CuAAC-based assembly and characterization of a ruthenium–copper dyad containing a diimine–dioxime ligand framework

The design of molecular dyads combining a light-harvesting unit with an electroactive centre is highly demanded in the field of artificial photosynthesis. The versatile Copper-catalyzed Azide–Alkyne Cycloaddition (CuAAC) procedure was employed to assemble a ruthenium tris-diimine unit to an unprecedented azide-substituted copper diimine–dioxime moiety. The resulting RuIICuII dyad 4 was characterized by electrochemistry, 1H NMR, EPR, UV-visible absorption, steady-state fluorescence and transient absorption spectroscopies. Photoinduced electron transfer from the ruthenium to the copper centre upon light-activation in the presence of a sacrificial electron donor was established thanks to EPR-monitored photolysis experiments, opening interesting perspectives for photocatalytic applications.

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Water-soluble β-aminobisulfonate building blocks for pH and Cu2+ indicators

RSC Advances ◽

10.1039/c6ra17791c ◽

2016 ◽

Vol 6 (88) ◽

pp. 84712-84721 ◽

Cited By ~ 5

Author(s):

Maria A. Cardona ◽

Marina Kveder ◽

Ulrich Baisch ◽

Michael R. Probert ◽

David C. Magri

Keyword(s):

Nmr Spectroscopy ◽

Building Blocks ◽

Water Soluble ◽

Visible Absorption ◽

H Nmr ◽

Uv Visible

Two phenyl β-aminobisulfonate ligands characterised by UV-visible absorption, EPR and 1H NMR spectroscopy exhibit evidence for binding with Cu2+ in water and methanol.

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Synthesis of Fluorescent Magnetic and Plasmonic-Hybrid Multifunctional Nanopaticles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1081.161 ◽

2014 ◽

Vol 1081 ◽

pp. 161-164

Author(s):

Xue Mei Li ◽

Zheng Guan ◽

Hong Ling Liu ◽

Jun Hua Wu ◽

Xian Hong Wang ◽

...

Keyword(s):

Ethylene Glycol ◽

Zno Nanoparticles ◽

Poly Ethylene Glycol ◽

Visible Absorption ◽

Transmission Electron ◽

Good Magnetic Property ◽

Uv Visible ◽

Poly Ethylene ◽

Poly Propylene

FeAu/ZnO nanoparticles were successfully synthesized by nanoemulsion process with the use of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) as the surfactant. The characterization of the FeAu/ZnO nanoparticles was performed using X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy, showing that the polymer-laced nanoparticles reveal high crystallinity, excellent dispersibility and well defined optical performance. The process of solvent dispersion-collection of FeAu/ZnO nanoparticles indicates that the nanoparticles possess good magnetic property for applications.

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Photophysical, NMR studies of encapsulation of 2-cyano-6-hydroxy benzothiazole in p-sulfonatocalix[6]arene and its biological applications

The Analyst ◽

10.1039/d1an00770j ◽

2021 ◽

Author(s):

Ankita Shivaji Jadhav ◽

Ashvini Ulhas Chaudhari ◽

Kisan M Kodam ◽

Dipalee Dileep Malkhede

Keyword(s):

Steady State ◽

Fluorescence Spectroscopy ◽

Aqueous Medium ◽

Biological Applications ◽

Nmr Studies ◽

Visible Absorption ◽

Steady State Fluorescence ◽

Uv Visible ◽

Steady State Fluorescence Spectroscopy ◽

Visible Absorption Spectroscopy

This work deals with the study of interaction between 2-cyano-6-hydroxy benzothiazole (CHBT) and p-sulfonatocalix[6]arene (SCX6) at different pHs in aqueous medium by UV-visible absorption spectroscopy, and steady-state fluorescence spectroscopy. The...

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Synthesis and spectral properties of ruthenium(II) complexes with tetra-15-crown-5-phthalocyanine and N-donor ligands

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424603000987 ◽

2003 ◽

Vol 07 (12) ◽

pp. 795-800 ◽

Cited By ~ 22

Author(s):

Yuliya G. Gorbunova ◽

Yuliya Yu. Enakieva ◽

Sergey G. Sakharov ◽

Aslan Yu. Tsivadze

Keyword(s):

Spectral Properties ◽

Donor Ligands ◽

Preparation Technique ◽

Reaction Products ◽

H Nmr ◽

Trimethylamine Oxide ◽

Donor Solvent ◽

Ft Ir ◽

Uv Visible

The synthesis of novel bis-axially coordinated ruthenium(II) complexes with tetra-15-crown-5-phthalocyanine and N-donor ligands ( R 4 Pc ) Ru ( L 2) ( R 4Pc2- = 4,5,4',5',4'',5'', 4''',5'''- tetrakis(1,4,7,10,13-pentaoxotridecamethylene)phthalocyaninate-ion, L = pyridine (py), isoquino-line (iqnl), triethylamine ( Et 3 N )) is reported. The preparation technique involves the interaction of ( R 4 Pc ) Ru ( CO )( CH 3 OH ) with trimethylamine oxide in an N-donor solvent. The advantage of this method consists in selective carbonyl ejection from ( R 4 Pc ) Ru ( CO ) X with simultaneous substi-tution by N-donor ligands. The application of this procedure allowed us to decrease essentially the reaction time, as compared with photochemical methods, as well as to increase substantially the yield of reaction products. UV-visible, 1 H NMR, FT-IR and mass-spectrometry were used for characterization of the obtained compounds.

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Novel acridine-based thiosemicarbazones as ‘turn-on' chemosensors for selective recognition of fluoride anion: a spectroscopic and theoretical study

Royal Society Open Science ◽

10.1098/rsos.180646 ◽

2018 ◽

Vol 5 (7) ◽

pp. 180646 ◽

Cited By ~ 10

Author(s):

Ibanga Okon Isaac ◽

Iqra Munir ◽

Mariya al-Rashida ◽

Syed Abid Ali ◽

Zahid Shafiq ◽

...

Keyword(s):

Density Functional ◽

Theoretical Study ◽

Fluoride Anion ◽

Metal Fluoride ◽

Visible Absorption ◽

Functional Theory ◽

H Nmr ◽

Tetrabutylammonium Fluoride ◽

Uv Visible ◽

Nickel Fluoride

New thiosemicarbazide-linked acridines 3a–c were prepared and investigated as chemosensors for the detection of biologically and environmentally important anions. The compounds 3a–c were found selective for fluoride (F − ) with no affinity for other anions, i.e. − OAc, Br − , I − , HSO 4 − , SO 4 2− , PO 4 3− , ClO 3 − , ClO 4 − , CN − and SCN − . Further, upon the gradual addition of a fluoride anion (F − ) source (tetrabutylammonium fluoride), a well-defined change in colour of the solution of probes 3a–c was observed. The anion-sensing process was studied in detail via UV–visible absorption, fluorescence and 1 H-NMR experiments. Moreover, during the synthesis of acridine probes 3a–c nickel fluoride (NiF 2 ), a rarely explored transition metal fluoride salt, was used as the catalyst. Theoretical studies via density functional theory were also carried out to further investigate the sensing and anion (F − ) selectivity pattern of these probes.

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Synthesis and Electrochemistry of Aluminum Porphycenes: Crystal and Molecular Structure of Methyl-σ-Bonded Aluminum Etioporphycene

Journal of Porphyrins and Phthalocyanines ◽

10.1002/(sici)1099-1409(199704)1:2<109::aid-jpp13>3.0.co;2-4 ◽

1997 ◽

Vol 01 (02) ◽

pp. 109-119 ◽

Cited By ~ 3

Author(s):

ROGER GUILARD ◽

VIRGINIE PICHON-PESME ◽

HASSANE LACHEKAR ◽

CLAUDE LECOMTE ◽

ALLY M. AUKAULOO ◽

...

Keyword(s):

Molecular Structure ◽

Crystal And Molecular Structure ◽

Structural Data ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

X Ray ◽

H Nmr ◽

Axial Ligands ◽

Uv Visible

The synthesis and characterization of three monomeric aluminum porphycenes with anionic or σ-bonded axial ligands is reported. The investigated compounds are represented as ( EtioPc ) Al ( CH 3) and ( EtioPc ) AlX where EtioPc represents the dianion of etioporphycene and X = Cl − or OH −. Each synthesized complex was characterized by mass spectrometry. 1 H NMR, IR and UV-visible spectroscopies as well as by electrochemistry. Comparisons are made between the properties of complexes in the aluminum etioporphycene series and related chloro- or methyl σ-bonded Al ( III ) porphyrins containing octaethylporphyrin ( OEP ) or tetraphenylporphyrin ( TPP ) macrocycles. Comparisons are also made between the currently investigated compounds and a previously reported Al ( III ) μ-oxo dimer, [( EtioPc ) Al ]2 O . In addition, the crystal and molecular structure of ( EtioPc ) Al ( CH 3) was determined by X-ray diffraction. The molecular structure of this methyl-σ-bonded aluminum etioporphycene provides the first structural data for an aluminum porphycene compound. The aluminum(III) atom in ( EtioPc ) Al ( CH 3) is pentacoordinated and is located 0.54 Å from the plane of the four N -nitrogens.

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Synthesis of BiF3 and BiF3-Added Plaster of Paris Composites for Photocatalytic Applications

Energies ◽

10.3390/en14165159 ◽

2021 ◽

Vol 14 (16) ◽

pp. 5159

Author(s):

V. P. Singh ◽

Mirgender Kumar ◽

Moolchand Sharma ◽

Deepika Mishra ◽

Kwang-Su Seong ◽

...

Keyword(s):

Photocatalytic Performance ◽

Uv Light ◽

Photocatalytic Property ◽

Powder Sample ◽

Visible Absorption ◽

Plaster Of Paris ◽

Composite Pellets ◽

Uv Visible ◽

Photocatalytic Applications ◽

Absorption Technique

A BiF3 powder sample was prepared from the purchased Bi2O3 powder via the precipitation route. The photocatalytic performance of the prepared BiF3 powder was compared with the Bi2O3 powder and recognized as superior. The prepared BiF3 powder sample was added in a plaster of Paris (POP) matrix in the proportion of 0%, 1%, 5%, and 10% by wt% to form POP–BiF3(0%), POP–BiF3(1%), POP–BiF3(5%), and POP–BiF3(10%) composite pellets, respectively, and activated the photocatalytic property under the UV–light irradiation,in the POP. In this work, Resazurin (Rz) ink was utilized as an indicator to examine the photocatalytic activity and self-cleaning performance of POP–BiF3(0%), POP–BiF3(1%), POP–BiF3(5%), and POP–BiF3(10%) composite pellets. In addition to the digital photographic method, the UV–visible absorption technique was adopted to quantify the rate of the de-colorization of the Rz ink, which is a direct measure of comparative photocatalytic performance of samples.

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STUDI PENGARUH PERBANDINGAN REAKTAN LIGNIN NaHSO3 DAN pH TERHADAP NATRIUM LIGNOSULFONAT (NaLS)

Jurnal Riset Kimia ◽

10.25077/jrk.v1i2.43 ◽

2015 ◽

Vol 1 (2) ◽

pp. 133

Author(s):

Gustini Syahbirin ◽

Ani Suryani ◽

Tesar Dzikrulloh

Keyword(s):

Functional Group ◽

Black Liquor ◽

Sodium Lignosulfonate ◽

Visible Absorption ◽

Concrete Admixtures ◽

Initial Ph ◽

Soda Pulping ◽

Uv Visible ◽

Soda Lignin

ABSTRACT Lignin was isolated from waste black liquor of soda pulping process. Sulfonation of soda lignin produced Sodium Lignosulfonate (NaLS) which can be used as dispersants, and concrete admixtures. In this research, sulfonation was carried out towards lignin with ratio of lignin-NaHSO3 of 1.0:0.4; 1.0:0.5; and 1.0:0.6, and initial pH of 5.00; 6.00; 7.00. Parameters observed were purity, final pH, and yield of NaLS. The upsurge of initial pH increased the final pH and NaLS yield, but decreased its purity. The upsurge of ratio of lignin-NaHSO3 increased NaLS yield and decreased its purity, but did not affect the final pH of NaLS. The chosen optimum condition was on pH of 6.00 and ratio of lignin-NaHSO3 of 1.0:0.6. Characterization of functional group using FTIR, and purity of NaLS using UV-Visible Absorption Spectrophotometer. Keywords: soda lignin, sulfonation of lignin, sodium lignosulfonate

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Synthesis and Characterization of New Palladium(II) Schiff Base Complexes Derived from β-Diketones and Diamines

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22502 ◽

2020 ◽

Vol 32 (5) ◽

pp. 1039-1042

Author(s):

Mridula Gupta ◽

Sheela M. Valecha

Keyword(s):

Schiff Base ◽

Schiff Base Complexes ◽

Schiff Base Ligands ◽

Visible Absorption ◽

Oh Groups ◽

Uv Visible ◽

Coordinated Water ◽

Heterocyclic Schiff Bases ◽

Phenolic Oh Groups

A new series of heterocyclic Schiff bases were prepared from condensation of 1-phenyl-3-methyl-4-acetyl/benzoyl-pyrazolone with 4,4′-diaminodiphenylmethane and 4,4′-diaminodiphenyl ether, resulting in the formation of four novel Schiff base ligands. These ligands were then treated with ethanolic solution of PdCl2, to form corresponding palladium(II) complexes. These complexes were characterized by elemental analysis, IR, 1H NMR, TGA, magnetic susceptibility measurements and UV-visible absorption spectroscopy. All the Pd(II) complexes were found to have one coordinated water molecule. Schiff base ligands chelated with the metal atom through two donor sites N and O of azomethine (-C=N-) and phenolic (-OH) groups, respectively.

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