Winnik*, F. M.; Winnik, M. A.; Ringsdorf, H.; Venzmer, J. Bis-(1-Pyrenylmethyl) Ether As An Excimer-Forming Probe Of Hydrophobically-Modified Poly-(N-Isopropylacrylamides) In Water. J. Phys. Chem. 1991, 95, 2583?2587.