Experimental Evidence for the Solid-State Nitrite-Ligand Photoisomerization Mechanism in Nickel(II) Square-Planar Complexes.

ABSTRACT: Two square-planar nitrite nickel-(II) photoswitches were designed and synthesized, referred to as Ni-4d and the related oxime Ni-4d'. In the ground-state single crystals of both compounds, the nitro form (Ni-N-(O)₂) is the dominant one. For the two systems, it was possible to generate and detect both endo-nitrito and exo-nitrito linkage isomers using 530 nm light-emitting diode (LED) light at 100 K. Over time, the endo-nitrito form takes over, and almost 100% conversion can be achieved, as confirmed by photocrystallographic and infrared (IR) spectroscopic experiments. The stability of this isomer is similar for both systems, which is confirmed by the experimentally determined decay temperature (T _d) values. Furthermore, when 6

SUBMITTER: Deresz KA 

PROVIDER: S-EPMC12593162 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature