Self-assembly of luminescent 42-metal lanthanide nanowheels with sensing properties towards metal ions and nitro explosives

Abstract

Two 42-metal lanthanide nanowheels [Ln42L14(OH)28(OAc)84] (Ln = Yb (1), Sm (2)) with a NIR luminescent response towards metal ions and nitro explosives were constructed.

Uncoordinated‐substituents‐induced zinc(II) coordination polymers exhibiting multifunctional fluorescent sensing activity for cations, anions and organochlorine pesticides

“…Under the same test conditions, the fluorescence intensity of 3 is very weak, which may be due to the fact that the nitro group. As an electron‐deficient group, the nitro group of NIP in 3 will undergo electron transfer when it comes into contact with the electron‐rich N‐containing L ligand, which reduces the fluorescence intensity [44–46] . The difference of fluorescence intensity between the CPs may be caused by different structures [33] …”

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

“…The 1 H NMR spectrum of cerium bromide cluster 6 a in [D 6 ]benzene at ambient temperature (Figure S7) shows one signal set for the Cp' ligands. The Cp' hydrogen atoms resonate at 19.71 ppm and À 0.31 ppm, respectively, and the trimethylsilyl group at (8). Both crystal structures were revealed by XRD analyses (Figure 2 and Figure S23).…”

“…The main driving force behind rare-earth-metal (Ln) cluster research is marked by a wide range of potential applications. [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.…”

“…[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.…”

“…[26] Super-large lanthanide cluster compounds such as [Gd 140 (CO 3 ) 20 (μ 3 -OH) 100 (CH 3 COO) 80 (LH 3 ) 40 (H 2 O) 200 ]-(NO 3 ) 80 (H 2 O) x are generally synthesized via hydro-or solvothermal reaction pathways. [2,5,6,8,27] The switch to anhydrous, donor-free syntheses, which is mandatory for accessing organolanthanide clusters, goes hand in hand with a substantial decrease in cluster size. [28] Not surprisingly, it is the ubiquitous cyclopentadienyl ligand system which triggered the formation of single-crystalline clusters, as revealed for mono(cyclopentadienyl) derivatives.…”