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Lourantos E, Ramirez OM, Giannakopulos AE, Beran KA, Derrick PJ, Bashir S. The use of a silica-based heat sink to “uncouple” the matrix-assisted laser desorption/ionization (MALDI) mechanism. CAN J CHEM 2011. [DOI: 10.1139/v10-154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The relationships between ion yield(s) as a function of desorption alone and (or) ionization was investigated using two model systems. In the first model system, a carbohydrate (2,3,6-tri-O-methyl-β-cyclodextrin, TMBCD), which could be directly laser desorbed, was analyzed with and without a silicon-based heat sink compound (HSC). The HSC allowed heat to pass through but obstructed the flow of charge. In the second model system, a peptide (substance P), which ccould not be laser desorbed, was analyzed under similar conditions. The ion yield of TMBCD under either system of heat conductivity was similar, whereas the ion yield of the peptide with the heat sink was negligible. Compounds that are predominately cationized either in the gas phase or preformed in solution give an ion yield that is not dependent upon the surface conditions, whereas compounds that are not ordinarily cationized are affected by the emission of electrons from the metal surface.
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Affiliation(s)
- E. Lourantos
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
| | - O. M. Ramirez
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
| | - A. E. Giannakopulos
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
| | - K. A. Beran
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
| | - Peter J. Derrick
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
| | - S. Bashir
- Institute of Mass Spectrometry, University of Warwick, Coventry CV4 7AL, UK
- Department of Physical Sciences, The University of Texas of the Permian Basin, 4901 E. University Blvd., Odessa, TX 79762, USA
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Song J, van Velde JW, Vertommen LLT, Smith DF, Heeren RMA, van den Brink OF. End-Group Analysis of Methacrylic (Co)polymers by LC-ESI-MS2. Macromolecules 2011. [DOI: 10.1021/ma102681g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Junkan Song
- Research, Development and Innovation, AkzoNobel, Deventer, The Netherlands
| | - Jan W. van Velde
- Research, Development and Innovation, AkzoNobel, Deventer, The Netherlands
| | | | - Donald F. Smith
- FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands
| | - Ron M. A. Heeren
- FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands
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Wei J, Zhang W, Wickham R, Sita LR. Programmable Modulation of Co-monomer Relative Reactivities for Living Coordination Polymerization through Reversible Chain Transfer between “Tight” and “Loose” Ion Pairs. Angew Chem Int Ed Engl 2010; 49:9140-4. [DOI: 10.1002/anie.201004709] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wei J, Zhang W, Wickham R, Sita LR. Programmable Modulation of Co-monomer Relative Reactivities for Living Coordination Polymerization through Reversible Chain Transfer between “Tight” and “Loose” Ion Pairs. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004709] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Baumgaertel A, Altuntaş E, Kempe K, Crecelius A, Schubert US. Characterization of different poly(2-oxazoline) block copolymers by MALDI-TOF MS/MS and ESI-Q-TOF MS/MS. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24364] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Crecelius AC, Becer C, Knop K, Schubert US. Block length determination of the block copolymer mPEG-b-PS using MALDI-TOF MS/MS. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24223] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Affiliation(s)
- Steffen M. Weidner
- Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Richard-Willstaetter-Strasse 11, Germany, and Department of Chemistry, Wayne State University, 5101 Cass Avenue, 33 Chemistry, Detroit, Michigan 48202
| | - Sarah Trimpin
- Federal Institute for Materials Research and Testing (BAM), D-12489 Berlin, Richard-Willstaetter-Strasse 11, Germany, and Department of Chemistry, Wayne State University, 5101 Cass Avenue, 33 Chemistry, Detroit, Michigan 48202
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Knop K, Jahn BO, Hager MD, Crecelius A, Gottschaldt M, Schubert US. Systematic MALDI-TOF CID Investigation on Different Substituted mPEG 2000. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.200900309] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Gruendling T, Weidner S, Falkenhagen J, Barner-Kowollik C. Mass spectrometry in polymer chemistry: a state-of-the-art up-date. Polym Chem 2010. [DOI: 10.1039/b9py00347a] [Citation(s) in RCA: 194] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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