Selective binding and removal of organic molecules in a flexible polymeric material with stretchable metallosalen chains

Gao, Li; Zhu, Chengfeng; Xi, Xiaobing; Cui, Yong

doi:10.1039/b901574d

Cited by 50 publications

(30 citation statements)

References 17 publications

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“…In contrast, relatively hydrophilic ethyl acetate and 2‐furaldehyde were least absorbed. This is because inherently hydrophobic LDPE having high affinity for organic molecules with similar properties subsequent increases sorption within the polymer matrix . In other words, hydrophilic EVOH would have to be low affinities for hydrophobic molecules, hence decreasing tendency of scalping to change the flavour profile of food product …”

Section: Resultsmentioning

confidence: 99%

Development and evaluation of organic vapour permeation system for packaging applications

et al. 2019

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This paper reported the permeability of four different organic compounds in low‐density polyethylene (LDPE), ethylene vinyl alcohol (EVOH), and in a multilayer film composed of them through the isostatic flow permeation measurement system. The methodology assumed that the nitrogen feed stream is saturated with organic vapour, and a chromatographic technique was used as a detector for the quantification of the permeate. The results were in general good agreement with literature reports, providing accuracy and reliability of measurement procedures. The permeability of LDPE increased with increasing hydrophobicity of organic compounds, but hydrophilic EVOH suggesting that there had been an effect of functional groups on permeability behaviour. The multilayer films were observed larger than expected because of the interface responsible for adhesive bonding of tie resins to EVOH by chemical interactions. Nonetheless, as an application of such multilayer structures, we suggested the method studied as feasible and possible tools for characterizing permeation properties against organic vapours.

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Section: Resultsmentioning

confidence: 99%

Development and evaluation of organic vapour permeation system for packaging applications

et al. 2019

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“…Above mentioned works showed the two sides of a coin. Obviously, not only rigid structure [51,60,61] can be constructed from chains motif, 1D PCPs can also display very interesting dynamic structure change [59,62]. This is contribute to update the long-term perception that 1D PCPs are less interesting compared to high dimension systems.…”

Section: Introductionmentioning

confidence: 95%

“…[ZnL]·C 6 H 6 (4a·benzene, H 2 L = (R,R)-(-)-N,N′-bis(3-tertbutyl-5-(4-ethynylpyridyl)salicylidene)-1,2-diamino cyclohexane) constructed from zigzag 1D chains (Figure 2(a)) and it's SC-SC structural transformations triggered by heating and solvent sorption was reported [59]. The compound possesses a void space of 21.4% and can be accessed from 1D open channels of 3.49 × 3.77 Å 2 .…”

Section: Introductionmentioning

confidence: 97%

Recent advance in porous coordination polymers from the viewpoint of crystalline-state transformation

Yin

Zeng

2011

Sci. China Chem.

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Recently, research of crystalline-state transformation involving the removal/inclusion of guest molecules in porous coordination polymers (PCPs) was underway. Crystalline-state transformation, especially, single-crystal to single-crystal (SC-SC) transformation as new method for the direct observation of host-guest chemistry, can reveal the intrinsic relevance and interaction between the framework and guest molecules. This review describes our work concerning PCPs and recent investigations of others, within the last four years, from the viewpoint of crystalline-state transformations of PCPs on guest removal or inclusion processes. Ligand substitution reaction and postsynthetic modification of PCPs in SC-SC fashion which were distinguished from conventional crystalline-state transformation triggered by guest removal or exchange were highlighted in this review. The research status of crystalline-state transformation in China was briefly introduced as well. Series of structure analysis techniques including single-crystal X-ray diffraction, powder X-ray diffraction, neutron diffraction, inelastic neutron scattering as well as the application of synchrotron radiation light source will inevitably promote the advance of study of crystalline-state transformation. And as a hotspot, deep investigations of crystalline-state transformation also help us to overcome the challenge of achieving multifunction and the correlation among them, such as sorption, magnetism, optical or electrical properties simultaneously in PCPs and contribute to design stimulate-oriented porous intelligent materials in the future.

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“…In complex 1·Mn'OH À , besides the intrinsic hydrophilic character of the pore space, abundant phenyl groups in the host framework may bring about p À p stacking or C À H···p interactions with the flat benzene molecule, which may provide the driving force for benzene adsorption. [16] …”

mentioning

confidence: 97%

Borromean‐Entanglement‐Driven Assembly of Porous Molecular Architectures with Anion‐Modified Pore Space

Sun

Yao

Lei

et al. 2012

Chemistry A European J

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A series of metal-organic frameworks based on a flexible, highly charged Bpybc ligand, namely 1⋅Mn⊃OH(-), 2⋅Mn⊃SO(4)(2-), 3⋅Mn⊃bdc(2-), 4⋅Eu⊃SO(4)(2-) (H(2)BpybcCl(2) = 1,1'-bis(4-carboxybenzyl)-4,4'-bipyridinium dichloride, H(2)bdc = 1,4-benzenedicarboxylic acid) have been obtained by a self-assembly process. Single-crystal X-ray-diffraction analysis revealed that all of these compounds contained the same n-fold 2D→3D Borromean-entangled topology with irregular butterfly-like pore channels that were parallel to the Borromean sheets. These structures were highly tolerant towards various metal ions (from divalent transition metals to trivalent lanthanide ions) and anion species (from small inorganic anions to bulky organic anions), which demonstrated the superstability of these Borromean linkages. This non-interpenetrated entanglement represents a new way of increasing the stability of the porous frameworks. The introduction of bipyridinium molecules into the porous frameworks led to the formation of cationic surface, which showed high affinities to methanol and water vapor. The distinct adsorption and desorption isotherms of methanol vapor in four complexes revealed that the accommodated anion species (of different size, shape, and location) provided a unique platform to tune the environment of the pore space. Measurements of the adsorption of various organic vapors onto framework 1⋅Mn⊃OH(-) further revealed that these pores have a high adsorption selectivity towards molecules with different sizes, polarities, or π-conjugated structures.

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Selective binding and removal of organic molecules in a flexible polymeric material with stretchable metallosalen chains

Abstract: A dynamic porous coordination network with a hydrophobic channel was assembled from stretchable 1D metallosalen polymer, which has the ability to recognize and, particularly, separate aromatic hydrocarbons from aliphatic mixtures with high selectivity.

Cited by 50 publications

References 17 publications

Development and evaluation of organic vapour permeation system for packaging applications

Development and evaluation of organic vapour permeation system for packaging applications

Recent advance in porous coordination polymers from the viewpoint of crystalline-state transformation

Borromean‐Entanglement‐Driven Assembly of Porous Molecular Architectures with Anion‐Modified Pore Space

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