Humidity-Induced Structural Transformation in Pseudopolymorph Coordination Polymers

Notash, Behrouz; Rodbari, Mona Farhadi; Gallo, Gianpiero; Dinnebiér, Robert E.

doi:10.1021/acs.inorgchem.1c01360

Cited by 15 publications

(37 citation statements)

References 78 publications

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“…(powder) have been reported recently by our research group 28 and Fonari et al (1). X-ray crystallography for the needle-shaped single crystals of compound 1 shows that it crystallizes in the triclinic crystal system and P1̅ space group.…”

Section: Synthesis Of Compounds 1−3 Several 1d Cadmiummentioning

confidence: 55%

Water Content-Controlled Formation and Transformation of Concomitant Pseudopolymorph Coordination Polymers

2023

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Two concomitant pseudopolymorph coordination polymers {[Cd2L2(OAc)4]·2DMSO} n (1) and {[CdL(OAc)2]·2.75H2O} n (2) were synthesized by self-assembly of 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene (L) and cadmium acetate in DMSO. Single-crystal X-ray diffraction confirmed that 1D ladder structural motifs exist for pseudopolymorphs 1 and 2 which contain DMSO and water guest molecules, respectively. Our study illustrated the active role of solvent water content in obtaining compound 2. We find that the presence of water as an impurity in the DMSO solvent creates the possibility of formation of concomitant pseudopolymorph coordination polymers which is a unique event. Furthermore, our analyses showed the effect of environmental humidity on the transformation of unstable compound 1. 1D ladder pseudopolymorphic compound 1 could be transformed to guest-free 1D linear compound [CdL(OAc)2(H2O)] n (3′) (the powder form of single crystals of 3) through a scarce case of water absorption from air. Also, the crystalline material of coordination polymer 3 was transformed to coordination polymer 2 through the dissolution–recrystallization structural transformation process in DMF or DMSO. Our study clarified that the amount of water in the reaction container can control the formation of one of the compounds 2 or 3. In the presence of a significant amount of water, compound 3 (coordinated water) will be produced, whereas if a small amount of water is present, compound 2 (uncoordinated water) is prepared as an exclusive product.

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Section: Synthesis Of Compounds 1−3 Several 1d Cadmiummentioning

confidence: 55%

Water Content-Controlled Formation and Transformation of Concomitant Pseudopolymorph Coordination Polymers

2023

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“…Transformations of coordination polymers are commonly divided into two types: namely, solid-state structural transformation (SSST) [11][12][13] and dissolution-recrystallization structural transformation (DRST). 30 Single-crystal-to-singlecrystal (SCSC) [11][12][13]15 transformations are one kind of common transformation in SSST, for sustaining macroscopic integrity during reactions. Complex 1, containing weakly bound methanol molecules at lattice positions, undergoes selective solvent (methanol) induced structural transformation to shrink a single crystal of complex 1a at room temperature (25 °C) by molecular rearrangement in the solid state.…”

Section: Discussion For Reversible Structural Transformationmentioning

confidence: 99%

“…In this context, dynamic or soft porous networks of MOFs have generated interest for the development of new materials for selective gas sorption and separation. 10 For dynamic porous network SCSC, 15 transformation generally occurs through external stimuli, like temperature, light and exchange of ions or solvent. 16,18 The exchange or elimination of guest solvent molecules [19][20][21][22][23] may transform the structure due to various factors like the breathing effect, 24 sliding between layers, 25 variation of the packing mode, change in the spatial group and symmetry or redistribution of the pores in the network.…”

Section: Introductionmentioning

confidence: 99%

Solvent induced reversible single-crystal-to-single-crystal structural transformation in dynamic metal organic frameworks: a case of enhanced hydrogen sorption in polycatenated framework

et al. 2023

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“…The coordination, supramolecular interactions, and/or polarity of the solvent molecules usually lead to DRSTs. − These differences generally result in changes in the coordination number, geometry, or dimensionality of the resulting CPs. Nonetheless, structural transformations of the SBUs are relatively scarce, ,− and to the best of our knowledge, no examples of CPs presenting multiple alterations of its initial SBU by DRSTs can be found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Amide-Driven Secondary Building Unit Structural Transformations between Zn(II) Coordination Polymers

Ejarque

Calvet

Font-Bardı́a

et al. 2022

Crystal Growth & Design

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The behavior of coordination polymers (CPs) against external stimuli has witnessed remarkable attention, especially when the resulting CPs present reversible molecular arrays. Accordingly, CPs with these characteristics can lead to differences in their properties owing to these structural differences, being promising for their use as potential molecular switches with diverse applications. Herein, we have synthesized four Zn(II) CPs bearing α-acetamidocinnamic acid (HACA) and 4,4′-bipyridine (4,4′-bipy). The reaction between Zn(OAc) 2 •2H 2 O, HACA, and 4,4′-bipy yields {[Zn(ACA) 2 (4,4′-bipy)]•EtOH} n (1), which was used for the formation of three CPs through dissolution− recrystallization structural transformations (DRSTs, and {[Zn 3 (μ-ACA) 6 (4,4′-bipy)]• 0.75CHCl 3 } n (4). The study of the four crystal structures revealed that their secondary building units (SBUs) comprise monomeric, dimeric, and trimeric arrangements linked by 4,4′-bipy ligands. The fundamental role of the utilized solvent and/or temperature, as well as their effect on the orientation of the amide moieties driving the formation of the different SBUs is discussed. Furthermore, the reversibility and interconversion between the four CPs have been assayed. Finally, their solid-state photoluminescence has evinced that the effect of the amide moieties not only predetermine a different SBU but also lead to a different emission in 4 compared with 1−3.

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Humidity-Induced Structural Transformation in Pseudopolymorph Coordination Polymers

Cited by 15 publications

References 78 publications

Water Content-Controlled Formation and Transformation of Concomitant Pseudopolymorph Coordination Polymers

Water Content-Controlled Formation and Transformation of Concomitant Pseudopolymorph Coordination Polymers

Solvent induced reversible single-crystal-to-single-crystal structural transformation in dynamic metal organic frameworks: a case of enhanced hydrogen sorption in polycatenated framework

Amide-Driven Secondary Building Unit Structural Transformations between Zn(II) Coordination Polymers

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