Absorption and luminescence spectra and photodecomposition of zinc(II) complex with bis(1,2,3,7,9-pentamethyldipyrrin-8-yl)methane in solution and polymer matrix

New polymeric materials containing dinuclear double-stranded zinc(II) helicate with bis(1,2,3,7,9-pentamethyldipyrrin-8-yl)methane have been prepared on the basis of poly(methyl methacrylate) and tetraethoxysilane. The zinc(II) complex [Zn₂L₂] retains its fluorescence properties in a poly(methyl methacrylate) film. The photostability of [Zn₂L₂] in poly(methyl methacrylate) is higher by a factor of ≈2.5 than in the benzene solution. Conditions have been found for the preparation of [Zn₂L₂]-doped silicate matrix based on tetraethoxysilane via the sol–gel method. The [Zn₂L₂] complex in the tetraethoxysilane solid matrix shows a weak fluorescence with its maximum at λ = 545–549 nm.