Xi Zeng

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc2cz8d1

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[Rhodamine-triazine fluorescence probe recognition for Al3+ and Cr3+].

PubMed (2013)

Yi Chen Yan Zhang Xi Zeng Lan Mu Jun Li

A symmetrical rhodamine-triazine derivative was synthesized through step-by-step substitution of rhodamine B ethylenediamine with two chlorines on cyanuric chloride. It showed an extreme selectivity for Al3+ and Cr3+ over other common metal ions and strong fluorescence emission and UV-Visible absorption in the ethanol solution of pH 4. Due to the difference in complexing ability, the recognition of the derivative for Al3+ and Cr3+ was not interfered by other coexisting ions. Under certain conditions, the derivative can be used as high selectivity and high sensitivity Al3+ or Cr3+ fluorescence and colorimetric enhanced probe.

Ethylene diamine

Cyanuric chloride

Triazine

Rhodamine

Derivative (finance)

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Positive allosteric binding behavior of pyrene-appended triazole-modified thiacalix[4]arene-based fluorescent receptors

Tetrahedron (2014)

Hirotsugu Tomiyasu Naoki Shigyo Xin‐Long Ni Xi Zeng Carl Redshaw

Triazole

10.1016/j.tet.2014.08.068

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A three-dimensional (time, wavelength and intensity) functioning fluorescent probe for the selective recognition/discrimination of Cu²⁺, Hg²⁺, Fe³⁺ and F⁻ ions

Dalton Transactions (2018)

Qin Ruan Lan Mu Xi Zeng Jiang‐Lin Zhao Li Zeng

We have strategically incorporated three different fluorophores at tren to construct a multi-energy donor/acceptor "smart" probe L. This probe operates by using three-dimensional scales (response time, wavelength and fluorescence intensity) which allows for the selective recognition and discrimination of the Cu2+, Hg2+, Fe3+ and F- ions.

Intensity

10.1039/c7dt04785a

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CCDC 1063255: Experimental Crystal Structure Determination

The Cambridge Structural Database (2015)

Jiang‐Lin Zhao Hirotsugu Tomiyasu Chong Wu Hang Cong Xi Zeng

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Crystal (programming language)

10.5517/cc14pdks

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CCDC 1026081: Experimental Crystal Structure Determination

The Cambridge Structural Database (2015)

Hirotsugu Tomiyasu Jiang‐Lin Zhao Xin‐Long Ni Xi Zeng M.R.J. Elsegood

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cc13fqdn

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Studies on the chemical components of Polytrichum commune

Shandi Nongye Shengwu xuebao (2008)

Xi Zeng

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Synthesis of a functionalised calix[4]arene and its interactions with hemicucurbit[6,7]urils and cucurbit[8]uril

Tetrahedron (2018)

Jin Ming Zhu Lixia Chen Kai Chen Xi Zeng Zhu Tao

Moiety

Proton NMR

Calixarene

10.1016/j.tet.2018.06.020

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CCDC 645352: Experimental Crystal Structure Determination

The Cambridge Structural Database (2009)

Hui Fang Xi Zeng Xiao‐Hua Zhou Chen Shi Chun Lin Ni

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccpnjtn

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Carbon Structure of Coal from the CP/MAS ¹³C NMR Spectra: Effect of Contact Time and Potential Quantitative Modification

Energy & Fuels (2024)

Tong Lv Mengxiang Fang Xi Zeng Jiqing Yan Yu Huang

Carbon structures are important for converting coal into chemical products and carbon materials. Solid-state 13C nuclear magnetic resonance (NMR) spectroscopy is a powerful approach for determining the structural characteristics of carbon in coal. However, there is much controversy regarding the quantitative reliability of typical cross-polarization magic angle spinning (CP/MAS) 13C NMR experiments of coal. This study systematically investigated the effect of one of the important factors, CP contact time, using six different coal types with Vdaf values ranging from 6% to 44%. A series of experimental results at variable contact times from 0.01 to 10 ms indicated that aromatic and aliphatic carbons undergo polarization transfer at different rates, and the nonprotonated carbon of aromatic groups polarized 2–3 times more slowly than that of aliphatic groups. It is challenging for a single CP/MAS 13C NMR experiment with coal to ensure that each type of carbon is sufficiently polarized before the signal decay of the proton spin–lattice relaxation. As a potential quantitative indicator, the initial magnetization intensity independent of contact time was obtained using a classical five-parameter model for CP dynamics, and the initial aromaticity was further calculated. A linear correlation between the apparent and initial aromaticity was introduced into a calibration method of model compounds to refine the effect of contact time. The modified carbon structural parameters of the coal samples showed better agreement in terms of the H/C atomic ratio, Fourier transform infrared spectroscopy, and empirical aromaticity formulas. These results will help to provide a convenient reference for the quantitative analysis of the carbon structure in coal.

Magic angle spinning

Carbon fibers

10.1021/acs.energyfuels.3c04714

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H-Index

i-10 index

Papers

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H-Index

i-10 index