Primary studyCore evidenceTheory Transport

Air-Stability and Carrier Type in Conductive M3(Hexaaminobenzene)2,(M = Co, Ni, Cu)

Hinckley A.C., Park J., Gomes J. et al. · Journal of the American Chemical Society · 2020 · 11123-11130

3materials
6samples
3synthesis routes
11measurements
63results
5claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Phase AssignmentSupport assessment: Medium

The Co-HAB, Ni-HAB and Cu-HAB samples share the same MOF crystal structures and comparable particle sizes, enabling metal-cation effects to be compared.

Caveat: Main paper states same structure and particle-size comparability; full PXRD pattern matching is shown only graphically in SI.

11123 · Introduction · Linked to 3 structured results

Structure Property LinkSupport assessment: High

Metal d-orbital occupancy and orientation modulate carrier delocalisation, mobility and air stability in the M-HAB series.

Caveat: The d-orbital argument is a model-supported interpretation, not a directly measured orbital occupancy.

11128 · Conclusion · Figure 3; Table 2 · Linked to 6 structured results

Transport MechanismSupport assessment: High

Co-HAB and Cu-HAB exhibit n-type dominated transport under nitrogen and ambient conditions, whereas Ni-HAB switches from n-type in nitrogen to p-type under ambient conditions.

Caveat: Co and Cu ambient/nitrogen Seebeck magnitudes are partly figure-estimated, but the carrier-type claim is stated explicitly in the abstract and conclusion.

11123 · Abstract · Linked to 5 structured results

Transport MechanismSupport assessment: High

Temperature-dependent transport in the pressed M-HAB pellets is consistent with thermally activated hopping transport.

Caveat: Ambient Ni-HAB and Cu-HAB are well described by the model only below about 370 K.

11126 · Results and Discussion · Figure 2B · Linked to 6 structured results

Transport MechanismSupport assessment: High

Atmospheric oxygen, rather than water alone, is predominantly responsible for ambient changes in Seebeck coefficient and conductivity.

Caveat: Controlled humidity experiment removes atmospheric oxygen but does not independently vary oxygen without water in the same figure.

11127 · Experimental determination of electronic structure · Figure 4 · Linked to 1 structured result

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
Co-HABBrowse family: Co₃(HAB)₂ / Co–HABCo3(hexaaminobenzene)2 / M3(HAB)2 with M = Codivalent cobalt cations · hexaaminobenzene (HAB)2D · PristineSquare-planar M-HAB conductive MOF; same crystal packing structure as the Ni and Cu analogues.11123 · Introduction · Figure 1A
Cu-HABBrowse family: Cu₃(HAB)₂ / Cu–HABCu3(hexaaminobenzene)2 / M3(HAB)2 with M = Cudivalent copper cations · hexaaminobenzene (HAB)2D · PristineSquare-planar M-HAB conductive MOF; same crystal packing structure as the Co and Ni analogues.11128 · Conclusion
Ni-HABBrowse family: Ni₃(HAB)₂ / Ni–HABNi3(hexaaminobenzene)2 / M3(HAB)2 with M = Nidivalent nickel cations · hexaaminobenzene (HAB)2D · PristineSquare-planar M-HAB conductive MOF; same crystal packing structure as the Co and Cu analogues.11123 · Introduction · Figure 1A

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 6 sample records
SampleForm and roleProcessing and geometrySource
Co-HAB DFT modelresearch_0495__mat__mat_co_habModel · Model System · Model39-atom periodic hexagonal model cell; DFT+U and fragment charge-transfer calculationsS5 · Computational details
Co-HAB pressed-powder pelletresearch_0495__mat__mat_co_habPellet · Target Sample · Pristine Frameworkblack powder cold pressed into pellet; measured under nitrogen, ambient air and controlled humiditysilicon wafer with double-sided polyimide tape for conductivity device · pellet thickness measured with a micrometer; numeric value not reportedS3 · Electrical conductivity measurement · Scheme 1
Cu-HAB DFT modelresearch_0495__mat__mat_cu_habModel · Model System · Model39-atom periodic hexagonal model cell; DFT+U and fragment charge-transfer calculationsS5 · Computational details
Cu-HAB pressed-powder pelletresearch_0495__mat__mat_cu_habPellet · Target Sample · Pristine Frameworkdark-blue powder cold pressed into pellet; measured under nitrogen, ambient air and controlled humiditysilicon wafer with double-sided polyimide tape for conductivity device · pellet thickness measured with a micrometer; numeric value not reported11124 · Results and Discussion · Figure 1B,C
Ni-HAB DFT modelresearch_0495__mat__mat_ni_habModel · Model System · Model39-atom periodic hexagonal model cell; DFT+U and fragment charge-transfer calculationsS5 · Computational details
Ni-HAB pressed-powder pelletresearch_0495__mat__mat_ni_habPellet · Target Sample · Pristine Frameworkblack powder cold pressed into pellet; measured under nitrogen, ambient air and controlled humiditysilicon wafer with double-sided polyimide tape for conductivity device · pellet thickness measured with a micrometer; numeric value not reported11124 · Results and Discussion · Figure 1B,C