10.1.18--MMM. -- Yellow in Sherpa: Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: grey tick subject to Restrictions below, author can archive post-print (ie final draft post-refereeing) Restrictions: 12 months embargo Publisher's Version/PDF: cross author cannot archive publisher's version/PDF General Conditions: Pre-prints on non-commercial repositories and arXiv Author's post-print on author's personal website, institutional repository, open access repository, scholarly communications networks that comply with International Association of STM Publishers sharing principles Publisher's version/PDF cannot be used Restrictions on further re-use and further distribution to be noted Publisher will deposit in Chemical Sciences Article Repository if requested NIH authors may have their articles deposited in PubMed Central on their behalf.. -- 12 MONTHS EMBARGO for accepted v. ENDS May 2018, requested (Yeager), 12.1.18-MMM. Revd & added with embargo date 23.1.18-MMM