SYNTHESIS, CHARACTERIZATION, ADN INVESTIGATION OF PHOTOCHROMIC PROPERTIES OF TWO NOVEL CATIONIC INDOLINOSPIROPYRANS
HE Wei, ZHOU Jinwei, SUI Qiang, LI Zhongjiea, WANG Yanqiao
Imaging Science and Photochemistry . 1999, (3): 264 -269 .  DOI: 10.7517/j.issn.1674-0475.1999.03.264