Poly[[{μ-5-[(di-methyl-amino)(thioxo)meth-oxy]benzene-1,3-di-carboxyl-ato-κ , : , }(μ4,4'-di-pyridyl-amine-κ : )cobalt(II)] di-methyl-formamide hemisolvate monohydrate].

In the crystal structure of the title compound, {[Co(CHNSO)(CHN)]0.5CHNO·HO} or {[Co(dmtb)(dpa)]·0.5DMF·HO} (dmtb = 5-[(di-meth-yl-amino)-thioxometh-oxy]-1,3-benzene-dicarboxyl-ate and dpa = 4,4'-di-pyridyl-amine), an assembly of periodic [Co(CHNSO)(CHN)] layers extending parallel to the plane is present.

Corrigendum: Improving yields by switching central metal ions in porphyrazine-catalyzed oxidation of glucose into value-added organic acids with SnO in aqueous solution.

[This corrects the article DOI: 10.3389/fchem.2023.

Improving yields by switching central metal ions in porphyrazine-catalyzed oxidation of glucose into value-added organic acids with SnO in aqueous solution.

Photocatalysis has exhibited huge potential in selective conversion of glucose into value-added chemicals. Therefore, modulation of photocatalytic material for selective upgrading of glucose is significant. Here, we have investigated the insertion of different central metal ions, Fe, Co, Mn, and Zn, into porphyrazine loading with SnO for access to more efficient transformation of glucose into value-added organic acids in aqueous solution at mild reaction conditions.

Bis(pyridine-2-carboxyl-ato-κ ,)copper(II)]-benzene-1,3,5-tri-carb-oxy-lic acid-water (1/2/2).

In the title complex, [Cu(CHON)]·2CHO·2HO, the Cu ion lies on a center of inversion and coordinates with symmetry related pyridine nitro-gen and carboxyl oxygen atoms from two pyridine-2-carb-oxy-lic acid anions, giving rise to a square-planar coordination geometry. There are weak axial bonds between Cu and an O atom of a symmetry-related trimesic acid moieties [Cu⋯O = 2.837 (2) Å] The Cu⋯O weak inter-actions and hydrogen bonds stabilize the whole structure.

A highly sensitive and selective colorimetric probe based on a cycloruthenated complex: an Hg-promoted switch of thiophene coordination.

A cyclometalated ruthenium complex [Ru(pthb)(bpy)2]+ (1, bpy = 2,2'-bipyridine, Hpthb = 3,3-dimethyl-2-(5-pyridylthiophen-2-yl)vinyl-benzo[e]indolium-1-propylsulfonate) could be converted from a C-coordinated structure to non-metallated species with N,S-bonded Hpthb upon treatment with mercury(ii) ions in water. Strikingly, the switch in the coordination mode resulted in a great absorption change along with a change in the solution color of 1 from dark red to light yellow. Therefore, 1 can be used as a colorimetric probe to detect mercury(ii) ions by the naked eye.

Synergistic photocatalytic performance of cobalt tetra(2-hydroxymethyl-1,4-dithiin)porphyrazine loaded on zinc oxide nanoparticles.

A new ZnO/CoPz(hmdtn) composite as a highly efficient photocatalyst was successfully prepared by cobalt tetra(2-hydroxymethyl-1,4-dithiin)porphyrazine (CoPz(hmdtn)) impregnated onto the surface of ZnO nanoparticles, the photocatalytic performance of ZnO/CoPz(hmdtn) under both simulated sunlight and visible light (λ ≥ 400 nm) irradiation was assessed by degradation of Rhodamine B (RhB) and phenol in aerated conditions. The ZnO/CoPz(hmdtn) manifested much higher photocatalytic activity than pure ZnO and pure CoPz(hmdtn), originating from the synergistic effect between CoPz(hmdtn) and ZnO. Furthermore, the XPS analysis revealed that there may be strong interaction between CoPz(hmdtn) and ZnO.

Crystal structure of a heterometallic coordination polymer: -poly[[[tetra-aqua-cobalt(II)]-μ-pyridine-2,6-di-carboxyl-ato-calcium(II)-μ-pyridine-2,6-di-carboxyl-ato] dihydrate].

In the crystal of the title polymeric complex, {[CoCa(CHNO)(HO)]·2HO} (), the Co ion is ,,'-chelated by two pyridine-2,6-di-carboxyl-ate anions in a distorted NO octa-hedral geometry, and two carboxyl-ate O atoms of pyridine-2,6-di-carboxyl-ate anions bridge tetra-aqua-calcium(II) units to form polymeric chains propagating along the -axis direction. In the crystal, O-H⋯O and C-H⋯O hydrogen bonds, and offset π-π stacking inter-actions [inter-centroid distances = 3.551 (1) and 3.

Selective oxidation of benzyl alcohols to benzoic acid catalyzed by eco-friendly cobalt thioporphyrazine catalyst supported on silica-coated magnetic nanospheres.

A novel magnetically recoverable thioporphyrazine catalyst (CoPz(S-Bu)/SiO@FeO) was prepared by immobilization of the cobalt octkis(butylthio) porphyrazine complex (CoPz(S-Bu)) on silica-coated magnetic nanospheres (SiO@FeO). The composite CoPz(S-Bu)/SiO@FeO appeared to be an active catalyst in the oxidation of benzyl alcohol in aqueous solution using hydrogen peroxide (HO) as oxidant under Xe-lamp irradiation, with 36.4% conversion of benzyl alcohol, about 99% selectivity for benzoic acid and turnover number (TON) of 61.

Selective Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid Using O and a Photocatalyst of Co-thioporphyrazine Bonded to g-CN.

Selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is one of the key reactions for producing chemical commodities from biomass and their derivatives. The challenge for this reaction is to develop an efficient catalytic process that can be conducted under mild conditions (room temperature and atmospheric pressure, using oxygen molecules in air as the oxidant) and a recyclable catalyst. Herein we report a photocatalyst of cobalt thioporphyrazine (CoPz) dispersed on g-CN (abbreviated as CoPz/g-CN), which exhibits excellent catalytic activity toward the selective oxidation of HMF into FDCA under simulated sunlight using oxygen molecules in air as a benign oxidant.

Crystal structure of a heterometallic coordination polymer: poly[di-aqua-bis-(μ-benzene-1,3,5-tri-carboxyl-ato)dicalcium(II)copper(II)].

In the title complex, [CaCu(CHO)(HO)] , the Ca and Cu cations are bridged by the benzene-1,3,5-tri-carboxyl-ate anions (BTC) to form the coordination polymer, in which each BTC anion bridges two Cu and five Ca cations with a μ coordination mode. The Cu cation, located at an inversion centre, is in a nearly square-planar geometry defined by four O atoms from four bridging BTC anions, while the Ca cation is in a distorted octa-hedral geometry defined by five O atoms from bridging BTC anions and one water mol-ecule. O-H⋯O hydrogen bonds between coordinating water mol-ecules and carboxyl groups further stabilize the structure; π-π stacking is also observed between parallel benzene rings, the centroid-to-centroid distance being 3.

Metal-Organic Frameworks Constructed from a New Thiophene-Functionalized Dicarboxylate: Luminescence Sensing and Pesticide Removal.

A family of thiophene-based metal-organic frameworks (MOFs), [Zn(L)(BBI)·(HO)] (1) (BBI = 1,1'-(1,4-butanediyl)bis(imidazole)) and [Cd(L)(TPOM)]·xS (2) (TPOM = tetrakis(4-pyridyloxy-methylene) methane, S represents noncoordinated solvent molecules) was constructed by employing a new linear thiophene-functionalized dicarboxylic acid (benzo-(1,2;4,5)-bis(thiophene-2'-carboxylic acid, HL) to assemble with d ions in the presence of a flexible ancillary ligand under solvothermal conditions, which exhibit diverse structures. Most strikingly, both compounds 1 and 2 could be efficient luminescent sensory materials that are highly selective and sensitive to environmental contaminants, especially for Hg(II), Cu(II), Cr(VI), and salicylaldehyde, and yet remain unaffected by other molecules that may coexit. Furthermore, this is the first report on MOF-based sensors capable of recyclable detection of Hg(II), Cr(VI), and salicylaldehyde so far.

μ-N (1),N (2)-Bis(pyridin-2-yl)hydrazine-1,2-dicarbothio-amidato]bis-[chlorido-copper(II).

The binuclear title compound, [Cu2(C12H10N6S2)Cl2], possesses twofold rotational symmetry. The Cu(II) atom occupies a four-coordinate pseudo-tetra-hedral environment bound to one S atom, one imine N atom and one pyridine N atom from the N(1),N(2)-bis-(pyridin-2-yl)hydrazine-1,2-dicarbo-thio-amidate ligand, and one Cl(-) anion. The metal atoms are connected via the bis-tridentate ligand into a binuclear structure.

Extending the bandwidth of reverse saturable absorption in platinum complexes using two-photon-initiated excited-state absorption.

Pt(II) complexes bearing 4-(7-(benzothiazol-2'-yl)-9,9-diethylfluoren-2-yl)-2,2':6',2″-terpyridine or 4-(7-(benzothiazol-2'-yl)-9,9-diethylfluoren-2-yl)ethynyl-2,2':6',2″-terpyridine ligand exhibit strong reverse saturable absorption in the visible spectral region and large two-photon initiated excited-state absorption in the near-IR region. They are promising broadband nonlinear absorbing materials from the visible to the near-IR region. The extended π-conjugation in complex 2 that has a C≡C linker between the terpyridine ligand and the 4-(7-(benzothiazol-2'-yl)-9,9-diethylfluoren-2-yl) substituent significantly increases the two-photon absorption cross sections (σ(2)), making it among the strongest of two-photon absorbing Pt(II) complexes.

Synthesis, structural characterization, photophysics, and broadband nonlinear absorption of a platinum(II) complex with the 6-(7-benzothiazol-2'-yl-9,9-diethyl-9 H-fluoren-2-yl)-2,2'-bipyridinyl ligand.

A platinum complex with the 6-(7-benzothiazol-2'-yl-9,9-diethyl-9H-fluoren-2-yl)-2,2'-bipyridinyl ligand (1) was synthesized and the crystal structure was determined. UV/Vis absorption, emission, and transient difference absorption of 1 were systematically investigated. DFT calculations were carried out on 1 to characterize the electronic ground state and aid in the understanding of the nature of low-lying excited electronic states.

Synthesis and photophysics of platinum(II) 6-phenyl-4-(9,9-dihexylfluoren-2-yl)-2,2'-bipyridine complexes with phenothiazinyl acetylide ligand.

Two platinum 6-phenyl-4-(9,9-dihexylfluoren-2-yl)-2,2'-bipyridine complexes (4 and 5) with phenothiazinyl acetylide ligand were synthesized and characterized. Their UV-vis absorption and emission characteristics in solution and in Langmuir-Blodgett (LB) film were systematically investigated. The triplet transient difference absorption and nonlinear absorption properties were also studied for these complexes.

A new chiral N-heterocyclic carbene silver(I) cylinder: synthesis, crystal structure and catalytic properties.

A new chiral cyclic triimidazoline salt and its chiral N-heterocyclic carbene trisilver(I) cylinder-like cage was prepared via self-assembly, with size-selective catalytic performance for the cyanosilylation of several Schiff-base compounds.

Excited-state absorption of a bipyridyl platinum(II) complex with alkynyl-benzothiazolylfluorene units.

The singlet excited-state lifetime of a bipyridyl platinum(II) complex containing two alkynyl-benzothiazolylfluorene units was determined to be 145+/-105 ps by fitting femtosecond transient difference absorption data, and the triplet quantum yield was measured to be 0.14. A ground-state absorption cross section of 6.

Acid-sensitive Pt(II) 2,6-di(pyridin-2-yl)pyrimidin-4(1H)-one complexes.

Three Pt(II) 2,6-di(pyridin-2-yl)pyrimidin-4(1H)-one complexes (2-4) with chloride or 4-ethynyltolyl ancillary ligands were synthesized and characterized. The photophysical properties of 2-4 were investigated in different solvents and at different acid concentrations. Their electronic absorption and emission responses at various acid concentrations were compared to those of 5.

Excited-state absorption in a terpyridyl platinum(II) pentynyl complex.

The singlet excited-state lifetime of a terpyridyl platinum(II) pentynyl complex was determined to be 268+/-87 ps by fitting femtosecond transient absorption data, the triplet excited-state lifetime was found to be 62 ns by fitting nanosecond transient absorption decay data, and the triplet quantum yield was measured to be 0.16. A ground-state absorption cross section of 2.

A highly selective chromo- and fluorogenic dual responding fluoride sensor: naked-eye detection of F- ion in natural water via a test paper.

A highly selective and sensitive chromogenic and fluorogenic dual signal responding fluoride-sensor 1, comprising a Ru-bipy fluorophore (bipy = 2,2'-bipyridine) and a 2,4-dinitrophenylhydrazone chromophore was prepared and spectroscopically characterized. Uv-vis titrations with F- revealed the appearance of a new intense absorption band centered at about 580 nm which was accompanied by a dramatic change in color from yellow to magenta, with the association constant logK being 6.71 +/- 0.

Chiral aggregation and spontaneous resolution of thiosemicarbazone metal complexes.

Chiral aggregation and spontaneous resolution of thiosemicarbazone metal complexes MnL2 (1 and 1') (HL = acetylpyrazine thiosemicarbazone) were achieved through cooperation of hydrogen bonding and pi-pi stacking interactions. Compound 1 crystallized in a chiral space group P4(1)2(1)2 and the molecules exhibited lambda-configuration. Head-to-tail pyrazine-amino hydrogen bonding linked the molecules together presenting a two-dimensional homochiral sheet.

Host-guest complexation of a fluorescent and electrochemical chemsensor for fluoride anion.

Host-guest complexation of a ferrocenenylphalene dyad 1, 1,1'-diaceylferrocenyl-3-hydroxyl-2-naphthoylhydrazone, as a fluorescent and electrochemical chemosensor for fluoride anion, was investigated. Crystal structure analysis revealed that the two naphthyl arms of compound 1 positioned in the same side about the ferrocene moiety and interacted through pi-pi stacking interactions. The intermolecular pi-pi stacking interactions and the C-H.

Naked-eye detection of fluoride ion in water: a remarkably selective easy-to-prepare test paper.

A test paper for high-selectivity detecting fluoride ion in natural aqueous environments without any spectroscopic instrumentation was achieved by using Ru-bipy based quinonehydrazone as a chromo- and fluorogenic hybrid chemosensor.

Heterometallic compounds assembled from ferrocene-containing bisthiosemicarbazone clips.

Heteropolynuclear organometallic compounds have been constructed by using the ferrocene-based ligand H(2)L, [NH(2)SCNHN=C(CH(3))(C(5)H(4))](2)Fe. Reaction of the ligand H(2)L with the cobalt(II) salt gave a tetranuclear helicate Co(2)Fe(2) (1) with two ferrocene-based clips wrapped around the two cobalt atoms. The chiral helicates recognized the neighbors with same chirality through intermolecular hydrogen bonding between the thiosemicarbazone moieties to form a one-dimensional chiral channel.

Imidazolidinium-based robust crypt with unique selectivity for fluoride anion.

A new imidazolidinium based receptor exhibiting unique affinity and high selectivity for fluoride anion through steric requirements and the cooperativity of multiple intramolecular binding, has been designed, synthesized and structurally characterized.