A Eu(iii) metal-organic framework based on anthracenyl and alkynyl conjugation as a fluorescence probe for the selective monitoring of Fe3+ and TNP.

In this work, a luminescent metal-organic framework (Eu-MOF {[Eu6L6(µ3-OH)8(H2O)3]8·H2O} n ) was constructed by a solvothermal method with a linear organic ligand L (10-[(2-amino-4-carboxyl-phenyl)ethynyl]anthracene-9-carboxylic acid) based on anthracene and alkyne groups and using Eu3+ as the metal center. The MOF exhibits a stable UiO-66 crystal structure, and a six-core cluster twelve-linked secondary structural unit was successfully synthesized using 2-fluorobenzoic acid as a modulator, forming a classical fcu topology. Moreover, it exhibits good chemical stability. Interestingly, Eu-MOF exhibited high selectivity and sensitive fluorescence burst properties towards Fe3+ ions and 2,4,6-trinitrophenol (TNP) in DMF solution. For Fe3+, the K SV value is 5.06 × 105 M-1 and the LOD value is 5.1 × 10-7 M. For TNP, the K SV value is 1.92 × 104 M-1 and the LOD value is 1.93 × 10-6 M. In addition, Eu-MOF showed good anti-interference ability and fast response. This work provides an excellent fluorescent sensor for the detection of Fe3+ and 2,4,6-trinitrophenol (TNP) residues in contaminants.

Rapid and selective detection of biothiols by novel ruthenium(II) complex-based phosphorescence probes.

Considering the excellent photochemical properties of ruthenium(II) complexes, two new ruthenium(II) complexes, RuL1-DNBS and RuL2-DNBS, have been developed as phosphorescence probes for detection of biothiols in 100:1 (v/v) Hepes buffer (20 mM, pH = 7.2)/CH3CN solution. The response rate was highly improved of these two probes toward biothiols because the steric interactions between 1H-imidazo [4, 5-f] [1,10] phenanthroline group and ortho-2, 4-dinitrobenzensulfonate resulted in a relatively rapid thiol-induced SNAr substitution reaction. RuL1-DNBS and RuL2-DNBS were weakly phosphorescent owing to the effectual photoinduced electron transfer from ruthenium(II) luminophore to the sensing group, 2,4-dinitrobenzenesulfonyl. After reacting with biothiols, the 2,4-dinitrobenzenesulfonyl group of RuL1-DNBS and RuL2-DNBS were cleavaged and the RuL1 and RuL2 were obtained. Meanwhile, the phosphorescence were "turn-on". Both of these two probes can detect biothiols sensitively and selectively under physiological conditions with submicromolar detection limits. Furthermore, application of RuL2-DNBS for detecting of intracellular biothiols has been successfully performed in living Glioma cells.

Phenanthroline-based microporous organic polymer as a platform for an immobilized palladium catalyst for organic transformations.

Porous organic polymers have attracted significant attention owing to their large specific surface area, excellent chemical and thermal stability, and controllable skeletons. phenanthroline-based microporous organic polymer (Phen-MOP) has been synthesized via a cost-effective method based on the Scholl reaction. The Phen-MOP polymer exhibits high surface area and good stability. Owing to the phenanthroline skeleton embedding into the microporous polymer framework, the Phen-MOP can serve as a platform to support a transition metal catalyst. After being post-modified with palladium acetate, the synthesized Phen-Pd-MOP framework can serve as a highly efficient heterogeneous catalyst for the Suzuki-Miyaura coupling reaction and the Heck coupling reaction. Moreover, the Phen-Pd-MOP catalyst could be reused at least 10-12 times without any significant loss of the catalytic activity.

catena-Poly[[[tetraaqua(3,5-dinitro-4-oxidopyridine N-oxide-κO)neodymium(III)]-µ-oxalato-κO,O:O,O] tetrahydrate].

In the title coordination polymer, {[Nd(C(5)H(2)N(3)O(6))(C(2)O(4))(H(2)O)(4)]·4H(2)O}(n), the oxalate dianions link adjacent nine-coordinate, tricapped trigonal-prismatic Nd(III) atoms into a chain running along the b axis. The 3,5-dinitropyridin-4-oxido N-oxide ligand is formally a zwitterionic anion; the anion binds to the metal atom through the N-oxide O atom. The chains are connected into a three-dimensional network by O-H⋯O hydrogen bonds involving the coordinated and uncoordinated water mol-ecules.

Bis(µ-3-nitro-phthalato-κO:O)bis-[aqua-(2,2'-bipyridine-κN,N')copper(II)] dihydrate.

Two 3-nitro-phthalate dianions bridge two water-coordinated 2,2'-bipyridine-chelated Cu(II) atoms about a center of inversion to generate the title dinuclear compound, [Cu(2)(C(8)H(3)NO(6))(2)(C(10)H(8)N(2))(2)(H(2)O)(2)]·2H(2)O. The geometry of the Cu(II) atom is a distorted square pyramid. Adjacent mol-ecules are linked through the coordinated and solvent water mol-ecules to form a linear ribbon running along the a axis of the monoclinic unit cell.

1:1 Adducts of 2,2'-[isopropylidenebis(p-phenyleneoxy)]diacetic acid with dimethylammonium and 4,4'-bipyridine.

The title compounds, dimethylammonium 2-{4-[1-(4-carboxymethoxyphenyl)-1-methylethyl]phenoxy}acetate, C(2)H(8)N(+).C(19)H(19)O(6)(-), (I), and 2,2'-[isopropylidenebis(p-phenyleneoxy)]diacetic acid-4,4'-bipyridine (1/1), C(19)H(20)O(6).C(10)H(8)N(2), (II), are 1:1 adducts of 2,2'-[isopropylidenebis(p-phenyleneoxy)]diacetic acid (H(2)L) with dimethylammonium or 4,4'-bipyridine. The component ions in (I) are linked by N-H...O, O-H...O and C-H...O hydrogen bonds into continuous two-dimensional layers parallel to the (001) plane. Adjacent layers are stacked via C-H...O hydrogen bonds into a three-dimensional network with an -ABAB- alternation of the two-dimensional layers. In (II), two H(2)L molecules, one bipy molecule and two half bipy molecules are linked by O-H...N hydrogen bonds into one-dimensional chains and rectanglar-shaped rings. They are assembled via pi-pi stacking interactions and C-H...O hydrogen bonds into an intriguing zero-dimensional plus one-dimensional poly(pseudo)rotaxane motif.

Chlorido(5-formyl-2-hydroxy-phenyl-κC)mercury(II).

In the planar (r.m.s. deviation = 0.027 Å) title compound, [Hg(C(7)H(5)O(2))Cl], the Hg(II) atom shows a typical linear coordination by a C atom of the benzene ring and a Cl atom. Inter-molecular O-H⋯O hydrogen bonds are present in the crystal structure, resulting in chains propagating along the b axis. The crystal studied was a non-merohedral twin, with a twin ratio of 0.802 (2):0.198 (2).

catena-Poly[[[bis-(4-methyl-benzoato-κO,O')zinc(II)]-µ-4,4'-bipyridine-κN:N'] tetra-hydrate].

The asymmetric unit of the title compound, {[Zn(C(7)H(7)O(2))(2)(C(10)H(8)N(2))]·4H(2)O}(n), contains a highly distorted octa-hedral Zn(II) metal center strongly coordinated by two N atoms of two 4,4'-bipyridine (4,4'-bipy) ligands and chelated by two 4-methyl-benzoate anions. The crystallographic inversion center and glide plane present at the center of the C-C single bond of 4,4'-bipy, along with the cis coordination motif of the 4,4'-bipy, lead to one-dimensional zigzag chains. There are a large number of water mol-ecules in the crystal structure, which also form one-dimensional chains through O-H⋯O hydrogen bonds.