A 42-metal Yb(iii) nanowheel with NIR luminescent response to anions

Abstract

The NIR luminescence sensing responses of a 42-metal lanthanide nanowheel [Yb42L14(OH)28(OAc)84] to anions, especially to fluoride, were investigated.

Construction of an Octanuclear Zn(II)‐Yb(III) Schiff Base Complex for the NIR Luminescent Sensing of Nitrofuran Antibiotics

“…Our recent research interests have focused on the design of lanthanide complexes for the luminescent sensing of small molecules and ions. [ 21‐23 ] We herein report the construction of one NIR luminescent lanthanide complex [Zn 6 Yb 2 L 4 (OAc) 2 (DMF)EtOH] ( 1 ) from a new Schiff base ligand N , N ′‐bis(3‐hydroxysalicylidene)(4‐methoxyphenylene)‐1,2‐diamine (H 4 L, Scheme 1), which has a phenyl backbone. 1 was obtained from the reaction of H 4 L with Yb(OAc) 3 ·4H 2 O and Zn(OAc) 2 ·2H 2 O. Interestingly, 1 has an octanuclear structure and exhibits high NIR luminescent response to NFAs.…”

Half‐Sandwich Complexes [Cp′4Ln4I8]4 (Ln=Ce, Pr):Emergence of Donor‐Free Organolanthanide Nanowheels

“…This can be explained by the higher degree of rotational and steric freedom for the subunit of cluster 4 a, which is bridged via μ 2 -iodido ligands, compared to the subunit in compound 3, where the bridging cyclopentadienyl ligands exert a high steric strain on the two subunits. Likewise, the distances between the apical cerium centers in complex 4 a and the μ 2 -bridging iodido Whereas donor-free lanthanide clusters usually show spherical arrange-ments, [34,35,[42][43][44] ring structural motifs are more common for lanthanide clusters bridged via donor ligands like, e. g., {Gd 140 } or {Yb 42 }, [6,20,45,46] or smaller sandwich-type ringcluster hybrids such as, e. g., [(C 5 Me 5 ) 2 Sm(μ 2 -Cl)] 3 . [36,[47][48][49][50][51][52][53][54] In sandwich-type ring structures, the metal centers display a more or less planar arrangement, while the deviation from planarity naturally increases with the steric demand of the ligand system or ligand complexity.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] While organolanthanide clusters assist in unravelling the active species of industrial 1,3-diene polymerization catalysis, [14] luminescent coordination clusters do impress with intriguing structural motifs and bright colors. [8,10,13,[15][16][17][18][19][20] As for cerium(III) (4 f 1 ), the photoluminescent properties are determined by dipole-allowed 5 d!4 f transitions, which enables efficient tuning of the emission wavelength of complexes. [21][22][23] This effect can be further enhanced in terms of the luminescence intensity in combination with a variety of ligand systems, including cyclopentadienyl derivatives [24] or hydridotris(pyrazolyl)borato ligands, [25] given their stabilizing properties.…”

Construction of a Nano‐rectangular Zn(II)‐Yb(III) Complex with Near‐Infrared Luminescent Response towards Metal Ions

“…[ 20,21 ] In our previous study, a series of “multi‐decker” lanthanide complexes were constructed from salen type Schiff base ligand bis(3‐methoxysalicylidene)‐ethylene‐ 1,2‐phenylenediamine (H 2 L, Scheme 1), in which Ln(III) ions are sandwiched between alternating layers of the Schiff‐base ligands. [ 22,23 ] As part of our current research interests in the luminescent response of d‐4f complexes towards various analytes, [ 24,25 ] we report here the construction and NIR luminescence properties of a 6‐metal Zn‐Yb complex [Zn 2 Yb 4 L 2 (OAc) 10 (OH) 2 (CH 3 OH) 2 ] ( 1 )…”