Let’s Talk about MOFs—Topology and Terminology of  Metal-Organic Frameworks and Why We Need Them

Öhrström, Lars

doi:10.3390/cryst5010154

Cited by 78 publications

(34 citation statements)

References 26 publications

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“…Alternatively, this may mean that if the scientific terminologies developed so far to serve some specific purposes are muddled, then one has left with no choice to separate out, for instance, which are inorganic, which are organic, which are noncovalent, and which are organometallic chemistry, and what are the similarities and differences between them. This view is not very unusual since terminology deals with all technical vocabulary excluding names of individual compounds …”

Section: Discussionmentioning

confidence: 99%

“…In these, the authors have provided the physical significance and chemical relevance of why should one name a bond with a name. Similarly as above, Öhrström has discussed his opinion on the controversy that lies between metal‐organic framework and coordination polymer in his article entitled ‘Let's talk about MOFs–topology and terminology of metal‐organic frameworks and why we need them’; the reader may find the above articles as interesting reads.…”

Section: Discussionmentioning

confidence: 99%

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Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Varadwaj

2017

Helv. Chim. Acta

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Methylammonium lead trihalide perovskite solar cells (CH3NH3PbY3, where Y = I(3 − x)Brx = 1 – 3, I(3 − x)Clx = 1 – 3, Br(3 − x)Clx = 1 – 3, and IBrCl) are photonic semiconducting materials. Researches on various fundamental and technological aspects of these materials are extensively on‐going to make them stable environmentally and for commercialization. Research studies addressing these materials as organometallic are massively and repeatedly appearing in reputable and high‐profile peer‐reviewed journal publications (viz. Energy and Environmental Science, Nature Chemistry, Nature Communication, Advanced Materials, Science, ACS Nano, ACS Energy Letters, and in many other chemistry and materials based international journals). Herein, I candidly addresses the question: whether should scientists in the perovskite and nanomaterials science communities refer CH3NH3PbY3, as well as other perovskite derivatives falling into the same category, as organometallic?

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Varadwaj

2017

Helv. Chim. Acta

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“…In particular, by reaction of 1 ⋅2 EtOH with AgClO 4 we obtained {[Fe 4 (pPy) 2 (dpm) 6 ] 2 Ag}(ClO 4 ) ( 2 ), a 3D metal–organic framework (MOF) crystallizing in a cubic space group. Its crystal structure consists of two interlocked dia networks, according to IUPAC nomenclature, with silver(I) ions as the tetrahedral nodes coordinated by four pyridyl nitrogen atoms of Fe 4 complexes. By performing magnetic measurements and W‐band ( ν ≈94 GHz) EPR spectroscopy we found that the Fe 4 units retain the same magnetic behaviour as in 1 ⋅2 EtOH.…”

Section: Introductionmentioning

confidence: 99%

Diamondoid Structure in a Metal–Organic Framework of Fe₄ Single‐Molecule Magnets

Rigamonti

Cotton

Nava

et al. 2016

Chemistry A European J

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A 3D metal-organic framework (MOF) having single-molecule magnet (SMM) linkers was prepared in crystalline form by using a tetrairon(III) complex functionalised with two divergent pyridyl groups, namely [Fe4 (pPy)2 (dpm)6 ] (1; H3 pPy=2-(hydroxymethyl)-2-(pyridin-4-yl)propane-1,3-diol, Hdpm=dipivaloylmethane). Reaction of 1 with silver(I) perchlorate afforded {[Fe4 (pPy)2 (dpm)6 ]2 Ag}ClO4 (2), which crystallises in a cubic face-centred lattice and exhibits two interlocked diamondoid networks. In 2, the SMMs act as linear ditopic synthons, and silver(I) ions as tetrahedral nodes coordinated by four pyridyl nitrogen atoms. The magnetic properties of 1 (S=5 and D≈-0.4 cm(-1) in the ground spin state) are largely preserved in 2, which shows slow magnetic relaxation with an anisotropy barrier of Ueff /kB =11.46(10) K in zero field and 14.25(8) K in an applied field of 1 kOe. However, crystal symmetry triggers highly noncollinear magnetic anisotropy contributions oriented at 109.47° from each other along the threefold axes of AgN4 tetrahedra, a unique scenario fully confirmed by a single-crystal cantilever torque magnetometry investigation. Magnetisation curves down to 0.03 K demonstrated the occurrence of a wide hysteresis loop when the magnetic field was swept along one of the four Ag-N bonds. By symmetry, the crystalline compound can then be persistently magnetised parallel or antiparallel to the four main diagonals of the unit cell, although the crystals have no overall second-order anisotropy.

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“…Controlling network interpenetration. Interpenetration, where the empty space described by the crystalline framework accommodates one or more additional networks 94 and which can adversely affect pore volume and impact internal surface area 95 , is another aspect of 3D COFs that requires improved understanding and synthetic control. Whereas interpenetration in 3D COFs has typically been determined by structural modeling and unit-cell indexing and is reported as an inherent characteristic, efforts to better understand, characterize, and even modify degrees of interpenetration have been recently reported.…”

Section: Review Articlementioning

confidence: 99%

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Scott

2018

Commun Chem

132

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Covalent organic frameworks, cross-linked crystalline polymers constructed from rigid organic precursors connected by covalent interactions, have emerged as a promising class of nanoporous materials owing to their highly desirable combination of attributes, including facile chemical tunability, structural diversity, and excellent stability. Despite the distinct advantages offered by three-dimensional covalent organic frameworks, research efforts have predominantly focused on the more synthetically-accessible, two-dimensional variants. Here we present an overview of synthetic approaches to yield three-dimensional covalent organic frameworks, identify synthetic obstacles that have hindered progress in the field and recently-employed methods to address them, and propose alternative techniques to circumvent these synthetic challenges. N anoporous materials have garnered tremendous interest in recent years owing to their specific and exceptional attributes, notably permanent porosity and large and accessible internal surface areas 1-5. Conventional nanoporous materials used commonly as adsorbents and heterogeneous catalysts and catalyst supports, such as zeolites and activated carbon, are based on inorganic building blocks; nevertheless, research interest in nanoporous materials bearing organic components has expanded rapidly 1,5,6. This is in part due to the exquisite structural and functional control such components provide and the flexibility they afford for designing materials specifically tailored towards the intended application 5. A large number of such nanoporous organic polymers have been fabricated in recent years, including polymers of intrinsic microporosity (PIMs) 5,6 , porous polymer networks (PPNs) 7 , and conjugated microporous polymers (CMPs) 8-10. These materials are uniformly amorphous and composed of multifunctional building blocks linked by covalent bonds, and many studies have demonstrated their synthesis and utility 7,11-13. Unfortunately, the amorphous nature of these materials can yield significant pore size dispersities, inhibiting their utilization in certain applications such as size-and shape-based gas separation and storage 2,11. Crystallinity, in contrast, is characterized by ordered structure and uniform porosity, ideal attributes for gas separation and storage, catalysis, and optoelectronic devices 2,14. Metal-organic frameworks (MOFs) are one such class of crystalline nanoporous materials that have been investigated extensively. MOFs are constructed from metal ions or clusters linked by organic

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Let’s Talk about MOFs—Topology and Terminology of Metal-Organic Frameworks and Why We Need Them

Cited by 78 publications

References 26 publications

Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Diamondoid Structure in a Metal–Organic Framework of Fe₄ Single‐Molecule Magnets

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

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Let’s Talk about MOFs—Topology and Terminology of Metal-Organic Frameworks and Why We Need Them

Cited by 78 publications

References 26 publications

Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Methylammonium Lead Trihalide Perovskite Solar Cell Semiconductors Are Not Organometallic: A Perspective

Diamondoid Structure in a Metal–Organic Framework of Fe4 Single‐Molecule Magnets

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

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Diamondoid Structure in a Metal–Organic Framework of Fe₄ Single‐Molecule Magnets