title: Synthesis of nanodiamond derivatives carrying amino functions and quantification by a modified Kaiser test.
abstract: Nanodiamonds functionalized with different organic moieties carrying terminal amino groups have been synthesized. These include conjugates generated by Diels-Alder reactions of ortho-quinodimethanes formed in situ from pyrazine and 5,6-dihydrocyclobuta[d]pyrimidine derivatives. For the quantification of primary amino groups a modified photometric assay based on the Kaiser test has been developed and validated for different types of aminated nanodiamond. The results correspond well to values obtained by thermogravimetry. The method represents an alternative wet-chemical quantification method in cases where other techniques like elemental analysis fail due to unfavourable combustion behaviour of the analyte or other impediments.
authors.affiliation: Institute for Organic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Gerald
authors.initials: G
authors.lastname: Jarre
authors.affiliation: Institute for Organic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Steffen
authors.initials: S
authors.lastname: Heyer
authors.affiliation: Institute for Organic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Memmel
authors.affiliation: Institute for Organic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Meinhardt
authors.affiliation: Institute for Organic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany ; Wilhelm Conrad Röntgen Research Center for Complex Material Systems (RCCM), Julius-Maximilians-Universität Würzburg, Germany.
authors.forename: Anke
authors.initials: A
authors.lastname: Krueger
keywords: Diels–Alder reaction; Kaiser test; amino groups; carbon nanomaterials; nanodiamond; pyrazine