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22 results on '"Nan, Guangming"'

2. Visible–Light–Induced Phosphorylation Reaction of α‐Diazoesters with H‐Phosphine Oxides to Construct (Z)‐Phosphinic Hydrazones.

Author

Feng, Yaping, Ding, Hongyu, Liu, Ruisheng, Wei, Wei, Nan, Guangming, and Yi, Dong

Subjects
PHOSPHORYLATION, OXIDES, PHOTOISOMERIZATION, HYDRAZONES, PHOSPHINE oxides
Abstract

A convenient visible–light–promoted phosphorylation reaction of α‐diazoesters with H‐phosphine oxides for the preparation of (Z)‐phosphinic hydrazones has been explored. This reaction could be performed under mild conditions to afford a series of (Z)‐phosphinic hydrazones in moderate to good yields through photoisomerization of C=N bond. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Structure–Property Relationship, Glass Transition, and Crystallization Behaviors of Conjugated Polymers.

Author

Qu, Tengfei, Nan, Guangming, Ouyang, Yan, Bieketuerxun, Bahaerguli., Yan, Xiuling, Qi, Yunpeng, and Zhang, Yi

Subjects
*CONJUGATED polymers, *POLYMER structure, *GLASS transition temperature, *CRYSTALLIZATION, *ATOMIC force microscopy, *DISCONTINUOUS precipitation, *GLASS transitions
Abstract

Conjugated polymers have gained considerable interest due to their unique structures and promising applications in areas such as optoelectronics, photovoltaics, and flexible electronics. This review focuses on the structure–property relationship, glass transition, and crystallization behaviors of conjugated polymers. Understanding the relationship between the molecular structure of conjugated polymers and their properties is essential for optimizing their performance. The glass transition temperature (Tg) plays a key role in determining the processability and application of conjugated polymers. We discuss the mechanisms underlying the glass transition phenomenon and explore how side-chain interaction affects Tg. The crystallization behavior of conjugated polymers significantly impacts their mechanical and electrical properties. We investigate the nucleation and growth processes, as well as the factors that influence the crystallization process. The development of the three generations of conjugated polymers in controlling the crystalline structure and enhancing polymer ordering is also discussed. This review highlights advanced characterization techniques such as X-ray diffraction, atomic force microscopy, and thermal analysis, which provide insights into molecular ordering and polymer–crystal interfaces. This review provides an insight of the structure–property relationship, glass transition, and crystallization behaviors of conjugated polymers. It serves as a foundation for further research and development of conjugated polymer-based materials with enhanced properties and performance. [ABSTRACT FROM AUTHOR]

Published
2023
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9. Chemical Constituents and Health Benefits of Four Chinese Plum Species

Author

Liu, Wei, Nan, Guangming, Nisar, Muhammad Farrukh, and Wan, Chunpeng

Subjects
Article Subject
Abstract

Prunus is a large genus in the Rosaceae family of flowering plants, comprising over 340 species inhabiting variable landscapes in the world. Over 500 listed phytochemicals have been isolated from this single genus so far. The present study focused four Chinese Prunus species, viz., Prunus cerasifera, Prunus domestica, Prunus salicina, and Prunus spinosa, due to their uses, demand, nutritional value, medicinal importance, and diverse biological potential. The current review article highlights the details about the active phytochemicals and various pharmacological activities already reported. Almost 212 compounds, the majority of which are flavonoids, phenolic acids, anthocyanins, and their derivatives, which have been isolated from these four Prunus species fall in different categories and are helpful to evade chronic oxidative stress-mediated diseases. A huge variation exists in the total phytochemicals composition in different Prunus species, making these species to have different biological activities in multiple disease conditions, and even the same variety growing under different edaphic conditions may have different antioxidant capacities. It is suggested to perform extensive and indepth studies to find new phytochemicals from these four Chinese Prunus species which could boost the local industry to fulfill the increasing demands.

Published
2020
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21. Cis-chelated palladium(II) complexes of biphenyl-linked bis(imidazolin-2-ylidene): synthesis and catalytic activity in the Suzuki-Miyaura reaction.

Author

Nan, Guangming, Rao, Bin, and Luo, Meiming

Subjects
*CHELATION, *PALLADIUM compounds, *METAL complexes, *COMPLEX compounds synthesis, *CATALYTIC activity, *SUZUKI reaction, *CHLORIDES, *LIGANDS (Chemistry)
Abstract

A new type of biaryl-linked bis(imidazolin-2-ylidene) ligand precursor and corresponding cischelated bis-N-heterocyclic carbene?Pd(II) complexes have been synthesized starting from 6,6'- dimethyl-2,2'-dinitro-1,1'-biphenyl. The catalytic activity of these NHC-Pd(II) complexes in the Suzuki?Miyaura reactions of aryl chlorides has also been investigated affording biaryls in good to excellent yields. [ABSTRACT FROM AUTHOR]

Published
2011

22. ChemInform Abstract: Indium(III) Catalyzed Direct sp3-sp C-C Bond Formation from Alcohols and Terminal Alkynes.

Author

Nan, Guangming and Zhou, Jun

Subjects
*INDIUM ions, *METAL catalysts, *CARBON-carbon bonds, *RING formation (Chemistry), *ALCOHOLS (Chemical class), *ALKYNES, *LIGANDS (Chemistry)
Abstract

The method presented here does not require any ligand, base or additive and tolerates a variety of aromatic and aliphatic alkynes as well as alcohols including benzylic, allylic, and propargylic ones. [ABSTRACT FROM AUTHOR]

Published
2014
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