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11篇 您的检索式:作者名="Manman Fang"
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1Stimulus-responsive room temperature phosphorescence in purely organic luminogens显示文摘Luminogens that exhibit stimulus-responsive room temperature phosphorescence(RTP)have attracted significant attention for their applications in a wide range of fields such as data storage,sensors,and bio-imaging.However,very few such materials are known,partly because of the unclear internal mechanism.In this review,we summarize recent advances in the field of stimulusresponsive RTP in purely organic luminogens,focusing on their unique emission behaviors and internal mechanisms governing the phenomena.We also attempt to identify the relationship between the mechanism,luminogens,and possible applications.Jie Yang Manman Fang Zhen Li 2020InfoMat2020,2,5:10
2Host–guest materials with room temperature phosphorescence:Tunable emission color and thermal printing patterns显示文摘The research of purely organic materials with long afterglow has drawn more and more attention,especially for those with stimulus‐response characteristic.So far,this kind of material is really very scarce and their performance is not good enough.In this study,we successfully developed an efficient heatingresponsive room‐temperature phosphorescence material with phosphorescence efficiency and lifetime up to 13.4%and 2.08 s through the simple host–guest doping strategy.Further on,by introducing the additional energy acceptor of fluorescein with concentration‐dependent emission to construct ternary doping systems,the afterglow color was extended from blue to yellow.Accordingly,the multicolor thermal printings have been easily realized,showing the great practical application prospects.Yunsheng Wang Jie Yang Yanxiang Gong Manman Fang Zhen Li Ben Zhong Tang 2020SmartMat2020,1,1:8
3Stimulus-Responsive Room Temperature Phosphorescence Materials:Internal Mechanism,Design Strategy,and Potential Application显示文摘CONSPECTUS:Room temperature phosphorescence(RTP)materials,which could respond to external stimuli,such as force,heat,light,electric filed,etc.,have drawn increasing attention for their broad application prospects,especially in the fields of anticounterfeiting,sensors,data storage,and so on.In comparison with the traditional fluorescence ones,RTP materials show much longer emission lifetimes,which can be even caught by the naked eye.Thus,the change in emission lifetime under an external stimulus for RTP materials can be also a potential monitoring parameter,in addition to emission color and intensity.In other words,the number of visual monitoring parameters could increase from two to three in RTP materials,which would greatly facilitate their practical applications.Until now,RTP materials have been typically limited to metal-containing inorganic materials,particularly rare-earth phosphors.Their emissions are governed by the slow liberation of trapped charge carriers from isolated traps of impurities,defects,or ions through thermal stimulation with low luminescence efficiency.However,these materials suffer from some intrinsic disadvantages,including high cost,potential toxicity,and instability in aqueous environments.In order to solve these problems,the purely organic RTP materials should be a good choice.However,these kinds of materials are really scarce now,especially for the ones with stimulus response characteristic.To develop purely organic RTP materials with a stimulus response effect,we and other scientists have tried a lot.Luckily,some progresses have been made.In this Account,we present our recent progress on the stimulus-responsive room temperature phosphorescence of organic materials,mainly focusing on the internal mechanism and potential applications.First,the fundamental knowledge is described to illustrate the importance and main principles of the stimulus-responsive RTP effect.Then,some typical stimulus-responsive RTP materials based on different internal mechanisms are discussed.Mainly,two kinds of stimulus-responsive RTP materials were introduced,namely,single-component and multicomponent ones.Correspondingly,their dynamic change of the RTP property under external stimulus occurred based on the distinct internal mechanisms.For single-component materials,the changes in molecular structure,packing,or conformation,have played a significant role in their corresponding stimulus-responsive RTP effect.As for multicomponent materials,the changed oxygen concentration in matrix and intermolecular distance between different components were found more during the stimulus-responsive RTP process.Accordingly,different potential applications were explored based on the different stimulus-responsive RTP processes.With the classification of stimulus-responsive RTP materials based on different internal mechanisms,the corresponding design strategy could be well proposed,thus guiding the further development of this research field.Jie Yang Manman Fang Zhen Li 2021Accounts of Materials Research2021,2,8:3
4The initial attempt to reveal the emission processes of both mechanoluminescence and room temperature phosphorescence with the aid of circular dichroism in solid state显示文摘A phenothiazine derivative PtzChol containing non-conjugated chiral cholesterol group was designed and synthesized. By analyzing the single crystal structure of PtzChol carefully, coupled with the circular dichroism(CD) signals before and after grinding, it was found that the introduction of cholesterol produced a positive effect on the production of chiral space group, on mechanoluminescence(ML) and room temperature phosphorescence(RTP), and throughout the entire light-emitting process, the CD signal could well reflect the changes of molecular arrangement.Yu Tian Xuekang Yang Yanbin Gong Yunsheng Wang Manman Fang Jie Yang Zhiyong Tang Zhen Li 2021Science China Chemistry2021,64,3:2
5Organic luminescent materials:The concentration on aggregates from aggregation-induced emission显示文摘The research of organic luminescent materials in aggregate has drawn more and more attention for their wide applications.To adjust the luminescent properties for aggregates,a deep understanding of the corresponding internal mechanism is needed.In this short review,a brief introduction of aggregation-induced emission(AIE)and some other solid state luminescence behaviors derived from or parallel to AIE is presented.Particularly,the relationship between emission property and intermolecular/intramolecular interactions is summarized,with the aim to guide the further development of organic optoelectronic materials in aggregate.Jie Yang Manman Fang Zhen Li 2020Aggregate2020,1,1:2
6Fertilization practices affect biological nitrogen fixation by modulating diazotrophic communities in an acidic soil in southern China显示文摘Biological nitrogen(N)fixation(BNF)driven by diazotrophs is an important pathway for N input in agricultural ecosystems.However,free-living BNF and its associated diazotrophic communities under different fertilization practices in acidic soils are poorly studied.Here,we conducted a long-term(29 years)fertilization experiment to explore how fertilization affected free-living BNF via changing biotic and abiotic variables.The fertilization treatments included an unfertilized control(CK),chemical N,phosphorus(P),and potassium(K)fertilizers(NPK),NPK plus lime(NPKL),NPK plus straw(NPKS),NPK plus straw and lime(NPKSL),and NPK plus manure(NPKM).Compared with CK(1.51 nmol C_(2)H_(2)g^(-1)d^(-1)),BNF rate was significantly(P<0.05)higher in NPKM(1.99 nmol C_(2)H_(2)g^(-1)d^(-1))but lower in NPK(0.55 nmol C_(2)H_(2)g^(-1)d^(-1)),NPKL(0.61 nmol C_(2)H_(2)g^(-1)d^(-1)),and NPKS(0.69nmol C_(2)H_(2)g^(-1)d^(-1)).Similarly,chemical fertilization treatments without manure reduced the gene abundance(0.71×10^(8)-1.18×10^(8)copies g^(-1))andα-diversity(Shannon index,1.11-2.43)of diazotrophic communities,whereas the treatment with manure had a positive effect on diazotrophic abundance(3.23×10^(8)copies g^(-1))and Shannon index(3.36).Non-parametric multivariate analysis of variance(PERMANOVA)suggested that manure application(R^(2)=0.212,P=0.001)had a stronger influence on diazotrophic community composition than the addition of lime(R^(2)=0.115,P=0.019)or straw(R^(2)=0.064,P=0.161).Random forest modeling revealed that BNF rates can be significantly(P<0.05)explained by soil pH(9.9%),diazotrophic community attributes(composition,8.5%;Chao 1 index,8.1%;abundance,6.0%;Shannon index,5.7%),and soil total carbon(5.1%).Partial least squares path modeling(PLS-PM)suggested that the diazotrophic community attributes and soil properties mainly provided direct and indirect contributions to the variations in BNF rates,respectively.The dominant genera,Pelomonas,Azospirillum,and Dechloromonas,were positively associated with BNF rates,with their members being observed as keystone species in the community network.Application of chemical fertilizers combined with manure is an effective practice for improving BNF in acidic soils by affecting soil diazotrophic communities.Long GUO Chao WANG Manman ZHENG Wenxing LI Zejiang CAI Boren WANG Juan CHEN Ren Fang SHEN 2023Pedosphere2023,33,2:0
7Mo_(3)(C_(6)X_(6))_(2)(X=NH,S,O)monolayers:two-dimensional conductive metal-organic frameworks as effective electrocatalysts for the nitrogen reduction reaction显示文摘As a constituent element of amino acids,nitrogen plays an important role in nourishing plants,animals and other forms of life.Although the atmosphere is rich in nitrogen gas(N_(2)),the highly inert N≡N bond makes it difficult for most organisms to directly utilize N_(2).The supply of nitrogen in the biological chain mainly depends on the slow conversion of N_(2) to ammonia(NH3)by biological nitrogen fixation[1].Juan Zhang Xinyue Zhu Weixiang Geng Tianchun Li Manman Li Chubo Fang Xiaocao Shan Yafei Li Yu Jing 2021Journal of Energy Chemistry2021,30,10:0
8Recent Process of Photo-responsive Materials with Aggregation-induced Emission显示文摘The research of photo-responsive materials,with changed absorption and emission under light stimulus,has drawn more and more attention due to their wide applications.However,most of them suffered from the notorious aggregation-caused quenching(ACQ)effect,which often led to the unconspicuous luminescent change in photo-responsive process.To solve this problem,the strategy of combining aggregation-induced emission(AIE)and photochromic properties was utilized,which largely enriched the phenomenon and application of photo-responsive materials.This short review summarized the recent progress of photo-responsive AIE materials with changed UV absorbance or PL phenomenon under UV-irradiation,including the types of molecular structures,internal mechanisms and the practical applications.Also,some outlooks were given on the further exploration of this field at the end of this paper.YANG Yujie YANG Jie FANG Manman LI Zhen 2021Chemical Research in Chinese Universities2021,37,3:0
9Effects of Seed Soaking with Paclobutrazol on Early Tillering and Endogenous Hormone Contents of Sugarcane Seedlings显示文摘[Objective] The paper was to explore the effect of seed soaking with paclobutrazol( PP333) on early tillering and endogenous hormone content of sugarcane seedlings.[Method] With the sugarcane variety ROC22 as the experimental material,seeds were soaked in different concentrations of PP333. The number and growth of tiller were investigated,and the contents of endogenous hormones IAA,CTK,ABA and GA3 at two-leaf,four-leaf and six-leaf stages of sugarcane seedlings were measured,to study the effects of seed soaking with PP333 on early tillering and endogenous hormone contents of sugarcane seedlings.[Result] Seed soaking with PP333 could effectively improve and advance tillering occurrence of sugarcane seedlings. The suitable PP333 concentration for sugarcane tillering occurrence,growth and development was 50 mg/L. Seed soaking with PP333 significantly increased the CTK and ABA contents in leaves of sugarcane seedlings,and decreased IAA and GA3 contents. [Conclusion]The paper will provide a theoretical basis for application of PP333 in sugarcane production.Liu Junxian Li Song Tan Fang Xiong Faqian Wang Xiaoman Guo Wenchan Liu Xin He Yibo Wu Kaichao Liu Limin Liu Hongjian Yu Kunxing Dan Ming Lu Manman 2017Plant Diseases and Pests2017,8,1:0
10Direct demonstration of triplet excimer in purely organic room temperature phosphorescence through rational molecular design显示文摘Organic luminogens with room temperature phosphorescence(RTP)have been paid great attention and developed rapidly for their wide application values.Until now,the internal mechanism and source of phosphorescence are still obscure,especially for the relationship between molecular dimer and RTP emission.Hence,we designed and synthesized eight phenothiazine 5,5-dioxide derivatives to directly reveal how the monomer and dimer in packing affect the RTP behavior.Dimers with strongπ-πstacking(θ<20.66°;d<3.86A)lead to pure triplet excimer emission,while those with weakπ-πstacking(27.02°<θ<40.64°;3.84AZhenjiang Liu Yu Tian Jie Yang Aisen Li Yunsheng Wang Jia Ren Manman Fang Ben Zhong Tang Zhen Li 2022Light(Science & Applications)2022,11,6:0
11RNF219 interacts with CCR4-NOT in regulating stem cell differentiation显示文摘Regulation of RNA stability plays a crucial role in gene expression control.Deadenylation is the initial rate-limiting step for the majority of RNA decay events.Here,we show that RING finger protein 219(RNF219)interacts with the CCR4-NOT deadenylase complex.RNF219-CCR4-NOT exhibits deadenylation activity in vitro.RNA-seq analyses identify some of the 2-cell-specific genes and the neuronal genes significantly downregulated upon RNF219 knockdown,while upregulated after depletion of the CCR4-NOT subunit CNOTIO in mouse embryonic stem(ES)cells.RNF219 depletion leads to impaired neuronal lineage commitment during ES cell differentiation.Our study suggests that RNF219 is a novel interacting partner of CCR4-NOT and required for maintenance of ES cell pluripotency.Hao Du Chen Chen Yan Wang Yang Yang Zhuanzhuan Che Xiaoxu Liu Siyan Meng Chenghao Guo Manman Xu Haitong Fang Fengchao Wang Chengqi Lin Zhuojuan Luo 2020Journal of Molecular Cell Biology2020,12,11:0
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