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Two 14-metal lanthanide nanorings [Ln14(HL)2L20(DMF)8(H2O)8] (Ln = Nd(1) and Gd(2)) were constructed from a tridentate ligand. 1 displays NIR luminescence sensing properties towards metal cations and anions, especially Cu2+, Co2+, H2PO4− and F− at a ppm level. [ABSTRACT FROM AUTHOR]

A nanoscale Yb(III) complex [Yb 6 (L1) 2 (L2) 4 (OH) 4 (CF 3 SO 3) 2 (DMF) 2 (EtOH) 4 ]·2(CF 3 SO 3)·2OH (1) with Schiff base ligand N,N′-bis(3-methoxysalicylidene)(binaphthyl)-1,4-diamine (H 2 L1) and salicylaldehyde ligand 3-methoxysalicylaldehyde (H 2 L2) was synthesized. Upon excitation of the ligand-centered absorption bands, 1 displays typical NIR luminescence of Yb(III). Interestingly, it shows lanthanide luminescence response to anions and nitro explosives, especially with high sensitivity to F− and PA. Meanwhile, the quenching effect of F− and PA to the lanthanide luminescence of 1 is not affected by the existence of other anions and explosives. Image 1 • The complex shows a nanoscale blocky structure. • The complex displays typical NIR lanthanide luminescence. • The complex exhibits NIR luminescence response to anions and explosives. [ABSTRACT FROM AUTHOR]

Two 4f and 3d-4f complexes [Yb 3 L 3 (OAc) 3 (1) and [Zn 2 NdL 2 (OAc) 3 (2) were constructed from Schiff base ligand N,N′-bis(3-methoxysalicylidene)(4-methylphenylene)-1,2-diamine (H 2 L). 1 shows a chiral "triple-decker" structure with Yb3+ ions sandwiched between the alternating layers of Schiff base ligands, while 2 exhibits a "cross" structure with the Nd3+ ion clipped by two ZnL groups. Open 3D channel structures running along the a -axis are formed in the solid state of 1 and 2. Excited by ligand-centered absorption bands, 1 and 2 show typical NIR emission of Yb3+ and Nd3+, respectively. Interestingly, 2 exhibits lanthanide luminescent response towards anions, especially to CN− and OAc− at ppm level. Image 1 • The complexes show "triple-decker" and "cross" structures. • The complexes display typical NIR lanthanide luminescence. • The Zn–Nd complex exhibits lanthanide luminescent response towards anions. [ABSTRACT FROM AUTHOR]