Li Q.-W., Li Z.-Y., Li K. et al. · Chinese Journal of Chemistry · 2021 · 3381-3385
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 four lanthanide-hypophosphite frameworks adopt a novel AB2X7 composition rather than the known lanthanide-formate ABX4 structural model.
3382 · Background and Originality Content · Scheme 1 · Linked to 4 structured results
The hypophosphite ligand transfers weak antiferromagnetic exchange between Gd3+ ions in complex 1.
Caveat: Magnetic measurements were reported for complex 1 only.
3384 · Magnetic properties · Figure 5; Figure S6 · Linked to 3 structured results
Complex 1 has the best proton-conductivity evidence in this paper because guanidinium provides six H-donors and dense hydrogen-bond networks in the channels.
Caveat: Only complex 1 was quantitatively measured for proton conductivity; conductivity of complexes 2-4 is not reported.
3383 · Proton conductivity properties · Linked to 4 structured results
The authors assign proton conduction in complex 1 to a Grotthuss hopping mechanism based on the 0.15 eV activation energy.
Caveat: Mechanism is inferred from Arrhenius activation energy and hydrogen-bond topology, not directly observed by spectroscopy.
3383 · Proton conductivity properties · Figure 4 · Linked to 1 structured result
At high RH, guanidinium guests may cooperate with limited water molecules that enter the channels and improve proton-transfer efficiency.
Caveat: The paper reports poorer single-crystal diffraction after humidification as indirect evidence for limited water entry.
3383 · Proton conductivity properties · Figure S1 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| complex 1, guanidinium gadolinium hypophosphite framework | (GUA)[Gd2(H2PO2)7]; elemental-analysis formula Gd2CH20N3P7O14Gd3+ centres in GdO7 coordination polyhedra · hypophosphite (H2PO2-) bridging ligands; guanidinium guest cations in channels | 3D · PristineOrthorhombic Pbcm AB2X7 NaCl-like framework; each Gd3+ links to six neighbouring Gd3+ ions through anti-anti and syn-anti hypophosphite ligands. | 3382 · Results and Discussion - Crystal structures · Figure 1; Table S1 |
| complex 2, imidazolium gadolinium hypophosphite framework | (IM)[Gd2(H2PO2)7]; elemental-analysis formula Gd2C3H19N2P7O14Gd3+ centres in seven-coordinate hypophosphite environments · hypophosphite (H2PO2-) bridging ligands; imidazolium guest cations in channels | 3D · PristineMonoclinic P2/c AB2X7 framework closely related to complexes 3 and 4, with alternate square and rhombus channels. | 3383 · Results and Discussion - Crystal structures · Figure 2; Table S1 |
| complex 3, pyrazole/pyrazolium gadolinium hypophosphite framework | (PZ)[Gd2(H2PO2)7]; elemental-analysis formula Gd2C3H19N2P7O14Gd3+ centres in seven-coordinate hypophosphite environments · hypophosphite (H2PO2-) bridging ligands; pyrazole-derived protonated guest cations in channels | 3D · PristineMonoclinic P2/c AB2X7 framework isostructural with complexes 2 and 4. | 3382 · Background and Originality Content · Scheme 1 |
| complex 4, triazolium gadolinium hypophosphite framework | (TRZ)[Gd2(H2PO2)7]; elemental-analysis formula Gd2C2H18N3P7O14Gd3+ centres in seven-coordinate hypophosphite environments · hypophosphite (H2PO2-) bridging ligands; triazolium guest cations in channels | 3D · PristineMonoclinic P2/c AB2X7 framework isostructural with complexes 2 and 3. | 1 · Experimental Section - Synthesis |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| complex 1 colourless crystals / polycrystalline powderresearch_0702__mat__m_gua_gd_hypophosphite_1 | Powder · Target Sample · Guest Loaded | colourless crystals collected by filtration; polycrystalline samples used for PXRD and TGA | 1 · Experimental Section - Synthesis |
| complex 1 crystalline powder disc with silver glue electrodesresearch_0702__mat__m_gua_gd_hypophosphite_1 | Pellet · Target Sample · Guest Loaded | crystalline powder moulded into a disc and daubed with conductive silver glue on both sides | 3383 · Proton conductivity properties · Figure 4; Figure S5 |
| complex 2 imidazolium Gd hypophosphite crystalsresearch_0702__mat__m_im_gd_hypophosphite_2 | Powder · Target Sample · Guest Loaded | prepared by the complex 1 procedure with imidazolium replacing guanidine carbonate; polycrystalline samples used for PXRD and TGA | 1 · Experimental Section - Synthesis |
| complex 3 pyrazole-derived Gd hypophosphite crystalsresearch_0702__mat__m_pz_gd_hypophosphite_3 | Powder · Target Sample · Guest Loaded | prepared by the complex 1 procedure with pyrazole replacing guanidine carbonate; polycrystalline samples used for PXRD and TGA | 1 · Experimental Section - Synthesis |
| complex 4 triazolium Gd hypophosphite crystalsresearch_0702__mat__m_trz_gd_hypophosphite_4 | Powder · Target Sample · Guest Loaded | prepared by the complex 1 procedure with triazolium replacing guanidine carbonate; polycrystalline samples used for PXRD and TGA | 1 · Experimental Section - Synthesis |