Primary studyCore evidenceTransport Physics

Two one-dimensional germanium(IV) coordination polymers based on macrocyclic tetraaza[14]annulene with notable semiconducting property

Wang X., Shen X., Zhang Y.-J. et al. · Inorganic Chemistry Communications · 2013 · 45-49

2materials
4samples
4synthesis routes
10measurements
92results
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.

Application RelevanceSupport assessment: High

Both compounds show high decomposition temperatures, which the authors describe as advantageous for semiconducting ability.

Caveat: Decomposition temperatures are reported in SI captions; additional DSC event labels are read from rendered SI figures without ramp-rate/atmosphere metadata.

2 · Structure discussion · Linked to 4 structured results

CaveatSupport assessment: High

No porosity, thermoelectric figure-of-merit, Seebeck coefficient, electrochemical result values, gas sorption measurements, or application-device performance values were reported for the conductive frameworks in the supplied documents.

Caveat: The main text mentions electrochemical measurements on discrete compounds only as indirect analysis, without extractable values.

2 · Conductivity discussion

Structure Property LinkSupport assessment: Medium

The face-to-face/back-to-back stacked tmtaa arrangement and short bridging ligands are proposed to support the notable conductivities.

Caveat: The conductivity is measured on pellets, while the detailed stacking analysis comes from single-crystal structures.

3 · Structure-property discussion · Fig. 1 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

The roughly three-order higher conductivity of compound 2 is attributed to protonic conduction associated with hydroxyl groups on the bridging ligand.

Caveat: The claim is inferential; the paper does not report separate humidity-dependent or isotope-effect proton-conduction experiments.

3 · Conductivity discussion · Linked to 2 structured results

Transport MechanismSupport assessment: High

Compounds 1 and 2 show semiconductor-like charge transport because conductivity rises with increasing temperature over 200-300 K.

Caveat: Device geometry and environmental details are sparse; trend is from pressed-pellet powder compactions.

2 · Conductivity discussion · Fig. 4 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
compound 1, [Ge(tmtaa)(1,4-bdc)]n[Ge(tmtaa)(1,4-bdc)]n; C32H30GeN4O5 including 0.5 ethyl acetate per tmtaa unit in the reported crystal formulaGe(IV) centres in Ge(tmtaa) units · tmtaa = tetraaza[14]annulene; 1,4-benzenedicarboxylate (1,4-bdc)1D · PristineTriclinic P-1 one-dimensional stepwise coordination polymer chain.1 · Abstract
compound 2, [Ge(tmtaa)(2,5-dh-1,4-bdc)]n[Ge(tmtaa)(2,5-dihydroxyl-1,4-bdc)]n; C34H34GeN4O8 including one ethyl acetate per tmtaa unit in the reported crystal formulaGe(IV) centres in Ge(tmtaa) units · tmtaa = tetraaza[14]annulene; 2,5-dihydroxyl-1,4-benzenedicarboxylate1D · PristineTriclinic P-1 one-dimensional stepwise coordination polymer chain.1 · Abstract

Sample register

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

Show 4 sample records
SampleForm and roleProcessing and geometrySource
pressed-pellet powder compaction of compound 1research_0307__mat__mat_1_ge_tmtaa_bdcPellet · Target Sample · Pristine FrameworkBulk powder pressed into pellet for four-probe DC conductivity.2 · Conductivity discussion · Fig. 4
compound 1 orange single crystalsresearch_0307__mat__mat_1_ge_tmtaa_bdcSingle Crystal · Target Sample · Pristine FrameworkAs-synthesised by solution layering; crystals contain ethyl acetate solvate.4 · Reference 31
pressed-pellet powder compaction of compound 2research_0307__mat__mat_2_ge_tmtaa_dhbdcPellet · Target Sample · Pristine FrameworkBulk powder pressed into pellet for four-probe DC conductivity.2 · Conductivity discussion · Fig. 4
compound 2 orange single crystalsresearch_0307__mat__mat_2_ge_tmtaa_dhbdcSingle Crystal · Target Sample · Pristine FrameworkAs-synthesised by method similar to compound 1; crystals contain ethyl acetate solvate.4 · Reference 32