Tetradentate dithiooxamide ligands and their nickel complexes. Synthesis, characterization, and crystal structure of a mononuclear neutral complex, Ni((c-C5H9)NHC(S)C(S)N(CH2)2NC(S)C(S)NH(c-C5H9))

Ye, Qiu Yun.; Nakano, Yoshiharu; Frauenhoff, Greg R.; Whitcomb, David R.; Takusagawa, Fusao; Busch, Daryle H.

doi:10.1021/ic00007a016

Cited by 22 publications

(11 citation statements)

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“…The flat band position originated from the intersection is around −1.10 V versus Ag/AgCl for PCN and around −0.97 V versus Ag/AgCl for Nic-CN. Based on the commonly accepted knowledge in n-type semiconductor system that the CB potential is generally equal to the flat band potential, [52][53][54] the CB edge of PCN and Nic-CN is ascertained to −1.10 and −0.97 eV, respectively. The above results demonstrate the CB edge of Nic-CN downshifts about 0.13 eV, which is primarily contributed to the modulation of pyridine.…”

Section: Resultsmentioning

confidence: 99%

Porous Carbon Nitride Thin Strip: Precise Carbon Doping Regulating Delocalized π‐Electron Induces Elevated Photocatalytic Hydrogen Evolution

Zhang

Liu

et al. 2021

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The photocatalytic efficiency of polymeric carbon nitride is hampered by high carrier recombination rate and low charge transfer. Herein, these issues are addressed by constructing 1D strip-like carbon nitride with a large π-electron conjugated system from carbon-doping, realizing the synchronization control of its electronic structure and morphology. Nicotinic acid, a monomer with the carboxyl group and pyridine ring, and melamine are selected for assembling the strip-like supramolecular via hydrogen bond under hydrothermal process. Both peripheral pyridine unit and hydrogen bond have significant effect on self-assembly process of nicotinic acid and melamine along one dimension to form a strip-like precursor. Subsequently, 1D thin porous strip-like carbon nitride is obtained by calcination treatment of precursor. The as-prepared 1D strip-like carbon nitride with effective π delocalization from carbon-doping and porous structure can accelerate charges and mass transfer and provide extra active sites. Both theoretical and experimental results demonstrate that carbon doping (pyridine heterocycle) narrows the bandgap via manipulating the band position and increases the π electron density. Thus, the 1D porous thin strip-like carbon nitride realizes compelling hydrogen evolution rate (126.2 µmol h −1), far beyond (≈18 fold) the value of polymeric carbon nitride (PCN) (7.2 µmol h −1) under visible light irradiation.

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Section: Resultsmentioning

confidence: 99%

Porous Carbon Nitride Thin Strip: Precise Carbon Doping Regulating Delocalized π‐Electron Induces Elevated Photocatalytic Hydrogen Evolution

Zhang

Liu

et al. 2021

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“…Rubeanic acid (RA), one of the precursor, is widely used as a N, S-contained organic ligand for transition metal ions. [33][34][35] We expect that RA would show superior properties for doping CDs with nitrogen and sulfur, largely because it has a higher molar rate of nitrogen and sulfur to carbon (C:N:S = 1:1:1) than that of usual co-doping material, namely sulfhydryl amino acid (mostly L-cysteine) (C:N:S=3:1:1). The previously reported N, S-doped carbon dots generally use -SH as sulfur source.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…For instance, binding with nickel and copper, each RA molecule commonly provides two binding sites for one complex unit, either in the form of - [33][34][35] But in the case of mercury(II), because of the stronger class B character of mercury, the coordination is in the form of -[S-Hg 2+ -S]-, wherein each RA molecule provides only one site for one complex unite. [33] During the formation of NSCDs, the none-carbonized CA-RA oligomers may tangle onto the carbon core.…”

Section: Figurementioning

confidence: 99%

Highly luminescent N, S- Co-doped carbon dots and their direct use as mercury(II) sensor

Wang

Kim

Feng

2015

Analytica Chimica Acta

162

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“…Scheme 2. [13][14][15][16] Furthermore, only for one heteroatomsubstituted type II complex, namely [Ni(edo){Gd[HB( pz) 3 ] 2 } 2 ] (edo = ethylenebis(oxamidato), HB( pz) 3 − = hydrotris( pyrazol-1-yl)borate), magnetic measurements are reported. 16 The central metal ion of that complex is, as well as of the other trimetallic complexes, shown in Scheme 2, a diamagnetic Ni II ion in a planar coordination environment.…”

Section: Introductionmentioning

confidence: 99%

An interplay between the spin density distribution and magnetic superexchange interactions: a case study of mononuclear [nBu4N]2[Cu(opooMe)] and novel asymmetric trinuclear [Cu3(opooMe)(pmdta)2](NO3)2·3MeCN

et al. 2012

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Treatment of the diethyl ester of o-phenylenebis(oxamic acid) (opbaH(2)Et(2), 1) with 5/6 equivalent of MeNH(2) in abs. EtOH results in the exclusive formation of the ethyl ester of o-phenylene(N′-methyl oxamide)(oxamic acid) (opooH(3)EtMe, 2) in ca. 50% yield. Treatment of 2 with four equivalents of [Me(4)N]OH followed by the addition of Cu(ClO(4))(2)·6H(2)O gave [Me(4)N](2)[Cu(opooMe)]·H(2)O (3A) in ca. 80% yield. As 3A appears to be a hygroscopic solid, the related [(n)Bu(4)N](+) salts [(n)Bu(4)N](2)[M(opooMe)]·H(2)O (M = Cu (3B), Ni (4)) have been synthesized. By addition of two equivalents of [Cu(pmdta)(NO(3))(2)] to a MeCN solution of 3B the novel asymmetric trinuclear complex [Cu(3)(opooMe)(pmdta)(2)](NO(3))(2) (5) could be obtained in ca. 90% yield. Compounds 2, 3A, 3B, 4 and 5 have been characterized by elemental analysis and NMR/IR spectroscopy. Furthermore, the solid state structures of 3A in the form of [Me(4)N](2)[Cu(opooMe)]·MeOH (3A′), 3B in the form of [(n)Bu(4)N](2)[Cu(opooMe)] (3B′), 4 in the form of [(n)Bu(4)N](2)[Ni(opooMe)]·1.25H(2)O (4′) and 5 in the form of [Cu(3)(opooMe)(pmdta)(2)] (NO(3))(2)·3MeCN (5′), respectively, have been determined by single-crystal X-ray diffraction studies. By controlled cocrystallization, diamagnetically diluted 3B (1%) in the host lattice of 4 (99%) in the form of single crystals have been made available, allowing single crystal EPR studies to extract all components of the g-factor and the tensors of onsite (Cu)A and transferred (N)A hyperfine interaction. Out of these studies the spin density distribution of the [Cu(opooMe)](2-) complex fragment could be determined. The magnetic properties of 5 were studied by susceptibility measurements versus temperature. An intramolecular J parameter of -65 cm(-1) has been obtained, unexpectedly, as 5 should possess two different J values due to its two different spacers between the adjacent Cu(II) ions, namely an oxamate (C(2)NO(3)) and an oxamidate (C(2)N(2)O(2)) fragment. This unexpected result is explained by a summarizing discussion of the experimentally obtained EPR results (spin density distribution) of 3B, the geometries of the terminal [Cu(pmdta)](2+) fragments of 5 determined by X-ray crystallographic studies and accompanying quantum chemical calculations of the spin density distribution of the mononuclear [Cu(opooMe)](2-) and of the magnetic exchange interactions of trinuclear [Cu(3)(opooMe)(pmdta)(2)](2+) complex fragments.

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Tetradentate dithiooxamide ligands and their nickel complexes. Synthesis, characterization, and crystal structure of a mononuclear neutral complex, Ni((c-C5H9)NHC(S)C(S)N(CH2)2NC(S)C(S)NH(c-C5H9))

Cited by 22 publications

References 1 publication

Porous Carbon Nitride Thin Strip: Precise Carbon Doping Regulating Delocalized π‐Electron Induces Elevated Photocatalytic Hydrogen Evolution

Porous Carbon Nitride Thin Strip: Precise Carbon Doping Regulating Delocalized π‐Electron Induces Elevated Photocatalytic Hydrogen Evolution

Highly luminescent N, S- Co-doped carbon dots and their direct use as mercury(II) sensor

An interplay between the spin density distribution and magnetic superexchange interactions: a case study of mononuclear [nBu4N]2[Cu(opooMe)] and novel asymmetric trinuclear [Cu3(opooMe)(pmdta)2](NO3)2·3MeCN

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