The synthesis of graphdiyne with an ordered internal structure is highly attractive for its various scientific and application investigations. We reported herein a rational method to fabricate a graphdiyne analogue with the help of supramolecular chemistry. The introduction of π−π/CH−π interactions controlled the conformations of the precursors and afforded multilayer graphdiyne analogue Ben-GDY through the wet chemical method. The in-plane periodicity of the multilayer Ben-GDY was corroborated by transmission electron microscopy and selected area electron diffraction, which showed a pattern well matched with ABC-style stacking.
Four seven-nuclearity 3d-4f heterometallic cluster {FeLnO} substituted polyoxometalates (HPz)KFeLn(μ-O)(B-α-GeWO)(GeWO)· xHO (1-Ln, Pz = piperazine, Ln = Tb, Dy, Ho, Er for x = 27, 25, 25, 24, respectively) have been hydrothermally prepared and structurally characterized by single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectrometry, thermogravimetric analyses, elemental analyses, and electrospray ionization mass spectrometry. Single-crystal X-ray diffraction analyses revealed that 1-Ln contain an unprecedented banana-shaped polyanion constructed from an iron-lanthanide heterometallic {FeLnO} cluster, two trilacunary {B-α-GeWO} units, and one hexalacunary {GeWO} fragment. The magnetic susceptibility surveying proved the presence of antiferromagnetic coupling in 1-Ln.
A helical fiber-like structure from a three dimensional arrangement of an alkyne exhibits good ability for photocatalytic hydrogen generation using a Pt co-catalyst.
Two pyridyl functionalized aromatic carboxylic acids HL1 (4, 4′-[[3,5-bis(4-pyridinyl)phenyl]imino]mono-[benzoic acid]) and H 2 L2 (4,4′-[[3,5bis(4-pyridinyl)phenyl]imino]bis-[benzoic acid]) were designed as linkers for construction of aggregation-induced emission active coordination polymers. Two complexes decorated with open Lewis basic pyridyl active sites have been successfully synthesized by using organic linker precursors. Complex 1, with the formula as Eu 2 (L1) 6 (H 2 O) 4 •3DMF, is constructed by one-dimensional infinite chains. Complex 2, with the formula as Eu 2 (L2) 2 (HCOO) 2 (H 2 O) 4 •H 2 O, possesses a (2,6)-connected three-dimensional framework. Fluorescence studies revealed that both 1 and 2 can quickly detect 4-nitrophenol (4-NP) in dimethylformamide (DMF) and Fe 3+ ions in H 2 O through luminescence quenching. In comparison, complex 1 exhibits higher sensitivity and selectivity toward 4-NP and Fe 3+ than those of 2. The synergistic competitive absorption and electrostatic interaction mechanism can explain the detection of 4-NP, and the selectivity of Fe 3+ can be attributed to the synergistic effect of competitive absorption and coordination interactions between Fe 3+ ions and pyridine N atoms. In addition, complex 2 can be excited at a long excitation wavelength of 380 nm, which is almost in the visible region. This is an important requirement for its application.
By introduction of trilacunary Keggin-type polyoxometalate to the hydrothermal reaction system of Cr3+, Ln3+ and phthalic acid, a series of novel {Cr4Ln4} heterometallic clusters have been obtained.
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