Experimental Seed Combine

Brandenburg, N. R.; Park, J. K.

doi:10.13031/2013.34178

Cited by 5 publications

(7 citation statements)

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“…Two types of pores are formed each along [010] and [001], with diameters of 5.0/11.8 Å and 3.4/11.8 Å respectively for Ga-PMOF (Figure ) and 5.0/11.8 Å and 4.0/12.6 Å respectively for In-PMOF. The diameters were determined using DIAMOND V.3 taking the van der Waals radii of guest molecules into account. , …”

Section: Resultsmentioning

confidence: 99%

Nanoscale Synthesis of Two Porphyrin-Based MOFs with Gallium and Indium

et al. 2016

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Two porphyrin-based metal-organic frameworks (MOFs) containing gallium or indium, [Ga2(OH)2(H2TCPP)]·3DMF·3H2O (Ga-PMOF) and [In2(OH)2(H2TCPP)]·3DMF·4H2O (In-PMOF) (H6TCPP = 4-tetracarboxyphenylporphyrin), were discovered using high-throughput methods. The structure was refined by the Rietveld-method starting from the structure model of Al-PMOF, [Al2(OH)2(H2TCPP)]. The new PMOFs exhibit BET surface areas between 1150 and 1400 m(2) g(-1) and are also porous toward CO2 (Ga-PMOF, 15.2 wt %; In-PMOF, 12.9 wt %). They are thermally stable in air up to 330 °C, but show limited chemical stabilities toward acids and bases. In order to achieve size control, different synthesis routes were investigated, i.e., batch synthesis at different temperatures (yield: In-PMOF-bs-th 96%, Ga-PMOF-bs-th 87%), ultrasound-assisted synthesis (yield: In-PMOF-bs-us 85%), and continuous-flow synthesis (yield: Ga-PMOF-cf 71%). By using these different methods we could control the nucleation rate and the crystal size. The crystal sizes were found to vary about 60 to 160 nm and 70 to 130 nm for Ga- and In-PMOF, respectively, which was proven by dynamic light scattering (DLS), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) measurements.

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Section: Resultsmentioning

confidence: 99%

Nanoscale Synthesis of Two Porphyrin-Based MOFs with Gallium and Indium

et al. 2016

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“…The refined cell parameters and results of the Pawley fits of the other CAU-19-X and M-CAU-19-H (M = Zn, Co) derivatives are shown in Tables S2 and S3 and Figures S19–S29. The diameters of all pores were determined using DIAMOND V.3 taking the van-der-Waals radii of the atoms into account. The variable temperature PXRD (VT-PXRD) measurements were recorded on a STOE Stadi-P combi powder diffractometer (Cu Kα 1 radiation: CAU-18 ; Mo Kα 1 radiation: CAU-19-H ) equipped with a capillary furnace.…”

Section: Methodsmentioning

confidence: 99%

Co-Ligand Dependent Formation and Phase Transformation of Four Porphyrin-Based Cerium Metal–Organic Frameworks

Rhauderwiek

Heidenreich

Reinsch

et al. 2017

Crystal Growth & Design

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KEYWORDS metal organic framework, in situ X-ray diffraction, cerium, porphyrin, phase transformation 3 for nucleation (k n) and crystal growth (k g). The Arrhenius activation energies for the nucleation were determined as 47(2) and 56(3) kJ mol-1 and for crystal growth 45(4) and 58(5) kJ mol-1 for CAU-18 and CAU-19-H, respectively. The induction time (t ind), in which no crystalline products are detected and the total reaction time to achieve full conversion (t com) are shortened at higher temperatures. Furthermore the maximum of the probability of nucleation is shifted to earlier reaction times with increasing temperature.

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“…In Sc-CAU-9-TCPB and Sc-CAU-9-H 2 TCPP, the connectivity of the IBU by the respective ligands lead to pores running along [010] and [001]. The diameters of the pores were calculated using Diamond taking the van der Waals radii into account (Table and Figures S8 and S10). The determined values are slightly larger than the ones in the isostructural Al-MOFs due to the larger ionic radius of Sc 3+ ( r (Sc 3+ ) = 0.745 Å, r (Al 3+ ) = 0.545 Å) .…”

Section: Resultsmentioning

confidence: 99%

Scandium Metal–Organic Frameworks Containing Tetracarboxylate Linker Molecules: Synthesis, Structural Relationships, and Properties

Rönfeldt

Reinsch

Poschmann

et al. 2020

Crystal Growth & Design

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Three structurally related metal–organic frameworks (MOFs) of composition [Sc2(OH)2(L)] denoted Sc-CAU-9-PTCDA, Sc-CAU-9-TCPB, and Sc-CAU-9-H2TCPP containing the tetratopic linker molecules L1 4– = PTCDA4– (perylene-3,4,9,10-tetracarboxylate), L2 4– = TCPB4– (1,2,4,5-tetrakis(4-carboxylatophenyl)-benzene), or L3 4– = H2TCPP4– (meso-tetra(4-carboxylatophenyl)-porphyrin), have been obtained from solvothermal syntheses. The crystal structures were determined from powder X-ray diffraction data. The title compounds contain chains of trans corner-sharing [ScO6] octahedra, connected by the linker molecules to form three-dimensional networks. Depending on the shape of the respective linker the compounds crystallize in a frz or fry topology and with increasing size of the linker, an expansion of the framework and the formation of accessible channels are observed. The compounds were thoroughly characterized and exhibit high thermal stabilities up to 500 °C. Sc-CAU-9-TCPB and Sc-CAU-9-H2TCPP possess permanent porosity toward nitrogen with specific surface areas of asBET = 1350 m2/g and 650 m2/g, respectively. Luminescence measurements revealed a ligand-based emission in the blue spectral region for Sc-CAU-9-TCPB.

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Experimental Seed Combine

Cited by 5 publications

References 0 publications

Nanoscale Synthesis of Two Porphyrin-Based MOFs with Gallium and Indium

Nanoscale Synthesis of Two Porphyrin-Based MOFs with Gallium and Indium

Co-Ligand Dependent Formation and Phase Transformation of Four Porphyrin-Based Cerium Metal–Organic Frameworks

Scandium Metal–Organic Frameworks Containing Tetracarboxylate Linker Molecules: Synthesis, Structural Relationships, and Properties

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