1. Organic Semiconductor Centre; SUPA; School of Physics & Astronomy; University of St Andrews; St Andrews KY16 9SS UK
2. WestCHEM; Department of Pure & Applied Chemistry; University of Strathclyde; Glasgow G1 1XL UK
3. Institute of Physical-Organic Chemistry and Coal Chemistry; 83114 Donetsk Ukraine
4. Department of Engineering Science; University of Oxford; Oxford UK