1 Supporting Information Using light to tune thermo-responsive behavior and host-guest interactions in tegylated poly(azocalix[4]arene)s Szymon Wiktorowicz, Heikki Tenhu and Vladimir Aseyev* Department of Chemistry, Laboratory of Polymer Chemistry, University of Helsinki, PB 55 (A.I.Virtasen aukio 1), FIN-00014 HY, Finland * Corresponding Author. Tel: +358 9 191 50333. Fax: +358 9 19150330. Vladimir.Aseyev@helsinki.fi