Laser ablation synthesis of new gold arsenides using nano‐gold and arsenic as precursors. Laser desorption ionisation time‐of‐flight mass spectrometry and spectrophotometry. (5th February 2014)

• Record Type: Journal Article
• Authors: Prokeš, Lubomír; Peña‐Méndez, Eladia María; Conde, José Elias; Panyala, Nagender Reddy; Alberti, Milan; Havel, Josef
• Is Part Of: Rapid communications in mass spectrometry. Volume 28:Number 6(2014)
• Page Start: 577
• Page End: 586
• Publication Date: 2014-02-05
• Subjects: Mass spectrometry -- Periodicals; 543.65
• DOI: 10.1002/rcm.6815
• Languages: English
• ISSNs: 0951-4198

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="rcm6815-sec-0001" sec-type="section"> <title>RATIONALE</title> <p>Currently, a limited number of gold arsenides have been described, some of which have important industrial applications, Laser ablation synthesis (LAS) has been employed in an attempt to generate some novel gold arsenide compounds.</p> </sec> <sec id="rcm6815-sec-0002" sec-type="section"> <title>METHODS</title> <p>LAS of gold arsenides was performed using nano‐gold (NG) and arsenic as precursors. The clusters formed during laser desorption ionisation (LDI) were analysed by mass spectrometry using a quadrupole ion trap and reflectron time‐of‐flight analyser to determine the stoichiometry. UV/VIS spectrophotometry was used to follow possible hydrothermal synthesis of gold arsenides.</p> </sec> <sec id="rcm6815-sec-0003" sec-type="section"> <title>RESULTS</title> <p>LAS of NG yielded singly charged gold clusters Au<italic><sub>m</sub></italic><sup>+(−)</sup> (<italic>m</italic> = 1–35). LAS of bulk arsenic and nano‐arsenic produced As<italic><sub>n</sub></italic><sup>+(−)</sup> clusters with <italic>n</italic> = 2–10 and <italic>n</italic> = 2–20, respectively. Laser ablation of Au‐As nano‐composites or NG‐As mixtures generated Au<italic><sub>m</sub></italic><sup>+(−)</sup> (<italic>m</italic> = 1–12), As<italic><sub>n</sub></italic><sup>+(−)</sup> (<italic>n</italic> = 3–4), and several series of Au<italic><sub>m</sub></italic>As<italic><sub>n</sub></italic><sup>+(−)</sup> (<italic>m</italic> = 1–60, <italic>n</italic> = 1–18) clusters. Over 450 species of gold arsenide clusters and 212 mixed chlorinated Au<italic><sub>m</sub></italic>As<italic><sub>n</sub></italic>Cl<italic><sub>x</sub></italic> clusters were detected and their stoichiometry determined.</p> </sec> <sec id="rcm6815-sec-0004" sec-type="section"> <title>CONCLUSIONS</title> <p>Many new gold arsenides were synthesised via LAS for the first time with Au‐As composites and NG‐As mixtures of different Au:As ratios using mass spectrometry to determine cluster stoichiometry. The resolved stoichiometry of Au<italic><sub>m</sub></italic>As<italic><sub>n</sub></italic> clusters determined in this study could accelerate the development of advanced Au‐As nano‐materials. Copyright © 2014 John Wiley & Sons, Ltd.</p> </sec> </abstract>