Prasad R.L., Kushwaha A. · Journal of Coordination Chemistry · 2012 · 4230-4244
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 study aims to create a partially filled conduction band without external redox treatment by incorporating Cu(II) unpaired electrons into a conjugated coordination-polymer chain.
Caveat: The achieved conductivity enhancement is stated to be smaller than expected.
p015 / 4243 · Conclusion · Linked to 2 structured results
Complexes 4-6 are distinct heterobimetallic coordination-polymer species rather than physical mixtures of monometallic complexes 2 and 3.
Caveat: Complex 7 identity is supported by ESR/PXRD but thermal residue alone was inconclusive.
p007 / 4235 · 3.1 · Linked to 6 structured results
The authors tentatively assign a square-planar 1-D structure for 2, tetrahedral polymeric 1-D structure for 3, and mixed Cu square-planar/Zn tetrahedral 1-D structures for 4-7.
Caveat: The structures are proposed from spectroscopic and computational evidence; no single-crystal structure is reported.
p013 / 4241 · 3.6 · Figure 1 · Linked to 3 structured results
Heterobimetallic Cu/Zn complexes conduct better than monometallic controls because Zn dilution reduces spin-spin interactions and enhances unpaired-electron population on the conjugated ligand chain.
Caveat: The mechanistic interpretation relies partly on DFT/NBO model systems and qualitative ESR line-shape arguments.
p014 / 4242 · 3.7 · Linked to 5 structured results
All complexes 2-7 exhibit semiconductor behaviour, with conductance increasing as temperature increases.
Caveat: Conductivity values are reported graphically as log sigma; no tabulated raw conductivity values are supplied.
p013 / 4241 · 3.7 · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Complex 2, Cu(dadb).2H2O | [Cu(dadb).2H2O]n; dadb = 2,5-diamino-3,6-dichloro-1,4-benzoquinoneCu(II) · dadb | 1D · PristineTentative square-planar 1-D coordination polymer; complex 2 is the monometallic Cu control. | p002 / 4230 · Abstract |
| Complex 3, Zn(dadb).H2O | [Zn(dadb).H2O]n as reported in synthesis; abstract generalises y = 2Zn(II) · dadb | 1D · PristineTentative tetrahedral polymeric 1-D coordination polymer; monometallic Zn control. | p003 / 4231 · 2.2.1 |
| Complex 4, Cu0.5Zn0.5(dadb).2H2O | [Cu0.5Zn0.5(dadb).2H2O]nCu(II), Zn(II) · dadb | 1D · PristineTentative mixed-metal 1-D coordination polymer with square-planar Cu and tetrahedral Zn environments. | p013 / 4241 · 3.6 · Figure 1 |
| Complex 5, Cu0.25Zn0.75(dadb).2H2O | [Cu0.25Zn0.75(dadb).2H2O]nCu(II), Zn(II) · dadb | 1D · PristineHeterobimetallic 1-D coordination polymer; distinct phase inferred from PXRD. | p004 / 4232 · 2.2.2 |
| Complex 6, Cu0.125Zn0.875(dadb).2H2O | [Cu0.125Zn0.875(dadb).2H2O]nCu(II), Zn(II) · dadb | 1D · PristineHeterobimetallic 1-D coordination polymer; distinct phase inferred from PXRD. | p004 / 4232 · 2.2.3 |
| Complex 7, Cu0.0625Zn0.9375(dadb).2H2O | [Cu0.0625Zn0.9375(dadb).2H2O]nCu(II), Zn(II) · dadb | 1D · PristineHeterobimetallic 1-D coordination polymer with highly diluted Cu(II) centres. | p004 / 4232 · 2.2.1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Model 2 prime, Cu2(mu-dadb)(dadbH)2research_0744__mat__mat_2_cu_dadb | Model · Model System · Model | DFT/NBO model for anhydrous complex 2. | p009 / 4237 · 3.5 |
| Complex 2 compressed pelletresearch_0744__mat__mat_2_cu_dadb | Pellet · Pristine Control · Pristine Framework | Powdered sample compressed at 6 ton, cured at 110 deg C for 2 h, slowly cooled, then silver-painted for contacts.13 mm diameter pellet; thickness not reported | p005 / 4233 · 2.3 |
| Model 3 prime, Zn2(mu-dadb)(dadbH)2research_0744__mat__mat_3_zn_dadb | Model · Model System · Model | DFT/NBO model for complex 3. | p009 / 4237 · 3.5 |
| Complex 3 compressed pelletresearch_0744__mat__mat_3_zn_dadb | Pellet · Pristine Control · Pristine Framework | Powdered sample compressed and cured for two-probe conductivity; silver paint contacts.13 mm diameter pellet; thickness not reported | p005 / 4233 · 2.3 |
| Model 4 prime, CuZn(mu-dadb)(dadbH)2research_0744__mat__mat_4_cu05zn05_dadb | Model · Model System · Model | DFT/NBO model for mixed Cu/Zn complex 4. | p009 / 4237 · 3.5 |
| Complex 4 compressed pelletresearch_0744__mat__mat_4_cu05zn05_dadb | Pellet · Target Sample · Mixed Metal | Mixed-metal powder compressed/cured into silver-painted pellet for transport.13 mm diameter pellet; thickness not reported | p003 / 4231 · 2.2.1 |
| Complex 5 compressed pelletresearch_0744__mat__mat_5_cu025zn075_dadb | Pellet · Target Sample · Mixed Metal | Light brown solid compressed/cured into silver-painted pellet for transport.13 mm diameter pellet; thickness not reported | p004 / 4232 · 2.2.2 |
| Complex 6 compressed pelletresearch_0744__mat__mat_6_cu0125zn0875_dadb | Pellet · Target Sample · Mixed Metal | Light gray solid compressed/cured into silver-painted pellet for transport.13 mm diameter pellet; thickness not reported | p004 / 4232 · 2.2.3 |
| Complex 7 compressed pelletresearch_0744__mat__mat_7_cu00625zn09375_dadb | Pellet · Target Sample · Mixed Metal | Gray solid compressed/cured into silver-painted pellet for transport.13 mm diameter pellet; thickness not reported | p004 / 4232 · 2.2.1 |