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We appreciate support from the group of Prof Dr. Sonnichsen (University of Kiel) for NMR measurements and thank Dr. Helge Reinsch (CAU Kiel) and Dr. Michael Wharmby (DESY) for helpful discussions. The financial support by the province of Schleswig-Holstein is highly appreciated.

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Gosch, JonasAuthor

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Synthesis, Structure, and Characterization of Defect-free [Hf6(μ3-O)4(μ3-OH)4(C4H2O4)6] (Hf-UiO-66-Fum)

Publicated to:Zeitschrift Fur Anorganische Und Allgemeine Chemie. 644 (24): 1771-1776 - 2018-12-31 644(24), DOI: 10.1002/zaac.201800338

Authors: Jacobsen, Jannick; Gosch, Jonas; Stock, Norbert

Affiliations

Christian Albrechts Univ Kiel, Inst Anorgan Chem, Max Eyth Str 2, D-24118 Kiel, Germany - Author

Abstract

The reaction of HfCl4 with fumaric acid (C4H4O4, H(2)Fum) in a DMF/HCOOH solvent mixture at 120 degrees C for 24 h results in the formation of a defect-free sample of Hf-UiO-66-Fum with UiO-66 structure type. Treatment of the (as)-synthesized sample in boiling ethanol followed by a thermal treatment at 70 degrees C leads to a sample of composition [Hf-6(mu(3)-O)(4)(mu(3)-OH)(4)(Fum)(6)]center dot 18H(2)O center dot 2EtOH. In the crystal structure the hexanuclear clusters {Hf-6(mu(3)-O)(4)(mu(3)-OH)(4)} are twelve-fold connected by C4H2O42- ions to form the framework with the fcu topology. This cluster connectivity was confirmed by a combination of characterization techniques methods, i.e. CHN analyses, N-2 sorption as well as H-1-NMR spectroscopic and thermogravimetric measurements. The MOF shows a thermal stability of T = 390 degrees C, a specific BET surface area of 389 m(2)center dot g(-1) and a water uptake of 204 mg center dot g(-1). The crystal structure was determined from powder X-ray diffraction (PXRD) data, employing the Rietveld method. The compound crystallizes in the cubic space group Pn3 and is isostructural to Zr-UiO-66-Fum. Only a small increase of the lattice parameter a from 17.8309(4) to 17.87978(14) angstrom is observed.

Keywords

AdsorptionCrystal structureDefect-freDesigHafniumHexanuclear clusterMetal organic frameworks (mofs)Metal-organic frameworksModulated synthesisUio-66

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Zeitschrift Fur Anorganische Und Allgemeine Chemie, and although the journal is classified in the quartile Q3 (Agencia WoS (JCR)), its regional focus and specialization in Chemistry, Inorganic & Nuclear, give it significant recognition in a specific niche of scientific knowledge at an international level.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-21:

  • WoS: 9
  • Scopus: 9

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-21:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 7.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 7 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 0.25.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Germany.