Novel photochromism of differently-linked bis-benzopyrans.
The unique photochromic bis-chromene 5 incorporates the structural attributes of both 3 and 4 . UV-vis irradiation of 5 leads to a dark brown colour, which is formed by mixing the purple and red colours observed for the photolysates of 3 and 4 , respectively.
Moorthy
Jarugu Narasimha
JN
Department of Chemistry, Indian Institute of Technology, Kanpur, 208016, India. moorthy@iitk.ac.in
Venkatakrishnan
Parthasarathy
P
Samanta
Subhas
S