Molybdenum Complexes Bearing (Bi)thienyl‐ or Arylthienyl‐Substituted π‐Conjugated Spacers: Synthesis, Electrochemical, Spectroscopic and Nonlinear Optical Properties

Fonseca, A.; Belsley, M.; Gomes, E. Matos; Castro, M. Cidália R.; Raposo, M. Manuela M.

doi:10.1002/ejic.201000218

Cited by 8 publications

(2 citation statements)

References 49 publications

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“…Cyclic voltammograms were recorded at potential sweep-rates of 20, 50, 100 and 200 mV s −1 . Fc + /Fc couple was used as internal redox reference [20,21].…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

et al. 2018

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A series of benzothiadiazole-based push-pull heterocyclic systems were synthesized and characterized in order to study the variations induced by different aromatic and heterocyclic donor groups in the optical, electronic and photovoltaic properties of DSSCs prepared with the respective cyanoacetic acid derivatives. The organic sensitizers bear a 5-hexyl-2,2′-bithienyl or N,N-diphenylanilino donor moieties conjugated with a thienyl-benzothiadiazole spacer functionalized with the electron acceptor/anchoring cyanoacetic acid group. The solar cell based on TiO 2 sensitized with the novel dye bearing the 5-hexyl-2,2′-bithienyl donor, exhibited a power conversion efficiency of 0.95 % due the inefficient electron injection. Co-adsorption studies of the same dye resulted in enhanced photovoltaic conversion efficiency of 2.49 %, which represents an improvement of cell efficiency of 260 %. The sensitizer bearing the N,N-diphenylanilino donor exhibited 4.51 % power conversion efficiency, that was further enhanced by co-sensitization to 5.22 % efficiency.

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“…Cyclic voltammograms were recorded at potential sweep-rates of 20, 50, 100 and 200 mV s −1 . Fc + /Fc couple was used as internal redox reference [20,21].…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

et al. 2018

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“…Schiff bases have proven to be excellent candidate for the synthesis of NLO scaffolds due to their synthetic versatility as well as extensive π‐delocalisation inducing large electron asymmetry and introduction of metal centres into these ligands can further enhance the third order response . Even though a large number of transition metal Schiff base complexes19b, c, 20 with such property have been reported, similar studies on molybdenum complexes are very much limited to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

A Schiff base colorimetric chemosensor for CN^‐ ion and its dioxidomolybdenum (VI) complexes: Evaluation of structural aspects and optoelectronic properties

Asha

Edappadikkunnummal

Kurup

2020

Applied Organom Chemis

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Six new cis‐dioxidomolybdenum(VI) complexes featured with a tridentate ONO donor Schiff base derived from salicylidene‐2‐aminophenolato backbone have been synthesised and characterised by elemental analysis, spectroscopic techniques (like IR, UV‐vis and 1H‐NMR) and cyclic voltammetry. Suitable single crystals of the parent complex [MoO2L(MeOH)]2·H2O (1) was obtained by the slow evaporation of the mother liquor, whereas the crystals of the complexes 2‐6 were grown in coordinating solvents like ethanol, DMF, DMSO etc. and were characterised by single crystal X‐ray diffraction as monomers stabilised by the solvent molecules used for the recrystallization purpose. The structures of the complexes were further quantified using Hirshfeld surface analysis. The Schiff base acts as a colorimetric chemosensor for CN‐ ions in DMSO solution. The receptor‐CN‐ ion interaction and the sensing mechanism of the chemosensor were verified by colorimetric, UV‐vis, 1H‐NMR and FT‐IR spectroscopic studies. Hydroxyl moiety present in the receptor function as the binding site for cyanide ion thereby leading to its optical discrimination in presence of other anions by producing a visible colour change from colourless to yellow. Therefore the Schiff base sensor portrays estimable selectivity and sensitivity towards CN‐ ion. Additionally the Schiff base as well as the molybdenum complexes exhibit good third order non‐linear optical properties and optical power limiting when analysed by the Z‐scan technique.

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Electrochemical and Catalytic Studies of a Manganese(III)Complex with a Tetradentate Schiff‐Base Ligand Encapsulated in NaY Zeolite

Kuźniarska‐Biernacka¹,

Rodrigues²,

Carvalho³

et al. 2013

Eur J Inorg Chem

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The manganese(III) complex with a Schiff‐base salen‐type ligand (1,5‐bis{[(1E)‐(2‐hydroxyphenyl)methylene]amino}‐1H‐imidazole‐4‐carbonitrile) has been encapsulated in the nanopores of a Y zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. Cyclic voltammetry studies revealed that the neat complex undergoes reversible oxidation in dmf, which has been attributed to the MnII/III redox couple, whereas the two heterogeneous catalysts show different electrochemical behaviour in aqueous medium. The encapsulated and non‐encapsulated homogeneous MnIIIsalen complexes were screened as catalysts for olefin oxidation by using tBuOOH as the oxygen source in different solvents. Under the optimized conditions, the catalysts exhibited moderate activity. Both heterogeneous catalysts catalysed the oxidation of cyclohexene with tBuOOH, primarily to give the allylic oxidation products. These catalysts were found to be reusable after the catalytic cycle, but with some loss of activity. A DFT study confirmed the distortion of the complex in the zeolite cage, the main difference being observed for the bonded chloride.

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Molybdenum Complexes Bearing (Bi)thienyl‐ or Arylthienyl‐Substituted π‐Conjugated Spacers: Synthesis, Electrochemical, Spectroscopic and Nonlinear Optical Properties

Cited by 8 publications

References 49 publications

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

A Schiff base colorimetric chemosensor for CN^‐ ion and its dioxidomolybdenum (VI) complexes: Evaluation of structural aspects and optoelectronic properties

Electrochemical and Catalytic Studies of a Manganese(III)Complex with a Tetradentate Schiff‐Base Ligand Encapsulated in NaY Zeolite

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Molybdenum Complexes Bearing (Bi)thienyl‐ or Arylthienyl‐Substituted π‐Conjugated Spacers: Synthesis, Electrochemical, Spectroscopic and Nonlinear Optical Properties

Cited by 8 publications

References 49 publications

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

Benzothiadiazole derivatives functionalized with two different (hetero)aromatic donor groups: Synthesis and evaluation as TiO 2 sensitizers for DSSCs

A Schiff base colorimetric chemosensor for CN‐ ion and its dioxidomolybdenum (VI) complexes: Evaluation of structural aspects and optoelectronic properties

Electrochemical and Catalytic Studies of a Manganese(III)Complex with a Tetradentate Schiff‐Base Ligand Encapsulated in NaY Zeolite

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A Schiff base colorimetric chemosensor for CN^‐ ion and its dioxidomolybdenum (VI) complexes: Evaluation of structural aspects and optoelectronic properties