Imidazolium-based ionic porous hybrid polymers with POSS-derived silanols for efficient heterogeneous catalytic CO2 conversion under mild conditions

Chen, Guojian; Zhang, Yadong; Xu, Jingyu; Liu, Xiaoqing; Liu, Ke; Tong, Minman; Long, Zhouyang

doi:10.1016/j.cej.2019.122765

Cited by 134 publications

(63 citation statements)

References 62 publications

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“…[14] The high-resolution C 1s spectra can be also deconvoluted into two peaks assigning to C-C (286.1 and 286.8 eV) and C-N (284.6 and 284.5 eV) carbon species ( Figure S8, Supporting Information). [15] Moreover, no obvious signals for Br 2p can be observed in the high-resolution spectra which is consistent with energy-dispersive X-ray spectroscopy (EDS) elemental mapping data ( Figure S9, Supporting Information), implying the replacement of Brwith Cl -. Elemental analyses results show that the experimental values for C and N are lower than the theoretical values (Table S1, Supporting Information) because of the adsorbed water molecules in the frameworks.…”

Section: Doi: 101002/advs202001899supporting

confidence: 80%

Porous Aromatic Framework with Tailored Binding Sites and Pore Sizes as a High‐Performance Hemoperfusion Adsorbent for Bilirubin Removal

Zhao

Cui

et al. 2020

Advanced Science

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Highly efficient removal of bilirubin from blood by hemoperfusion for liver failure therapy remains a challenge in the clinical field due to the low adsorption capacity and slow adsorption kinetics of currently used bilirubin adsorbents (e.g., activated carbon and ion-exchange resin). Recently, porous aromatic frameworks (PAFs) with high surface areas, tunable structures, and remarkable stability provide numerous possibilities to obtain satisfying adsorbents. Here, a cationic PAF with more mesopores, named iPAF-6, is successfully constructed via a de novo synthetic strategy for bilirubin removal. The prepared iPAF-6 exhibits a record-high adsorption capacity of 1249 mg g −1 and can adsorb bilirubin from 150 mg L −1 to normal concentration in just 5 min. Moreover, iPAF-6 shows a removal efficiency of 96% toward bilirubin in the presence of 50 g L −1 bovine serum albumin. It is demonstrated that positively charged aromatic frameworks and large pore size make a significant contribution to its excellent adsorption ability. More notably, iPAF-6/polyethersulfone composite fibers or beads are fabricated for practical hemoperfusion adsorption, which also show better removal performance than commercial adsorbents. This work can offer a new possibility for designing PAF-based bilirubin adsorbents with an appealing application prospect. Bilirubin is the major product of hemoglobin metabolism and is transported by albumin to liver for excretion. [1] The normal total bilirubin level in serum is 0.1−1.0 mg dL −1. [2] However, people with liver failure cannot eliminate bilirubin timely, leading to the excess accumulation of bilirubin in blood, called hyperbilirubinemia. [3] The extra bilirubin can cause yellow discoloration of skin and also bring about series of injuries to tissues and organs, and even result in death. [4] Therefore,

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Section: Doi: 101002/advs202001899supporting

confidence: 80%

Porous Aromatic Framework with Tailored Binding Sites and Pore Sizes as a High‐Performance Hemoperfusion Adsorbent for Bilirubin Removal

Zhao

Cui

et al. 2020

Advanced Science

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“…Moreover, the nucleophilic attack of bromide anion on epoxide is essential. Previous reports suggested that the ring-opening step of epoxide is rate-determining [34,53,54], and a nucleophilic attack of an anion on the carbon atom of epoxide with a synergetic electrophilic attack of a cation on the oxygen atom of epoxide can facilitate this step significantly [20,26,27,[33][34][35][36][37][38]. Moreover, it was also well demonstrated that the hydrogen bond between the hydroxyl group and epoxide has a good promoting effect for the ring-opening step, thus accelerating this cycloaddition reaction [34][35][36][37][38]40,46,52,53].…”

Section: Plausible Reaction Mechanismmentioning

confidence: 95%

“…In terms of their similar surface areas and ionic concentrations, the differences in catalytic activities should be attributed to the promoting effect of HBD groups (hydroxyl groups). PQPBr-2OH, having both Br anions and hydroxyl groups, could cooperatively activate the epoxide, thus improving catalytic performances significantly [20,26,27,[33][34][35][36][37][38]. Moreover, the concentrations of the hydroxyl groups also affected the catalytic performance, and the PQPBr-2OH catalyst with dual hydroxyls exhibited higher catalytic activity than PQPBr-OH with one hydroxyl, suggesting that the OH groups activated the epoxide more easily through multiple hydrogen bonding and, thus, enhanced catalytic efficiencies [8,52].…”

Section: Catalytic Activitymentioning

confidence: 99%

“…Under the same conditions, the nonionic polymer POP-PPh 3 gave a negligible yield of cyclic carbonate, verifying that catalytic active sites originated from the ionic moiety (Table 3, entry 4). Previous reports indicated that the reaction temperature had an important effect on the catalytic performance of the catalysts for the cycloaddition of epoxides with CO 2 [33][34][35][36][37][38]. Therefore, the influence of reaction temperature was studied (Table 3, entries 5-8).…”

Section: Catalytic Activitymentioning

confidence: 99%

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Phosphonium-Based Porous Ionic Polymer with Hydroxyl Groups: A Bifunctional and Robust Catalyst for Cycloaddition of CO2 into Cyclic Carbonates

et al. 2020

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The integration of synergic hydrogen bond donors and nucleophilic anions that facilitates the ring-opening of epoxide is an effective way to develop an active catalyst for the cycloaddition of CO2 with epoxides. In this work, a new heterogeneous catalyst for the cycloaddition of epoxides and CO2 into cyclic carbonates based on dual hydroxyls-functionalized polymeric phosphonium bromide (PQPBr-2OH) was presented. Physicochemical characterizations suggested that PQPBr-2OH possessed large surface area, hierarchical pore structure, functional hydroxyl groups, and high density of active sites. Consequently, it behaved as an efficient, recyclable, and metal-free catalyst for the additive and solvent free cycloaddition of epoxides with CO2. Comparing the activity of PQPBr-2OH with that of the reference catalysts based on mono and non-hydroxyl functionalized polymeric phosphonium bromides suggested that hydroxyl functionalities in PQPBr-2OH showed a critical promotion effect on its catalytic activity for CO2 conversion. Moreover, PQPBr-2OH proved to be quite robust and recyclable. It could be reused at least ten times with only a slight decrease of its initial activity.

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“…The study of the preparations and applications of ILs-POSS have been reported by many researchers over the decades. For example, Chen [ 21 ] reported a new family of imidazolium-based ionic porous hybrid polymers (termed IM-iPHPs) with polyhedral oligomeric silsesquioxane (POSS)-derived silanols (Si–OH) towards the efficient catalytic conversion of carbon dioxide (CO 2 ) under mild conditions. Akbari [ 16 ] prepared two novel heterogeneous hybrid catalysts without loss of catalytic activity for at least three and six runs successfully by means of using octa-aminopropyl polyhedral oligomeric silsesquioxane hydrochloride salt (OA-POSS) and ionic liquids, followed by immobilization of Cu and Ag nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

New Functionalized Ionic Liquids Based on POSS for the Detection of Fe3+ Ion

Feng

2021

Polymers

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This study reports a novel series of imidazolium ionic liquids (ILs) based on polyhedral oligomeric silsesquioxanes (POSS) towards effective detection of metal ions, especially Fe3+ ion. 1H, 13C, 29Si NMR, high resolution mass spectra (HRMS) and Fourier transform infrared spectra (FTIR) were applied to confirm the structures of the ILs based on POSS (ILs-POSS). The three ILs-POSS were synthesized via a green chemistry approach—a thiol-ene “click” reaction without metal ions as catalysts. Furthermore, the spherical vesicle structures of the ILs-POSS were observed and caused by self-assembly behaviors. Through comprehensive characterizations, these ILs-POSS have performed excellent thermal stabilities and low glass transition temperatures. In addition, we found it very meaningful that the limits of detection (LODs) of the three ILs-POSS for the detection of the Fe3+ ion were 7.91 × 10−8 M, 1.2 × 10−7 M, and 1.2 × 10−7 M, respectively. These data illustrate that these ILs-POSS have great potential for the detection of the Fe3+ ion. In conclusion, this study not only prepared novel ILs-POSS, but also provided new materials as fluorescent sensors in the detection of Fe3+.

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Imidazolium-based ionic porous hybrid polymers with POSS-derived silanols for efficient heterogeneous catalytic CO2 conversion under mild conditions

Cited by 134 publications

References 62 publications

Porous Aromatic Framework with Tailored Binding Sites and Pore Sizes as a High‐Performance Hemoperfusion Adsorbent for Bilirubin Removal

Porous Aromatic Framework with Tailored Binding Sites and Pore Sizes as a High‐Performance Hemoperfusion Adsorbent for Bilirubin Removal

Phosphonium-Based Porous Ionic Polymer with Hydroxyl Groups: A Bifunctional and Robust Catalyst for Cycloaddition of CO2 into Cyclic Carbonates

New Functionalized Ionic Liquids Based on POSS for the Detection of Fe3+ Ion

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