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Axial enantiomers with donor-regulated TADF feature for multicolor circularly polarized electroluminescence

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Science China Chemistry 2024年第6期67卷 2039-2045页

作者： chen-Hao guo Wen-Long Zhao Ke-Ke Tan wei-chen guo Liheng Feng Chuan-Feng chen Meng Li School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

This study optimized the TADF feature of axial chiral enantiomers through precise donor engineering,and multicolor CP-TADFwas achieved in the axial chiral *** pairs of axial enantiomers with donor-regulated TADF feature,namely(R/S)-TPCBD,(R/S)-DPCBD,and(R/S)-DPACBD,were synthesized by introducing carbazole donors with different substituents onto biphenyl cyanide *** the electron-donating ability of donors increases,the emission of these axial enantiomers ranges from 455,476 to 552 nm,their singlet-triplet energy gaps(ΔE_(ST))gradually decrease from 0.30,0.22 to 0.02 e V,accompanied by an increasement in the transition rate(k_(RISC))of RISC process,and the k_(RISC)of DPACBD could reach up to 7.16×10^(5)s^(-1).These axial enantiomers also exhibit mirror-image CD and circularly polarized luminescence(CPL)***,OLEDs based on TPCBD,DPCBD,and DPACBD as emitter were then fabricated,which displayed blue,green,and orange electroluminescence with EQE_(max)of 13.0%,16.4%,and 25.0%,*** results also exhibited a phenomenon of device efficiency increasing with the enhancement of donor ***,the CP-OLEDs using(R/S)-TPCBD,(R/S)-DPCBD and(R/S)-DPACBD as emitters displayed intense CPEL signals with g_(EL)values of 3.4×10^(-3)/-4.1×10^(-3),3.2×10^(-3)/-3.1×10^(-3)and2.3×10^(-3)/-2.1×10^(-3),*** convenient molecular engineering of donor regulation in the same molecular skeleton,CP-TADF materials with multicolor CPEL and improved device performance could be conveniently achieved.

关键词： axial chirality thermally activated delayed fluorescence circularly polarized luminescence electroluminescence organic light-emitting diodes

Synthesis,spectroscopic properties and applications of novel N-heterocycle-containing benzotriazoles as UV absorbers

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Chinese Chemical Letters 2012年第9期23卷 1019-1022页

作者： Zhi Hua Cui Xi Dong Wang Jiang Chao guo wei guo chen Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education of ChinaZhejiang Sci-Tech UniversityChinaHangzhou 310018 Engineering Research Center for Eco-Dyeing&Finishing of Textiles Ministry of EducationZhejiang Sci-Tech UniversityChinaHangzhou 310018

Two novel N-heterocycle-containing benzotriazole compounds, 5-（5-chloro-2-benzotriazolyl）-6-hydroxy-l,4-dimethyl-3-car- bonitrile-2-pyddone （2） and 4-（5-chloro-2-benzotdazolyl）-5-methyl-2-phenyl-3-pyrazolone （4）, were synthesized from reactant 4- chloro-2-nitroaniline via diazotization, azo coupling, reductive cyclization and acidification. Their structures were confirmed by Fr-IR, 1H NMR, mass spectroscopy and elemental analysis. Their spectral properties were investigated and compared with that of a common commercial benzotriazole UV absorber Tinuvin 326. It is found that the novel N-heterocycle-containing benzotriazole compounds exhibit sharp single peak in the range of 280-400 nm and have much higher molar extinction coefficients than that of Tinuvin 326. Their anti-UV protection properties on polyester fabric were also evaluated and compound 4 was much superior to compound 2 due to its higher exhaustion.

关键词： Benzotriazole UV absorber Pyrazolone Pyridone Anti-UV protection

EFFECTS OF TEMPERATURE AND CONCENTRATION ON RHEO-LOGICAL CHARACTERISTICS OF SURFACTANT ADDITIVE SOLUTIONS

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Journal of Hydrodynamics 2008年第5期20卷 603-610页

作者： ZHANG Hong-xia WANG De-zhong GU wei-guo chen Han-ping School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China

The shear viscosity of turbulent drag-reducing surfactant solution was measured as a function of concentration, shear rate and temperature by using an AG-G2 rheometer （TA Instruments, New Castle, USA）. The experimental results showed complicated rheological behavior with the concentration in large. The Bird-Carreau model was found to fit well to the measured rheological results. The characteristics for the parameters ηo-ηx and λ dependence on temperature were also studied.

关键词： shear viscosity surfactant solution drag reduction Bird-Carreau model AR-G2 rheometer

Arg-gly-asp-mannose-6-phosphate inhibits activation and proliferation of hepatic stellate cells in vitro

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World Journal of Gastroenterology 2006年第8期12卷 1303-1307页

作者： Lian-Sheng Wang Ying-wei chen Ding-guo Li Han-Ming Lu Digestive Disease Laboratory Xinhua Hospital Shanghai Second Medical University Shanghai 200092 China

AIM： To investigate the effect of arg-gly-asp-mannose-6 phosphate （RGD-M6P） on the activation and proliferation of primary hepatic stellate cells in vitro. METHODS： Hepatic steUate cells （HSCs） were isolated from rats by in situ collagenase perfusion of liver and 18% Nycodenz gradient centrifugation and cultured on uncoated plastic plates for 24 h with DMEM containing 10% fetal bovine serum （FBS/DMEM） before the culture medium was substituted with 2% FBS/DMEM for another 24 h. Then, HSCs were cultured in 2% FBS/DMEM with transforming growth factor 131, M6P, RGD, or RGD- M6P, respectively. Cell morphology was observed under inverted microscope, smooth muscle α-actin （α-SMA） was detected by immunocytochemistry, type Ⅲ procollagen （PCⅢ） in supernatant was determined by radioimmunoassay, and the proliferation rate of HSCs was assessed by flow cytometry. RESULTS： RGD-M6P significantly inhibited the morphological transformation and the α-SMA and PC Ⅲ expressions of HSCs in vitro and also dramatically prevented the proliferation of HSCs in vitro. Such effects were remarkably different from those of RGD or M6R CONCLUSION： The new compound, RGD-M6P, which has a dramatic effect on primary cultured HSCs in vitro, can inhibit the transformation of HSCs in culture caused by TGFβ1, suppresses the expression of PCIII and decreases proliferation rate of HSC. RGD-M6P can be applied as a selective drug carrier targeting at HSCs, which may be a new approach to the prevention and treatment of liver fibrosis.

关键词： RGD Mannose-6-phosphate Hepatic stellate cell Liver fibrosis

Sequence and phylogenetic analysis of hemagglutinin genes of H9N2 influenza viruses isolated from chicken in China from 2013 to 2015

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Journal of Integrative Agriculture 2016年第11期15卷 2604-2612页

作者： SU Xiao-na XIE Qing-mei LIAO Chang-tao YAN Zhuan-qiang chen wei-guo BI Ying-zuo chen Feng College of Animal Science South China Agricultural University/Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding Guangzhou 510642 P.R. China Guangdong Provincial Key Laboratory of Animal Health Aquaculture and Environmental Control Guangzhou 510642 P.R. China Key Laboratory of Chicken Genetics Breeding and Reproduction Ministry of Agriculture Guangzhou 510642 P.R. China Guangdong Wen's Foodstuffs Group Co. Ltd. Yunfu 527439 P.R. China

H9N2 avian influenza virus（AIV） infection is a major problem in poultry industry worldwide. In this study, molecular characterizations and phylogenetic relationships of hemagglutinin（HA） gene sequences of H9N2 AIV of 5 Chinese isolates in 2014 recently available in Gen Bank, 3 widely used vaccine strains, and 52 novel isolates in China from 2013 to 2015 were analyzed. The homology analysis showed that the nucleotide sequences of HA gene of these recent Chinese H9N2 AIV isolates shared homologies from 94.1 to 99.9%. Phylogenetic analysis showed that all isolates belonged to AIV lineage h9.***.2.5. Fifty-six out of the 57 recent Chinese H9N2 AIV isolates had the motifs PSRSSR↓GLF at the cleavage sites within the HA protein, while one isolate PWH01 harbored LSRSSR↓GLF. Remarkably, all of the recent Chinese H9N2 AIV strains had the Q216 L substitution in the receptor binding site, which indicated that they had potential to infect humans. Most of recent Chinese H9N2 AIV isolates lost the potential N-linked glycosylation site at residues 200–202 compared with vaccine strains. This present study demonstrated that AIV lineage h9.***.2.5 was more predominant in China than other lineages as it harbored all the H9N2 AIV isolated between 2013 and 2015. Also we showed the importance of continuous surveillance of emerging H9N2 AIV in China and update of vaccine formulation accordingly in order to prevent and control H9N2 AIV.

关键词： avian influenza virus H9N2 subtype phylogenetic analysis hemagglutinin gene

Genetic Relationships Among Chinese Maize OPVs Based on SSR Markers

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Journal of Integrative Agriculture 2013年第7期12卷 1130-1137页

作者： SONG Li-ya LIU Xue chen wei-guo HAO Zhuan-fang BAI Li ZHANG De-gui Beijing Key Laboratory of Plant Resources Research and Development Beijing Technology and Business University Institute of Crop Science Chinese Academy of Agricultural Sciences

Bulk-SSR method was used to analyze the genetic diversity of 44 open-pollinated varieties collected from Henan, Shandong, Shanxi, and Jilin provinces and Guangxi Zhuang Autonomous Region, China using 70 pairs of SSR primers. The purposes of this study were to （1） compare the genetic diversity among 44 Chinese maize open-pollinated varieties; （2） estimate the minimum number of alleles for construction of a stable dendrogram; and （3） trace the genetic relationships among local germplasm from different regions of China. In total, these 70 SSR primers yielded 292 alleles in 176 samples （4×44） analyzed. The number of alleles per locus was 4.17 on average and ranged from 2 to 8. The highest number of alleles per open-pollinated variety （55.25） was detected in Shanxi germplasm, which indicated that open-pollinated varieties from Shanxi possessed the largest genetic diversity among those from the five locations. The correlation coefficients between different genetic similarity matrices suggested that 200 alleles were sufficient for analysis of the genetic diversity of these 44 open-pollinated varieties. The cluster analysis showed that 44 open-pollinated varieties collected from three growing regions in China were accurately classified into three groups that were highly consistent with their geographic origins, and there is no correlation between GS and geographic distance in this study.

关键词： Bulk-SSR genetic diversity maize OPVs

Synthesis of an electron-rich aniline-containing dye and its dyeing behaviors on silk through a three-component Mannich-type reaction

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Chinese Chemical Letters 2015年第2期26卷 259-262页

作者： Xiao-Jun Zhao Zhi-Hua Cui Ren-Liang Wang Xin Li Su-Ju Fan wei-guo chen Engineering Research Center for Eco-Dyeing & Finishing of Textiles Ministry of Education of China Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education of China Zhejiang Longsheng Group Co. Ltd.

Under the guidance of the finding that the tyrosine residues in proteins could undergo three-component Mannich-type reactions with formaldehyde and electron-rich aniline-containing compounds,which forms covalent bonding connections between the protein of interest and the aniline with high levels of selectivity under relatively mild conditions,an orange aromatic primary amine-containing acid dye AMODB was designed and readily *** molecular structure was characterized by FTIR,^1H NMR,mass spectrometry and elemental *** synthesized dye and a similar control dye（*** Yellow 11） without primary amine groups were applied to dye silk fabric by three dyeing processes：Mannich-type dyeing（with and without the addition of formaldehyde） and acidic *** washing and rubbing fastness properties with different dyeing methods were examined and *** was found that the dyed silk fabric with AMODB by the Mannich-type dyeing showed higher color depth,better anti-stripping ability to DMF and better washing fastness than those of the dyed silk fabric with *** Yellow 11 by acidic dyeing due to the covalent bond formation between the dye chromophore of AMODB and silk *** addition,mild Mannich dyeing conditions suitable for silk（AMODB at 3%owf,75：1 liquor-to-goods ratio,dyebath pH 5.5,30℃,10 h） were provided.

关键词： Aromatic primary amine Wet fastness Mannich reaction Acid dye Silk

Facile synthesis and properties of alkali-clearable azo disperse dye containing a carboxylic ester moiety

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Chinese Chemical Letters 2014年第8期25卷 1121-1124页

作者： Zhi-Hua Cui Xiao-Hong cheng Xin Li Hong-Hui Lu Xi-Dong Wang wei-guo chen Engineering Research Center for Eco-Dyeing & Finishing of Textiles Ministry of Education of China Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education of China Zhejiang Jihua Group Co. Ltd.

A yellow, alkali-clearable azo disperse dye containing a carboxylic ester moiety was readily synthesized from the reactant p-aminobenzoic acid by successive diazotization, coupling reaction, chlorination and esterification with ethanol. Then its molecular structure was characterized by FTIR,1H NMR,13 C NMR,mass spectrometry and elemental analysis. The synthesized dye and a similar control dye containing the acylamide moiety（I） were applied to dyeing poly（ethylene terephthalate） fabric and their washing and rubbing fastness properties with different post-treatment methods（reduction clearing and alkali clearing） were examined and compared. It is found that the ester-containing disperse dye shows good alkali-clear ability on poly（ethylene terephthalate） fabric and contaminates little to environment due to the absence of reductants, as well as low toxicity and easy recycling of the hydrolysates.

关键词： Alkali-clearable Synthesis Carboxylic ester Disperse dye PET

Primary prostate Burkitt's lymphoma resected with holmium laser enucleation of the prostate:A rare case report

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World Journal of Clinical Cases 2023年第18期11卷 4406-4411页

作者： Yu-Fan Wu Xiang Li Jun Ma Dan-Yu Ma Xue-Ming Zeng Qi-wei Yu wei-guo chen Department of Urology Kunshan Hospital of Traditional Chinese MedicineKunshan 215300Jiangsu ProvinceChina Department of Urology The First Affiliated Hospital of Soochow UniversitySuzhou 215000Jiangsu ProvinceChina Department of Oncology The Third Affiliated Hospital of Soochow UniversitySuzhou 215300Jiangsu ProvinceChina

BACKGROUND Primary prostate Burkitt's lymphoma is a rare and aggressive condition with a poor *** clinical presentation can be challenging to differentiate from benign prostatic *** the rarity of primary prostate Burkitt's lymphoma,its diagnosis and treatment remain *** SUMMARY This report presents a case of a 57-year-old male with primary prostate Burkitt's lymphoma,initially misdiagnosed as prostatic *** case's operative process,intraoperative findings and postoperative management are discussed in *** Primary prostate lymphoma is difficult to distinguish from other prostate *** laser enucleation of the prostate(HoLEP),a minimally invasive procedure,is crucial in diagnosing and treating this rare *** should remain vigilant and thoroughly combine physical examination,imaging and test results when encountering patients of younger age with small prostate size but a rapid progression of lower urinary tract *** is an essential diagnostic and therapeutic tool in managing primary prostate Burkitt's lymphoma.

关键词： Primary prostate Burkitt's lymphoma Holmium Laser enucleation of the prostate Prostate hyperplasia Case report