title: A novel supramolecular compound 2,2'-bipyridyl-phosphotungstic acid: synthesis and catalysis.
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.
authors.affiliation: College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, China.
authors.forename: Qiong-Sheng
authors.initials: QS
authors.lastname: Wang
authors.forename: Shi-Ming
authors.initials: SM
authors.lastname: Wang
authors.forename: Shan
authors.initials: S
authors.lastname: Lin
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D002384:Catalysis; D046911:Macromolecular Substances / Q000138:chemical synthesis* / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010772:Phosphotungstic Acid / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D046911:Macromolecular Substances; D010772:Phosphotungstic Acid; D015082:2,2'-Dipyridyl