Adsorption performance and mechanisms of Pb(II), Cd(II), and Mn(II) removal by a β-cyclodextrin derivative

Zhang, Mengjiao; Zhu, Liyun; He, Changhua; Xu, Xiaojun; Duan, Zhengyang; Liu, Shuli; Song, Mingyao; Song, Shuangshuang; Shi, Jiemei; Li, Yue; Cao, Guangzhu

doi:10.1007/s11356-018-3989-4

Cited by 30 publications

(11 citation statements)

References 58 publications

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“…With the increase in pH, sotalol was less positively charged, but the retention was shortened, which may be attributed to the variation of ionization degree of hydroxyl and amine on the stationary phase and the increase of EOF. The p K a values of hydroxyl groups and amine groups are in the range of 8.0–12.0 and 9.0–11.0, according to the previous reports. , When the pH was lower than p K a , the ionization of hydroxyl groups increased as the pH changed from 4.0 to 5.5, while the protonation of amine groups decreased. Moreover, the variation of Rs demonstrated that electrostatic attraction existed between the negatively charged stationary phase and the positively charged analytes.…”

Section: Resultssupporting

confidence: 75%

“…The pK a values of hydroxyl groups and amine groups are in the range of 8.0−12.0 and 9.0−11.0, according to the previous reports. 34,35 When the pH was lower than pK a , the ionization of hydroxyl groups increased as the pH changed from 4.0 to 5.5, while the protonation of amine groups decreased. Moreover, the variation of Rs demonstrated that electrostatic attraction existed between the negatively charged stationary phase and the positively charged analytes.…”

Section: Resultsmentioning

confidence: 99%

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Construction of β-Cyclodextrin Covalent Organic Framework-Modified Chiral Stationary Phase for Chiral Separation

Wang

Zhuo

Hou

et al. 2019

ACS Appl. Mater. Interfaces

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Chiral covalent organic frameworks (CCOFs), built by the condensation reactions of organic building blocks with enantiomeric purity and linking subunits, have emerged as a marvelous category of porous crystalline material. In addition to stability and good porosity, CCOFs possess remarkable enantioselectivity, which would be exploited for asymmetric catalysis and chiral separation. β-cyclodextrin (β-CD) and its derivatives, a group of supramolecules with a hydrophobic cavity, have been widely applied to molecular specific recognitions. In this work, the β-CD covalent organic framework (COF) was exploited to construct chiral stationary phase (CSP) for chiral drugs analysis for the first time. We fabricated β-CD COF via the condensation reaction of heptakis(6-amino-6deoxy)-β-CD and terephthalaldehyde at room temperature. β-CD COF-modified capillary columns were subsequently prepared by a photopolymerization method with shortened time and applied for separation of chiral drugs on capillary electrochromatography with good resolution and repeatability. Baseline separation for six enantiomers was achieved and the precisions (relative standard deviations) for intraday, interday, and column-to-column were <2.1%, 4.5%, and 7.3%, respectively. The results reveal that CCOFs-coated capillary columns show great prospect for chromatographic separation of chiral drugs.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Construction of β-Cyclodextrin Covalent Organic Framework-Modified Chiral Stationary Phase for Chiral Separation

Wang

Zhuo

Hou

et al. 2019

ACS Appl. Mater. Interfaces

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“…The Mn 2p spectra of MnCl 2 were deconvoluted into four photoelectron peaks at 641.21, 642.40, 646.91 and 653.55 eV, respectively, while the nitrogen atoms in GT showed two peaks at 398.34 eV and 400.49 eV, which were assigned to N–H and C N, respectively. After Mn 2+ coordination, the four Mn 2p peaks were shifted to lower binding energies ( Figure S5a-S5b ), and the N 1s peaks on GT were shifted to higher binding energies at 398.50 and 400.63 eV, respectively, due to the donation of electrons from terpyridine or amine moieties to Mn 2+ ( Figure S5c-S5d ) [ 63 , 64 ]. These results suggested the successful coordination of Mn 2+ with GT.…”

Section: Resultsmentioning

confidence: 99%

A manganese (II)-based coordinative dendrimer with robust efficiency in intracellular peptide delivery

Ren

Gao

Cheng

2022

Bioactive Materials

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Peptides have gained increasing interests as drug candidates in modern pharmaceutical industry, however, the development of peptide drugs acting on intracellular targets is limited due to their membrane impermeability. Here, we reported the use of metal-terpyridine based coordinative dendrimer for cytosolic peptide delivery. Among the investigated transition metal ions, Mn 2+ -coordinated polymer showed the highest delivery efficiency due to balanced peptide binding and release. It showed robust efficiency in the delivery of peptides with different charge property and hydrophobicity into various primary cells. The efficiency of Mn 2+ -terpyridine based polymer is superior to cell penetrating peptides such as oligoarginines. The material also delivered an autophagy-inducing peptide derived from Beclin-1 into cells and efficiently induced autophagy in the cells. This study provides a promising alternative to cell penetrating peptides for cytosolic peptide delivery.

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“…Cross-linking with epichlorohydrin has been widely used for over 50 years [64]. Another cross-linker, such as polyvinyl alcohol, was also considered for some practical applications, due to their low cost and easy preparation [65]. Chitosan (CS)-gamma CD, an adsorbent, has shown high stability and long life [66], proving to be a practical application.…”

Section: Cross-linkingmentioning

confidence: 99%

Recent Advancements in Cyclodextrin-Based Adsorbents for the Removal of Hazardous Pollutants from Waters

et al. 2022

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Water is an essential substance for the survival on Earth of all living organisms. However, population growth has disturbed the natural phenomenon of living, due to industrial growth to meet ever expanding demands, and, hence, an exponential increase in environmental pollution has been reported in the last few decades. Moreover, water pollution has drawn major attention for its adverse effects on human health and the ecosystem. Various techniques have been used to treat wastewater, including biofiltration, activated sludge, membrane filtration, active oxidation process and adsorption. Among the mentioned, the last method is becoming very popular. Moreover, among the sorbents, those based on cyclodextrin have gained worldwide attention due to their excellent properties. This review article overviewed recent contributions related to the synthesis of Cyclodextrin (CD)-based adsorbents to treat wastewater, and their applications, especially for the removal of heavy metals, dyes, and organic pollutants (pharmaceuticals and endocrine disruptor chemicals). Furthermore, new adsorption trends and trials related to CD-based materials are also discussed regarding their regenerative potential. Finally, this review could be an inspiration for new research and could also anticipate future directions and challenges associated with CD-based adsorbents.

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Adsorption performance and mechanisms of Pb(II), Cd(II), and Mn(II) removal by a β-cyclodextrin derivative

Cited by 30 publications

References 58 publications

Construction of β-Cyclodextrin Covalent Organic Framework-Modified Chiral Stationary Phase for Chiral Separation

Construction of β-Cyclodextrin Covalent Organic Framework-Modified Chiral Stationary Phase for Chiral Separation

A manganese (II)-based coordinative dendrimer with robust efficiency in intracellular peptide delivery

Recent Advancements in Cyclodextrin-Based Adsorbents for the Removal of Hazardous Pollutants from Waters

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