OAc--Dependent Self-Assembly of Luminescent Homoleptic [Ln9(OH-Salen)5(OH)4(OAc)10] and {[Ln6(OH-MeO-Salen)5(OH)(OAc)2(H2O)2]•(OAc)} Complexes

Two series of OAc--dependent unique homoleptic nonanuclear [Ln(9)(L-1)(3)(HL1)(2)(mu(3)-OH)(4)(OAc)(10)] (1-7) and hexanuclear {[Ln(6)(L-2)(4)(HL2)-(mu(3)-OH)(OAc)(2)(H2O)(2)]center dot(OAc)} (8-14) are obtained from the self-assembly of the partially deprotonated OH-H(2)Salen ligand H3L1 (N,N'-bis(salicylidene)(propylene-2-ol)-1,3-diarnine) or OH-MeO-H(2)Salen ligand H3L2 (N,N'-bis(3-methoxysalicylidene)(propylene-2-ol)-1,3-diamine) with Ln(OAc)(3) (Ln = La, Eu, Tb, Gd, Nd, Yb, or Er), respectively. The result of their photophysical properties shows that the sensitization for single component near-white-light of complex 2, efficient Eu3+-centered red-light (Phi(L)(Eu) = 13.4%) of complex 9, or or Tb3+-centered yellowish-green-light (Phi(L)(Tb) = 8.1% and 21.3%) of complexes 3 and 10, and Nd3+- or Yb3+-centered NIR luminescence (eta = Phi(L)(Ln)/Phi(Ln)(Ln) = 67-75% and 76-85%) for complexes 5-6 and 12-13, arose from the ligands' (3)pi-pi* excited state, due to effective intramolecular energy transfer and multiple Ln(3+)-to-Ln(3+) electron-communications.