M. Imlau, V. Dieckmann, T. Weisemoeller, D. Schaniel, T. Woike, K. W. Krämer and H.-U. Güdel
Tuning Ability of Photosensitive ML₅NO-Molecules
in "Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More",
OSA Technical Digest (CD), Optical Society of America, Paper SuC5 (2007)                 

Abstract: We show that photosensitivity is a general property of linkage isomers in nitrosyl-containing [ML₅NO]^m±-molecules (M:metal, L: ligand, m: formal charge). The benefit of this generality is reflected in the tailoring properties of the photosensitive response.