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Research Article

Vanillin-Based Polymers—part II: Synthesis of Schiff Base Polymers of Divanillin and Their Chelation with Metal Ions

Table 1

1H and 13C NMR data of divanillin Schiff base polymers (4a–c) in DMSO- .
Polymer 1H (ppm) 13C (ppm)
4a3.50 (OH), 3.64 (2XCH2), 3.75 (OCH3), 7.28 (Ar), 7.48 (Ar), 8.14 (CH=N)55.7 (2XCH2), 57.5 (OCH3), 107.8 (Ar), 126.2 (Ar), 128.3 (Ar), 130.0 (Ar), 151.6 (2XC, Ar), 164.2 (CH=N)
4b2.03 (CH2), 3.50 (OH), 3.58 (2XCH2), 3.75 (OCH3), 7.28 (Ar), 7.48 (Ar), 8.15 (CH=N)29.5 (CH2), 56.7 (2XCH2),58.3 (OCH3), 107.2 (Ar), 126.1 (Ar), 128.3 (Ar), 130.0 (Ar), 151.6 (2XC, Ar), 164.5 (CH=N)
4c1.24 (2XCH2), 1.56 (2XCH2), 3.50 (OH), 3.52 (2XCH2), 3.75 (OCH3), 7.15(Ar), 7.38 (Ar), 8.20 (CH=N)26.6 (2XCH2), 30.5 (2XCH2), 55.6 (2XCH2), 55.7 (OCH3), 107.7 (Ar), 128.1 (Ar), 128.6 (Ar), 129.8 (Ar), 151.0 (Ar), 151.5 (Ar) 162.0 (CH=N)