Dhara B., Kumar V., Gupta K. et al. · ACS Omega · 2017 · 4488-4493
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.
A possible coordination-track transport pathway is discussed, but the authors state that no appreciable conductivity change under 1 sun irradiation was observed and photocurrent transients would be needed for a stronger conclusion.
p004 · Results and Discussion · Linked to 1 structured result
Fe-BTC-Cr is described as a truly/homogeneously bimetallic CP rather than a physical mixture, based on elemental mapping and near-feed Fe/Cr ratios.
Caveat: PXRD notes possible impurity phases inherent to polycrystalline xerogels.
p002-p003 · Results and Discussion · Figures 4 and S4 · Linked to 2 structured results
Moving from monometallic Fe-BTC or Cr-BTC to bimetallic Fe-BTC-Cr strongly enhances carrier mobility, with the 1:1 Fe/Cr composition reaching 15 cm2 V-1 s-1.
Caveat: Hall analysis includes anomalous Hall contribution because the samples are paramagnetic.
p001-p004 · Abstract; Results and Discussion · Table 1 · Linked to 3 structured results
The bimetallic Fe-BTC-Cr 1:1 sample has higher N2 uptake and reported BET surface area than the monometallic parents.
Caveat: Only Fe-BTC-Cr BET area is reported in text/SI; parent uptake values here are approximate figure-axis readings.
p002 · Results and Discussion · Figure 3 · Linked to 4 structured results
EIS-derived conductivities reproduce the same trend as four-probe measurements, with bimetallic Fe-BTC-Cr more conductive than monometallic parents.
Caveat: Absolute EIS and four-probe conductivity values differ, consistent with the authors' discussion that measurement method can change reported conductivity.
p004 · Results and Discussion · Figure 7 · Linked to 4 structured results
The authors attribute enhanced transport to formation of a hybrid donor-acceptor/p-n assembly that lowers the band gap in bimetallic Fe-BTC-Cr.
Caveat: The mechanism is inferred from optical band-gap changes and Hall type assignments, not from direct band-structure measurement.
p003-p005 · Results and Discussion; Conclusions · Figure 5 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Cr-BTC coordination polymer | Cr-BTCCr(III) · 1,3,5-benzenetricarboxylic acid (BTC) | unknown · PristineMonometallic Cr-BTC xerogel; FESEM shows globular/fibrous patterns. | p002 · Results and Discussion · Figures 1-2 |
| Fe-BTC coordination polymer | Fe-BTCFe(III) · 1,3,5-benzenetricarboxylic acid (BTC) | unknown · PristineMonometallic Fe-BTC xerogel; PXRD resembles the reported Fe-BTC structure and FESEM shows micrometre-sized irregular crystalline blocks. | p002 · Results and Discussion · Figures 1-2; Figure S3 |
| Bimetallic Fe-BTC-Cr coordination polymer | Fe-BTC-CrFe(III), Cr(III) · 1,3,5-benzenetricarboxylic acid (BTC) | unknown · PristineBimetallic xerogel; FESEM shows cuboids resembling Fe-BTC, TEM shows a layered structure, SAED indicates crystallinity, PXRD adopts an Fe-BTC-like structure, and EDXS mapping shows homogeneous Fe/Cr distribution. | p002 · Results and Discussion · Figures 2-4; Figures S2-S4 |
| Mechanical mixture of Fe-BTC and Cr-BTC | Fe-BTC + Cr-BTCFe(III), Cr(III) in separate phases · 1,3,5-benzenetricarboxylic acid (BTC) | unknown · CompositePhysical 1:1 mechanical mixture of Fe-BTC and Cr-BTC, used as a control rather than a self-assembled bimetallic framework. | p003 · Results and Discussion · Figure 5b; Figure S5 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Cr-BTC xerogel pressed pelletresearch_0049__mat__mat_cr_btc | Pellet · Pristine Control · Pristine Framework | Gel converted to xerogel by vacuum drying at room temperature; xerogel pressed into bar-shaped pellets for transport measurements. | p002 · Results and Discussion |
| Fe-BTC xerogel pressed pelletresearch_0049__mat__mat_fe_btc | Pellet · Pristine Control · Pristine Framework | Gel converted to xerogel by vacuum drying at room temperature; xerogel pressed into bar-shaped pellets for transport measurements. | p005 · Materials and Methods |
| Fe-BTC-Cr 1:1 xerogel pressed pelletresearch_0049__mat__mat_fe_btc_cr | Pellet · Target Sample · Mixed Metal | Bimetallic Fe/Cr = 1:1 xerogel pressed into pellets for electrical, EIS and Hall measurements. | p005 · Materials and Methods |
| Fe-BTC-Cr 1:2 xerogel pressed pelletresearch_0049__mat__mat_fe_btc_cr | Pellet · Target Sample · Mixed Metal | Bimetallic Fe/Cr = 1:2 xerogel pressed into pellets for electrical and Hall measurements. | p002 · Results and Discussion |
| Fe-BTC-Cr 2:1 xerogel pressed pelletresearch_0049__mat__mat_fe_btc_cr | Pellet · Target Sample · Mixed Metal | Bimetallic Fe/Cr = 2:1 xerogel pressed into pellets for electrical and Hall measurements. | p002 · Results and Discussion |
| 1:1 Fe-BTC + Cr-BTC mechanical mixture pressed pelletresearch_0049__mat__mat_mech_mix | Pellet · Pristine Control · Composite | Mechanical 1:1 mixture of the two monometallic CPs, used in I-V and Tauc controls. | p004 · Supporting Information · Figure S5 |