1. Departments of Chemistry and Biomedical Sciences, University of Hull, Cottingham Road, Hull, HU6 7RX, UK
2. School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
3. MRI Centre, Royal Infirmary Hospital NHS Trust, Anlaby Road, Hull, HU3 2JZ, UK
4. Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, Fourth Floor Lambeth Wing, St Thomas’ Hospital, London, SE1 7EH, UK