Synthesis and characterization of copper(ii) complexes with multidentate ligands as catalysts for the direct hydroxylation of benzene to phenol

2015 ◽  
Vol 44 (17) ◽  
pp. 8013-8020 ◽  
Author(s):  
Li Wu ◽  
Wei Zhong ◽  
Beibei Xu ◽  
Zhenhong Wei ◽  
Xiaoming Liu
Keyword(s):  
Catalytic Efficiency ◽  
Synthesis And Characterization ◽  
Multidentate Ligands ◽  
Hydroxylation Of Benzene ◽  
Reduction Potentials ◽  
Direct Hydroxylation

Like iron(iii) complexes, copper(ii) complexes catalyse the direct hydroxylation of benzene to phenol with H2O2 as the oxidant and their catalytic efficiency correlates with the reduction potentials of the copper(ii) complexes.

Synthesis and Characterization of V-HMS Employed for Catalytic Hydroxylation of Benzene

2009 ◽  
Vol 131 (3-4) ◽  
pp. 458-462 ◽  
Author(s):  
Sujiao Feng ◽  
Supeng Pei ◽  
Bin Yue ◽  
Lin Ye ◽  
Linping Qian ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Hydroxylation Of Benzene

scholarly journals Synthesis and characterization of fluorinated azadipyrromethene complexes as acceptors for organic photovoltaics

2016 ◽  
Vol 12 ◽  
pp. 1925-1938 ◽  
Author(s):  
Forrest S Etheridge ◽  
Roshan J Fernando ◽  
Sandra Pejić ◽  
Matthias Zeller ◽  
Geneviève Sauvé
Keyword(s):  
Organic Photovoltaics ◽  
Conjugated Polymer ◽  
Lower Energy ◽  
Energy Levels ◽  
Electron Acceptors ◽  
Synthesis And Characterization ◽  
Fluorine Substitution ◽  
Reduction Potentials ◽  
Oxidation Potentials

Homoleptic zinc(II) complexes of di(phenylacetylene)azadipyrromethene (e.g., Zn(WS3)2) are potential non-fullerene electron acceptors for organic photovoltaics. To tune their properties, fluorination of Zn(WS3)2 at various positions was investigated. Three fluorinated azadipyrromethene-based ligands were synthesized with fluorine at the para-position of the proximal and distal phenyl groups, and at the pyrrolic phenylacetylene moieties. Additionally, a CF3 moiety was added to the pyrrolic phenyl positions to study the effects of a stronger electron withdrawing unit at that position. The four ligands were chelated with zinc(II) and BF2 + and the optical and electrochemical properties were studied. Fluorination had little effect on the optical properties of both the zinc(II) and BF2 + complexes, with λmax in solution around 755 nm and 785 nm, and high molar absorptivities of 100 × 103 M−1cm−1 and 50 × 103 M−1cm−1, respectively. Fluorination of Zn(WS3)2 raised the oxidation potentials by 0.04 V to 0.10 V, and the reduction potentials by 0.01 V to 0.10 V, depending on the position and type of substitution. The largest change was observed for fluorine substitution at the proximal phenyl groups and CF3 substitution at the pyrrolic phenylacetylene moieties. The later complexes are expected to be stronger electron acceptors than Zn(WS3)2, and may enable charge transfer from other conjugated polymer donors that have lower energy levels than poly(3-hexylthiophene) (P3HT).

Synthesis and characterization of new multi-site phase transfer catalyst and its catalytic efficiency in dichlorocarbene addition to (R)-Carvone

2016 ◽  
Vol 62 ◽  
pp. 31-38
Author(s):  
Duraimurugan Kumaraguru ◽  
Dhanamoorthy Vaithialingam ◽  
Jesin Beneto Arockiam ◽  
Ashokkumar Veeramanoharan ◽  
Siva Ayyanar
Keyword(s):  
Phase Transfer ◽  
Catalytic Efficiency ◽  
Phase Transfer Catalyst ◽  
Synthesis And Characterization

scholarly journals Synthesis and Characterization of Some New Bipyridyl-Based Multidentate Ligands and Their CuI Complexes.

1997 ◽  
Vol 51 ◽  
pp. 462-469 ◽  
Author(s):  
Riitta H. Laitinen ◽  
Katalin Csoban ◽  
Jouni Pursiainen ◽  
Juhani Huuskonen ◽  
Kari Rissanen ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Multidentate Ligands

Spectroscopic and Electrochemical Studies on Oxaporphyrins and Oxathiaporphyrins

1998 ◽  
Vol 02 (01) ◽  
pp. 69-78 ◽  
Author(s):  
B. SRIDEVI ◽  
S. JEYAPRAKASH NARAYANAN ◽  
A. SRINIVASAN ◽  
M. V. REDDY ◽  
T. K. CHANDRASHEKAR
Keyword(s):  
Excited States ◽  
Electrochemical Behaviour ◽  
Resonance Interaction ◽  
Sharp Contrast ◽  
Synthesis And Characterization ◽  
Emission Characteristics ◽  
Electrochemical Studies ◽  
Reduction Potentials

The synthesis and characterization of oxaporphyrins ( OTPP and O 2 TPP ) containing one and two furan rings in place of pyrrole and a mixed oxathiaporphyrin ( OSTPP ) is reported. Spectroscopic and electrochemical studies reveal that oxaporphyrins exhibit optical and emission characteristics closer to the parent H 2 TPP , while their electrochemical behaviour parallels that reported for mono and dithiaporphyrins. However the characteristics of the mixed oxathia derivative resemble that of monothiaporphyrin. Protonation studies reveal weaker resonance interaction between the β-hydrogens and meso-phenyl substituents in sharp contrast to thiaporphyrins. The reduction potentials for OSTPP and O 2 TPP indicate stabilization and destabilization of their LUMOs relative to the parent H 2 TPP in the ground and excited states, respectively.

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