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Acid-induced tunable white light emission based on triphenylamine derivatives

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Chinese Chemical Letters 2021年第4期32卷 1537-1540页

作者： Xi Liu Yi Qin Junlong Zhu Xiaoli Zhao Tanyu Cheng Yanrong Jiang Haitao Sun Lin Xu Shanghai key laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China key laboratory of Resource Chemistry of Ministry of Education.Shanghai key laboratory of Rare Earth Functional Materials.Shanghai Normal University Shanghai 200234China state key laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China state key laboratory of fine chemicals Dalian University of TechnologyDalian 116024China

A series of triphe nylamine(TPA)derivatives with various substituent groups were prepared and showed different absorption and fluorescence characteristics due to the substituent *** account of the existence of pyridine units,these TPA derivatives exhibited acid-induced tunable multicolor fluorescence emission including white light *** addition,acid-induced fluorescence regulation of these compounds has been also realized in the solid state,which enable them to be successfully constructed the stimuli-responsive fluorescent films and fluorescent inks for inkjet printing.

关键词： Triphenylamine Fluorescence regulation White light emission Substituent effect Intramolecular charge transfer

Cu2O-Mediated Room Temperature Cyanation of Aryl Boronic Acids/Esters and TMSCN

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Chinese Journal of Chemistry 2013年第1期31卷 27-30页

作者： Yong Ye Yanhua Wang Pengtang Liu Fushe Han Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China state key laboratory of fine chemicals Dalian University of Technology Dalian Liaoning 116024 China Changchun University of Science and Technology Changchun Jilin 130022 China

A method for the efficient and reliable synthesis of aryl nitriles via the Cu20-catalyed cross-coupling of aryl boronic acids or esters and TMSCN is presented. A broad range of substrates decorated by electron-rich and defi- cient, sterically very congested, and labile functionalities were tolerated. Moreover, the reaction can proceed under mild conditions at room temperature. These advantages paired with the use of cheap, readily available, and halo- gen-free Cu20 as catalysts make the protocol an appealing option for aryl cyanations.

关键词： copper boronic acid boronic ester cyanation aryl nitrile

Ionic Liquids-Assisted Highly Luminescent Copper Nanoclusters with Triangle Supramolecular Nanostructures

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Chinese Journal of Chemistry 2021年第7期39卷 1867-1870页

作者： Bingyan Han Qin Yan Ze Xin Qifang Yan Jingmei Jiang state key laboratory of fine chemicals Dalian University of TechnologyDalianLiaoning116023 China School of Chemical Engineering Dalian University of TechnologyPanjinLiaoning124221 China

Main observation and conclusion A novel and facile approach towards highly luminescent CuNCs@MMI(2-mercapto-1-methylimidazole)has been developed within 30 s with the assistance of ionic liquids(ILs)-[Bmim]BF_(4).FT-IR... 详细信息

关键词： Nanostructures Ionic liquids Aggregation Surface analysis [Bmim]BF_(4)

The control and optimization of macro/micro-structure of ion conductive membranes for energy conversion and storage

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Chinese Journal of Chemical Engineering 2016年第5期24卷 558-571页

作者： Xiaoming Yan Wenji Zheng Xuehua Ruan Yu Pan Xuemei Wu Gaohong He state key laboratory of fine chemicals School of Petroleum and Chemical EngineeringDalian University of Technology Research and Development Center of Membrane Science and Technology School of Chemical EngineeringDalian University of Technology

Ion conductive membranes(ICMs)are frequently used as separators for energy conversion and storage technologies of fuel cells,flow battery,and hydrogen pump,because of their good ion-selective conduction and low electronic ***,this feature article reviews the recent studies on the development of new nonfluorinated ICMs with low cost and their macro/micro-structure *** general,these new nonfluorinated ICMs have lower conductivity than commercial perfluorinated ones,due to their poor ion transport *** ion exchange capacity(IEC)would create more continuous hydrophilic channels,thus enhancing the ***,high IEC also expands the overall hydrophilic domains,weakens the interaction between polymer chains,enhances the mobility of polymer chains,and eventually induces larger *** micro-scale expansion and macro-scale swelling of the ICMs with high IEC could be controlled by limiting the mobility of polymer *** on this strategy,some ef ficient techniques have been developed,including covalent crosslinking,semi-interpenatrating polymer network,and ***,this review introduces the optimization of macro/microstructure of both perfluorinated and nonfluorinated ICMs to improve the ***-scale multilayer composite is an ef ficient way to enhance the mechanical strength and the dimensional stability of the ICMs,and could also decrease the content of per fluorosulfonic acid resin in the membrane,thereby reducing the cost of the perfluorinated *** side chain,multiple functionalization,small molecule inducing micro-phase separation,electrospun nano fiber,and organic–inorganic hybrid could construct more ef ficient ion transport channels,improving the ion conductivity of ICMs.

关键词： Ion conductive membranes Macrostructure Microstructure Optimization

Insights into bishemicyanines with long emission wavelengths and high sensitivity in viscous environments

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Chinese Chemical Letters 2020年第6期31卷 1402-1405,F0002页

作者： Jianfang Cao Wen Sun Jiangli Fan state key laboratory of fine chemicals Dalian University of TechnologyDalian 116024China School of Chemical and Environmental Engineering Liaoning University of TechnologyJinzhou 121001China

A systematic spectral analysis was presented for bishemicyanine dyes(Hsd and D2)and monohemicyanine dyes(Hs and DSMI).The bishemicyanine dyes displayed long emission wavelengths,large Stokes shifts,low background quantum yields in aqueous solutions and high sensitivity in viscous *** understanding of the structure-property relationships could benefit the design of improved *** studies on these dyes revealed the three conjugated forms of bishemicyanines are in equilibrium due to two positive charges and a branched bulk *** possessed obviously lower rotating energy barrier of C-C bond rotation compared to the monohemicyanine ***,the synergetic effects of the rotation about theφ4 bond,φ5 bond andφ7 bond of the bishemicyanines(Hsd and D2)lead to lower fluorescence quantum yields in a free state and larger fluorescence quantum yield enhancements in viscous environment compared to that of monohemicyanine dyes(Hs and DSMI).The results demonstrate a foundation for interpretation of the behavior of the dyes,thus providing guidelines for future of new bishemicyanine fluorophores with specific applications.

关键词： Bishemicyanine dyes Long emission wavelength Low background quantum yield Rotating energy barrier Density functional calculations

Achieving an electron transfer photochromic complex for switchable white-light emission

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Chinese Chemical Letters 2022年第6期33卷 3203-3206页

作者： Qi Li Wuji Wei Zhenzhen Xue Ying Mu Jie Pan Jixiang Hu Guoming Wang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Tuning white-light emission via free radicals is still a challenge in molecular-based functional ***, a new photoactive Zn^(2+) oxalate-based chain containing a polypyridine ligand was designed and synthesized with remarkably bifunctional photochromism and photo-actuated greenish white-light emission after UV, sunlight or Xe lamp light irradiation at room temperature. The photo-actuated coloration process was induced by the photogeneration of stable radicals originated from intermolecular electron transfers from oxalate components to the protonated polypyridine units, as demonstrated by UV–vis, IR,electron spin resonance and X-ray photoelectron spectra and magnetic measurements. Importantly, the on/off greenish white light emission(WLE) could be reversibly switched by generation and elimination of radicals via light irradiation and heat treatment, providing a feasible strategy for designing photoswitchable light emission diodes materials.

关键词： Charge separation Electron transfer Photochromism Photogenerated radicals White-light emission

A novel Ag/ZnO core-shell structure for efficient sterilization synergizing antibiotics and subsequently removing residuals

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Green Energy & Environment 2024年第2期9卷 366-377页

作者： Wenmei Han Wenli Wang Jie Fan Runping Jia Xuchun Yang Tong Wu Qingsheng Wu School of Chemical Science and Engineering Shanghai Key Laboratory of Chemical Assessment and SustainabilityInstitute of Advanced StudyTongji UniversityShanghai200092China College of Textile and Clothing Engineering China National Textile and Apparel Council Key Laboratory of Natural DyesSoochow UniversitySuzhou215123China Department of Urology Shanghai First People’s HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200080China School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai201418China

The massive use of antibiotics has led to the aggravation of bacterial resistance and also brought environmental pollution *** poses a great threat to human *** the dosage of antibiotics is reduced by increasing its bactericidal performance,the emergence of drug resistance is certainly delayed,so that there's not enough time for developing drug resistance during ***,we selected typical representative materials of metal Ag and semiconductor ZnO nano-bactericides to design and synthesize Ag/ZnO hollow core-shell structures(AZ for short).Antibiotics are grafted on the surface of AZ through rational modification to form a composite sterilization *** research results show that the antibacterial efficiency of the composite system is significantly increased,from the sum(34.7%+22.8%-57.5%)of the antibacterial efficiency of AZ and gentamicin to 80.2%,net synergizes 22.7%,which fully reflects the effect of 1+1>***,the dosage of antibiotics can be drastically reduced in this way,which makes both the possibility of bacterial resistance and medical expenses remarkably ***,residual antibiotics can be degraded under simple illumination using AZ-self as a photocatalyst,which cuts off the path of environmental *** short,such an innovative route has guiding significance for drug resistance.

关键词： Ag/ZnO hollow Core-shell structures Antibiotics Gentamycin Synergistic sterilization Photodegradation

Bromination of N-phenyloxypropyl-N'-ethyl-4,4'-bipyridium in cucurbit[8]uril molecular reactor

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Chinese Chemical Letters 2017年第2期28卷 463-466页

作者： Tian-Tian Li Lan-Lan Wen Hai-Long Ji Feng-Yu Liu Shi-Guo Sun state key laboratory of fine chemicals School of Chemistry Dalian University of Technology key laboratory of Xinjiang Endemic Phytomedicine Resources Ministry of Education School of Pharmacy Shihezi University

CB[n]（n= 6-8） is a family of synthetic macrocyclic host molecules composed of n glycoluril units,which can be employed as molecular reactor.N-Phenyloxypropyl-N＇-ethyl-4,4＇-bipyridium（1） was designed to form a host-guest inclusion complex with CB[n]（n = 6-8）,subsequently,the bromination reaction of 1 and its corresponding inclusion complexes was investigated in this *** the case of 1/CB[8],the folded including mode is quite helpful to acquire 1-bormination product completely through intramolecular charge transfer（ICT）,and CB[8]can provide a safe bromination environment for 1.

关键词： Cucurbituril Molecular reactor Intramolecular charge transfer(ICT) Bromination Inclusion

Layered CuNi-Cu_(2)O/NiAlO_(x) nanocatalyst for rapid conversion of p-nitrophenol to p-aminophenol

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Nano Research 2021年第12期14卷 4616-4624页

作者： Lin Fu Wei Zhou Ming Wen Qingsheng Wu Weiying Li Dandan Wu Quanjing Zhu Jiaqi Ran Panpan Ren School of Chemical Science and Engineering College of Environmental Science and EngineeringKey Laboratory of Yangtze River Water EnvironmentMinistry of EducationShanghai Key Laboratory of Chemical Assessment and SustainabilityTongji UniversityShanghai200092China School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai201418China

In order to well arrange active sites and avoid byproducts, the reasonable structured carrier nanocatalyst plays a crucial role in high catalytic performance, but still remains a challenge. Herein, the layered CuNi-Cu_(2)O/NiAlO_(x) nanosheets have been constructed through hydrothermal synthesis followed by calcination and H_(2) reduction treatment process. The in-situ formed CuNi nanoalloys (NAs) and nano-Cu_(2)O were evenly distributed on the bilateral surface of layered NiAlOx nanosheets. Based on the planar structure of nanosheet, the synergy between catalytic active CuNi NAs and photocatalytic active nano-Cu_(2)O endows CuNi-Cu_(2)O/NiAlO_(x) nanosheets with rapid conversion efficiency for catalyzing p-nitrophenol (p-NP, 14 mg·L^(−1)) to p-aminophenol (p-AP) in 32 s with the reaction rate constant k up to 0.1779 s−1, and no obvious performance decay can be observed even over 27 cycles. Moreover, high concentration of p-NP at 10 and 20 g·L^(−1) could be reduced to p-AP within 14 and 20 min, respectively. Such designed nanoalloy/bimetal-oxide heterostructure can provide a solution for rapid conversion of aminoaromatics from nitroaromatics wastewater even at a large concentration range.

关键词： layered CuNi-Cu_(2)O/NiAlO_(x) heterostructure catalyst p-nitrophenol p-aminophenol