Metal−Organic Frameworks as Adsorbents for Trapping and Preconcentration of Organic Phosphonates

Metal−organic frameworks (MOFs) have high surface areas and tailorable molecular properties so they have the potential of being selective adsorbents for preconcentrators. In this paper, IRMOF1 is tested as an adsorbent for preconcentration for the first time using dimethyl methylphosphonate (DMMP) a...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2007-02, Vol.79 (4), p.1290-1293
Main Authors: Ni, Zheng, Jerrell, John P, Cadwallader, Keith R, Masel, Richard I
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Analytical chemistry
Chemistry
Exact sciences and technology
Gas Chromatography-Mass Spectrometry - methods
Heating
Molecular biology
Organic chemicals
Organometallic Compounds - chemistry
Organophosphorus Compounds - chemistry
Sensitivity and Specificity
Surface Properties
Temperature
Time Factors
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Summary:Metal−organic frameworks (MOFs) have high surface areas and tailorable molecular properties so they have the potential of being selective adsorbents for preconcentrators. In this paper, IRMOF1 is tested as an adsorbent for preconcentration for the first time using dimethyl methylphosphonate (DMMP) as a test case. We find that DMMP is selectively adsorbed on IRMOF1 and is released upon heating to 250 °C. Concentration gains of more than 5000 are observed for DMMP with a 4-s sampling time. Sorption capacities are 0.95 g of DMMP/g of IRMOF1. By comparison, dodecane shows a preconcentration gain of ∼5 under similar conditions. These results demonstrate that MOFs can be quite useful in selective preconcentrators.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac0613075