Primary studyCore evidenceSynthesis Structure

Nanopore-induced host-guest charge transfer phenomena in a metal-organic framework

Yamamoto S., Pirillo J., Hijikata Y. et al. · Chemical Science · 2018 · 3282-3289

6materials
12samples
7synthesis routes
22measurements
39results
7claims 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.

CaveatSupport assessment: High

The humid I-V response is not considered an intrinsic conductivity of compounds 1 or 2 because both samples decompose and lose crystallinity after 24 h at 97% RH.

Caveat: Humid I-V curves still show linear response for 1 and hysteresis for 2.

SI p.9 · S7. Electrical conductivity · Fig. S8 · Linked to 2 structured results

Phase AssignmentSupport assessment: High

The crystal-sponge loading route produced phase-pure Mn-MOF guest crystals for compounds 1 and 2.

Caveat: Compound 2 required synchrotron diffraction because initial laboratory single-crystal XRD quality was inadequate.

SI p.6 · S5. PXRD · Fig. S5 · Linked to 3 structured results

Structure Property LinkSupport assessment: High

MOF nanopore confinement and even donor distribution promote donor-to-host charge transfer that does not occur in simple AQDC/donor control mixtures.

Caveat: The resulting materials remain insulating in this paper despite charge-transfer evidence.

p.8 · Conclusions · Linked to 5 structured results

Structure Property LinkSupport assessment: Medium

TMPDA-loaded compound 2 shows a much larger charge-transfer/radical contribution than TTF-loaded compound 1.

Caveat: Charge estimates intentionally ignore possible antiferromagnetic coupling between donor, acceptor and Mn7 clusters; authors call the result qualitative.

p.6 · Experimental evidence of charge transfer · Linked to 5 structured results

Synthesis MechanismSupport assessment: High

The Mn-MOF guest-loading strategy is size selective; larger BEDT-TTF and TMTSF donors diffuse slowly and only surface-dope crystals, preventing isolation of phase-pure complexes.

Caveat: Detailed attempted-loading recipe for BEDT-TTF/TMTSF is not provided.

SI p.8 · S6. Selective impregnation · Table S3 · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

TD-DFT assigns the experimental low-energy CT absorption mainly to D-A-A-D tetrameric motifs and nanopore-imposed steric geometry.

Caveat: Computational models are fragment/tetramer models, not periodic transport calculations.

SI p.18 · S11. Theoretical simulations · Fig. S17 · Linked to 3 structured results

Transport MechanismSupport assessment: High

Both reported charge-transfer Mn-MOF complexes are insulating under vacuum, with pellet conductivity below 10^-12 S/cm.

Caveat: Measured on pressed pellets, not single crystals, because donor-loaded crystals cracked.

SI p.9 · S7. Electrical conductivity · Linked to 2 structured results

Material identities

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

MaterialCompositionStructure contextSource
AQDC donor reaction and computational model systemsNot specifiedNone for free ligand/donor reactions; partial Mn-AQDC model in DFT section · 2,7-AQDC, TTF, TMPDA and model D-A or D-A-A-D clusters0D · Model SystemControl reactions and DFT models used to compare non-MOF donor-acceptor behaviour.p.7 · The confinement effect of the micropores · Fig. 5
BEDT-TTF doped Mn-MOF attemptMn7(AQDC)7(DMA)6 > BEDT-TTF0.20Heptanuclear Mn(II) MOF nodes · AQDC/DMA host with surface-doped BEDT-TTF donor3D · UnknownAttempted donor impregnation; only surface doping observed and no phase-pure charge-transfer complex isolated.SI p.8 · S6. Selective impregnation · Table S3
Mn-MOF{Mn7(2,7-AQDC)6(2,6-AQDC)(DMA)6}Heptanuclear Mn(II) secondary building units · 2,7-anthraquinone dicarboxylate and 2,6-anthraquinone dicarboxylate; coordinated DMA3D · PristineFlexible redox-active MOF with anthraquinone acceptor groups and nanochannels.p.3 · Results and discussion - Structural perspectives
Mn-MOF 7TMPDA, compound 2{Mn7(2,7-AQDC)6(2,6-AQDC)(DMA)4(H2O)2(TMPDA)7}Heptanuclear Mn(II) secondary building units inherited from Mn-MOF · AQDC anthraquinone linkers plus seven TMPDA guest donors per Mn7 formula; two waters replace two DMA ligands3D · PristineGuest-loaded Mn-MOF charge-transfer complex; TMPDA donors form D-A-A-D columns and isolated D-A-A-D units.p.2 · Abstract / Introduction
Mn-MOF 5TTF, compound 1{Mn7(2,7-AQDC)6(2,6-AQDC)(DMA)6(TTF)5}Heptanuclear Mn(II) secondary building units inherited from Mn-MOF · AQDC anthraquinone linkers plus five tetrathiafulvalene guest donors per Mn7 formula3D · PristineGuest-loaded Mn-MOF charge-transfer complex; TTF donors occupy Type I, II and III sites, including D-A-A-D columns.p.2 · Abstract / Introduction
TMTSF doped Mn-MOF attemptMn7(AQDC)7(DMA)6 > TMTSF0.34Heptanuclear Mn(II) MOF nodes · AQDC/DMA host with surface-doped TMTSF donor3D · UnknownAttempted donor impregnation; only surface doping observed and no phase-pure charge-transfer complex isolated.SI p.8 · S6. Selective impregnation · Table S3

Sample register

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

Show 12 sample records
SampleForm and roleProcessing and geometrySource
TMPDA plus AQDC reaction residueresearch_0534__mat__aqdc_donor_model_systemsPowder · Model System · ModelAQDC ligand and TMPDA heated in hot DMF at 120 degC for 1 h, then DMF removed.p.4 · Physical measurements
TTF plus AQDC reaction residueresearch_0534__mat__aqdc_donor_model_systemsPowder · Model System · ModelAQDC ligand and TTF heated in hot DMF at 120 degC for 1 h, then DMF removed.p.4 · Physical measurements
BEDT-TTF doped Mn-MOF crystalsresearch_0534__mat__bedt_ttf_doped_mn_mofPowder · Target Sample · DopedAttempted spontaneous incorporation; diffusion slow and only crystal surface doped.SI p.7 · S6. Selective impregnation · Fig. S7
DFT models from compound 1research_0534__mat__aqdc_donor_model_systemsModel · Model System · ModelDimer D1a/D2a and tetramer T1a models from the compound 1 crystal structure.SI p.14 · S11. Theoretical simulations · Fig. S13
DFT models from compound 2research_0534__mat__aqdc_donor_model_systemsModel · Model System · ModelDimer D1b/D2b/D3b and tetramer T1b/T2b/T3b models from the compound 2 crystal structure.SI p.14 · S11. Theoretical simulations · Fig. S13
Free 2,7-AQDC, TTF and TMPDA in DMF electrolyteresearch_0534__mat__aqdc_donor_model_systemsUnknown · Model System · ModelSaturated DMF solutions with 1.0 mol/L tetrabutylammonium hexafluorophosphate electrolyte.SI p.4 · S3. Cyclic voltammetry · Fig. S2
As-prepared Mn-MOF crystalsresearch_0534__mat__mn_mofSingle Crystal · Pristine Control · Pristine FrameworkCollected from solvothermal product, washed with hot DMF and used without solvent exchange or activation.p.3 · Preparation of the materials
Compound 2 Mn-MOF 7TMPDA crystalsresearch_0534__mat__mn_mof_tmpda_2Single Crystal · Target Sample · Guest LoadedPhase-pure guest crystals after CH2Cl2 guest loading and sublimation removal of excess TMPDA.p.3 · Preparation of the materials
Pressed pellet of compound 2research_0534__mat__mn_mof_tmpda_2Pellet · Target Sample · Guest LoadedPressed pellet prepared because cracked crystals were unsuitable for regular single-crystal transport geometry.SI p.9 · S7. Electrical conductivity · Fig. S8
Compound 1 Mn-MOF 5TTF crystalsresearch_0534__mat__mn_mof_ttf_1Single Crystal · Target Sample · Guest LoadedPhase-pure guest crystals after CH2Cl2 guest loading and sublimation removal of excess TTF.p.3 · Preparation of the materials
Pressed pellet of compound 1research_0534__mat__mn_mof_ttf_1Pellet · Target Sample · Guest LoadedPressed pellet prepared because cracked crystals were unsuitable for regular single-crystal transport geometry.SI p.9 · S7. Electrical conductivity · Fig. S8
TMTSF doped Mn-MOF crystalsresearch_0534__mat__tmtsf_doped_mn_mofPowder · Target Sample · DopedAttempted spontaneous incorporation; diffusion slow and only crystal surface doped.SI p.7 · S6. Selective impregnation · Fig. S7