Reversible flexible structural changes in multidimensional MOFs by guest molecules (I2, NH3) and thermal stimulation

Chen, Yang; Li, Libo; Wang, Shuang; Li, Jinping

doi:10.1016/j.jssc.2015.02.014

Cited by 9 publications

(11 citation statements)

References 35 publications

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“…For some of the compounds such as [Cu(Tba) 2 ](ClO 4 ) 2 (18), [Cu(4-Aba) 2 (EtOH) 2 ](BF 4 ) 2 ( 16), [Cu(Pya) 2 ](BF 4 ) 2 (9), and [Cu(2-Aba) 2 (NO 3 ) 2 ] (13), the optimum Cu:ligand ratio was the same as the stoichiometry of the compound. Remarkably, this is also true for [Cu(Pyc)(Tfa)] ( 12) which was produced from a 1:1 mixture of Cu(Tfa) 2 •H 2 O and pyrazine-amide (Pya).…”

Section: Synthesis Of the Cu Complexesmentioning

confidence: 99%

“…On the other hand, the data did not unequivocally allow determining whether these anions are ligands or counter ions. For example, in [Cu(Ina) 4 (H 2 O) 2 ](BF 4 ) 2 (1) the ν(B-F) vibration is found as a strong band at 1080 cm −1 , but as very strong broad resonance at 1050 cm −1 for [Cu(Pya) 2 ](BF 4 ) 2 (9). Both structures contain BF 4 − as counter anion.…”

Section: Synthesis Of the Cu Complexesmentioning

confidence: 99%

“…Rhombic spectra were recorded for [Cu(Pya) 2 ](BF 4 ) 2 (9), [Cu(4-Aba) 2 (EtOH) 2 ](ClO 4 ) 2 (15) and [Cu(4-Aba) 2 (EtOH) 2 ](BF 4 ) 2 ( 16) (group IV) when measured at 110 K (group II). Remarkably, the spectra of the two latter compounds are axial at 298 K and for [Cu(4-Aba) 2 (EtOH) 2 ](ClO 4 ) 2 (15) a gradual transition between the rhombic and axial spectrum was observed between 110 and 298 K (Figure 6).…”

Section: X-band Epr Spectroscopy and Magnetic Measurementsmentioning

confidence: 99%

“…Pyridine carboxamides, pyrazine carboxamides and amino-benzamides (Scheme 1) are interesting ditopic ligands for Cu II coordination chemistry . One reason is their use as versatile building blocks in coordination polymers and MOFs for various applications [1][2][3]8,9,[11][12][13]16,20,21,26,27]. Another important reason is the biological relevance of some of the ligands used in this study (Scheme 1) [4][5][6]17,18,24,33].…”

Section: Introductionmentioning

confidence: 99%

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CuII Complexes and Coordination Polymers with Pyridine or Pyrazine Amides and Amino Benzamides—Structures and EPR Patterns

et al. 2020

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Isonicotine amide, picoline amide, pyrazine 2-amide, 2- and 4-amino benzamides and various CuII salts were used to target CuII complexes of these ligands alongside with 1D and 2D coordination polymers. Under the criterion of obtaining crystalline and single phased materials a number of new compounds were reliably reproduced. Remarkably, for some of these compounds the ideal Cu:ligand ratio of the starting materials turned out to be very different from Cu:ligand ratio in the products. Crystal and molecular structures from single-crystal XRD were obtained for all new compounds; phase purity was checked using powder XRD. We observed exclusively the Oamide and not the NH2amide function binding to CuII. In most of the cases; this occurred in chelates with the second pyridine, pyrazine or aminophenyl N function. µ-O,N ditopic bridging was frequently observed for the N = pyridine, pyrazine or aminophenyl functions, but not exclusively. The geometry around CuII in these compounds was very often axially elongated octahedral or square pyramidal. X-band EPR spectra of powder samples revealed various spectral symmetry patterns ranging from axial over rhombic to inverse axial. Although the EPR spectra cannot be unequivocally correlated to the observed geometry of CuII in the solid state structures, the EPR patterns can help to support assumed structures as shown for the compound [Cu(Ina)2Br2] (Ina = isonicotine amide). As UV-vis absorption spectroscopy and magnetic measurement in the solid can also be roughly correlated to the surrounding of CuII, we suggest the combination of EPR, UV-vis spectroscopy and magnetic measurements to elucidate possible structures of CuII compounds with such ligands.

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Section: Synthesis Of the Cu Complexesmentioning

confidence: 99%

Section: Synthesis Of the Cu Complexesmentioning

confidence: 99%

Section: X-band Epr Spectroscopy and Magnetic Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CuII Complexes and Coordination Polymers with Pyridine or Pyrazine Amides and Amino Benzamides—Structures and EPR Patterns

et al. 2020

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“…For example, it was possible to carry out functionalization of the organic part and/or modification of the metal center in order to tune interactions occurring between the adsorbate and the solid surface, thereby modelling the adsorption power of the adsorbent [ 26 , 27 , 28 , 29 , 30 , 31 , 32 ] and its flexibility capacity [ 33 , 34 ]. Furthermore, the usefulness of these porous solids for nuclear applications has been already publicized, since some MOF materials are considered for the adsorption of a radioactive gas [ 35 , 36 , 37 , 38 , 39 , 40 ] or ion sequestration [ 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Salles

Zając

2021

Nanomaterials

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A computational approach is used on MOF materials to predict the structures showing the best performances for I2 adsorption as a function of the functionalization, the pore size, the presence of the compensating ions, and the flexibility on which to base future improvements in selected materials in view of their targeted application. Such an approach can be generalized for the adsorption of other gases or vapors. Following the results from the simulations, it was evidenced that the maximum capacity of I2 adsorption by MOF solids with longer organic moieties and larger pores could exceed that of previously tested materials. In particular, the best retention performance was evidenced for MIL-100-BTB. However, if the capacity to retain traces of gaseous I2 on the surface is considered, MIL-101-2CH3, MIL-101-2CF3, and UiO-66-2CH3 appear more promising. Furthermore, the impact of temperature is also investigated.

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Vapor phase solvents loaded in zeolite as the sustainable medium for the preparation of Cu-BTC and ZIF-8

Yang

Wang

et al. 2017

Chemical Engineering Journal

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Reversible flexible structural changes in multidimensional MOFs by guest molecules (I2, NH3) and thermal stimulation

Cited by 9 publications

References 35 publications

CuII Complexes and Coordination Polymers with Pyridine or Pyrazine Amides and Amino Benzamides—Structures and EPR Patterns

CuII Complexes and Coordination Polymers with Pyridine or Pyrazine Amides and Amino Benzamides—Structures and EPR Patterns

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Vapor phase solvents loaded in zeolite as the sustainable medium for the preparation of Cu-BTC and ZIF-8

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