Rational design and construction of the first tetrahedral net with photoluminescent Cu4I4 cubane cluster as the tetrahedral node

Abstract

Solvothermal reaction of CuI with flexible 1,3-bis(4-pyridyl)propane generated the first three-dimensional coordination polymer constructed with the rigid tetrahedrally connected Cu₄I₄ cluster unit. The net is a rare chiral triple-interpenetrated, quartz net with of vertex symbol 6⁴.8². The solid-state luminescence spectrum displays a strong red emission band at room temperature (λ_max = 601 nm), characteristic of the Cu₄I₄ cluster centers.