TY - JOUR
T1 - 高聚合度聚磷酸铵中特征磷的31P核磁共振分析
AU - Liu, Yina
AU - Yang, Rongjie
AU - Hu, Weiguo
AU - Li, Dinghua
N1 - Publisher Copyright:
© 2020, Editorial Department of Chem. J. Chinese Universities. All right reserved.
PY - 2020/12/10
Y1 - 2020/12/10
N2 - In this paper, phosphorus nuclear magnetic resonance(31P NMR), J-resolved and 31P-DOSY are used to study the characteristic phosphorus and coupling constants of APP. Studies have shown that the end-group phosphors of polyphosphate and diphosphate have double-peak and single-peak characteristics respectively, and the coupling constant of spin-coupled peak is 19.4 Hz; Ammonium phosphate(Ⅱ-APP) contains ammonium di-polyphosphate and ammonium orthophosphate. When 31P NMR is used to quantitatively characterize the degree of APP polymerization, the terminal phosphorus of ammonium di-polyphosphate should be excluded; when APP is prepared by dissolving APP in water at 100 ℃, the appearance of the phosphorus resonance peak of small molecule middle phosphorus proves that APP has partially broken chain.
AB - In this paper, phosphorus nuclear magnetic resonance(31P NMR), J-resolved and 31P-DOSY are used to study the characteristic phosphorus and coupling constants of APP. Studies have shown that the end-group phosphors of polyphosphate and diphosphate have double-peak and single-peak characteristics respectively, and the coupling constant of spin-coupled peak is 19.4 Hz; Ammonium phosphate(Ⅱ-APP) contains ammonium di-polyphosphate and ammonium orthophosphate. When 31P NMR is used to quantitatively characterize the degree of APP polymerization, the terminal phosphorus of ammonium di-polyphosphate should be excluded; when APP is prepared by dissolving APP in water at 100 ℃, the appearance of the phosphorus resonance peak of small molecule middle phosphorus proves that APP has partially broken chain.
KW - Ammonium polyphosphate
KW - Characteristic phosphorus
KW - Degree of polymerization
KW - Nuclear magnetic resonance
UR - http://www.scopus.com/inward/record.url?scp=85099033943&partnerID=8YFLogxK
U2 - 10.7503/cjcu20200365
DO - 10.7503/cjcu20200365
M3 - 文章
AN - SCOPUS:85099033943
SN - 0251-0790
VL - 41
SP - 2832
EP - 2837
JO - Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
JF - Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
IS - 12
ER -