ABSTRACT
Six novel spirobenzopyrans bearing macrocyclic dioxopolyamine were synthesized. Their photochromic, transition metal cations–induced photochromic properties were investigated.
Acknowledgments
The authors acknowledge financial support from National Natural Science Foundation of China (No. 20242010, 20472023), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and the Hubei Provincial Science Fund for Distinguished Young Scholars (No. 2003ABB006).