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1H NMR of A) 5,5"'- bishydroxymethyl-3,3"'-dimethyl-2,2':5',2":5",2"'-quaterthiophene (QAPE); B) 5,5"'- bishydroxymethyl-3,3"'-dimethyl-2,2':5',2":5",2"'-quaterthiophene-co-adipic acid polyester. Preservation of the aromatic signals (a, b, and c) is seen between 6.8 and 7.4 ppm and a downfield shift of the allylic protons (e) is observed in the NMR spectrum of QAPE.
