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Now showing 1 - 6 of 6
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    Crystal structure of dieuropium(II) dinitridoborate bromide, Eu-2[BN2]Br
    (De Gruyter, 2009) Hoehn, Peter; Prots, Yurii; N/A; Department of Chemistry; Kokal, İlkin; Somer, Mehmet Suat; Master Student; Faculty Member; Department of Chemistry; Graduate School of Sciences and Engineering; College of Sciences; N/A; 178882
    BBrEu2N2, trigonal, R (3) over barm (no. 166), a = 4.0728(3) angstrom, c = 26.589(3) angstrom, V = 382.0 angstrom(3), Z = 3, R-gt(F) = 0.029, wR(ref)(F-2) = 0.072, T = 293 K.
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    Crystal structure of samarium pentagermanide, SmGe5
    (Walter De Gruyter Gmbh, 2009) Meier, Katrin; Kerkau, Alexander; Schwarz, Ulrich; N/A; Koz, Cevriye; Master Student; Graduate School of Sciences and Engineering; N/A
    Ge5Sm, orthorhombic, Minim (no. 7 1), a = 3.9805(7) angstrom, b = 6.1522(9) angstrom, c = 9.839(2) angstrom, V = 240.9 angstrom(3), Z = 2, R-gt(F) = 0.093, wR(ref)(I) = 0.110, T = 295 K.
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    Crystal structure of tetrapotassium diarsenidozincate, K(4)ZnAS(2)
    (Oldenbourg Verlag, 2007) Prots, Yurii; Aydemir, Umut; N/A; Department of Chemistry; Öztürk, Sinan S.; Somer, Mehmet Suat; Master Student; Faculty Member; Department of Chemistry; Graduate School of Sciences and Engineering; College of Sciences; N/A; 178882
    K(4)ZnAS(2), trigonal, R (3) over barm (no. 166), a = 5.7529(6) angstrom c = 26.866(4) angstrom, V = 770.2 angstrom(3), Z = 3, R-gt(F) = 0.040, wR(ref)(F-2) = 0.092, T = 293 K.
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    Crystal structures of strontium octabarium hexakis(dinitridoborate) and europium octabarium hexakis(dinitridoborate), MBa8[BN2](6) (M =Sr, Eu)
    (Walter De Gruyter Gmbh, 2005) N/A; Department of Economics; N/A; Department of International Relations; Öztürk, Serda Selin; Kokal, İlkin; Somer, Murat; Teaching Faculty; Master Student; Faculty Member; Department of Economics; Department of International Relations; College of Administrative Sciences and Economics; Graduate School of Sciences and Engineering; College of Administrative Sciences and Economics; N/A; N/A; 110135
    B6Ba8N12Sr, cubic, Im (3) over barm (no. 229), a = 7.913(1) angstrom, V = 495.6 angstrom(3), Z = 1, R-gt(F) = 0.031, wR(ref)(F-2) = 0.098, T = 293 K. B6Ba8EuN12, cubic, Im (3) over barm (no. 229), a = 7.839(1) angstrom(3), Z = 1 V = 481.81, R-gt(F) = 0.014, wR(ref)(F-2) = 0.056, T = 293 K.
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    Dynamics of spacing adjustment and recovery mechanisms of ABAC-type growth pattern in ternary eutectic systems
    (Elsevier, 2017) N/A; N/A; Department of Mechanical Engineering; Mohagheghi, Samira; Şerefoğlu, Melis; PhD Student; Researcher; Department of Mechanical Engineering; Graduate School of Sciences and Engineering; College of Engineering; 329277; 44888
    In directionally solidified 2D samples at ternary eutectic compositions, the stable three-phase pattern is established to be lamellar structure with ABAC stacking, where A, B, and C are crystalline phases. Beyond the stability limits of the ABAC pattern, the system uses various spacing adjustment mechanisms to revert to the stable regime. In this study, the dynamics of spacing adjustment and recovery mechanisms of isotropic ABAC patterns were investigated using three-phase In-Bi-Sn alloy. Unidirectional solidification experiments were performed on 23.0 and 62.7 mu m-thick samples, where solidification front was monitored in real-time from both sides of the sample using a particular microscopy system. At these thicknesses, the pattern was found to be 2D during steady-state growth, i.e. both top and bottom microstructures were the same. However, during spacing adjustment and recovery mechanisms, 3D features were observed. Dynamics of two major instabilities, lamellae branching and elimination, were quantified. After these instabilities, two key ABAC pattern recovery mechanisms, namely, phase invasion and phase exchange processes, were identified and analyzed. After elimination, ABAC pattern is recovered by either continuous eliminations of all phases or by phase exchange. After branching, the recovery mechanisms are established to be phase invasion and phase exchange.
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    PublicationOpen Access
    Fast and selective adsorption of methylene blue from water using [BMIM][PF6]-incorporated UiO-66 and NH2-UiO-66
    (American Chemical Society (ACS), 2020) Department of Chemical and Biological Engineering; N/A; Kulak, Harun; Keskin, Seda; Uzun, Alper; Kavak, Safiyye; Polat, Hüsamettin Mert; Faculty Member; Department of Chemical and Biological Engineering; Koç University Tüpraş Energy Center (KUTEM) / Koç Üniversitesi Tüpraş Enerji Merkezi (KÜTEM); Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM); Graduate School of Sciences and Engineering; College of Engineering; N/A; 40548; 59917; N/A; N/A
    Incorporation of ionic liquids (ILs) into metal-organic frameworks (MOFs) offers a broad potential in various applications. However, their applications in wastewater treatment have remained unexplored. Here, we investigate their potential in wastewater treatment and demonstrate a new concept of IL incorporation in ligand-functionalized MOFs, introducing IL/FMOFs. The composites were prepared by incorporating 1-n-butyl-3-methylimidazolium hexafluorophosphate, [BMIM][PF6], into UiO-66 and NH2-UiO-66 and tested for the adsorption of methylene blue (MB) and methyl orange (MO) from aqueous solutions. Data showed that NH2-functionalization and [BMIM][PF6] incorporation improved MB removal performance of UiO-66 by 16- and 48-times, as the capacity increased from 84.8 to 144.7 mg g(-1) and 174.1 mg g(-1), respectively. When considering both modifications together, [BMIM][PF6]/NH2-UiO-66 was almost 300 times faster than that of UiO-66, and the capacity exceeded 200 mg g(-1). Data further suggested that IL incorporation almost doubled MB/MO selectivity because of the strong electrostatic interactions and hydrogen bonding between [PF6](-) and MB, and pi-pi interactions between the [BMIM](+) cation and MB molecules. These results are the first to demonstrate the prospect of combining ligand functionalization with IL incorporation for modifying MOFs, introducing IL/FMOF composites for fast and selective removal of pollutants from wastewater.