Template construction of a series of supramolecular coordination polymers via 6,7-dihydro-5H-[1,4]diazepino[1,2,3,4-lmn][1,10]phenanthroline-4,8-diium cation

Abstract

Five cation-induced complexes, (phen-dzp) [ZnBr₃N₃] (1), (phen-dzp) [ZnCl₂Br₂] (2), (phen-dzp) (H₃O)₂ [Fe(CN)₆] (3), (phen-dzp)₂ [Cu₂I₆] (4), and [(phen-dzp)(Ag₂Br₄)] _n (5) [phen-dzp = (C₁₅H₁₄N₂)²⁺, 6,7-dihydro-5H-[1,4]diazepino[1,2,3,4-lmn][1,10]phenanthroline-4,8-diium], have been synthesized via self-assembly in solution. The crystal structures of 1–3 show that they all crystallize in monoclinic systems with mononuclear structures. Compound 4 is a binuclear coordination polymer. Complex 5 possesses a 2-D supramolecular layer with the organic cation phen-dzp trapped in it; interestingly, each inorganic polymeric planar layer is composed of large, decagon rings formed by sharing four Br⁻ and four [Ag₂Br₄] quadrilateral units with six adjacent decagon rings. The results provide insights into template effects of synthetic approaches on the construction of supramolecular compounds. The structures of 1–5 have been characterized by elemental analysis, infrared spectra, and single-crystal X-ray crystallography. Solid-state photoluminescence properties of 1–5 have been determined.

Keywords:

• Template effect
• Photoluminescence property
• X-ray crystal structure