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B-O Dynamic Covalent Bond-Enabled Polyphenol-Mediated Macroporous Resin Efficiently Separating Boron Isotopes.

Nanjiong Pang¹, Jiali Cheng¹, Xian Liu¹

¹College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|August 20, 2025

Summary

Efficient separation of boron-10 (¹⁰B) is achieved using a novel polyphenol-mediated macroporous resin. This method enhances ¹⁰B enrichment for applications in nuclear energy and biomedical research.

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Area of Science:

Chemical Engineering
Isotope Separation
Materials Science

Background:

Boron isotope (¹⁰B/¹¹B) separation is difficult due to minimal mass differences.
Existing methods for boron isotope enrichment are often inefficient or costly.

Purpose of the Study:

To develop an efficient method for separating boron-10 (¹⁰B) isotopes.
To investigate the mechanism of polyphenol-mediated boron isotope exchange.

Main Methods:

Utilized a polyphenol-mediated macroporous resin (BWT-MR) for boron isotope separation.
Investigated the chelation of boric acid with phenolic hydroxyl groups.
Analyzed the isotope exchange reaction kinetics and mechanism.

Main Results:

Achieved a high single-stage separation factor of 1.043 for ¹⁰B.
Demonstrated flow-through separation in a fixed bed, achieving 21.64% ¹⁰B abundance.
Identified the formation of tetrahedral sp³ hybridized B-phenolic hydroxyl complexes.

Conclusions:

Polyphenol-mediated macroporous resin offers an efficient route for ¹⁰B enrichment.
The developed method shows promise for industrial-scale isotope separation.
This advancement supports sustainable nuclear energy and biomedical applications.