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Your search keyword '"Xing, Guolong"' showing total 173 results
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173 results on '"Xing, Guolong"'

7. Topochemical cross-linking of diacetylene in a highly interpenetrated three-dimensional covalent organic framework.

Author

Liu, Shangqing, Chen, Mengyao, Zhao, Yu, Xing, Guolong, Zhu, Weidong, and Ben, Teng

Subjects
TOPOCHEMICAL reactions, BUTADIYNE, POLYMER structure, POLYMERIZATION
Abstract

Topochemical polymerization is a highly promising and effective method for constructing complex three-dimensional structures and functionalized polymers. Herein, we present for the first time a topochemical reaction of diacetylene within a meticulously designed covalent organic framework (ZNUC-1). Our experimental results revealed that ZNUC-1 underwent a 1,4-addition reaction under thermal induction, forming an ene–yne-conjugated structure. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Nonplanar Rhombus and Kagome 2D Covalent Organic Frameworks from Distorted Aromatics for Electrical Conduction

Author

Xing, Guolong, primary, Zheng, Wenhao, additional, Gao, Lei, additional, Zhang, Ting, additional, Wu, Xiaowei, additional, Fu, Shuai, additional, Song, Xiaoyu, additional, Zhao, Ziqiang, additional, Osella, Silvio, additional, Martínez-Abadía, Marta, additional, Wang, Hai I., additional, Cai, Jinming, additional, Mateo-Alonso, Aurelio, additional, and Chen, Long, additional

Published
2022
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27. A double helix of opposite charges to form channels with unique CO2 selectivity and dynamics† †Electronic supplementary information (ESI) available. CCDC 1865475 and 1865476. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8sc04376k

Author

Xing, Guolong, Bassanetti, Irene, Bracco, Silvia, Negroni, Mattia, Bezuidenhout, Charl, Ben, Teng, Sozzani, Piero, and Comotti, Angiolina

Subjects
Chemistry
Abstract

Electrostatic charges patterning along crystalline channels recognize CO2 with high selectivity and promote its fast screwing dynamics through the crystal at one million steps per second, strongly reminiscent of trans-membrane transport in biological channels., Porous molecular materials represent a new front in the endeavor to achieve high-performance sorptive properties and gas transport. Self-assembly of polyfunctional molecules containing multiple charges, namely, tetrahedral tetra-sulfonate anions and bifunctional linear cations, resulted in a permanently porous crystalline material exhibiting tailored sub-nanometer channels with double helices of electrostatic charges that governed the association and transport of CO2 molecules. The charged channels were consolidated by robust hydrogen bonds. Guest recognition by electrostatic interactions remind us of the role played by the dipolar helical channels in regulatory biological membranes. The systematic electrostatic sites provided the perfectly fitting loci of complementary charges in the channels that proved to be extremely selective with respect to N2 (S = 690), a benchmark in the field of porous molecular materials. The unique screwing dynamics of CO2 travelling along the ultramicropores with a step-wise reorientation mechanism was driven by specific host–guest interactions encountered along the helical track. The unusual dynamics with a single-file transport rate of more than 106 steps per second and an energy barrier for the jump to the next site as low as 2.9 kcal mol–1 was revealed unconventionally by complementing in situ13C NMR anisotropic line-shape analysis with DFT modelling of CO2 diffusing in the crystal channels. The peculiar sorption performances and the extraordinary thermal stability up to 450 °C, combined with the ease of preparation and regeneration, highlight the perspective of applying these materials for selective removal of CO2 from other gases.

Published
2018

40. A double helix of opposite charges to form channels with unique CO2 selectivity and dynamics

Author

Xing, G, Bassanetti, I, Bracco, S, Negroni, M, Bezuidenhout, C, Ben, T, Sozzani, P, Comotti, A, Xing, Guolong, Bassanetti, Irene, Bracco, Silvia, Negroni, Mattia, Bezuidenhout, Charl, Ben, Teng, Sozzani, Piero, Comotti, Angiolina, Xing, G, Bassanetti, I, Bracco, S, Negroni, M, Bezuidenhout, C, Ben, T, Sozzani, P, Comotti, A, Xing, Guolong, Bassanetti, Irene, Bracco, Silvia, Negroni, Mattia, Bezuidenhout, Charl, Ben, Teng, Sozzani, Piero, and Comotti, Angiolina

Abstract

Porous molecular materials represent a new front in the endeavor to achieve high-performance sorptive properties and gas transport. Self-assembly of polyfunctional molecules containing multiple charges, namely, tetrahedral tetra-sulfonate anions and bifunctional linear cations, resulted in a permanently porous crystalline material exhibiting tailored sub-nanometer channels with double helices of electrostatic charges that governed the association and transport of CO2 molecules. The charged channels were consolidated by robust hydrogen bonds. Guest recognition by electrostatic interactions remind us of the role played by the dipolar helical channels in regulatory biological membranes. The systematic electrostatic sites provided the perfectly fitting loci of complementary charges in the channels that proved to be extremely selective with respect to N2 (S = 690), a benchmark in the field of porous molecular materials. The unique screwing dynamics of CO2 travelling along the ultramicropores with a step-wise reorientation mechanism was driven by specific host-guest interactions encountered along the helical track. The unusual dynamics with a single-file transport rate of more than 106 steps per second and an energy barrier for the jump to the next site as low as 2.9 kcal mol-1 was revealed unconventionally by complementing in situ13C NMR anisotropic line-shape analysis with DFT modelling of CO2 diffusing in the crystal channels. The peculiar sorption performances and the extraordinary thermal stability up to 450 °C, combined with the ease of preparation and regeneration, highlight the perspective of applying these materials for selective removal of CO2 from other gases.

Published
2019

41. Tricycloquinazoline‐Based 2D Conductive Metal–Organic Frameworks as Promising Electrocatalysts for CO2 Reduction.

Author

Liu, Jingjuan, Yang, Dan, Zhou, Yi, Zhang, Guang, Xing, Guolong, Liu, Yunpeng, Ma, Yanhang, Terasaki, Osamu, Yang, Shubin, and Chen, Long

Subjects
METAL-organic frameworks, ELECTROCATALYSTS, CATALYTIC activity, OVERPOTENTIAL, CATECHOL, CARBON dioxide
Abstract

2D conductive metal–organic frameworks (2D c‐MOFs) are promising candidates for efficient electrocatalysts for the CO2 reduction reaction (CO2RR). A nitrogen‐rich tricycloquinazoline (TQ) based multitopic catechol ligand was used to coordinate with transition‐metal ions (Cu2+ and Ni2+), which formed 2D graphene‐like porous sheets: M3(HHTQ)2 (M=Cu, Ni; HHTQ=2,3,7,8,12,13‐Hexahydroxytricycloquinazoline). M3(HHTQ)2 can be regarded as a single‐atom catalyst where Cu or Ni centers are uniformly distributed in the hexagonal lattices. Cu3(HHTQ)2 exhibited superior catalytic activity towards CO2RR in which CH3OH is the sole product. The Faradic efficiency of CH3OH reached up to 53.6 % at a small over‐potential of −0.4 V. Cu3(HHTQ)2 exhibited larger CO2 adsorption energies and higher activities over the isostructural Ni3(HHTQ)2 and the reported archetypical Cu3(HHTP)2. There is a strong dependence of both metal centers and the N‐rich ligands on the electrocatalytic performance. [ABSTRACT FROM AUTHOR]

Published
2021
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47. Multifunctional Organosulfonate Anions Self-Assembled with Organic Cations by Charge-Assisted Hydrogen Bonds and the Cooperation of Water

Author

Xing, G, Bassanetti, I, Ben, T, Bracco, S, Sozzani, P, Marchiò, L, Comotti, A, Xing, Guolong, Bassanetti, Irene, Ben, Teng, Bracco, Silvia, Sozzani, Piero, Marchiò, Luciano, Comotti, Angiolina, Xing, G, Bassanetti, I, Ben, T, Bracco, S, Sozzani, P, Marchiò, L, Comotti, A, Xing, Guolong, Bassanetti, Irene, Ben, Teng, Bracco, Silvia, Sozzani, Piero, Marchiò, Luciano, and Comotti, Angiolina

Abstract

The present study focuses on the assembly of organo-cations with organo-anions in water. The anions, characterized by symmetric moieties (carbon-, adamantane-, or calixarene-based) functionalized with directional hydrogen bond (HB) acceptor functions (tetra-sulfonate moieties), are combined with planar guanidinium or terephtalimidamide cations as hydrogen bond donors, the purpose being to integrate water molecules into the lattice. The imbalance between the charge on the two components, and the considerable number of HB donor and acceptor sites, promotes the insertion of water into the structures. In the reported structures, a part of the water molecules serves as a structural linker between the anions and cations, while the remaining molecules cluster into channels and cavities in a loose association with the supramolecular matrix framework.

Published
2018

48. A 3D Organically Synthesised Porous Carbon Material for Lithium Ion Batteries

Author

Zhao, Ziqiang, Das, Saikat, Xing, Guolong, Fayon, Pierre Claude, Heasman, Patrick, Jay, Michael, Bailey, Steven William Dennis, Lambert, Colin John, Yamada, Hiroki, Wakihara, Toru, Trewin, Abbie Elena, Ben, Teng, Qiu, Shilun, Valtchev, Valentin, Zhao, Ziqiang, Das, Saikat, Xing, Guolong, Fayon, Pierre Claude, Heasman, Patrick, Jay, Michael, Bailey, Steven William Dennis, Lambert, Colin John, Yamada, Hiroki, Wakihara, Toru, Trewin, Abbie Elena, Ben, Teng, Qiu, Shilun, and Valtchev, Valentin

Abstract

We report the first organically synthesized sp–sp3 hybridized porous carbon, OSPC‐1. This new carbon shows electron conductivity, high porosity, the highest uptake of lithium ions of any carbon material to‐date, and the ability to inhibit dangerous lithium dendrite formation. The new carbon exhibits exceptional potential as anode material for lithium‐ion batteries (LIBs) with high capacity, excellent rate capability, long cycle life, and potential for improved safety performance.

Published
2018

49. Docking Site Modulation of Isostructural Covalent Organic Frameworks for CO2 Fixation.

Author

Yang, Fan, Li, Yusen, Zhang, Ting, Zhao, Ziqiang, Xing, Guolong, and Chen, Long

Subjects
HYDROXYL group, HETEROGENEOUS catalysts, CATALYTIC activity, RING formation (Chemistry)
Abstract

Three isostructural covalent organic frameworks (COFs) with either methoxyl, hydroxyl, or both groups on the channel wall, are synthesized and served as metal‐free heterogeneous catalysts for chemical fixation of CO2. Among them, the COF decorated with both hydroxyl and methoxyl groups named OMe‐OH‐TPBP‐COF exhibits the highest catalytic activity and efficiency for CO2 cycloaddition under mild conditions. [ABSTRACT FROM AUTHOR]

Published
2020
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50. Rücktitelbild: A 3D Organically Synthesized Porous Carbon Material for Lithium-Ion Batteries (Angew. Chem. 37/2018)

Author

Zhao, Ziqiang, primary, Das, Saikat, additional, Xing, Guolong, additional, Fayon, Pierre, additional, Heasman, Patrick, additional, Jay, Michael, additional, Bailey, Steven, additional, Lambert, Colin, additional, Yamada, Hiroki, additional, Wakihara, Toru, additional, Trewin, Abbie, additional, Ben, Teng, additional, Qiu, Shilun, additional, and Valtchev, Valentin, additional

Published
2018
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