Title: Evaluation of different getter substrates using two-dimensional gas chromatography with time of flight mass spectrometry

Abstract

We report while understanding hydrogen uptake by organic based getters such as 1,4-bis(phenylethynyl)benzene (DEB) combined with a palladium(0)bis(dibenzylideneacetone) (Pd(dba)₂) catalyst is essential, another crucial element to understand is the decomposition of the DEB, Pd(dba)₂, and/or substrate material. The breakdown of these materials may create unwanted volatiles, which may interact with and lead to deterioration of sensitive materials. Moreover, it is critical to understand if different substrates cause the getter and/or catalyst to degrade in different manners. Utilizing comprehensive two-dimensional gas chromatography (GC×GC) with time-of-flight mass spectrometry (TOFMS), the presence of volatiles located in the headspace of various DEB/Pd(dba)₂ getter substrates is examined. These samples include a getter infused silicone foam, a hydrogenated getter infused silicone foam, an activated carbon getter pellet, and a hydrogenated activated carbon getter pellet. Application of Fisher ratio (F-ratio) analyses lead to the identification of several compounds that are generated or consumed through the hydrogenation process. These include benzene derivatives such as bibenzyl, benzaldehyde, and vinyl benzoate in the activated carbon pellets and 1,5-diphenyl-3-pentanone, toluene, styrene, and 1–1'(2-pentene 1,5-diyl)bis benzene in the silicone foams, and alkane/alkene derivatives such undecane, 4-tridecene, and decane in the activated carbon pellets and 2,6-dimethyl undecane in the silicone foams. Further comparisonmore » of the different hydrogenated getter substrates (e.g. activated carbon pellet and silicone foam) indicates that the different substrates alter the decomposition products created from the degradation of the DEB and Pd(dba)₂.« less

Authors:

Davis, Jacob T. ^[1]; Beaux, Miles F.  ^[1];

• Search DOE PAGES for author "Beaux, Miles F."
• Search DOE PAGES for ORCID "0000-0003-2192-626X"

Freye, Chris E.  ^[1]

• Search DOE PAGES for author "Freye, Chris E."
• Search DOE PAGES for ORCID "0000-0003-2634-1324"

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+ Show Author Affiliations

1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Publication Date:

Wed Dec 28 00:00:00 EST 2022

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1908476

Alternate Identifier(s):

OSTI ID: 1960908

Report Number(s):

LA-UR-21-27799
Journal ID: ISSN 0021-9673

Grant/Contract Number:  

89233218CNA000001

Resource Type:

Accepted Manuscript

Journal Name:

Journal of Chromatography

Additional Journal Information:

Journal Volume: 1689; Journal ID: ISSN 0021-9673

Publisher:

Elsevier

Country of Publication:

United States

Language:

English

Subject:

47 OTHER INSTRUMENTATION; GC x GC; getter; chemometrics