Research Article

Spirooxazine Photoisomerization and Relaxation in Polymer Matrices

Table 1

Spectral parameters of SPO-7OH in polymers matrices.

SampleTemperature (K) 𝜆 m a x (nm) 𝐴 ( 𝑡 ) 𝑖 (a.u.) 𝑡 𝑖 (s) 𝐴 ( 𝑡 ) 𝑟 (a.u.) 𝑡 𝑟 (s)

SPO-7OH P(MMA-BMA)3036130.5692000.167200
SPO-7OH P(MMA-BMA)3136130.4022000.078200
SPO-7OH P(MMA-BMA)3236130.0202000.015200
SPO-7OH P(MMA-BMA)3336130.0842000.00080
SPO-7OH PVP3036100.1942000.115200
SPO-7OH PVP3136100.1702000.110200
SPO-7OH PVP3236100.1262000.083200
SPO-7OH PVP3336100.0842000.058200

𝐴 ( 𝑡 ) 𝑖 : absorbance of merocyanine measured after time 𝑡 𝑖 during illumination with light;
𝐴 ( 𝑡 ) 𝑟 : absorbance of merocyanine measured after time 𝑡 𝑟 during thermal relaxation.