Preparation, Photochromic Properties of Keggin Type Tungstophosphoric Acids Based on Polyacrylamide
FENG Wei, ZHAGN Tie-Rui, LIU Yan, LU Ran, ZHAO Ying-Ying, YAO Jian-Nian
Chem. J. Chinese Universities . 2000, (10): 1563 -1565 .