Two-dimensionally stacked heterometallic layers hosting a discrete chair dodecameric ring of water clusters: synthesis and structural study

Tsobnang, Patrice Kenfack; Wenger, Emmanuel; Biache, Coralie; Ngolui, John Lambi; Ponou, Siméon; Dahaoui, Slimane; Lecomte, Claude

doi:10.1107/s2052520614019921

Cited by 4 publications

(7 citation statements)

References 30 publications

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“…During the gate opening process, the capillary condensation occurs with the construction of the docecameric water clusters for I and the hexameric ones for II and III as observed in the structure of these compounds. The hydrogen bonds within these clusters are stronger than those between the clusters and the cluster and the host as can be deduced from the hydrogen-bond distances given in Table S14 and Table S3 for II and III respectively, and as we have reported earlier for I . All this could explain the type V profile observed at the second step of the water vapor adsorption of the three materials.…”

Section: Resultsmentioning

confidence: 97%

“…The crystals of catena-{[Co(amp) 3 ][Cr(ox) 3 ]• 6H 2 O}(amp = 2-aminomethylpyridine, ox = oxalate) (designated as I) are brown as expected. 38 This was an indicator that the compound has been well obtained. For compounds…”

Section: Comment On the Synthesis Of The Threementioning

confidence: 94%

“…{[Co(amp) 3 ][Cr(ox) 3 ]•6H 2 O} n (I) (amp = 2-aminomethylpyridine, ox = oxalate) was synthesized as reported earlier. 38 For compounds {[Cu 2 (amp)…”

Section: Methodsmentioning

confidence: 99%

“…{[Co(amp) 3 ][Cr(ox) 3 ]·6H 2 O} n ( I ) (amp = 2-aminomethylpyridine, ox = oxalate) was synthesized as reported earlier . For compounds {[Cu 2 (amp) 4 Cl][Cr(C 2 O 4 ) 3 ]·6H 2 O} n ( II ) and {[Cu 2 (amp) 4 Cl][Fe(C 2 O 4 ) 3 ]·6H 2 O} n ( III ) stoichiometric amounts of K 3 Cr(C 2 O 4 ) 3 ·3H 2 O (0.60 g, 1.23 mmol) or (NH 4 ) 3 Fe(C 2 O 4 ) 3 ·3H 2 O (0.53 g, 1.23 mmol) were dissolved in 10 mL of water at 60 °C, and a mixture of 2-aminomethylpyridine (0.25 mL, 2.47 mmol) and CuCl 2 ·2H 2 O (0.21 g, 1.24 mmol) in 10 mL of water at 60 °C was added 15 min later.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…The pores are thus more cylindrical, but the free volume of the architecture, if the water molecules are omitted, is less than that is found for I (677 Å 3 vs 734 Å 3 ). This could be related to the fact that the 12 water molecules located in each channel section of the unit cell build a dodecameric water cluster 38 in I while they form two hexameric clusters in II.…”

Section: Comment On the Synthesis Of The Threementioning

confidence: 99%

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Water Vapor Single-Gas Selectivity via Flexibility of Three Potential Materials for Autonomous Indoor Humidity Control

Tsobnang

Hastürk

Fröhlich

et al. 2019

Crystal Growth & Design

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Two new isostructural porous supramolecular materials {[Cu 2 (amp) 4 Cl][M(C 2 O 4 ) 3 ]•6H 2 O} n (amp = 2-aminomethylpyridine), designated as II and III for M = Cr(III) and M = Fe(III) respectively, have been synthesized by a self-assembly process of two ionic complexes [Cu 2 (amp) 4 Cl] 3+ and [M(C 2 O 4 ) 3 ] 3− , M = Fe(III) and Cr(III). They build heterometallic hydrogenbonded-, oxalato-and chlorido-bridged zigzag chains with interchain hydrogen bonds and π−π interactions. This results in supramolecular potentially porous architectures exhibiting large channels filled with hexameric water clusters. Their activated phases, II′ and III′, can readsorb the water molecules to regenerate the initial materials which are stable for many water adsorption and desorption cycles like that of their homologous catena-{ [(Co(amp) 3 ][Cr(C 2 O 4 ) 3 ]•6H 2 O} (I′). The three materials I′, II′, and III′ exhibit water adsorption and desorption isotherms having a sigmoidal shape and resulting in the combination of a type I(b) profile followed by an S-shaped type V isotherm with hysteresis. At 20 °C, the steep water sorption of the S-shaped isotherm occurs at 0.1P/P 0 for II′ and III′. This water sorption behavior is quite different from the related compound I′, where a gate opening and closure process is involved, giving a type V isotherm with a pronounced H1-type hysteresis loop with parallel and steep adsorption (at 0.25P/P 0 ) and desorption branches (at 0.17P/P 0 ). The water adsorption capacities of the three materials I′, II′, and III′ are 17, 12, and 11 wt %, respectively. Temperature does not have a great effect on their water sorption properties, and they all exclude N 2 and CO 2 gases in the low pressure range. Compounds II′ and III′ are classified among the materials for which the dehumidification and the humidification trigger points are the same or too close (10% relative humidity (r.H.) in their case), while I′ shows a good potential to be used for automatic indoor control in the range of 15−25% r.H. recommended for many activities. All the differences observed in the water sorption properties of the three materials are related to (i) the type of water cluster which is built in each material, (ii) the strength of the hydrogen bonds within each water cluster and between the clusters and its host, and (iii) the strength of the intrahost interactions which keep the pores of the material closed.

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Section: Resultsmentioning

confidence: 97%

Section: Comment On the Synthesis Of The Threementioning

confidence: 94%

“…{[Co(amp) 3 ][Cr(ox) 3 ]•6H 2 O} n (I) (amp = 2-aminomethylpyridine, ox = oxalate) was synthesized as reported earlier. 38 For compounds {[Cu 2 (amp)…”

Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Comment On the Synthesis Of The Threementioning

confidence: 99%

See 3 more Smart Citations

Water Vapor Single-Gas Selectivity via Flexibility of Three Potential Materials for Autonomous Indoor Humidity Control

Tsobnang

Hastürk

Fröhlich

et al. 2019

Crystal Growth & Design

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Chromium(III) Complexes

Staples

Reinholdt

Mindiola

2021

Comprehensive Coordination Chemistry III

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Reversible Breathing Process and Associated Thermochromism of a Stacked-Layer Porous Supramolecular Material

Tsobnang

Ngolui

Wenger

et al. 2017

Crystal Growth & Design

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The two-dimensional (2-D) catena-{Co(amp)3Cr(ox)3·6H2O}(amp = 2-picolylamine, ox = oxalate) compound is built by the [Co(amp)3]3+ (D) and [Cr(ox)3]3– (A) ions via multiple hydrogen bonds and hosts well-resolved R12 dodecameric discrete water cluster rings between its stacked layers. It undergoes reversible single crystal to single crystal transformation upon dehydration and rehydration in air, both processes being correlated to gradual changes from brown (hydrated phase) to green (dehydrated phase) and vice versa. The water uptake mass of this compound is 0.13 g/g of sample, and the rehydration process needs 90 min. The rate limiting step of the rehydration process is the diffusion of the water molecules into the framework of the dehydrated phase because the latter does not have voids. The 2-D catena-{Co(amp)3Cr(ox)3·6H2O} can undergo many cycles of dehydration/rehydration (breathing) processes without losing its crystallinity. During these processes, its unit cell contracts and expands by 9.39% along the a axis, 12.22% along b, and 2.03% along c for a total volume change of 22.03%. The breakage and formation of some hydrogen bonds in the compound take place alongside the processes, especially along the b axis, which is the main direction of modification of the unit cell. One of these hydrogen bonds is responsible for the modification of the coordination polyhedron around the chromium(III) ions which becomes less distorted and provokes the gradual thermochromic property observed in this compound.

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Two-dimensionally stacked heterometallic layers hosting a discrete chair dodecameric ring of water clusters: synthesis and structural study

Cited by 4 publications

References 30 publications

Water Vapor Single-Gas Selectivity via Flexibility of Three Potential Materials for Autonomous Indoor Humidity Control

Water Vapor Single-Gas Selectivity via Flexibility of Three Potential Materials for Autonomous Indoor Humidity Control

Chromium(III) Complexes

Reversible Breathing Process and Associated Thermochromism of a Stacked-Layer Porous Supramolecular Material

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