Kanizaj L., Senjug P., Pajic D. et al. · Materials · 2020 · 1-20
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.
Compound 3 is a 3D heterotrimetallic oxalate-bridged framework with dia topology and was reported as the first structurally known oxalate-based compound containing Ca2+, Cr3+ and Cu2+.
Caveat: Novelty claim depends on the authors' CSD search at publication time.
3 and 9 · Introduction; 3.3. Molecular and Crystal Structures · Figures 5-7 · Linked to 2 structured results
Compound 1 behaves close to an ideal 1D Heisenberg antiferromagnetic chain because intra-chain antiferromagnetic Mn-Mn coupling is significant while inter-chain coupling is negligible.
Caveat: Magnetic claim, not direct electrical transport evidence.
12 · 3.4. Magnetization Study · Figure 8 · Linked to 2 structured results
The small inter-dimer ferromagnetic interaction in compound 3 may arise from finite spin polarisation of Ca2+ orbitals, allowing super-exchange over a nearly diamagnetic bridge.
Caveat: The authors present this as a possible mechanism and note spin-density calculations are beyond scope.
15 · 3.4. Magnetization Study · Figure 11 · Linked to 2 structured results
Compounds 1 and 2 form through partial decomposition of [Cr(C2O4)3]3-, which releases oxalate from the chromium(III) coordination sphere; in compound 3 each oxalate group of the precursor remains a bridge toward metal ions in the 3D network.
5-6 · 3.1. Synthesis
Compound 2 has the highest room-temperature DC conductivity among compounds 1-3, attributed to its complex anion/cation environment and water/methanol-enabled hydrogen-bond network that can facilitate proton transfer and continuous conduction pathways.
Caveat: The paper uses impedance spectroscopy and discusses proton transfer, but does not report humidity-dependent conductivity, isotope tests, or activation energies.
16 · 3.5. Electrical Study of Compounds 1-3 · Figure 12; Table S7 · Linked to 6 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Compound 3, {[CaCr2Cu2(phen)4(C2O4)6]·4CH3CN·2H2O}n | {[CaCr2Cu2(phen)4(C2O4)6]·4CH3CN·2H2O}nCa2+, Cr3+ and Cu2+ centres; Ca nodes connected to four Cr atoms through oxalate bridges · 1,10-phenanthroline (phen); oxalate | 3D · Pristine3D heterotrimetallic coordination polymer with diamondoid (dia) or (6^6) topology; tetragonal P41212 | 9 · 3.3. Molecular and Crystal Structures of Compounds 1-3 · Figures 5-7 |
| Compound 2, {[CrCu3(bpy)3(CH3OH)(H2O)(C2O4)4][Cu(bpy)Cr(C2O4)3]·CH2Cl2·CH3OH·H2O}n | {[CrCu3(bpy)3(CH3OH)(H2O)(C2O4)4][Cu(bpy)Cr(C2O4)3]·CH2Cl2·CH3OH·H2O}nCu2+ and Cr3+ centres in oxalate-bridged chains plus pendant Cu1-Cu2 dimer · 2,2'-bipyridine (bpy); oxalate | 1D · PristineP-1 heterodimetallic 1D coordination polymer containing Cr1-Cu3 and Cr2-Cu4 chains and a Cu1-Cu2 pendant dimeric unit | 7 · 3.3. Molecular and Crystal Structures of Compounds 1-3 · Figure 2 |
| Compound 1, {[Mn(bpy)(C2O4)]·1.5H2O}n | {[Mn(bpy)(C2O4)]·1.5H2O}nMn2+ centres linked by oxalate bridges · 2,2'-bipyridine (bpy); oxalate | 1D · Pristineneutral 1D zigzag oxalate-bridged chain in monoclinic C2/c; chains self-assembled by hydrogen bonding and pi-stacking | 1 · Abstract |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Compound 1 yellow crystals / polycrystalline pressed pelletresearch_0394__mat__mat_mn_bpy_ox_1 | Pellet · Target Sample · Pristine Framework | yellow crystals isolated, washed with a small amount of water, dried in air; polycrystalline sample pressed into pellet for impedance0.4 to 0.6 mm for pressed pellets used in impedance spectroscopy | 3 and 5 · 2.2.1. Synthesis; 2.5. Electrical Study |
| Compound 2 green prismatic crystals / polycrystalline pressed pelletresearch_0394__mat__mat_crcu_bpy_ox_2 | Pellet · Target Sample · Mixed Metal | green prismatic crystals isolated, washed with water and dried in air; polycrystalline sample pressed into pellet for impedance0.4 to 0.6 mm for pressed pellets used in impedance spectroscopy | 3 · 2.2.2. Synthesis |
| Compound 3 dark green prismatic crystals / polycrystalline pressed pelletresearch_0394__mat__mat_cacrcu_phen_ox_3 | Pellet · Target Sample · Mixed Metal | dark green prismatic crystals isolated, washed with diluted matrix and methanol, quickly dried in air; polycrystalline sample pressed into pellet for impedance0.4 to 0.6 mm for pressed pellets used in impedance spectroscopy | 4 · 2.2.3. Synthesis |