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Title: Elucidating CO 2 Chemisorption in Diamine-Appended Metal–Organic Frameworks

Abstract

The widespread deployment of carbon capture and sequestration as a climate change mitigation strategy could be facilitated by the development of more energy-efficient adsorbents. Diamine-appended metal-organic frameworks of the type diamine-M 2(dobpdc) (M = Mg, Mn, Fe, Co, Ni, Zn; dobpdc 4- = 4,4'-dioxidobiphenyl-3,3'-dicarboxylate) have shown promise for carbon-capture applications, although questions remain regarding the molecular mechanisms of CO 2 uptake in these materials. Here we leverage the crystallinity and tunability of this class of frameworks to perform a comprehensive study of CO 2 chemisorption. Using multinuclear nuclear magnetic resonance (NMR) spectroscopy experiments and van-der-Waals-corrected density functional theory (DFT) calculations for 13 diamine-M 2(dobpdc) variants, we demonstrate that the canonical CO 2 chemisorption products, ammonium carbamate chains and carbamic acid pairs, can be readily distinguished and that ammonium carbamate chain formation dominates for diamine-Mg 2(dobpdc) materials. In addition, we elucidate a new chemisorption mechanism in the material dmpn-Mg 2 (dobpdc) (dmpn = 2,2-dimethyl-1,3-diaminopropane), which involves the formation of a 1:1 mixture of ammonium carbamate and carbamic acid and accounts for the unusual adsorption properties of this material. Finally, we show that the presence of water plays an important role in directing the mechanisms for CO 2 uptake in diamine-M 2more » (dobpdc) materials. Overall, our combined NMR and DFT approach enables a thorough depiction and understanding of CO 2 adsorption within diamine-M 2(dobpdc) compounds, which may aid similar studies in other amine-functionalized adsorbents in the future.« less

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [1];  [2];  [1];  [2];  [1];  [1];  [4]; ORCiD logo [2]; ORCiD logo [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States). Kavli Energy Nanosciences Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1542346
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 140; Journal Issue: 51; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Forse, Alexander C., Milner, Phillip J., Lee, Jung-Hoon, Redfearn, Halle N., Oktawiec, Julia, Siegelman, Rebecca L., Martell, Jeffrey D., Dinakar, Bhavish, Porter-Zasada, Leo B., Gonzalez, Miguel I., Neaton, Jeffrey B., Long, Jeffrey R., and Reimer, Jeffrey A. Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks. United States: N. p., 2018. Web. doi:10.1021/jacs.8b10203.
Forse, Alexander C., Milner, Phillip J., Lee, Jung-Hoon, Redfearn, Halle N., Oktawiec, Julia, Siegelman, Rebecca L., Martell, Jeffrey D., Dinakar, Bhavish, Porter-Zasada, Leo B., Gonzalez, Miguel I., Neaton, Jeffrey B., Long, Jeffrey R., & Reimer, Jeffrey A. Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks. United States. doi:10.1021/jacs.8b10203.
Forse, Alexander C., Milner, Phillip J., Lee, Jung-Hoon, Redfearn, Halle N., Oktawiec, Julia, Siegelman, Rebecca L., Martell, Jeffrey D., Dinakar, Bhavish, Porter-Zasada, Leo B., Gonzalez, Miguel I., Neaton, Jeffrey B., Long, Jeffrey R., and Reimer, Jeffrey A. Sun . "Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks". United States. doi:10.1021/jacs.8b10203. https://www.osti.gov/servlets/purl/1542346.
@article{osti_1542346,
title = {Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks},
author = {Forse, Alexander C. and Milner, Phillip J. and Lee, Jung-Hoon and Redfearn, Halle N. and Oktawiec, Julia and Siegelman, Rebecca L. and Martell, Jeffrey D. and Dinakar, Bhavish and Porter-Zasada, Leo B. and Gonzalez, Miguel I. and Neaton, Jeffrey B. and Long, Jeffrey R. and Reimer, Jeffrey A.},
abstractNote = {The widespread deployment of carbon capture and sequestration as a climate change mitigation strategy could be facilitated by the development of more energy-efficient adsorbents. Diamine-appended metal-organic frameworks of the type diamine-M2(dobpdc) (M = Mg, Mn, Fe, Co, Ni, Zn; dobpdc4- = 4,4'-dioxidobiphenyl-3,3'-dicarboxylate) have shown promise for carbon-capture applications, although questions remain regarding the molecular mechanisms of CO2 uptake in these materials. Here we leverage the crystallinity and tunability of this class of frameworks to perform a comprehensive study of CO2 chemisorption. Using multinuclear nuclear magnetic resonance (NMR) spectroscopy experiments and van-der-Waals-corrected density functional theory (DFT) calculations for 13 diamine-M2(dobpdc) variants, we demonstrate that the canonical CO2 chemisorption products, ammonium carbamate chains and carbamic acid pairs, can be readily distinguished and that ammonium carbamate chain formation dominates for diamine-Mg2(dobpdc) materials. In addition, we elucidate a new chemisorption mechanism in the material dmpn-Mg2 (dobpdc) (dmpn = 2,2-dimethyl-1,3-diaminopropane), which involves the formation of a 1:1 mixture of ammonium carbamate and carbamic acid and accounts for the unusual adsorption properties of this material. Finally, we show that the presence of water plays an important role in directing the mechanisms for CO2 uptake in diamine-M2 (dobpdc) materials. Overall, our combined NMR and DFT approach enables a thorough depiction and understanding of CO2 adsorption within diamine-M2(dobpdc) compounds, which may aid similar studies in other amine-functionalized adsorbents in the future.},
doi = {10.1021/jacs.8b10203},
journal = {Journal of the American Chemical Society},
number = 51,
volume = 140,
place = {United States},
year = {2018},
month = {12}
}

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