Niemiec M., Zakrzewski J.J., Reczynski M. et al. · Advanced Optical Materials · 2025 · 2403564
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 Sr-Cr MOF phases provide dual optical sensing: 1a for ratiometric/lifetime humidity sensing and dehydrated 1deh for high-performance luminescent thermometry.
Caveat: The most sensitive DeltaT thermometry parameter is humidity dependent; DeltaT* is less humidity dependent but has lower sensitivity.
p.10 · Conclusion · Linked to 3 structured results
The highest-sensitivity DeltaT thermometric parameter is not ideal for simultaneous T/RH readout because it depends strongly on humidity; DeltaT* is the humidity-robust alternative.
Caveat: DeltaT* performance is weaker than DeltaT.
p.10 · 2.5 Dependence of Luminescence on Temperature · Figure S19/S20 · Linked to 2 structured results
Ba-based analogues 3/4 use cyanido bridges and this structural change limits both porosity and luminescent properties relative to Sr-Cr 1a.
Caveat: Conductivity was not reported for Ba analogues.
p.10 · Conclusion · Linked to 2 structured results
Water sorption in 1a is reversible and occurs without a breathing effect; the MOF skeleton remains largely intact between 1a and 1deh.
Caveat: Water uptake changes lattice solvation; dehydration further beyond 1deh damages crystallinity by removing coordinated aqua ligand.
p.5 · 2.2 Dynamic Vapor Sorption · Figure 3a · Linked to 3 structured results
At high humidity, adsorbed water molecules in 1a are the source of distinct proton conductivity; conductivity increase near saturation is attributed to reduced water vacancies.
Caveat: Conductivity values are modest and only extracted at high RH.
p.5/p.10 · 2.2; Conclusion · Figure 3 · Linked to 3 structured results
Activation energies of 1.45 and 0.69 eV exceed the 0.5 eV proton-hopping boundary, so the authors assign vehicle-type proton transfer in 1a.
Caveat: Mechanism is inferred from activation energies and structural arguments; no isotope or direct proton-transport experiment is reported.
p.5 · 2.2 Dynamic Vapor Sorption and Proton Conductivity Studies · Figure S14 · Linked to 2 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Ba-Co hybrid hexacyanidocobaltate framework (4/4a) | {[BaII(4,4'-bpdo)1.5(H2O)3(NO3)][BaII(4,4'-bpdo)1.5(H2O)3(MeOH)][CoIII(CN)6]}.n(solvent)BaII centres with both 4,4'-bpdo and cyanido bridges; [CoIII(CN)6]3- participates in bridging · 4,4'-bpdo plus cyanido bridges | 3D · PristineHybrid organic-inorganic framework, triclinic P-1; cobalt analogue of 3. | p.4 · 2.1 Structural Studies · Figure 2 |
| Ba-Cr hybrid hexacyanidochromate framework (3/3a) | {[BaII(4,4'-bpdo)1.5(H2O)3(NO3)][BaII(4,4'-bpdo)1.5(H2O)3(MeOH)][CrIII(CN)6]}.n(solvent)BaII centres with both 4,4'-bpdo and cyanido bridges; [CrIII(CN)6]3- participates in bridging · 4,4'-bpdo plus cyanido bridges | 3D · PristineHybrid organic-inorganic framework, triclinic P-1; BaII analogue has cyanido bridges and reduced porosity/luminescence relative to Sr-Cr material. | p.4 · 2.1 Structural Studies · Figure 2 |
| Sr-Co hexacyanidocobaltate cationic MOF analogue (2/2a) | {[SrII(4,4'-bpdo)2.5(NO3)][SrII(4,4'-bpdo)2.5(H2O)]}[CoIII(CN)6].n(solvent)SrII nodes; non-coordinated [CoIII(CN)6]3- anions in channels · 4,4'-bpdo | 3D · PristineStructural analogue of 1, triclinic P-1 by SC-XRD; air-dried phase 2a used as comparison for sorption and photoluminescence. | p.4 · 2.1 Structural Studies · Figures S4-S5 |
| Sr-Cr hexacyanidochromate cationic MOF family (1/1a/1deh) | {[SrII(4,4'-bpdo)2.5(NO3)][SrII(4,4'-bpdo)2.5(H2O)]}[CrIII(CN)6].n(solvent)SrII nodes in a cationic metal-organic framework; non-coordinated [CrIII(CN)6]3- anions in channels · 4,4'-bipyridine-N,N'-dioxide (4,4'-bpdo) | 3D · PristineTriclinic P-1; 3D cationic framework with channels along the a axis containing hexacyanidochromate anions and solvent; air-stable 1a and dehydrated 1deh are post-synthetic phases of 1. | p.3 · 2.1 Structural Studies · Figure 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| compound 1 as-synthesised single crystalresearch_0886__mat__sr_cr_mof | Single Crystal · Target Sample · Guest Loaded | mother-liquor crystal protected with Apiezon grease; contains 4MeOH and 2H2O crystallisation solvent | S3 · Synthesis of 1 |
| air-stable 1a bulk polycrystalline powderresearch_0886__mat__sr_cr_mof | Powder · Target Sample · Pristine Framework | air-dried and mass-stabilised at ambient laboratory conditions, 21 C and ca. 40% RH | S3 · Synthesis of 1 and preparation of 1a |
| 1a proton-conductivity pellet with Au contactsresearch_0886__mat__sr_cr_mof | Pellet · Target Sample · Pristine Framework | ground polycrystalline 1a pressed into 5 mm diameter, 0.543 mm thick pellet; both sides coated with Au0.543 mm | S5 · Physical techniques |
| dehydrated 1deh bulk powderresearch_0886__mat__sr_cr_mof | Powder · Target Sample · Pristine Framework | 1a heated to 333 K under vacuum for 24 h with Ar purging; handled under Ar/glovebox | S3 · Preparation of 1deh |
| compound 2 as-synthesised single crystalresearch_0886__mat__sr_co_mof | Single Crystal · Target Sample · Guest Loaded | analogous synthesis to 1 using (bmba)3[CoIII(CN)6] | S4 · Synthesis of 2, 3, and 4 |
| air-dried 2a bulk powderresearch_0886__mat__sr_co_mof | Powder · Target Sample · Pristine Framework | air-dried phase of 2 used for physical experiments | S4 · Synthesis of 2, 3, and 4 |
| compound 3 as-synthesised single crystalresearch_0886__mat__ba_cr_framework | Single Crystal · Target Sample · Guest Loaded | BaII-based system made with Ba(NO3)2 and Cr precursor; mother-solution crystal | S4 · Synthesis of 2, 3, and 4 |
| air-dried 3a bulk powderresearch_0886__mat__ba_cr_framework | Powder · Target Sample · Pristine Framework | air-dried phase of 3 used for physical experiments | S4 · Synthesis of 2, 3, and 4 |
| compound 4 as-synthesised single crystalresearch_0886__mat__ba_co_framework | Single Crystal · Target Sample · Guest Loaded | BaII-based system made with Ba(NO3)2 and Co precursor; mother-solution crystal | S4 · Synthesis of 2, 3, and 4 |
| air-dried 4a bulk powderresearch_0886__mat__ba_co_framework | Powder · Target Sample · Pristine Framework | air-dried phase of 4 used for physical experiments | S4 · Synthesis of 2, 3, and 4 |