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A novel supramolecular compound 2,2'-bipyridyl-phosphotungstic acid: synthesis and catalysis
Qiong-Sheng Wang1, Shi-Ming Wang, Shan Lin
1College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, China.
Abstract:
A new supramolecular compound (C(10)H(8)N(2))(3.2).H(3)PW(12)O(40).25.6H(2)O (Bipy-PW(12)) was synthesized by self-assembly design, and characterized by elemental analysis, Fourier-transform infrared spectra (FTIR), and (31)P NMR spectra. Bipy-PW(12) can effectively catalyze oxidative degradation of chitosan with H(2)O(2) in heterogeneous phase. To obtain water-soluble chitosan with an average molecular weight of 5000, the optimum reaction conditions were determined as follows: reaction temperature, 80 degrees C; reaction time, 13min; H(2)O(2) concentration, 2.7mol/L; and mass ratio of Bipy-PW(12) to chitosan, 0.01.
