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Synthesis, Crystal Structure, and Selected Properties of [Au(S2CNH2)2]SCN : A Precursor for Gold Macro-Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride

Title data

Teske, Christoph Ludwig ; Hansen, Anna-Lena ; Weihrich, Richard ; Kienle, Lorenz ; Kamp, Marius ; van der Zwan, Kasper Pieter ; Senker, Jürgen ; Dosche, Carsten ; Wittstock, Gunther ; Bensch, Wolfgang:
Synthesis, Crystal Structure, and Selected Properties of [Au(S2CNH2)2]SCN : A Precursor for Gold Macro-Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride.
In: Chemistry : a European Journal. Vol. 25 (May 2019) Issue 27 . - pp. 6763-6772.
ISSN 1521-3765
DOI: https://doi.org/10.1002/chem.201805913

Abstract in another language

A new preparation route is developed for the synthesis of needle-like crystals of Au(S2CNH2)(2)] SCN, which avoids disproportionation of the AuI salt used as a starting material. In the crystal structure, the two crystallographically independent AuIII centers are in a square-planar environment of two S2CNH2 ligands. The Hirshfeld surface analysis reveals the presence of noncovalent intermolecular S...S interactions, which are essential for the spatial arrangement of the molecules. Density functional theory (DFT) calculations including dispersion and damping corrections result in a unit cell volume very close to the value determined experimentally. Thermal decomposition in an inert atmosphere generates black needles with lengths of up to 500 mu m. X-ray powder diffraction and pair distribution function analyses demonstrate that the needles are composed of nanosized crystals with a volume-weighted average domain size of 20(1) nm. According to results of X-ray photoemission experiments, the black needles are covered by a nitrogen-rich carbon nitride with composition near (CN)(2)N.C-13 solid-state NMR investigations indicate that two different carbon species are present, with signals corresponding well to heptazine units as in melon and triazine units as in poly(triazin imide) type compounds. Scanning transmission electron microscopy tomography evidences that the needles are composed of slightly elongated nanoparticles.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: ISI:000471039200016
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III > Chair Anorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 540 Chemistry
Date Deposited: 25 Sep 2019 09:16
Last Modified: 25 Sep 2019 09:16
URI: https://eref.uni-bayreuth.de/id/eprint/52429