1217364-00-5Relevant academic research and scientific papers
Synthesis, characterization and luminescence properties of copper(I) complexes containing 2-phenyl-3-(benzylamino)-1,2-dihydroquinazolin-4(3H)-one and triphenylphosphine as ligands
Chavan,Gaikwad,Sawant,Lahiri
, p. 1871 - 1875 (2011)
Some copper(I) complexes of the formula [Cu(L)(PPh3) 2]X (1-4) [where L = 2-phenyl-3-(benzylamino)-1,2-dihydroquinazolin- 4(3H)-one; PPh3 = triphenylphosphine; X = Cl-, NO 3-, ClO4/su
Copper(I) Complexes of N-(2-{[(2E)-2-(4-Nitrobenzylidenyl)Hydrazinyl]Carbonyl}Phenyl)Benzamide and Triphenylphosphine: Synthesis, Characterization and Luminescence Properties
Chavan,Pawal,More,Willis
, p. 2033 - 2040 (2016)
Copper(I) complexes of the formula [Cu(L)(PPh3)2]X (1–4) (X?=?Cl(1), ClO4(2), BF4(3) and PF6(4)) [where L?=?N-(2-{[(2E)-2-(4-nitrobenzylidenyl)hydrazinyl]carbonyl}phenyl)benzamide; PPh3?=?triphenylphosphine] have been prepared by the condensation of N-[2-(hydrazinocarbonyl)phenyl]benzamide with 4-nitrobenzaldehyde followed by the reaction with CuCl, [Cu(MeCN)4]ClO4, [Cu(MeCN)4]BF4 and [Cu(MeCN)4]PF6 in presence of triphenylphosphine as a coligand. Complexes 1–4 were then characterized by elemental analyses, FTIR, UV-visible and 1H NMR spectroscopy. Mononuclear copper(I) complexes 1–4 were formed with L in its keto form by involvement of azomethine nitrogen and the carbonyl oxygen along with two PPh3 groups. A single crystal X-ray diffraction study of the representative complex [(Cu(L)(PPh3)2]CIO4 (2) reveals a distorted tetrahedral geometry around Cu(I). Crystal data of (2): space group = C2/c, a?=?42.8596 (9) ?, b?=?14.6207 (3) ?, c?=?36.4643 (7) ?, V?=?20,653.7 (7) ?3, Z?=?16. Complexes 1–4 exhibit quasireversible redox behaviour corresponding to a Cu(I)/Cu(II) couple. All complexes show blue-green emission as a result of fluorescence from an intra-ligand charge transition (ILCT), ligand to ligand charge transfer transition (LLCT) or mixture of both. Significant increase in size of the counter anion shows marked effect on quantum efficiency and lifetime of the complexes in solution.
Synthesis, characterization, luminescence and catalytic properties of copper(I) complexes with N-(2-pyridylmethylene)-1,5-dimethyl-2-pyrazole-3-(2H)-one and triphenylphosphine as ligands
Devkule,More,Chavan
, p. 183 - 189 (2016/11/09)
A series of copper(I) complexes of the formula [Cu(L)(PPh3)2]X (1–4) [where L = N-(2-pyridylmethylene)-1,5-dimethyl-2-pyrazole-3-(2H)-one; PPh3= triphenylphosphine, X = Cl(1), ClO4(2), BF4(3) and PF6(4)] have been prepared by the condensation of 4-aminoantipyrine with pyridine-2-carboxaldehyde followed by reaction with CuCl, [Cu(MeCN)4]ClO4, [Cu(MeCN)4]BF4,[Cu(MeCN)4]PF6in presence of triphenylphosphine as a coligand. A single crystal X-ray diffraction study of the representative complex [Cu(L)(PPh3)2]BF4(3) reveals a distorted tetrahedral geometry around Cu(I). Complexes 1–4 exhibit quasireversible redox behavior corresponding to a Cu(I)/Cu(II) couple. All complexes show orange-red emission as a result of fluorescence from an intra-ligand charge transition (ILCT) with some metal to ligand charge transfer (MLCT) character. Significant increase in size of the counter anion shows marked effect on quantum efficiency and lifetime of the complexes. The catalytic efficiency of the complexes was tested and it was found that all the complexes worked as an effective catalyst in the Sonogashira coupling of phenylacetylene with aryl halides in good yield.
Synthesis, crystal structure and conjugation properties of iminopyridine copper(I) phosphine complexes
Jadhav,Pawal,Chavan
, p. 77 - 83 (2015/11/17)
Some copper(I) complexes with imonopyridine ligands [Cu(L1)(PPh3)2]X (X = Cl (1a), ClO4 (2a), BF4 (3a), PF6 (4a)) and [Cu(L2)(PPh3)2]X (X = Cl (1b), ClO4 (2b), BF4 (3b), PF6 (4b)) [Where L1 = N-(2-pyridylmethylene)-4-(bromo)aniline, L2 = N-(2-pyridylmethylene)-4-(ethynyl)aniline; PPh3 = triphenylphosphine] have been synthesized and characterized on the basis of their elemental analyses, IR, 1H NMR and 31P NMR spectral studies. The representative complexes [Cu(L1)(PPh3)2]ClO4 (2a) and [Cu(L2)(PPh3)2]PF6 (4b) were characterized by single crystal X-ray analysis which reveals a distorted tetrahedral geometry around each copper(I) center. Quasireversible redox behavior is accounted for all complexes corresponding to Cu(II)/Cu(I) couple. Photophysical properties of all complexes indicate that the insertion of ethynyl (CC-H) functionality on iminopyridine induces pronounced red shift in absorption and emission wavelength of copper(I) complexes.
Copper(I) complexes of 2-methoxy-(5-trifluoromethyl-phenyl)-pyridine-2yl-methylene-amine: Impact of phosphine ancillary ligands on luminescence and catalytic properties of the copper(I) complexes
Chavan,Sawant,Pawal,More
, p. 192 - 199 (2016/01/15)
Some copper(I) complexes of the type [Cu(L)(PPh3)2]X (X = Cl (1a), CN (1b), ClO4 (1c), BF4 (1d)) and [Cu(L)(dppe)]X (X = Cl (2a), CN (2b), ClO4 (2c) and BF4 (2d)) [where L = 2-methoxy-(5-trifluoromethyl-phenyl)-pyridine-2yl-methylene-amine; PPh3 = triphenylphosphine; dppe = 1,2-bis(diphenylphosphino)ethane] have been prepared and characterized on the basis of elemental analyses, IR, UV-Vis, 1H NMR and 31P NMR spectral studies. The representative complex of the series 1d and 2c are characterized by single crystal X-ray diffraction which reveal that, in each complex the central copper(I) ion assumes the irregular pseudo-tetrahedral geometry. All the complexes display a weak MLCT that varies considerably with phosphine ligands. Quasireversible redox behavior is accounted for all complexes corresponding to Cu(I)/Cu(II) couple and is sensitive to phosphine ligands. All the complexes exhibit blue-green emission originate from intra-ligand charge transfer (ILCT), ligand to ligand charge transfer (LLCT) transitions or mixture of them and vary markedly with the phosphine ligands. The copper(I) complexes with dppe ancillary ligand shows greater activity for the amination of iodobenzene as compared to PPh3 ancillary ligand in the complexes.
Mixed-ligand complexes of copper(I) with Schiff base and triphenylphosphine: Effective catalysts for the amination of aryl halide
Chavan,Sawant,Sawant,Lahiri
, p. 1373 - 1376 (2011/10/05)
Some copper(I) complexes of the type [Cu(L)(PPh3)2]X (1-4) [where L = 2-chloro-(5-trifluoromethyl-phenyl)-pyridine-2-ylethylene- amine; X = Cl-, CN-, ClO4- and BF4-] have been prepared by the condensation of 3-amino-4-chloro-benzotrifluoride with 2-acetylpyridine followed by the reaction with [Cu(MeCN)2(PPh3)2]Cl, [Cu(MeCN) 2(PPh3)2]CN, [Cu(MeCN)2(PPh 3)2]ClO4 and [Cu(MeCN)2(PPh 3)2]BF4. All the complexes 1-4 were characterized on the basis of elemental analysis, IR, UV-visible and 1H NMR spectral studies. The representative complex of the compound 3 has been characterized by single crystal X-ray diffraction which reveals that the central copper(I) ion assumes highly distorted tetrahedral geometry. All the complexes worked as effective catalyst for the amination of aryl halide.
Synthesis, characterization and catalytic study of Schiff base copper(I) complexes for the amination of aryl halide
Sawant,Gaikwad,Sawant,Yamgar,Chavan
, p. 632 - 635 (2009/10/17)
A series of Schiff base copper(I) complexes [Cu(L1)(PPh3)2]X (1a-d) and [Cu(L2)(PPh3)2]X (2a-d) [where L1 - (3-trifluoromethyl-phenyl)-pyridine-2-ylmethylene-amine and L2/s
