Zhang X., Tian X., Wu N. et al. · Science Advances · 2024 · eadl6498
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.
Zn3Cu1-HHTP gives the strongest reported EMW absorption in this cMOF series, with RLmin -81.62 dB and EAB 3.7 GHz.
Caveat: Application measurement uses a paraffin-filled absorber ring; comparison with literature MOF derivatives is contextual rather than same-lab controlled except for the cMOF series.
6 · Discussion · Fig. 4; Table S5 · Linked to 4 structured results
ZnCu-HHTP bimetallic cMOFs are isostructural with Zn-HHTP and Cu-HHTP, with uniformly distributed Zn and Cu atoms.
Caveat: Full crystallographic refinement/CIF was not provided in the assigned documents.
2 · Results · Fig. 1; Fig. 2C · Linked to 3 structured results
Increasing Zn content shifts the (001) peak to larger angle, decreases interlayer spacing, and reduces the bandgap, enabling tuning of electronic structure.
Caveat: Causal interpretation relies on combined experimental trends and DFT modelling.
3 · Results · Fig. 2C-F · Linked to 4 structured results
The same metal-substitution approach extends to ZnNi-HHTP bimetallic cMOFs and tunes permittivity.
Caveat: ZnNi results are shown mainly in SI figures and are less numerically detailed than ZnCu-HHTP.
5, 7 · Results; Materials and Methods · Figs. S15-S16 · Linked to 1 structured result
Metal substitution tunes GHz-range complex permittivity and dielectric loss by adjusting interlayer charge transport.
Caveat: Permittivity values were measured on 50 wt % cMOF/paraffin composites, not neat MOF pellets.
5-6 · Results; Discussion · Fig. 3 · Linked to 3 structured results
The EMW absorption is attributed to synergistic conductive loss from tuned bandgaps, dipole polarization from functional groups, and rod-like shape anisotropy.
Caveat: Mechanism is inferred from spectroscopy, morphology, Cole-Cole/attenuation analysis and simulations, not directly isolated by a single experiment.
6 · Discussion · Fig. 4G · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Cu-HHTPBrowse family: Cu₃(HHTP)₂ / Cu–HHTP | Cu3(HHTP)2Cu2+ centres · 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) | 2D · PristineLayered 2D hexagonal cMOF with (100), (200), (210), and (001) PXRD reflections; ordered pi-stacked layers. | 2-3 · Results · Fig. 1; Fig. 2C |
| Ni-HHTPBrowse family: Ni₃(HHTP)₂ / Ni–HHTP | Ni3(HHTP)2Ni2+ centres · HHTP | 2D · PristineLayered HHTP cMOF analogue used in the ZnNi-HHTP extension. | 7 · Materials and Methods · Fig. S15 |
| Zn1Cu3-HHTPBrowse family: Cu/Zn–HHTP family | (Zn0.75Cu2.25)(HHTP)2 nominal feed ratio equivalentmixed Zn2+/Cu2+ centres · HHTP | 2D · PristineIsostructural bimetallic ZnCu-HHTP cMOF with rod-like morphology and ordered interlayer stacking. | 2, 7 · Results; Materials and Methods · Fig. 2C; Table S1 |
| Zn1Ni3-HHTPBrowse family: Ni/Zn–HHTP family | Zn/Ni-HHTP, Zn:Ni feed ratio 1:3mixed Zn2+/Ni2+ centres · HHTP | 2D · PristineBimetallic HHTP cMOF analogue used to demonstrate generality of interlayer tuning. | 22 · Fig. S15 caption · Fig. S15 |
| Zn2Cu2-HHTPBrowse family: Cu/Zn–HHTP family | (Zn1.5Cu1.5)(HHTP)2 nominal feed ratio equivalentmixed Zn2+/Cu2+ centres · HHTP | 2D · PristineIsostructural bimetallic ZnCu-HHTP cMOF with tunable interlayer spacing. | 5 · Table S1 · Table S1 |
| Zn2Ni2-HHTPBrowse family: Ni/Zn–HHTP family | Zn/Ni-HHTP, Zn:Ni feed ratio 1:1mixed Zn2+/Ni2+ centres · HHTP | 2D · PristineBimetallic HHTP cMOF analogue used to demonstrate generality of interlayer tuning. | 22 · Fig. S15 caption · Fig. S15 |
| Zn3Cu1-HHTPBrowse family: Cu/Zn–HHTP family | (Zn2.25Cu0.75)(HHTP)2 nominal feed ratio equivalentmixed Zn2+/Cu2+ centres · HHTP | 2D · PristineBimetallic rod-like 2D cMOF; Zn and Cu atoms evenly distributed; honeycomb pore structure and ordered interlayer stacking. | 2 · Results · Fig. 1D,E |
| Zn3Ni1-HHTPBrowse family: Ni/Zn–HHTP family | Zn/Ni-HHTP, Zn:Ni feed ratio 3:1mixed Zn2+/Ni2+ centres · HHTP | 2D · PristineBimetallic HHTP cMOF analogue used to demonstrate generality of interlayer tuning. | 22 · Fig. S15 caption · Fig. S15 |
| Zn-HHTPBrowse family: Zn–HHTP family | Zn3(HHTP)2Zn2+ centres · HHTP | 2D · PristineSingle-metal layered HHTP cMOF control; isostructural with ZnCu-HHTP and Cu-HHTP. | 2, 7 · Results; Materials and Methods · Fig. 2C |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Cu-HHTP powder/rod crystalsresearch_0239__mat__m_cu_hhtp | Powder · Pristine Control · Pristine Framework | Hydrothermally prepared, centrifuged, washed with water and ethanol, and dried at 50 C for 12 h. | 7 · Materials and Methods |
| Ni-HHTP powderresearch_0239__mat__m_ni_hhtp | Powder · Pristine Control · Pristine Framework | Prepared by the ZnCu-HHTP method with Ni(CH3COO)2.4H2O replacing Cu(CH3COO)2. | 7 · Materials and Methods · Fig. S15 |
| Zn1Cu3-HHTP powder/rod crystalsresearch_0239__mat__m_zn1cu3_hhtp | Powder · Target Sample · Mixed Metal | Hydrothermally prepared from Zn:Cu feed ratio 1:3 and dried at 50 C for 12 h. | 7 · Materials and Methods |
| Zn1Ni3-HHTP powderresearch_0239__mat__m_zn1ni3_hhtp | Powder · Target Sample · Mixed Metal | ZnNi-HHTP analogue prepared by the ZnCu-HHTP method. | 22 · Fig. S15 caption · Fig. S15 |
| Zn2Cu2-HHTP powder/rod crystalsresearch_0239__mat__m_zn2cu2_hhtp | Powder · Target Sample · Mixed Metal | Hydrothermally prepared from Zn:Cu feed ratio 1:1 and dried at 50 C for 12 h. | 7 · Materials and Methods |
| Zn2Ni2-HHTP powderresearch_0239__mat__m_zn2ni2_hhtp | Powder · Target Sample · Mixed Metal | ZnNi-HHTP analogue prepared by the ZnCu-HHTP method. | 22 · Fig. S15 caption · Fig. S15 |
| Zn3Cu1-HHTP powder/rod crystalsresearch_0239__mat__m_zn3cu1_hhtp | Powder · Target Sample · Mixed Metal | Hydrothermally prepared from Zn:Cu feed ratio 3:1 and dried at 50 C for 12 h. | 7 · Materials and Methods |
| Zn3Cu1-HHTP/paraffin toroidal ringresearch_0239__mat__m_zn3cu1_hhtp | Pellet · Composite Sample · Composite | 50 wt % cMOF alloy mixed with 50 wt % paraffin wax for electromagnetic parameter measurement.1.2-5.0 mm absorber thicknesses for RL modelling; toroidal ring inner diameter 3.04 mm and outer diameter 7.00 mm | 8 · Characterization |
| Zn3Ni1-HHTP powderresearch_0239__mat__m_zn3ni1_hhtp | Powder · Target Sample · Mixed Metal | ZnNi-HHTP analogue prepared by the ZnCu-HHTP method. | 22 · Fig. S15 caption · Fig. S15 |
| Zn-HHTP powder/rod crystalsresearch_0239__mat__m_zn_hhtp | Powder · Pristine Control · Pristine Framework | Hydrothermally prepared and dried at 50 C for 12 h. | 7 · Materials and Methods |
| high-crystallinity ZnCu-HHTP seriesresearch_0239__mat__m_zn3cu1_hhtp | Powder · Target Sample · Mixed Metal | Prepared by slowly adding metal-ion aqueous solutions into the isopropanol/HHTP solution. | 6-7 · Discussion; Materials and Methods · Figs. S18-S19 |