Funding for this research was provided by:
University of South Africa
Received: 15 August 2019
Accepted: 28 August 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: This study was primarily a chemistry investigation and involved no human or animal participants as a result no ethics approval was required in the respective institutions.
: No consent was required for the publication of any of the data.
: We wish to confirm that there are no known conflicts of interest associated with this publication and there has been no significant financial support for this work that could have influenced its outcome. All corroborating data may be obtained from the corresponding author.