Photoisomerization

Photoisomerizable substrates have been put to practical use, for instance, in pigments for rewritable CDs, DVDs, and 3D optical data storage solutions.

Another class of device that uses the photoisomerization process is as an additive in liquid crystals to change their linear and nonlinear properties.

[6] Due to the photoisomerization is possible to induce a molecular reorientation in the liquid crystal bulk, which is used in holography,[7] as spatial filter[8] or optical switching.

When converted back to norbornadiene, quadryicyclane’s ring strain energy is liberated in the form of heat (ΔH = −89 kJ/mol).

[14] One case is the conversion of the colorless cis-bis(triphenylphosphine)platinum chloride to the yellow trans isomer.

Photoisomerization of azobenzene [ 1 ]
Methyl red molecule, a common azo dye used in liquid crystal doping
Photoisomerization of norbornadiene to quadricyclane.
Photoisomerization of PtCl 2 (PPh 3 ) 2
Light-induced spin-crossover of [Fe(pyCH 2 NH 2 ) 3 ] 2+ , which switches from high and low-spin