A graphite-phase carbon nitride composite material covalently modified by a polymethyl methacrylate polymer containing a porphyrin group at the end group and a preparation method thereof

By covalently bonding porphyrin polymers with g-C3N4, the prepared composite material solves the application difficulties of g-C3N4 in nonlinear optical devices, achieves good dispersibility and nonlinear optical properties, and is suitable for the practical application of nonlinear optical devices.

CN119060358BActive Publication Date: 2025-09-19JILIN JIANZHU UNIVERSITY
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Patent Information

Application Number
CN202411328647.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-24
Publication Date
2025-09-19
Estimated Expiration
2044-09-24

AI Technical Summary

Technical Problem

The application of graphitic carbon nitride (g-C3N4) in nonlinear optical devices is limited by problems such as high photogenerated electron-hole pair recombination rate, narrow visible light absorption edge and poor dispersibility in organic solvents. Existing modification research has not yet effectively solved its practical application difficulties.

Method used

By covalently bonding porphyrin polymer with g-C3N4, a graphite phase carbon nitride composite material covalently modified with polymethyl methacrylate polymer containing porphyrin groups at the end groups was prepared. The polymer properties of porphyrin were utilized to improve its solubility and aggregation in the medium, thereby enhancing the nonlinear optical properties.

Benefits of technology

The prepared composite material has good dispersibility in solid organic reagents, exhibits good anti-saturation absorption characteristics and nonlinear optical properties, and is suitable for practical applications in nonlinear optical devices.

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Abstract

A graphite-phase carbon nitride composite material covalently modified with a polymethyl methacrylate polymer containing a porphyrin group at its end, and a preparation method thereof, belong to the technical field of nonlinear optical materials. The composite material is characterized by being formed by covalently modifying graphite-phase carbon nitride with polymethyl methacrylate containing a porphyrin group at its end. The preparation method comprises first preparing polymethyl methacrylate containing a porphyrin group at its end by atom transfer radical polymerization, and then covalently linking the polymethyl methacrylate with a graphite-phase carbon nitride covalently modified with benzyl alcohol to prepare a graphite-phase carbon nitride composite material covalently modified with polymethyl methacrylate containing a porphyrin group at its end. The composite material is a nonlinear optical material. This method can produce a composite material with excellent nonlinear optical properties, and the nonlinear optical properties of the composite material can be controlled by varying the polymer of the porphyrin polymer.
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