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Title: Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration

Abstract

The potential consequences of nuclear events and the complexity of nuclear waste management motivate the development of selective solid-phase sorbents to provide enhanced protection. Herein, we show that two dimensional covalent organic frameworks (COFs) with unique structures possess all the traits to be well-suited as a platform for the deployment of highly efficient sorbents such that they exhibit remarkable performance, as demonstrated by uranium capture. The chelating groups laced on the open one dimensional channels exhibit exceptional accessibility, allowing significantly higher utilization efficiency. In addition, the two dimensional extended polygons packed closely in an eclipsed fashion bring chelating groups in adjacent layers parallel to each other, which may facilitate their cooperation, thereby leading to high affinity towards specific ions. As a result, the amidoxime functionalized COFs far outperform their corresponding amorphous analogues in terms of adsorption capacities, kinetics, and affinities

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [1]; ORCiD logo [2];  [1]
  1. University of South Florida
  2. BATTELLE (PACIFIC NW LAB)
  3. Oak Ridge National Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1514262
Report Number(s):
PNNL-SA-132450
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 20
Country of Publication:
United States
Language:
English

Citation Formats

Sun, Qi, Aguila, Briana A., Earl, Lyndsey D., Abney, Carter W., Wojtas, Lukasz, Thallapally, Praveen K., and Ma, Shengqian. Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration. United States: N. p., 2018. Web. doi:10.1002/adma.201705479.
Sun, Qi, Aguila, Briana A., Earl, Lyndsey D., Abney, Carter W., Wojtas, Lukasz, Thallapally, Praveen K., & Ma, Shengqian. Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration. United States. doi:10.1002/adma.201705479.
Sun, Qi, Aguila, Briana A., Earl, Lyndsey D., Abney, Carter W., Wojtas, Lukasz, Thallapally, Praveen K., and Ma, Shengqian. Thu . "Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration". United States. doi:10.1002/adma.201705479.
@article{osti_1514262,
title = {Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration},
author = {Sun, Qi and Aguila, Briana A. and Earl, Lyndsey D. and Abney, Carter W. and Wojtas, Lukasz and Thallapally, Praveen K. and Ma, Shengqian},
abstractNote = {The potential consequences of nuclear events and the complexity of nuclear waste management motivate the development of selective solid-phase sorbents to provide enhanced protection. Herein, we show that two dimensional covalent organic frameworks (COFs) with unique structures possess all the traits to be well-suited as a platform for the deployment of highly efficient sorbents such that they exhibit remarkable performance, as demonstrated by uranium capture. The chelating groups laced on the open one dimensional channels exhibit exceptional accessibility, allowing significantly higher utilization efficiency. In addition, the two dimensional extended polygons packed closely in an eclipsed fashion bring chelating groups in adjacent layers parallel to each other, which may facilitate their cooperation, thereby leading to high affinity towards specific ions. As a result, the amidoxime functionalized COFs far outperform their corresponding amorphous analogues in terms of adsorption capacities, kinetics, and affinities},
doi = {10.1002/adma.201705479},
journal = {Advanced Materials},
number = 20,
volume = 30,
place = {United States},
year = {2018},
month = {5}
}