosilicon compound containing a Si—H group in the presence of a catalyst
Data Source
AI summary
Provided is a fluorene compound having a sulfonic acid ester structure and an allyl group, the compound being represented by formula (1).(In the formula, R1 each independently are a hydrogen atom or a methyl group. R2 each independently are a C1-20 hydrocarbyl group, some or all of the hydrogen atoms of which may be substituted by a halogen atom, a nitro group, or a cyano group, and an ester bond or an ether bond may be present between the carbon-carbon bonds thereof.)