The synthesis, redox properties, and ligand binding of heterobinuclear transition-metal macrocyclic ligand complexes. Measurement of an apparent delocalization energy in a mixed-valent copper(I)copper(II) complex

Gagné, Robert R.; Spiro, Clifford L.; Smith, Thomas J.; HAMANN, C. A.; Thies, W. R.; Shiemke, A. D.

doi:10.1021/ja00404a017

Cited by 392 publications

(166 citation statements)

References 3 publications

(3 reference statements)

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“…Experimental Materials 2,6-Diformyl-4-methylphenol was synthesized according to the literature method [48]. 1,2-Diaminobenzene (SigmaAldrich) and zinc(II) nitrate hexahydrate (Merck, India) were purchased and used as such.…”

Section: Uv-visible Diffuse Reflectance Spectral Studymentioning

confidence: 99%

A novel zinc(II) macrocycle-based synthesis of pure ZnO nanoparticles

Pushpanathan¹,

Kumar²

2014

J Nanostruct Chem

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Dinuclear zinc(II) complex of the 18-membered tetraiminediphenol macrocycle has been synthesized by Schiff base condensation of 2,6-diformyl-4-methylphenol and 1,2-diaminobenzene in the presence of zinc(II) template. The obtained complex has been characterized by the spectroscopic techniques and mass spectrometry. The complex exhibits high thermal stability and forms ZnO nanoparticles on thermal decomposition. The diffraction peaks in the X-Ray diffraction spectra indicated that the complexes are crystalline. The surface morphology has been investigated by scanning electron microscopy. Energy dispersive X-ray analysis shows the chemical purity and stoichiometry of the ZnO nanoparticles. The BET surface area of ZnO nanoparticles has been found. The transmission electron microscopy result shows spherical shaped ZnO nanoparticles with the size of 20 nm. Quantum confinement effects are clearly revealed in UV-Vis spectroscopy technique.

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Section: Uv-visible Diffuse Reflectance Spectral Studymentioning

confidence: 99%

A novel zinc(II) macrocycle-based synthesis of pure ZnO nanoparticles

Pushpanathan¹,

Kumar²

2014

J Nanostruct Chem

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“…Afterward, the hydroxymethyl reaction of some phenolic compounds with formaldehyde in basic conditions were further studied, however, there is lack of study about p-cresol, particularly no systematic study about the influences of sodium hydroxide amount, reaction temperature and time. Therefore, the method in previous reports for synthesis of 2,6-DHMMP using of p-cresol and formaldehyde is used nowadays [4][5][6][7][8] . Base on others and our previous work, DEPT135 was used in the present study to investigate the reaction process between p-cresol and formaldehyde in basic conditions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 2,6-dihydroxymethyl-4-methyl phenol and Its Application in Novolac Resins

Yang¹,

Cong

et al. 2014

J. Photopol. Sci. Technol.

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DEPT135 was used to study the hydroxymethylation of p-cresol in basic condition. The roles of type and amount of catalyst, reaction temperature, reaction time were investigated to optimize reaction conditions for the synthesis of 2,6-dihydroxymethyl-4-methyl phenol(2,6-DHMMP). Subsequently, a series of novolac resins with extremely high or low M W , narrow M W /M N , as well as alternating co-condensation structure have been produced by the condensation of 2,6-DHMMP and phenol, m-cresol etc. The synthesized p-cresol/phenol resin has a M W of 20000-30000, and M W /M N of 15-20, and also excellent resistance to alcohol and alkali, which meet the needs of photosensitive compositions. The synthesized p-/m-cresol resin has a M W of 25000, and M W /M N of below 15, as well as well resistance to alkali, heat and etching. These novolac resins have good prospects in terms of resist and printing plates.

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“…Compared to the bulk of literature available o n dicopper(I1) complexes, very little has been reported o n heterodimetallic complexes of these ligands, 'Author to whom correspondence may be addressed. such coniplexes (21,72). T h e heterodimetallic complexes, having copper(I1) as one metal centre and the other metal centre varying among Mn(II), Fe(II), Co(II), and Ni(II), have been shown to exhibit considerable antife~roiiiagnetic coupling between the metal centres.…”

Section: Introductionmentioning

confidence: 99%

“…Dinuclear copper (11) complexes of these ligands show interesting magnetic and redox behaviour (10)(11)(12)(13)(14)(15)(16)(17)(18)(19). T h e dicopper cornplex of macrocyclic Schiff base ligand obtained tiom the condensation of 2-hydroxy-5-methylbenzene-1,3-dicarbaldehyde and 1,3-diamino-propane exhibits reversible oneelectron transfers at two different potentials, although both copper centres are identical with respect to ligand environment and geometry (20).…”

Section: Introductionmentioning

confidence: 99%

Influence of metal–metal interaction on magnetic and redox properties in different series of heterodinuclear copper(II), nickel(II), and zinc(II) complexes

Srinivas¹,

Zacharias²

1992

Can. J. Chem.

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Different series of heterodinuclear complexes, viz.,|CuNiL](ClO4)2•nH2O,[CuZnL](ClO4)2•nH2O,[NiCuL](ClO4)2•nH2O, and [NiZnL](ClO4)2•nH2O complexes where L is a dinucleating Schiff base ligand derived from the condensation of 1 mole of 2-hydroxy-5-methylbenzene-1,3-dicarbaldehyde, 1 mole of 1,3-diaminopropane, and 2 moles of ortho- or para-substituted aniline, have been synthesized and investigated. The μeff values of the CuNiL and NiCuL series of complexes suggest presence of weak antiferromagnetic coupling in them. In MeCN and DMF the CuNiL and NiCuL series of complexes exhibit two reversible one-electron redox couples at two different potentials. The large separation between the two redox couples is attributed to the antiferromagnetic interaction between the metal centres in the complexes. In the NiCuL series of complexes, the observed shift of 100–150 mV in E1 to more negative values in complexes with potential donor groups such as OMe, OEt, SMe, etc. in the ortho position of the phenyl group of L is explained on the basis of weak bonding interactions of these groups with the copper centre. The CuNiL series of complexes do not exhibit such shift in E1 values since there is no significant change in the square planar geometry of the copper centre. The CuZnL and NiZnL series of complexes exhibit only single one-electron redox couple as could be anticipated.

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The synthesis, redox properties, and ligand binding of heterobinuclear transition-metal macrocyclic ligand complexes. Measurement of an apparent delocalization energy in a mixed-valent copper(I)copper(II) complex

Cited by 392 publications

References 3 publications

A novel zinc(II) macrocycle-based synthesis of pure ZnO nanoparticles

A novel zinc(II) macrocycle-based synthesis of pure ZnO nanoparticles

Synthesis of 2,6-dihydroxymethyl-4-methyl phenol and Its Application in Novolac Resins

Influence of metal–metal interaction on magnetic and redox properties in different series of heterodinuclear copper(II), nickel(II), and zinc(II) complexes

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