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Ken Inge profile

Andrew Kentaro Inge

Researcher

Visa sidan på svenska
Works at Department of Materials and Environmental Chemistry
Email andrew.inge@mmk.su.se
Visiting address Svante Arrhenius väg 16 C
Room C 570
Postal address Institutionen för material- och miljökemi 106 91 Stockholm

About me

Ken Inge is a researcher at the Department of Materials and Environmental Chemistry (MMK) at Stockholm University. He received is Master of Science in 2007 at the University of Bristol and his Ph.D. in 2012 at Stockholm University.  He was postdoc at the University of Kiel, Germany before returning to Stockholm University in 2015. Research interests include the synthesis and crystal structure determination and transformations of porous inorganic oxides, metal-organic frameworks (MOFs), and metallodrugs. 

Publications

A selection from Stockholm University publication database
  • 2017. Yunchen Wang (et al.). Chemical Communications 53 (52), 7018-7021

    Bismuth subgallate has been used in wound and gastrointestinal therapy for over a century. The combination of continuous rotation electron diffraction and sample cooling finally revealed its structure as a coordination polymer. The structure provides insight regarding its formula, poor solubility, acid resistance and previously unreported gas sorption properties.

  • 2016. A. Ken Inge (et al.). Crystal Growth & Design 16 (12), 6967-6973

    A novel open-framework germanate, vertical bar NC2H8 vertical bar vertical bar N2C6H18 vertical bar, [Ge7O14.5F2].4H(2)O denoted SU-65 (SU = Stockholm University), with 24-ring channels and a very low framework density of 8.9 Ge atoms per 1000 angstrom(3) was synthesized under hydro-solvothermal conditions. The framework of SU-65 is built of 5-connected Ge-7 clusters decorating the fee net and is a framework orientation isomer to ASU-16. Half of the 8- and 12-rings in ASU-16 are instead 10-rings in SU-65 due to the different orientations of half of the clusters in the crystal structure. Flexibility of the frameworks is also influenced by the orientation of the clusters. The unique unit cell angle in SU-65 changes upon heating, unlike ASU-16 which only undergoes changes in unit cell lengths. SU-65 undergoes significant structural changes at 180 degrees C in a vacuum, forming SU-65ht. The crystal structure of SU-65ht was investigated by rotation electron diffraction, X-ray powder diffraction, and infrared spectroscopy. Through these techniques it was deduced that SU-65ht has similar clusters, symmetry, and topology as SU-65, but one of the unit cell lengths is shortened by approximately 5 A. This corresponds to a 22% decrease in unit cell volume.

  • 2009. Charlotte Bonneau (et al.). Inorganic Chemistry 48 (21), 9962-9964

    We present a novel open-framework oxide material constructed from Ge10(O,OH)28 (Ge10) oxide clusters prepared via a nonsurfactant route. The material shows two distinct pore windows of 9.43 and 4.65 Å and a low framework density structure of 12.7 Ge atoms per 1000 Å3. The topological study leads to the recognition of a newly observed trinodal 6,7-heterocoordinated net related to the 7-coordinated swh net. The structure displays large rigid cylinders showing features indicating a growth mechanism by hard-sphere packing of the inorganic moiety similar to that observed in mesoporous materials.

  • 2012. Andrew Kentaro Inge (et al.). Crystal Growth & Design 12 (10), 4853-4860

    A novel open-framework germanate SU-74 containing intersecting 10- and 12-ring channels was prepared by hydrothermal synthesis using 2-methylpentamethylenediamine (MPMD) or 1-(2-aminoethyl)piperazine (AEP) as the organic structure directing agent (SDA). The framework structure of SU-74-MPMD was solved from X-ray powder diffraction (XRPD) data using powder charge-flipping (pCF). The guest species H2MPMD2+, NH4+ cations and water molecules were located in the voids using real-space simulated annealing. SU-74-MPMD contains 51 non-hydrogen atoms in its asymmetric unit and is one of the most complex framework structures solved by XRPD. The structure of SU-74-AEP was solved by single crystal synchrotron X-ray diffraction. SU-74-MPMD and SU-74-AEP have the same framework structure. The location of the NH4+ cations in both structures is similar, while the positions of the SDAs in the pores are different. SU-74 follows the fcu-11-P21/c net. The underlying topology of SU-74 is compared to those of other Ge10 structures containing additional GeO4 tetrahedra. The presence of additional tetrahedra can significantly affect the framework topology through the addition of edges between the Ge10 nodes.

  • 2011. Bing Guo (et al.). Inorganic Chemistry 50 (1), 201-207

    The systematic exploration of the phase diagram of the GeO2-1,6-diaminohexane-water-pyridine-HF system has allowed the identification of specific roles of the HF, H2O contents, and HF/H2O ratio in the formation of Ge7X19 (Ge7), Ge9X25−26 (Ge9), and Ge10X28 (Ge10) clusters (X = O, OH, F). This work has led to the discovery of two novel structures with extra-large 18-membered rings accommodating 1,6-diaminohexane (DAH): SU-63, |1.5H2DAH|[Ge7O14X3]·2H2O, a layered germanate constructed from Ge7 clusters with the Kagom topology, and SU-64, |11H2DAH|[Ge9O18X4][Ge7O14X3]6·16H2O, a germanate built of two-dimensional slabs containing both Ge7 and Ge9 clusters (X = OH or F). We also put SU-64 in context with previously reported cluster germanate compounds with related topologies by means of a simple crystal deconstruction study.

  • 2012. Liqiu Tang (et al.). Crystal Growth & Design 12 (7), 3714-3719

    A novel open-framework silicogermanate SU-JU-14 (Stockholm University-Jilin University-Number 14), vertical bar NH3CH2CH2NH3 vertical bar(3)[Ge6.40Si0.60O15(OH)](2)[Ge0.73Si3.27O8], was synthesized by using ethylenediamine as the structure-directing agent under solvothermal conditions. Single-crystal structure analysis reveals that the crystal structure of SU-JU-14 consists of extended 24-ring channels built from [(Ge,Si)(7)O12O6/2(OH)](3-) [(Ge,Si)(7)] clusters and unbranched zweier silica double chains [Ge0.73Si3.27O4O8/2]. Charge neutrality is achieved by diprotonated ethylenediamine guest molecules. The structure consists of stacking faults of layered arrays in two different configurations along the a-axis. SU-JU-14 was characterized by X-ray diffraction, X-ray energy dispersive spectroscopy, scanning electron microscopy, nuclear magnetic resonance, inductively coupled plasma, and thermogravimetric analyses. Crystallographic data: monoclinic, space group C2/c, and unit cell parameters: a = 35.625 (7) angstrom, b = 28.580 (6) angstrom, c = 10.403 (2) angstrom, and beta = 98.30 (3)degrees.

  • 2013. A. Ken Inge (et al.). Journal of applied crystallography 46, 1094-1104

    The crystal structure of a novel open-framework gallogermanate, SU-66 {|(C6H18N2)(18)(H2O)(32)|[Ga4.8Ge87.2O208]}, has been solved from laboratory X-ray powder diffraction (XPD) data by using a direct-space structure solution algorithm and local structural information obtained from infrared (IR) spectroscopy. IR studies on 18 known germanates revealed that the bands in their IR spectra were characteristic of the different composite building units (CBUs) present in the structures. By comparing the bands corresponding to Ge-O vibrations in the IR spectra of SU-66 with those of the 18 known structures with different CBUs, the CBU of SU-66 could be identified empirically as the Ge-10(O,OH)(27) cluster (Ge-10). The unit cell and space group (extinction symbol P--a; a = 14.963, b = 31.593, c = 18.759 angstrom) were determined initially from the XPD pattern and then confirmed by selected-area electron diffraction. The structure of SU-66 was solved from the XPD data using parallel tempering as implemented in FOX [Favre-Nicolin & Cerny (2002). J. Appl. Cryst. 35, 734-743] by assuming P2(1)ma symmetry and two Ge-10 clusters in the asymmetric unit. Rietveld refinement of the resulting structure using synchrotron XPD data showed the framework structure to be correct and the space group to be Pmma. The framework has extra-large (26-ring) onedimensional channels and a very low framework density of 10.1 Ge/Ga atoms per 1000 angstrom(3). SU-66, with 55 framework atoms in the asymmetric unit, is one of the more complicated framework structures solved from XPD data. Indeed, 98% of the reflections were overlapping in the XPD pattern used for structure solution. Tests on other open-framework germanates (SU-62, SU-65, SU-74, PKU-12 and ITQ-37) for which the XPD data, unit cell, space group and IR spectra were available proved to be equally successful. In a more complex case (SU-72) the combination of FOX and powder charge flipping was required for structure solution.

  • 2016. Andrew Kentaro Inge (et al.). Journal of the American Chemical Society 138 (6), 1970-1976

    A bismuth-based metal-organic framework (MOP), [Bi(BTC)(H2O)]center dot 2H(2)O center dot MeOH denoted CAU-17, was synthesized and found to have an exceptionally complicated structure with helical Bi-O rods cross-linked by 1,3,5-benzenetricarboxylate (BTC3-) ligands. Five crystallographically independent 1D channels including two hexagonal channels, two rectangular channels, and one triangular channel have accessible diameters of 9.6, 9.6, 3.6, 3.6, and 3.4 angstrom, respectively. The structure is further complicated by twinning. Rod-incorporated MOF structures typically have underlying nets with only one unique node and three or four unique edges. In contrast, topological analysis of CAU-17 revealed unprecedented complexity for a MOF structure with 54 unique nodes and 135 edges. The complexity originates from the rod packing and the rods themselves, which are related to aperiodic helices.

Show all publications by Andrew Kentaro Inge at Stockholm University

Last updated: October 22, 2017

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