Saha K., Dutta B., Das P. et al. · Dalton Transactions · 2025 · 3346-3361
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.
Both CP1 and CP2 are selective fluorescence turn-off sensors for trace Pd2+ in aqueous medium, with CP1 showing the lower LOD.
Caveat: Detection is demonstrated in buffered laboratory suspensions and paper strips; no real environmental sample matrix was quantified in the main/SI text reviewed.
5 · Sensing studies · Fig. 3/Fig. 4/Fig. S14 · Linked to 6 structured results
The local CIF text for CCDC 2336301 is inconsistent with the article/SI CP2 crystallographic table and should not be used as the authoritative CP2 structure without manual verification.
Caveat: CIF text reports C 2/c monoclinic and different unit-cell parameters, whereas the article/SI table reports Pbca orthorhombic.
CIF header · Linked to 4 structured results
The authors report that CP1 and CP2 retain phase ordering and emission behaviour after Pd2+ exposure and across pH 2-12.
Caveat: PXRD and pH-stability results are qualitative in the available extracted text; no quantitative degradation metrics were reported.
5 · Sensing studies · Fig. S16-Fig. S20 · Linked to 4 structured results
CP1 is assigned as a 2D Zn(II)-bdc-flpy coordination polymer with a paddle-wheel Zn2 unit, whereas CP2 is assigned as a 1D Cd(II)-bdc-flpy chain with capped-octahedral CdN2O5 geometry.
Caveat: The local CP2 CIF conflicts with the article/SI table, so this claim relies on the main article and SI PDF tables.
3 · Structures of CP1 and CP2 · Fig. 1/Fig. 2 · Linked to 4 structured results
The CP2 thin-film diode conducts better than CP1, with higher conductivity, higher mobility and lower series resistance; the authors attribute this to Cd(II) 4d orbital delocalisation, H-bonding, pi-pi interactions and rectangular morphology.
Caveat: Attribution is interpretive, but the transport comparison is table-reported.
10 · Electrical characterization · Table 2/Fig. 10 · Linked to 6 structured results
Pd2+ detection is proposed to arise from Pd2+ accommodation in pi cavities and interaction with imine-N of flpy, rather than substitution of Zn(II) or Cd(II).
Caveat: Mechanistic assignment is inferred from spectroscopy, NMR titration and crystallographic space arguments; no directly solved Pd-loaded crystal structure is reported.
7-9 · XPS and sensing mechanism · Fig. 5-Fig. 8/Table 1 · Linked to 6 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| [Zn2(bdc)4(flpy)2]n (CP1) | [Zn2(bdc)4(flpy)2]n; elemental formula reported as C27H18N2O4ZnZn(II); binuclear Zn2N2O8 / [Zn2(bdc)4] paddle-wheel unit · bdc2- = 1,4-benzenedicarboxylate; flpy = 9H-fluoren-2-yl-pyridin-4-ylmethylene-amine | 2D · PristineTriclinic P-1 coordination polymer; bdc2- bridges Zn(II) centres and flpy coordinates through pyridyl-N, giving a 2D framework. | 3 · Results and discussion - Structures of CP1 and CP2 · Fig. 1/Table S1 |
| [Cd(bdc)2(flpy)2(H2O)]n.(flpy)n (CP2) | [Cd(bdc)2(flpy)2(H2O)]n.(flpy)n; elemental formula reported as C65H46N6O5Cd/C65H45N6O5CdCd(II); CdN2O5 capped-octahedral coordination motif · bdc2- = 1,4-benzenedicarboxylate; flpy = 9H-fluoren-2-yl-pyridin-4-ylmethylene-amine; coordinated water and free flpy are reported | 1D · PristineOrthorhombic Pbca coordination polymer in the article/SI tables; each bdc2- chelates/bridges Cd(II) centres to form a 1D fish-bone-like chain. | 3 · Results and discussion - Structures of CP1 and CP2 · Fig. 2/Table S4 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| CP1 as-synthesised block-shaped yellow crystalsresearch_0568__mat__mat_cp1_zn_bdc_flpy | Single Crystal · Target Sample · Pristine Framework | As-synthesised slow-diffusion crystals; collected by filtration for analysis. | 2 · Experimental section - Synthesis of CP1 and CP2 |
| ITO/CP1/Al Schottky dioderesearch_0568__mat__mat_cp1_zn_bdc_flpy | Thin Film · Target Sample · Pristine Framework | 2 mg/mL CP1 in DMF spin-coated onto cleaned ITO glass, vacuum-dried, Al evaporated through shadow mask.ITO-coated glass; Al top contact · nearest to one micrometre | 31-32 · Fabrication and Characterization of the device · Figure S30 |
| [CP1 + Pd2+]research_0568__mat__mat_cp1_zn_bdc_flpy | Powder · Target Sample · Guest Loaded | CP1 exposed to Pd2+ solution for sensing/XPS/EDS stability studies. | 7 · XPS/sensing discussion · Fig. 5/Fig. 6/Table S9 |
| CP2 as-synthesised yellow needle-like crystalsresearch_0568__mat__mat_cp2_cd_bdc_flpy | Single Crystal · Target Sample · Pristine Framework | As-synthesised slow-diffusion crystals; collected for analysis. | 2 · Experimental section - Synthesis of CP1 and CP2 |
| ITO/CP2/Al Schottky dioderesearch_0568__mat__mat_cp2_cd_bdc_flpy | Thin Film · Target Sample · Pristine Framework | 2 mg/mL CP2 in DMF spin-coated onto cleaned ITO glass, vacuum-dried, Al evaporated through shadow mask.ITO-coated glass; Al top contact · nearest to one micrometre | 31-32 · Fabrication and Characterization of the device · Figure S30 |
| [CP2 + Pd2+]research_0568__mat__mat_cp2_cd_bdc_flpy | Powder · Target Sample · Guest Loaded | CP2 exposed to Pd2+ solution for sensing/XPS/EDS stability studies. | 7 · XPS/sensing discussion · Fig. 5/Fig. 7/Table S9 |