Polarized IR and Raman spectra of the novel metal-organic framework [CH3CH2NH3][Cd(HCOO)3]

Ciupa, Aneta; Ptak, Maciej

doi:10.1016/j.vibspec.2016.06.003

Cited by 16 publications

(14 citation statements)

References 38 publications

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“…However, we would like to highlight the importance of metal cation size on vibrational properties of HCOO − ions. For example, the comparison of previous Raman results for EtACd and EtAMn with present ones for EtAMg shows that the υ 1 (C─H stretching) modes' wavenumbers of EtAMg, EtAMn and EtACd change in the order 2875–2869 cm −1 < 2860–2850 cm −1 < 2853–2848 cm −1 , respectively. Similar behavior is also observed for the υ 6 (C─H out‐of‐plane bending) modes that shift from 1065 to 1059 cm −1 for EtACd to 1068–1059 cm −1 for EtAMn and 1075–1062 cm −1 for EtAMg.…”

Section: Resultsmentioning

confidence: 59%

“…The assignment of lattice modes is more difficult because these modes are strongly coupled. Our former room‐temperature studies of EtACd and EtAMn allowed us to attribute the 71–199 cm −1 bands to translations of M II ions and those above 200 cm −1 to translational motions of formate ions . This proposed and tentative assignment requires verification because measurements performed for the magnesium analogue in the far IR region provide some important information (Fig.…”

Section: Resultsmentioning

confidence: 90%

“…We propose the assignment of bands corresponding to internal vibrations of the HCOO − and EtA + ions based mainly on the data available for the related formates with NH 4 + ([NH 4 ][Mg(HCOO) 3 ]), DMA + ([(CH 3 ) 2 NH 2 ][Mg(HCOO) 3 ]) and EtA + cations, ([CH 3 CH 2 NH 3 ][Na 0.5 M III 0.5 (HCOO) 3 ] (M III = Al, Cr, Fe), [CH 3 CH 2 NH 3 ] 2 [Fe II Fe III (HCOO) 6 ], and [CH 3 CH 2 NH 3 ][Cd(HCOO) 3 ]) . Because the room temperature phonon properties of EtACd and EtAMn have been reported recently by us, the detailed description will be avoided here. However, we would like to highlight the importance of metal cation size on vibrational properties of HCOO − ions.…”

Section: Resultsmentioning

confidence: 99%

“…One of interesting sub‐group of dense MOFs are those containing ethylammonium cations (CH 3 CH 2 NH 3 + , EtA + ) as templates. Up to now, only four metal formates with EtA + cations and divalent Mn (EtAMn), Cu (EtACu), Mg (EtAMg) and Cd (EtACd) ions were reported . They are isostructural and crystallize at room temperature in the non‐centrosymmetric Pna 2 1 space group with ordered EtA + cations.…”

Section: Introductionmentioning

confidence: 99%

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Vibrational investigation of pressure‐ and temperature‐induced phase transitions in metal formates templated by ethylammonium ions

Ciupa

Ptak

Mączka

et al. 2017

J Raman Spectroscopy

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We report for the first time phonon properties of [CH3CH2NH3][Mg(HCOO)3] (EtAMg). The studied compound undergoes two structural temperature‐induced phase transitions and temperature‐dependent Raman and infrared studies let us to obtain insight into mechanism of these transitions. In particular, very large broadening of infrared and Raman bands, attributed to vibrations of the NH3 groups, revealed highly dynamic nature of these groups in the both high‐temperature phases. This result indicates that the phase transitions at 374 and 426 K are associated with disordering of the template cations. Raman and infrared data also show that both phase transitions are accompanied by significant distortion of the anionic framework. We also present the pressure‐dependent Raman data of EtAMn framework up to 7.1 GPa. These data revealed presence of two pressure‐induced phase transitions, one between 3.7 and 4.0 GPa and second between 5.6 and 6.0 GPa. We discuss mechanisms of these transitions. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vibrational investigation of pressure‐ and temperature‐induced phase transitions in metal formates templated by ethylammonium ions

Ciupa

Ptak

Mączka

et al. 2017

J Raman Spectroscopy

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show abstract

“…So far, vibrational spectroscopy was mainly employed to monitor macroscopic properties of MOFs/COFs such as structure and stability under varied conditions. The vibrational fingerprints from the materials' organic building can be used to probe structural alterations (Ciupa and Ptak , Szymborska‐Małek et al ) or phase transitions (Mączka et al , Kumari et al ). Moreover, FTIR and Raman spectroscopy have been used for studying interactions/inclusions of small molecules such as hydrogen, water as well as CO 2 within MOFs (Nijem et al ,b).…”

Section: Vibrational Spectroscopy For Studying Reaction Mechanisms Wimentioning

confidence: 99%

Artificial photosynthesis with metal and covalent organic frameworks (MOFs and COFs): challenges and prospects in fuel‐forming electrocatalysis

Heidary

Harris

et al. 2019

Physiologia Plantarum

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Mimicking photosynthesis in generating chemical fuels from sunlight is a promising strategy to alleviate society's demand for fossil fuels. However, this approach involves a number of challenges that must be overcome before this concept can emerge as a viable solution to society's energy demand. Particularly in artificial photosynthesis, the catalytic chemistry that converts energy in the form of electricity into carbon‐based fuels and chemicals has yet to be developed. Here, we describe the foundational work and future prospects of an emerging and promising class of materials: metal‐ and covalent‐organic frameworks (MOFs and COFs). Within this context, these porous and tuneable framework materials have achieved initial success in converting abundant feedstocks (H2O and CO2) into chemicals and fuels. In this review, we first highlight key achievements in this direction. We then follow with a perspective on precisely how MOFs and COFs can perform in ways not possible with conventional molecular or heterogeneous catalysts. We conclude with a view on how spectroscopically probing MOF and COF catalysis can be used to elucidate reaction mechanisms and material dynamics throughout the course of reaction.

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Conquering Metal–Organic Frameworks by Raman Scattering Techniques

Tittel,

Knechtel,

Ploetz

2023

Adv Funct Materials

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Metal–organic frameworks (MOFs) have emerged as a versatile class of materials. Understanding the structural and chemical properties of MOFs is essential for tailoring their performance to suit specific applications. In recent years, Raman spectroscopy, a non‐destructive vibrational spectroscopic technique, has evolved into a powerful tool for characterizing MOFs. Beyond spontaneous Raman scattering, numerous advanced Raman techniques have been developed to amplify the inherently weak Raman signal. These innovations have significantly enhanced the spatial resolution, frame rate, and sensitivity of Raman imaging, thereby opening up new possibilities for applications, such as label‐free sensing. This tutorial work is designed to demystify the fundamental theory and instrumentation of Raman spectroscopy, elucidating the differences between commonly used Raman techniques. Particular emphasis is placed on their advantages and limitations when applied to MOF materials. Furthermore, this work showcases how Raman techniques are employed in studying MOF systems to address societal needs and explore future directions. Ultimately, this review emphasizes the crucial role of Raman spectroscopy and the development of novel Raman‐based in situ techniques to conquer the field of MOFs.

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Polarized IR and Raman spectra of the novel metal-organic framework [CH3CH2NH3][Cd(HCOO)3]

Cited by 16 publications

References 38 publications

Vibrational investigation of pressure‐ and temperature‐induced phase transitions in metal formates templated by ethylammonium ions

Vibrational investigation of pressure‐ and temperature‐induced phase transitions in metal formates templated by ethylammonium ions

Artificial photosynthesis with metal and covalent organic frameworks (MOFs and COFs): challenges and prospects in fuel‐forming electrocatalysis

Conquering Metal–Organic Frameworks by Raman Scattering Techniques

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