Ay B., Yildiz E., Kani I. · Polyhedron · 2018 · 1-8
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 authors classify compounds 1 and 2 as semiconducting solid-phase materials based on pressed-pellet conductivity values near 10^-4 S/cm.
Caveat: Only room-temperature/fixed-temperature four-point-probe conductivity values are reported; no activation energy, temperature dependence, pellet density, contact validation or uncertainty is given.
7 · 3.6. Electrical conductivity · Fig. 8 · Linked to 2 structured results
Compounds 1 and 2 are isomorphous/isostructural triclinic lanthanide coordination polymers with similar coordination environments.
Caveat: Full CIF coordinate files were not assigned locally; extraction relies on the main article tables and figures.
4 · 3.1. Structure description of 1 and 2 · Linked to 4 structured results
Experimental PXRD patterns agree with simulated patterns, supporting pure crystalline phases for both CPs.
Caveat: Peak positions/intensities were not digitised from the rendered SI; the claim relies on the authors' reported comparison and visual SI pattern.
6 · 3.3. Thermal analysis and PXRD patterns · Fig. S8 · Linked to 2 structured results
The red photoluminescence emissions of compounds 1 and 2 are attributed to ligand-to-metal charge transfer and increased polymer rigidity after lanthanide coordination.
Caveat: Attribution is qualitative; no lifetime, quantum yield or time-resolved data are reported.
7 · 3.5. Photoluminescence properties · Fig. 7 · Linked to 2 structured results
Compound 2 is reported to be slightly more conductive than compound 1, attributed by the authors to different La/Nd electronic configurations.
Caveat: The conductivity difference is small and no error bars are reported; the source text also appears to give an incorrect La3+ electronic configuration, so this mechanistic explanation is weak.
7 · 3.6. Electrical conductivity · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| compound 1, (H2pip)n[La2(pydc)4(H2O)2]n | (H2pip)n[La2(pydc)4(H2O)2]n; empirical formula C16H13N3O9LaLa(III) · 2,6-pyridinedicarboxylate (pydc2-); piperazinium (H2pip) counter-cation | 1D · PristineTriclinic P -1 lanthanide coordination polymer; nine-coordinate La(III) in a distorted mono-capped square antiprism environment, with pydc bridges forming ladder/chain motifs and supramolecular packing. | 1 · Abstract |
| compound 2, (H2pip)n[Nd2(pydc)4(H2O)2]n | (H2pip)n[Nd2(pydc)4(H2O)2]n; empirical formula C16H13N3O9NdNd(III) · 2,6-pyridinedicarboxylate (pydc2-); piperazinium (H2pip) counter-cation | 1D · PristineTriclinic P -1 lanthanide coordination polymer; nine-coordinate Nd(III) in a distorted mono-capped square antiprism environment, used as the representative structure in the paper. | 4 · 3.1. Structure description of 1 and 2 · Fig. 3 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| compound 1 colourless crystalsresearch_0335__mat__mat_la_pydc | Single Crystal · Target Sample · Pristine Framework | Hydrothermally synthesised crystals washed with water and dried at room temperature. | 2 · 2.2. Synthesis of (H2pip)n[La2(pydc)4(H2O)2]n |
| compound 1 pressed pelletresearch_0335__mat__mat_la_pydc | Pellet · Target Sample · Pristine Framework | Sample pelleted under pressure as a solid phase before four-point-probe conductivity measurement. | 7 · 3.6. Electrical conductivity |
| compound 2 violet crystalsresearch_0335__mat__mat_nd_pydc | Single Crystal · Target Sample · Pristine Framework | Hydrothermally synthesised crystals washed/dried as for compound 1. | 2 · 2.3. Synthesis of (H2pip)n[Nd2(pydc)4(H2O)2]n |
| compound 2 pressed pelletresearch_0335__mat__mat_nd_pydc | Pellet · Target Sample · Pristine Framework | Sample pelleted under pressure as a solid phase before four-point-probe conductivity measurement. | 7 · 3.6. Electrical conductivity |