Description  Claims  Drawing  Cited references 

US5252742A   [0004] 
CN101704921   [0006] 
EP0328320A1   [0015] 

Spiropyrans as molecular optical switches   [0005] 
Photochromic Behavior of Spiropyran and Fulgide in Thin Films of Blends of PMMA and SBS   [0008] 
Photochromic behavior of spiropyran in polystyrene and polycaprolactone thin films - Effect of UV absorber and antioxidant compound   [0009] 
Photochromic behavior of spiropyran in polymer matrices   [0010] 
Photo-responsive polymeric structures based on spiropyran   [0011] 
Synthesis and Properties of Benzophenone-Spiropyran and Naphthalene-Spiropyran Conjugates   [0012] 
Photodynamic transport of metal ions   [0013] 
Synthesis and studies of photochromic properties of spirobenzopyran carboxy derivatives and their model compounds as potential markers   [0014]