Prasad R.L., Kushwaha A., Shrivastava O.N. · Journal of Solid State Chemistry · 2012 · 471-481
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
The paper does not report porosity, thermoelectric, electrochemical, sensing, or device application measurements beyond pressed-pellet electrical transport.
Caveat: Based on main text and provided SI text file.
p001-p011 · whole article
Complex 4 is a distinct heterobimetallic species rather than an equimolar physical mixture of monometallic complexes 2 and 3.
Caveat: Assignment is from powder/thermal signatures rather than single-crystal structure.
p004 · 3.1 Thermal studies / 3.3 PXRD spectra · Fig. 2 · Linked to 4 structured results
Complex 7 is a distinct low-Cu heterobimetallic coordination polymer rather than a mixture of monometallic complexes.
Caveat: PXRD evidence is referenced to SI Fig. S6, whose text-only SI extract lacks the actual plot image.
p004-p005 · 3.1 Thermal studies / 3.3 PXRD spectra · Fig. S6 · Linked to 1 structured result
The authors attribute the semiconductor-to-metallic switch in complex 4 to mixed valency/non-integral oxidation states generated by electronic communication between Cu and Ni through the conjugated dadb bridge.
Caveat: Mechanistic conclusion is inferred from magnetic and ESR data; direct electronic band measurements are not reported.
p010 · Conclusion · Linked to 5 structured results
Complex 4 exhibits metallic behaviour across the studied RT-180 deg C range and is the highest-conductivity sample in the series.
Caveat: Absolute conductivity values are read from Fig. 10 and the paper reports specific conductance without clearly printing the unit in the axis label.
p009-p010 · 3.8 Solid state electrical conductivity · Fig. 10 · Linked to 3 structured results
Complex 7 is interpreted as predominantly Cu(I)-rich with integral copper valency, explaining its ESR inactivity and different transport behaviour from complex 4.
Caveat: This is an inferred redox-state model; SI Annexure calculations are theoretical equilibrium estimates.
p006-p007 · 3.5 Magnetic moment and ESR spectral studies · Fig. 5 · Linked to 5 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Complex 2, poly[Cu(dadb).2H2O] | [Cu(C6H2O2N2Cl2).2H2O]nCu(II) · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineTentatively assigned square-planar 1-D coordination polymer around copper; crystalline powder by PXRD. | p008 · 3.6 Theoretical computations · Fig. 8 |
| Complex 3, poly[Ni(dadb).2H2O] | [Ni(C6H2O2N2Cl2).2H2O]nNi(II) · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineTentatively assigned octahedral polymeric 1-D structure around nickel; crystalline powder by PXRD. | p008 · 3.6 Theoretical computations · Fig. 8 |
| Complex 4, poly[Cu0.5Ni0.5(dadb).2H2O] | [Cu0.5Ni0.5(C6H2O2N2Cl2).2H2O]nCu/Ni mixed metal sites, nominal Cu:Ni = 1:1 · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineHeterobimetallic 1-D coordination polymer with square-planar Cu and octahedral Ni proposed; PXRD and thermal data indicate a distinct phase rather than a mixture of 2 and 3. | p008 · 3.6 Theoretical computations · Fig. 8 |
| Complex 5, poly[Cu0.25Ni0.75(dadb).2H2O] | [Cu0.25Ni0.75(C6H2O2N2Cl2).2H2O]nCu/Ni mixed metal sites, nominal Cu:Ni = 1:3 · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineHeterobimetallic 1-D coordination polymer, geometry extrapolated from the Cu and Ni monometallic complexes. | p001 · Abstract |
| Complex 6, poly[Cu0.125Ni0.875(dadb).2H2O] | [Cu0.125Ni0.875(C6H2O2N2Cl2).2H2O]nCu/Ni mixed metal sites, nominal Cu:Ni = 1:7 · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineHeterobimetallic 1-D coordination polymer, geometry extrapolated from the Cu and Ni monometallic complexes. | p001 · Abstract |
| Complex 7, poly[Cu0.0625Ni0.9375(dadb).2H2O] | [Cu0.0625Ni0.9375(C6H2O2N2Cl2).2H2O]nCu/Ni mixed metal sites, nominal Cu:Ni = 1:15 · dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinone | 1D · PristineHeterobimetallic 1-D coordination polymer; PXRD and thermal data indicate a distinct species rather than a monometallic mixture. | p004 · 3.3 Powder X-ray diffraction spectra · Fig. S6 |
| Computed dadb-bridged Cu/Ni oligomer models | [Cu2(mu-dadb)(dadbH)2.4H2O], [Cu2(mu-dadb)(dadbH)2], [Ni2(mu-dadb)(dadbH)2.4H2O], [CuNi(mu-dadb)(dadbH)2.2H2O]Cu and/or Ni model centres · mu-dadb and dadbH model ligands | 0D · Model SystemMolecular model systems used to rationalise Cu square-planar/octahedral and Ni octahedral environments. | p003 · 2.4 Theoretical computation |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Complex 2 powder / pressed pelletresearch_0415__mat__complex2_cu_dadb | Powder · Pristine Control · Pristine Framework | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Complex 3 powder / pressed pelletresearch_0415__mat__complex3_ni_dadb | Powder · Pristine Control · Pristine Framework | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Complex 4 powder / pressed pelletresearch_0415__mat__complex4_cu05ni05_dadb | Powder · Target Sample · Mixed Metal | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Complex 5 powder / pressed pelletresearch_0415__mat__complex5_cu025ni075_dadb | Powder · Target Sample · Mixed Metal | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Complex 6 powder / pressed pelletresearch_0415__mat__complex6_cu0125ni0875_dadb | Powder · Target Sample · Mixed Metal | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Complex 7 powder / pressed pelletresearch_0415__mat__complex7_cu00625ni09375_dadb | Powder · Target Sample · Mixed Metal | Isolated powder; for electrical transport, pressed as spherical pellets in a 13 mm die at 6 ton, cured at 110 deg C for 2 h, cooled, and contacted with conductive silver paint. | p002 · 2.2 Synthesis of metal complexes / 2.3 Analysis and physical measurements |
| Computed oligomer model systemsresearch_0415__mat__computed_oligomer_models | Model · Model System · Model | Geometry-optimised molecular models; no physical sample. | p003 · 2.4 Theoretical computation |