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A dual-functional sensor based on a two-dimensional metal–organic framework (MOF), namely, {[Cd(BBZB)(2,6-NDC)]·CH3OH}n (JXUST-6, BBZB = 4,7-bis(1H-benzimidazole-1-yl)-2,1,3-benzothiadiazole and 2,...

Four transition metal–organic frameworks were solvothermally synthesized with V-shaped 1,3-bis(1-imidazolyl)benzene (bib) and two Y-shaped carboxylate ligands (1,3,5-benzenetricarboxylic acid (H3btc) and 3,5-pyridinedicarboxylic acid (H2pydc)), namely, {[M2(μ3-OH)(bib)(btc)]·H2O}n (M = Co (1) and Fe (2)) and {[M′2(μ3-OH)(μ2-NO3)(bib)(pydc)]·solvents}n (M′ = Co (3) and Ni (4)). All of them are characterized by single-crystal X-ray diffraction, infrared spectrosopy, and powder X-ray diffraction. Both complexes 1 and 2 present two-dimensional (3,8)-connected layer structures, and the point symbol is (3.42)2(34.46.56.68.73.8), but Fe2 in 2 is weakly coordinated to O5 as a trigonal bipyramidal geometry compared with the tetrahedral Co2 in 1, while complexes 3 and 4 exhibit three-dimensional “pillar-layer” structures with (3,8)-connected tfz-d net. Interestingly, nitrate anions with a rare μ2-η2 coordination mode take part in coordination, and rectangular channels along the c axis exist in 3 and 4. Magnetic stu...

Spontaneous resolutions from an in situ reaction especially for a Sharpless reaction are really rare. Here we display a new pair of enantiomeric compounds Δ- and Λ-[Mn(4-tzba)(bpy)2·H2O](bpy)·3H2O (labeled as Δ-1 and Λ-1 respectively) (4-tzba = 4-tetrazolbenzoic acid; bpy = 2,2′-bipyridine) from a Sharpless reaction. They crystallized in the P212121 chiral space group and demonstrated strong second harmonic generation (SHG) responses and red photoluminescence property. The chiral metal conformations were captured by the introduction of the distorted bpy and the in situ synthesized 4-tzba ligands. The hydrogen bonds connecting the 4-tzba and central metal play a crucial role in the chirality transmission, as well as the donor–acceptor type SHG nonlinear response.

Hydrothermal reactions of Fe III or Co II ion with dimethyl methylsulfonomethanephosphonate afforded two novel layered transition metal phosphonates containing oxo-bridging hydroxides (H 2 O or OH - ) as coligands, namely, [Fe(L)-(OH)(H 2 O)] (1) and [Co 4 (L) 4 (H 2 O) 4 ]·2H 2 O (2) (H 2 L CH 3 SO 2 CH 2 PO 3 H 2 ), Magnetic property studies reveal that spin-canting and metamagnetic behaviors coexist in complex 2 with a T c of 7.0 K.