Covalently-bonded grafting of [Ln3(Benzimidazole)4]-arrayed (Ln = Tb, Nd, Yb or Er) complex monomers into PNBE (poly(norbornene)) with highly luminous color-purity green-light or efficient NIR luminescence

Within Poly({[Ln3(L)4(NO3)6]·(NO3)·(H3O)2}-co-NBE) (Ln = Tb, 3; Nd, 4; Yb, 5 or Er, 6), PNBE-assisted effective energy transfer renders Poly(3-co-NBE) Tb3+-centered color-purity green-light (ΦTbL = 87%) and efficient NIR luminescence (ΦNdL = 0.61%; ΦYbL = 1.47% and ΦErL = 0.03%) for Nd3+-, Yb3+- and Er3+-grafted polymers.157