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Abstract Different structures and different Ag+-response behaviors of a pair of pyrene-based S-containing atropisomers, namely s -BSPPy and a -BSPPy , have been investigated. The calculated high rotation barrier indicates that the two atropisomers are non-interconvertible. In polar solvents, s -BSPPy exhibits excimer emission but a -BSPPy does not. Based on the X-ray structures and the DFT calculated intermolecular interactions, the excimer of s -BSPPy is suggested to take a non-parallel edge-to-face λ -shaped geometry. Especially, s -BSPPy exhibits ratiometric excimer-off and monomer-on emission as a unique response to Ag+ in solutions, while no ratiometric Ag+-response was observed for a -BSPPy. Graphical abstract Unlabelled Image Highlights • In solution, s -BSPPy exhibits excimer emission, a -BSPPy does not. • Edge-to-face λ -shaped excimer of s -BSPPy. • s -BSPPy shows excimer-to-monomer emission in response to Ag+, a -BSPPy does not. • s -BSPPy and a -BSPPy atropisomers are non-interconvertible. [ABSTRACT FROM AUTHOR]

Abstract: Three 3D Ln(III)–Zn(II) 3d-4f heterometallic coordination polymers (HCPs) constructed from the coligands 3-amino-1H-1,2,4-triazole and oxalate, {[Ln2Zn19(atz)18(ox)9(Cl)8]·17H2O}n(Ln=Eu 1, Gd 2, Tb 3, Hatz=3-amino-1H-1,2,4-triazole, ox=oxalic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, FT-IR, TG analysis and X-ray diffraction. X-ray diffraction analysis reveals that these complexes are isostructural and feature 3D pillar-layered coordination frameworks constructed by the linkages of 2D layers and 1D zigzag chains, possessing a 5-nodal net topology with Schläfli symbol of {32;52;62}3{33;44;57;65;72}6{33;45;55;6;7}6{36;415;56;6}2{53}4. In addition, the magnetic property of 2 and the luminescence properties of 1 and 3 were also investigated. [Copyright &y& Elsevier]

Abstract: A series of Ln(III)-Ag(I) 4d–4f heterometallic coordination polymers [LnAg(oba)2(H2O)]n (Ln=Dy 1, Ho 2, Er 3) have been synthesized under hydrothermal reactions of 4,4′-oxybis(benzoicacid) (H2oba) with Ln(NO3)3 ·6H2O and AgNO3 at 180°C. All complexes are isostructural with 3D networks expanded from 1D zigzag chains and 2D layers. In addition, the luminescent property of compound 1 was investigated in the solid-state at room temperature. [Copyright &y& Elsevier]

Abstract: Two different types of novel lanthanide coordination polymers constructed from 5-nitroisophthalic acid, and picolinic acid as auxiliary ligand, namely, {[Ln2(nip)2(pic)2(H2O)]}n (type I, Ln=Pr 1, Nd 2, Sm 3, Eu 4, and H2nip=5-nitroisophthalic acid, Hpic=picolinic acid), and {[Ln4(nip)5(pic)2(H2O)2]·2H2O}n (type II, Ln=Tb 5, Dy 6, Ho 7, Er 8), have been hydrothermally synthesized and characterized by IR, elemental analysis, thermogravimetric analysis (TGA), single-crystal X-ray diffraction analyses and powder X-ray diffraction (PXRD). Complexes 1–4 (type I) are isostructural and the infinite 1D Sm-carboxylate chains are bridged by pia ligands to form 2D sheets, such sheets are further united together to generate a 3D supramolecular structure. Complexes 5–8 (type II) are isostructural and the infinite 1D Tb–carboxylate chains are bridged by pia ligands to form 2D sheets, such sheets are further united together to generate a 3D supramolecular structure. Furthermore, the luminescence properties of compounds 4 and 5 have also been studied. [Copyright &y& Elsevier]

In this work, we obtained a highly rare three-dimensional Zn(II) MOF, namely [Zn2(BTC)2(L)][(Me2NH2)2]·DMF (BTC3− =1,3,5-benzenetricarboxylate, L=N1,N4-bis(pyridin-3-ylmethyl)cyclohexane-1,4-dicarboxamide), and Me2NH2 =dimethylamine cation) by solvo(hydro)thermal method. This polymer was characterized by single-crystal X-ray diffraction, thermogravimetry and solid-state luminescence analysis. The outstanding structural feature of it is (3, 4)-connected net with unprecedented (6·82)(6·85)(62 ·10)(62 ·83 ·10) topology and self-penetrating motif. [ABSTRACT FROM AUTHOR]

Abstract: Four novel functional supramolecular metal–organic coordination polymers, [Cd2Cl3(IP)2(NIPH)2](1), [Zn2(IP)2(μ2-SO4)2(NIPH)2]·2H2O(2), [Cd(IP)2(BPDC)](3), [Zn2(IP)2(NDC)2](4) (IP=1-H-imidazo[4,5-f][1,10]-phenanthroline, H2NIPH=5-nitro-isophthalic acid, H2BPDC=4,4′-biphenyldicarboxylic acid, H2NDC=2,6-naphthalenedicarboxylic acid), have been obtained through three types of dicarboxylate linkers. All the four compounds are extended into a 3-D supramolecular framework by hydrogen bonds or weak aromatic interactions. The different structures demonstrate the effect of the dicarboxylate ligands on the formation of such coordination architectures. Compound 1 is a 1-D double-stranded loop-like chain with repeated [Cd4(Cl)4]4+ units connected by H2NIPH ligands. In compound 2, there are two indie 1D zigzag chains jointed by sulfate anions with μ2-bridging mode. With different metal centers, compounds 1 and 2 hold different crystal structures. With different auxiliary dicarboxylate ligands, compounds 3 and 4 exhibit disparate 1D chains. The fluorescence property and thermal stability of all complexes are also investigated. [Copyright &y& Elsevier]

Two kinds of three-dimensional (3D) coordination frameworks from monometallic to heterometallic, including a charming 3D monometallic complex, namely, [Eu2(mpda)3(H2O)4]n (1) and the first series of novel 3D heterometallic 4d-4f coordination frameworks based on 2,6-dimethylpyridine-3,5-dicarboxylic acid, namely, [Ln2Cd2(mpda)2(bdc)2(SO4)2(H2O)6]n [Ln=Sm(2), Eu(3), Gd(4), Tb(5), Dy(6); mpda=2,6-dimethylpyridine-3,5-dicarboxylic acid; bdc=1,4-benzenedicarboxylic acid] have been successfully synthesized under hydrothermal conditions and structurally characterized. Crystal 1 is featured by its interesting 3D chain-layer construction which is formed by the alternative arrangement of chains and layers and exhibits 2-nodal 5, 6-connected 3D network with the Schlafli symbol of {33.43.55.64}{36.46.53}. Complexes 2-6 are isostructural and it reveals that these 3D heterometallic compounds are firstly built by H2mpda ligand. What is worth mentioning is that anionic ligand SO42− plays a crucial function in the construction building. The two-dimensional (2D) lanthanide-transition heterometallic bilayers [Ln2Cd2(mpda)2(bdc)2]n are pillared by SO42− subunits forming mixed-ligand complexes with a pillared-layer 3D structure. Complexes 2-6 feature 4-nodal 3, 4, 5, 6-connected 3D frameworks with {4.82}{4.84.10}{42.810.102.12}{42.88} topology. All the complexes are characterized by elemental analyses, FT-IR spectroscopy, Powder X-ray diffraction (PXRD) and thermogravimetric analyses (TGA). Furthermore, the luminescence properties of compounds 1, 3, and 5 and the magnetic properties of complexes 4 and 6 were also investigated in detail. [ABSTRACT FROM AUTHOR]

Abstract: The first example of 3D heterometallic 4d–4f 2,7-naphthanlenedisulfonate compounds [LnAg2(2,7-NDS)(IN)3] (Ln=Sm (1), Eu (2), Gd (3), Tb (4), Dy(5); 2,7-NDS=2,7-naphthanlenedisulfonate; IN=isonicotinic acid) has been synthesized via hydrothermal reaction and characterized by single crystal X-ray diffraction, elemental analyses, FT-IR spectroscopy, powder X-ray diffraction(PXRD) and thermogravimetric analyses (TGA). X-Ray structural analysis reveals that compounds 1–5 exhibit same well-organized 3D coordination frameworks that are built up by 2D elliptical cylinder shaped [LnAg2(2,7-NDS)(IN)3] layers which are constructed by 1D anionic chains [Ln(2,7-NDS)(IN)3]2− linking the adjacent Ag(I) ions, and [LnAg(μ2-O)2] units, possessing a 7-connected topology with the Schläfli symbol of {33;411;56;6}. Furthermore, the luminescence properties of compounds 2 and 4 and the magnetic properties of compounds 3 and 5 were investigated. [Copyright &y& Elsevier]

Abstract: Six novel functional metal–organic frameworks, namely, [CdCl(IP)(Hpydc)(H2O)]·2H2O (1), [Cd(IP)(H2imdc)]Cl (2), [Cd(IP)2(H2O)2](1,5-nds)·2H2O (3), [Co(IP)(H2O)4](1,5-nds)·H2O (4), [Zn(IP)(μ2-SO4)(H2O)]·H2O (5), [Zn(IP)(SO4)(H2O)3] (6) (IP = 1-H-imidazo[4,5-f][1,10]-phenanthroline, H2pydc = pyridine-2,6-dicarboxylic acid, H3imdc = imidazole-4,5-dicarboxylic acid, 1,5-nds = 1,5-naphthanlenedisulfonate), were synthesized by controlling auxiliary ligands, metal centers and solvents. In compound 1, Cd(II) is chelated by IP and Hpydc ligands, forming 0D→3D supramolecular structure. Compound 2 is a 1D chain with repeated [Cd(IP)]2+ units connected by H2imdc ligands. With different metal centers, compounds 3 and 4 possess different crystal structures. With solvents regulated, compounds 5 and 6 exhibit distinct structures. In compound 5, sulfate anions show μ2-bridging mode, which results in the formation of 1D chain. In compound 6, only one oxygen atom from sulfate anion coordinates to the metal center, resulting in discrete repeated units. The luminescent properties of 1, 2, 3, 5, 6 and thermal stabilities of all compounds were measured. [Copyright &y& Elsevier]

The microwave-assisted synthesis is generally much faster, cleaner, and more economical than the conventional methods. Here, dendritic crystals of AgBiS2 were synthesized in aqueous solution under microwave irradiation for 30 min. Powder X-ray diffraction (XRD) pattern indicates that the product is in the pure cubic phase. The product is also characterized by the techniques of transmission electron microscopy (TEM) and selected area electron diffraction (SAED). [Copyright &y& Elsevier]