Rouhani F., Rafizadeh-Masuleh F., Morsali A. · Journal of the American Chemical Society · 2019 · 11173-11182
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.
TMU-60 is a rapid and selective Cd(II) sorbent, reaching high capacity with over 90% of capacity in less than 10 minutes and limited interference from other tested metal ions.
Caveat: Selectivity is evaluated for the reported ion set and aqueous conditions.
3 · Sorption Studies · Figure S3 · Linked to 3 structured results
The authors argue that porosity alone is insufficient for conductivity improvement; suitable metal-ion interaction sites and proper distances between nodes and adsorbed ions are key.
Caveat: Generalisation tests on SBA-15, UiO-66, MIL-100(Fe), and HKUST-1 are described qualitatively without full numeric tables in the extracted text.
8 · Direct Current I-V Measurement · Linked to 4 structured results
Cd(II) sorption in TMU-60 increases and tunes framework conductivity; conductivity rises from 53 x 10^-6 S/cm for pristine TMU-60 to 1.8 x 10^-2 S/cm for TMU-60-Cd compressed pellets.
Caveat: Conductivity is measured on compressed pellets; Cd amount/exposure time controls the state.
1 · Abstract · Linked to 4 structured results
Cd(II) interacts with nitrogen atoms in L*, as indicated by N 1s XPS shift and IR changes, placing Cd within framework pores and supporting charge-transfer pathways.
Caveat: Post-sorption porosity loss is partly figure-estimated; exact Cd site occupancy is inferred from spectroscopy and ICP rather than provided as a refined crystal structure.
4 · Sorption Studies · Figure 3 · Linked to 4 structured results
The likely charge-transport mechanism in TMU-60-Cd is hopping between paddle-wheel nodes and localized Cd(II) on L* nitrogen sites rather than continuous through-bond Zn conduction.
Caveat: Mechanism is proposed by authors from structural arrangement, XPS, chronoamperometry, and electrochemical behaviour rather than direct microscopic observation of electron hops.
7 · Investigation of Charge-Transfer Mechanism · Figure 8 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| TMU-60 | [Zn(OBA)(L*)].DMF; SI empirical formula C21 H15 N2 O5 ZnZn2(COO)4 paddle-wheel secondary building units; Zn coordinated by four carboxylate O atoms and one pillar N atom · 4,4'-oxybis(benzoate) (OBA) and in situ formed 5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine ligand (L*) | 3D · PristineOrthorhombic, space group I bca; two-fold interpenetrated framework with one-dimensional channels along a axis. | 2 · Result and Discussion · Figure 1 |
| TMU-60-Cd | Cd(II)-sorbed TMU-60; host formula [Zn(OBA)(L*)].DMF with adsorbed Cd(II)Zn2(COO)4 paddle-wheel nodes plus localized Cd(II) interacting with ligand nitrogens after sorption · OBA and L* ligands; Cd(II) weakly binds amine nitrogen atoms of L* | 3D · UnknownGuest-loaded conductive state of TMU-60; XRD patterns remain intact after sorption/electrochemical tests. | 7 · Direct Current I-V Measurement · Figure 8 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Cd(II)-exposed TMU-60/PVDF paste electroderesearch_0054__mat__tmu60_cd | Electrode · Target Sample · Composite | TMU-60/PVDF paste electrode immersed in 50 ppm Cd(II) aqueous solution for time-dependent EIS/OCP/CV tests.Copper-wire paste electrode body · electrode hole radius 2.5 mm; depth 4 mm | 5 · Electrochemical Studies · Figure 6 |
| TMU-60-Cd compressed pelletresearch_0054__mat__tmu60_cd | Pellet · Target Sample · Guest Loaded | Pressed Cd2+-adsorbed dry MOF pellet; stored at 200 C for 4 h after preparation.1 cm diameter; 0.2 mm thickness | 7 · Direct Current I-V Measurement · Figure 9 |
| TMU-60-Cd powderresearch_0054__mat__tmu60_cd | Powder · Target Sample · Guest Loaded | Activated TMU-60 exposed to Cd(NO3)2 aqueous solution, centrifuged and washed to remove unsorbed Cd(II). | 3 · Sorption Studies |
| activated TMU-60 crystalsresearch_0054__mat__tmu60 | Powder · Pristine Control · Pristine Framework | Solvent-exchanged in CH2Cl2 for 48 h with refresh every 12 h, filtered, then heated at 120 C for 24 h; alternative activation 200 C under vacuum for 4 h. | 8 · Methods - Activation of TMU-60 |
| TMU-60 exposed to Zn(II), Co(II), Cu(II), or Pb(II)research_0054__mat__tmu60 | Pellet · Paper Level Unspecified · Guest Loaded | Activated TMU-60 exposed to alternative metal ion solutions for comparison with Cd(II). | 7 · Study of the Effect of Other Metal Ions on TMU-60 Conductivity · Table S5 |
| TMU-60/PVDF paste electrode before Cd(II) sorptionresearch_0054__mat__tmu60 | Electrode · Pristine Control · Composite | 10 mg ground activated TMU-60 mixed with 1 mg PVDF and compressed into electrode hole.Copper-wire paste electrode body · electrode hole radius 2.5 mm; depth 4 mm | 4 · Sorption Studies · Figure S5 |
| pristine TMU-60 compressed pelletresearch_0054__mat__tmu60 | Pellet · Pristine Control · Pristine Framework | Pressed activated dry pellet; stored at 200 C for 4 h after preparation.1 cm diameter; 0.2 mm thickness | 7 · Direct Current I-V Measurement · Figure 9 |