Fluorine-Containing Surfactant Compounds Without CF3 or CF2 Groups
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Solution Overview
Problem
Existing fluorine-containing compounds in the literature contain either CF3- or —CF2—(difluoromethylene) groups, lacking diversity in molecular structure.
Innovation Solution
Development of fluorine-containing compounds represented by the general formula R1—R2—X, where R1 is —CH3, —CH2F, —CHF2, —CH2I, or an anionic group; R2 is an alkylene group with optional epoxy or cycloalkylene units; and X is —OH, —CH(R21)OH, —I, or an anionic group, without CF3- or —CF2—, with a total carbon count of 2 to 50.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing fluorine-containing compounds (containing CF3 or CF2 groups) are used, then fluorine-containing compounds can be synthesized, but molecular structure diversity is limited
Solution Approach 1:
The patent segments the fluorine-containing compound into distinct structural modules: a fluorinated terminal group (R1), a flexible alkylene chain (R2), and a functional group (X). This modular segmentation allows independent variation of each component to achieve diverse molecular structures without increasing overall synthesis complexity. The alkylene chain can be segmented into different lengths and configurations (linear, branched, cyclic) to create variety.
Solution Approach 2:
The patent applies local quality by concentrating fluorine atoms in specific locations (terminal groups R1 and/or within the alkylene chain R2) rather than uniformly distributing them. This allows the molecular structure to have different local properties: fluorinated regions provide specific chemical properties while non-fluorinated regions provide flexibility and versatility. The functional group X can be locally varied to achieve different chemical functionalities.
2Reliability
If compounds without CF3 or CF2 groups are developed, then novel properties can be achieved, but synthesis complexity increases
Solution Approach 1:
The patent extracts and eliminates the CF3 and CF2 groups from the fluorine-containing compound structure, retaining only necessary fluorine atoms in terminal or chain positions. This extraction simplifies the molecular architecture and enables access to novel properties without the synthetic complexity associated with introducing and positioning CF3/CF2 groups. The remaining fluorine atoms can be incorporated through straightforward fluorination reactions.
Solution Approach 2:
The patent changes the key structural parameters of fluorine-containing compounds by varying the position, number, and configuration of fluorine atoms rather than relying on fixed CF3/CF2 motifs. The fluorine atoms can be placed at terminal positions (R1), within the alkylene chain (R2), or both. This parameter variation enables novel properties while maintaining synthesis accessibility through standard fluorination methods.
3Stability of the object's composition
If perfluoroalkyl or perfluoroalkylene groups are used, then compound stability is improved, but surfactant interface activity is reduced
Solution Approach 1:
The patent applies partial fluorination rather than complete perfluorination. Only specific portions of the molecule contain fluorine atoms (terminal groups R1 and/or alkylene chain R2), while other portions remain non-fluorinated. This partial action provides sufficient stability enhancement from fluorine while preserving the flexibility and interface activity needed for surfactant function. The non-fluorinated regions can interact more effectively with aqueous environments.
Solution Approach 2:
The patent creates a composite molecular structure combining fluorinated and non-fluorinated regions within a single molecule. The fluorinated portions (R1, R2) provide stability and hydrophobicity, while non-fluorinated portions provide flexibility and aqueous interaction capability. This composite approach within the molecular structure enables both stability and high interface activity simultaneously, making effective surfactants.
Data Source
AI summary
A compound represented by general formula: R1—R2—X, wherein R1 is —CH3, —CH2F, —CHF2, —CH2I, —CHFI, or an anionic group, R2 is an alkylene group consisting of unit represented by —CFH—, or an alkylene group consisting of unit represented by —CFH— and a unit represented by —CH2—, provided that these alkylene groups optionally contain epoxy group, —CH(OH)—, —CHI—, or a divalent cycloalkylene group, X is —OH, —CH(R21)OH (wherein R21 is H, a non-fluorinated alkyl group, or a fluorinated alkyl group), —I, —CFHI, —CH2I, an anionic group, or —COOR22 (wherein R22 is a non-fluorinated alkyl group having 1 to 8 carbon atoms, and the total number of carbon atoms of R1, R2, and X is 2 to 50).