1 Supporting Information 1,8-Naphthalimide-based Polymers Exhibiting Deep-red Thermally Activated Delayed Fluorescence and Their Application in Ratiometric Temperature Sensing By Cheyenne J. Christopherson, Don M. Mayder, Jade Poisson, Nathan R. Paisley, Christopher M. Tonge and Zachary M. Hudson* Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1. Tel: +1-604-822-3266; Fax: +1-604-822-2847; e-mail: zhudson@chem.ubc.ca.