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Efficient One-Pot Access to 2,9-Dihydrothiopyrano[2,3-b]indole Scaffolds Showing Large Stokes Shifts
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作者 Shivendra Singh Sampak Samanta 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2015年第11期1244-1250,共7页
A simple, mild and efficient one-pot approach for the construction of 2-aryl-3-nitro-2,9-dihydrothiopyrano- [2,3-b]indole derivatives has been realized in CH2C12 medium at ambient temperature via three-component tande... A simple, mild and efficient one-pot approach for the construction of 2-aryl-3-nitro-2,9-dihydrothiopyrano- [2,3-b]indole derivatives has been realized in CH2C12 medium at ambient temperature via three-component tandem reaction of N-protected-2-chloro-3-formylindoles, sodium hydrosulfide and β-substituted nitroolefins/δ-substituted nitrodienes using DABCO (10 mol%) as an organocatalyst, followed by dehydration in the presence of activated molecular sieves (4 A). The significant advantages of this protocol are simple operation, shorter reaction time, high atom economy, good to high yields (73%-89%) and wider substrate scope. In addition, all the synthesized com- pounds have shown the large positive Stokes shift values (5632-6081 cm ^-1). 展开更多
关键词 one-pot MCR 2 9-dihydrothiopyrano[2 3-b]indole ORGANOCATALYSIS molecular sieves large Stokes shifts
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Effect of Indole 3-Butyric Acid and Media Type on Adventitious Root Formation in Sheanut Tree (<i>Vitellaria paradoxa</i>C. F. Gaertn.) Stem Cuttings 被引量:4
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作者 Daniel Brain Akakpo Naalamle Amissah +1 位作者 Julius Yeboah Essie Blay 《American Journal of Plant Sciences》 2014年第3期313-318,共6页
Shea nuts play an important role in food security for rural folks within sub-Sahara Africa, serving as the main source of income for many people living in Northern Ghana. Unfortunately, the full economic potential of ... Shea nuts play an important role in food security for rural folks within sub-Sahara Africa, serving as the main source of income for many people living in Northern Ghana. Unfortunately, the full economic potential of the Sheanut tree has not been fully realized due to the difficulty involved in its domestication. This difficulty in vegetatively propagating sheanut trees has greatly hindered its cultivation and the realization of its true economic potential. Two experiments were conducted to investigate the effects of rooting media and varying indole 3-butyric acid (IBA) concentrations on adventitious root formation in cuttings taken from coppiced sheanut trees. Results indicated that 3000 ppm produced significantly (p 0.05) better rooting (57.5%) than 5000 ppm (30%), 7000 ppm (45.0%) and the control (7.5%). Although the levels of soluble sugars (SS) and total free phenols (TFP) in the cutting were significantly (p 0.05) higher at the end of the experiment (after IBA treatment) compared to the start (prior to IBA treatment), the SS and TFP trends observed did not clearly explain the rooting differences found between the IBA levels investigated. Callus formation was significantly (p 0.05) higher (35.0%) in the control (no IBA). Generally, callus formation decreased with increasing IBA concentration. In the rooting media experiment, rooting was significantly (p 0.05) higher in the rice husk medium (35.0%) compared to that in the palm fiber (18.3%), saw dust (14.1%) and top soil (16.7%) media. 展开更多
关键词 Coppiced indole 3-butyric Acid Sheanut TREE Cuttings Rooting Medium
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Effect of newly synthesized 1,2,4-triazino[5,6-b]indole-3-thione derivatives on olfactory bulbectomy induced depression in rats 被引量:1
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作者 Urmila M Aswar Padmaja P Kalshetti +2 位作者 Suhas M Shelke Sharad H Bhosale Subhash L Bodhankar 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2012年第12期992-998,共7页
Objective:To study the derivatives of 1,2,4-triazino[5,6-b]indole-3-thione for antidepressant activity in olfactory bulbectomized(OBX)rats.Out of various derivatives tested for acute tail suspension test,the two deriv... Objective:To study the derivatives of 1,2,4-triazino[5,6-b]indole-3-thione for antidepressant activity in olfactory bulbectomized(OBX)rats.Out of various derivatives tested for acute tail suspension test,the two derivatives showiug prominent action were.selected for bilateral olfactory bulbeetomy rsodel of ehronic depression in rats.Methods:The sub aeute effects of 14-day oral pretreatment of two derivatives labeled as 3a(70 mg/kg)and 3r(70 mg/kg),imipramine(20 mg/kg),fluoxetiue(30 mg/kg)and moclobemide(15 mg/kg)were evaluated on bilateral bulbectomy induced rise in body weight,hyperphagia,hyperactivity,and on sexual dysfunction.The serum sodium concentration,body temperature,and heart rate were also recorded.Results:The derivatives3a and 3r showed reversal of drop in body weight,reversed OBX indueed hyperactivity,normalized body temperature,heart rate,and serum sodium concentration.In elevated maze test,moclobemide,3a,3r treatment significantly redueed time spent in open arm as compared to OBX rats.3a and 3r also irsproved sexual behavior parameters.Conclusions:The present study shows promising antidepressant action and provides a proof of concept for the chronic treatrsent of 3a,3r to treat depression. 展开更多
关键词 1 2 4-triazino-[5 6-b]indole-3-thione OLFACTORY BULBECTOMY ANTIDEPRESSANT activity
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Endogenous nitric oxide and hydrogen peroxide detection in indole-3-butyric acid-induced adventitious root formation in Camellia sinensis 被引量:1
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作者 WEI Kang WANG Li-yuan +4 位作者 RUAN Li ZHANG Cheng-cai WU Li-yun LI Hai-lin CHENG Hao 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2018年第10期2273-2280,共8页
Nitric oxide(NO)and hydrogen peroxide(H2O2)are essential signaling molecules with key roles in auxin induced adventitious root formation in many plants.However,whether they are the sole determinants for adventitio... Nitric oxide(NO)and hydrogen peroxide(H2O2)are essential signaling molecules with key roles in auxin induced adventitious root formation in many plants.However,whether they are the sole determinants for adventitious root formation is worth further study.In this study,endogenous NO and H2O2 were monitored in tea cutting with or without indole-3-butyric acid(IBA)treatment by using the fluorescent probes diaminofluorescein diacetate(DAF-2DA)and 2',7'-dichlorodihydrofluorescein diacetate(DCF-DA),respectively.The overproduction of NO and H2O2 was detected in the rooting parts of tea cuttings treated with or without IBA.But little NO and H2O2 was detected before the initiation phase of tea cuttings even with IBA treatment indicating that they might be not directly induced by IBA.Further carbon and nitrogen analysis found that the overproduction of NO and H2O2 were coincident with the consumption of soluble sugars and the assimilation of nitrogen.These results suggest that rooting phases should be taken into consideration with the hypothesis that auxin induces adventitious root formation via NO-and H2O2-dependent pathways and sink establishment might be a prerequisite for NO and H2O2 mediated adventitious root formation. 展开更多
关键词 nitric oxide hydrogen peroxide indole-3-butyric acid tea cuttings
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Effect of Different Indole-3-Buteric Acid(IBA)Concentrations and Cutting Types on Plane Trees(Platanus orientalis L.) 被引量:1
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作者 Muhammad Razaq Hasnain Alam +1 位作者 Muhammad Irshad Salahuddin 《Journal of Northeast Agricultural University(English Edition)》 CAS 2017年第1期16-20,共5页
Effects of different Indole-3-Buteric Acid (IBA) concentrations (0, 1 000, 1 500 and 2 500 ppm) and curing types (soft wood, semi hard and hard wood) of plane tree were investigated with Randomized Complete Bloc... Effects of different Indole-3-Buteric Acid (IBA) concentrations (0, 1 000, 1 500 and 2 500 ppm) and curing types (soft wood, semi hard and hard wood) of plane tree were investigated with Randomized Complete Block Design (RCBD) at the Agricultural research station, Charsadda. The maximum survival percentage, plant height (cm), root length (era), numbers of roots and root weight per cutting were significantly higher in hard wood cuttings. IBA concentration had no speculative effect on plane tree cuttings. Thus, hard wood cutting was the best choice for plan tree propagation. 展开更多
关键词 Platanus orientalis L. indole-3-buteric Acid (IBA) cutting type propagation
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Synthesis and Crystal Structure of Methyl 3-(5-Bromo-1-ethyl-1H-indole-3-carbonyl)aminopropionate
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作者 李恺平 郑乐 +1 位作者 曾向潮 胡芳 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第7期1044-1048,共5页
Methyl 3-(5-bromo-l-ethyl-lH-indole-3-carbonyl)aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6... Methyl 3-(5-bromo-l-ethyl-lH-indole-3-carbonyl)aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6% yield. Its crystal structure was gotten and determined by X-ray diffraction method. The crystal is of monoclinic, space group P2/c with a = 11.7927(8), b = 14.9342(8), c = 9.0060(5) A, β = 101.558(6)°, V = 1553.93(16) A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ(MoKa) = 2.656 mm-1, Mr = 353.22 and F(000) = 720. The structure was refined to R = 0.0401 and wR = 0.0825 for 1704 observed reflections with I 〉 2σ(I). In the crystal structure, intermolecular N(2)-H(2)...O(1) hydrogen bond and weak intermolecular bonds (C(1)-H(1)...O(1) and C(10)-H(10B)-O(2)) are formed, and π-π stacking also exists. 展开更多
关键词 methyl 3-(5-bromo-1-ethyl-lH-indole-3-carbonyl)aminopropionate indole synthesis crystal structure
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A One-dimensional Cd(Ⅱ)Coordination Polymer Constructed from 1,4-Benzene-dicarboxylic Acid and 3-(2,6-Di(pyrazin-2-yl)pyridin-4-yl)-1H-indole:Synthesis,Structure and Photoluminescence 被引量:2
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作者 谢玲 卢丽萍 朱苗力 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第10期1606-1614,共9页
A new coordination polymer {[Cd(C_(21)H_(14)N_6)(C_8H_4O_4)]·H_2O}_n(1) was synthesized by an elaborate design via the reaction of 3-(2,6-di(pyrazin-2-yl)pyridin-4-yl)-1H-indole(bppi),1,4-benzene-... A new coordination polymer {[Cd(C_(21)H_(14)N_6)(C_8H_4O_4)]·H_2O}_n(1) was synthesized by an elaborate design via the reaction of 3-(2,6-di(pyrazin-2-yl)pyridin-4-yl)-1H-indole(bppi),1,4-benzene-dicarboxylic acid(H2bdc) and cadmium(Ⅱ) nitrate in CH_3OH/H_2O mixed solvents. Complex 1 crystallizes in orthorhombic,space group Ccca with a = 20.012(4),b = 31.881(6),c = 19.808(4) ?,V = 12638(4) ?~3,Z = 16,C_(29)H_(20)CdN_6O_5,M_r = 644.91,D_c = 1.356 g·cm^(-3),μ = 0.735 mm^(-1),F(000) = 5184,GOOF = 1.046,the final R = 0.0405 and wR = 0.1063 for 6870 observed reflections(I 〉 2σ(I)). The Cd(Ⅱ) centre is hepta-coordinated by three N and four O atoms from one bppi terminal ligand and two bdc2– ligands,respectively,displaying a capped trigonal prism geometry. Structure extension gives coordination polymeric chains,in which the bdc2– linkers connect Cd(Ⅱ) cations into a one-dimensional(1D) coordination polymer along the c axis,giving zigzag chains with the Cd···Cd separation of 11.178(1) ?. The adjacent bppi terminal ligands in the chains are anti-periplanar conformation. The three-dimensional(3D) structure is stabilized by π···π stacking and hydrogen-bonding interactions to form a supramolecular self-penetrating network with 1D channels. In 1,there are voids 2999.7 ?~3 with 23.7% of per unit cell volume. Thermal analysis indicates that the framework of 1 is stable until 651 K and the photoluminescence of 1 in the solid shows very weak fluorescence at 382 and 560 nm upon excitation at 310 nm. 展开更多
关键词 1 4-benzenedicarboxylic acid 3-(2 6-di(pyrazin-2-yl)pyridin-4-yl)-1H-indole one-dimensional cadmium(Ⅱ) coordination polymer π···π stacking interactions photoluminescence
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N-丁基-9 H-嘧啶并[4,5-b]吲哚-2-甲酰胺通过NLRP3/Caspase-1抑制巨噬细胞泡沫化及焦亡作用
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作者 舒志云 呼延子旭 +4 位作者 张文晴 谢世顺 成鸿源 徐国兴 李相军 《中国药理学通报》 CAS CSCD 北大核心 2024年第6期1035-1041,共7页
目的设计并合成了嘧啶并吲哚类衍生物N-丁基-9 H-嘧啶并[4,5-b]吲哚-2-甲酰胺(BFPI),探讨其是否通过NLRP3/Caspase-1通路抑制巨噬细胞焦亡和泡沫化作用。方法以2,4,6-三乙氧羰基-1,3,5-三嗪和2-氨基吲哚为起始原料合成BFPI,并通过1H NMR... 目的设计并合成了嘧啶并吲哚类衍生物N-丁基-9 H-嘧啶并[4,5-b]吲哚-2-甲酰胺(BFPI),探讨其是否通过NLRP3/Caspase-1通路抑制巨噬细胞焦亡和泡沫化作用。方法以2,4,6-三乙氧羰基-1,3,5-三嗪和2-氨基吲哚为起始原料合成BFPI,并通过1H NMR、13 C NMR、ESI-MS对其结构进行表征。将体外培养的小鼠单核巨噬细胞株RAW264.7分为空白组、模型组(PA)组和治疗组(BFPI)组,各组细胞用对应培养液处理24 h后,用MTT法检测其增殖活力,油红O染色检测细胞内脂滴形成情况,并用Western blot和RT-qPCR检测NLRP3、Caspase-1和MCP-1 mRNA和蛋白表达水平。结果与空白组比较,模型组细胞增殖活力明显下降,脂滴形成量明显增加,与模型组比较,治疗组细胞增殖活力明显增加,脂滴形成量明显降低,差异均有统计学意义(P<0.01);与空白组比较,模型组细胞NLRP3、Caspase-1和MCP-1的mRNA和蛋白表达水平均明显增加,与模型组比较,治疗组细胞上述指标表达水平均明显下降,差异有统计学意义(P<0.01)。结论BFPI可通过抑制巨噬细胞NLRP3、Caspase-1和MCP-1的表达进而促进其增殖并抑制脂质吞噬能力,有助于延缓动脉粥化时巨噬细胞来源的泡沫细胞形成。 展开更多
关键词 N-丁基-9 H-嘧啶并[4 5-b]吲哚-2-甲酰胺 NLRP3 动脉粥样硬化 巨噬细胞 细胞泡沫化 细胞焦亡
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基于1H-吡唑并[3,4-b]吡啶母核PI3Kδ抑制剂的设计合成
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作者 田宇奇 兰明 +1 位作者 王强 郑永胜 《洛阳理工学院学报(自然科学版)》 2024年第2期1-9,共9页
恶性肿瘤严重危害人类健康与生命,磷脂酰肌醇-3激酶家族(PI3Ks)在细胞增殖、分化过程中起着重要作用,该激酶及其相关通路的其他激酶可被药物干预,是抗癌药物的热门靶点。在以往的PI3K抑制剂中,均有1H-吡唑并[3,4-b]吡啶母核,通过虚拟筛... 恶性肿瘤严重危害人类健康与生命,磷脂酰肌醇-3激酶家族(PI3Ks)在细胞增殖、分化过程中起着重要作用,该激酶及其相关通路的其他激酶可被药物干预,是抗癌药物的热门靶点。在以往的PI3K抑制剂中,均有1H-吡唑并[3,4-b]吡啶母核,通过虚拟筛选以及合成路线设计,合成了一系列1H-吡唑并[3,4-b]吡啶类化合物,该类化合物可能对PI3Kδ具有潜在抑制作用。 展开更多
关键词 PI3K抑制剂 有机合成 1H-吡唑并[3 4-b]吡啶 抗癌药
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An efficient synthesis of 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one catalyzed by recyclable solid superacid SO_4^(2-)/TiO_2 under grinding condition 被引量:2
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作者 Guo Liang Feng 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第9期1057-1061,共5页
An efficient synthesis of symmetrical 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one is achieved via a reaction of acenaphthe-nequinone and indoles catalyzed by solid superacid SO4^2-/TiO2 under solvent-free conditions... An efficient synthesis of symmetrical 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one is achieved via a reaction of acenaphthe-nequinone and indoles catalyzed by solid superacid SO4^2-/TiO2 under solvent-free conditions at room temperature by grinding, which provides an efficient route to the synthesis of symmetrical 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one.This procedure offers several advantages including solvent-free conditions,excellent yields of products,simple work-up as well as reuse of catalysts which makes it a useful and attractive protocol for the synthesis of these compounds. 展开更多
关键词 ACENAPHTHENEQUINONE indole Solid superacid SO4^2-/TiO2 2 2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one
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Synthesis and in vitro-Anti-hepatitis B Virus Activities of Several Ethyl 5-Hydroxy-1H-indole-3-carboxylates 被引量:16
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作者 ZHAO Chun-shen ZHAO Yan-fang CHAI Hui-fang GONG Ping 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2006年第5期577-583,共7页
A series of ethyl 5-hydroxyindole-3-earboxylates 6a-10r was designed and synthesized. The structures of all the compounds were confirmed by IR, ^1H NMR, and MS and their anti-hepatitis B virus (HBV) activities were ... A series of ethyl 5-hydroxyindole-3-earboxylates 6a-10r was designed and synthesized. The structures of all the compounds were confirmed by IR, ^1H NMR, and MS and their anti-hepatitis B virus (HBV) activities were evaluated in 2.2.15 cells. Among them, compound 7g { ethyl 5-hydroxy-2- [ ( 3-methoxyphenylsulfinyl ) methyl ] -1-methyl-4- [ (4-methylpiperazin-1-yl) methyl ]-1H-indole-3-carboxylate} displays a significant anti-HBV activity, which is more potent than the positive control lamivudine. 展开更多
关键词 Ethyl 5-hydroxy-1H-indole-3-carboxylates SYNTHESIS Anti-hepatitis B virus activity
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Design,synthesis and antiproliferative activities of novel 5H-pyridazino[4,5-b]indoles 被引量:1
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作者 Rong Dong Li Xin Zhai +1 位作者 Yan Fang Zhao Ping Gong 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第10期1191-1194,共4页
A novel series of 5H-pyridazino[4,5-b]indoles were designed and synthesized in order to find novel potent anticancer compounds. The structures were confirmed by ^1H NMR and MS. Their antiproliferative activities again... A novel series of 5H-pyridazino[4,5-b]indoles were designed and synthesized in order to find novel potent anticancer compounds. The structures were confirmed by ^1H NMR and MS. Their antiproliferative activities against two cancer cell lines were tested by the MTT method in vitro. Three of compounds (1e, 1g, and 1h) exhibited potent antiproliferative activities, especially compound lh (with IC50 values of 5.2 μmol/L and 1.9 μmol/L against Bel-7402 and HT-1080, respectively). The preliminary structure-activity relationships of 5H-pyridazino[4,5-b]indole derivatives were discussed. 展开更多
关键词 5H-pyridazino[4 5-b]indole derivatives SYNTHESIS Antiproliferative activities
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Novel miR-490-3p/hnRNPA1-b/PKM2 axis mediates the Warburg effect and proliferation of colon cancer cells via the PI3K/AKT pathway
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作者 Xiang-Hui Wan Guo-Bing Jin +8 位作者 Qun Yang Ji-Long Hu Zhi-Liang Liu Jun Rao Can Wen Peng-Ling Li Xi-Mei Yang Bo Huang Xiao-Zhong Wang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第5期2038-2059,共22页
BACKGROUND Heterogeneous ribonucleoprotein A1(hnRNPA1)has been reported to enhance the Warburg effect and promote colon cancer(CC)cell proliferation,but the role and mechanism of the miR-490-3p/hnRNPA1-b/PKM2 axis in ... BACKGROUND Heterogeneous ribonucleoprotein A1(hnRNPA1)has been reported to enhance the Warburg effect and promote colon cancer(CC)cell proliferation,but the role and mechanism of the miR-490-3p/hnRNPA1-b/PKM2 axis in CC have not yet been elucidated.AIM To investigate the role and mechanism of a novel miR-490-3p/hnRNPA1-b/PKM2 axis in enhancing the Warburg effect and promoting CC cell proliferation through the PI3K/AKT pathway.METHODS Paraffin-embedded pathological sections from 220 CC patients were collected and subjected to immunohistochemical analysis to determine the expression of hnRNPA1-b.The relationship between the expression values and the clinicopathological features of the patients was investigated.Differences in mRNA expression were analyzed using quantitative real-time polymerase chain reaction,while differences in protein expression were analyzed using western blot.Cell proliferation was evaluated using the cell counting kit-8 and 5-ethynyl-2’-deoxyuridine assays,and cell cycle and apoptosis were detected using flow cytometric assays.The targeted binding of miR-490-3p to hnRNPA1-b was validated using a dual luciferase reporter assay.The Warburg effect was evaluated by glucose uptake and lactic acid production assays.RESULTS The expression of hnRNPA1-b was significantly increased in CC tissues and cells compared to normal controls(P<0.05).Immunohistochemical results demonstrated significant variations in the expression of the hnRNPA1-b antigen in different stages of CC,including stage I,II-III,and IV.Furthermore,the clinicopathologic characterization revealed a significant correlation between hnRNPA1-b expression and clinical stage as well as T classification.HnRNPA1-b was found to enhance the Warburg effect through the PI3K/AKT pathway,thereby promoting proliferation of HCT116 and SW620 cells.However,the proliferation of HCT116 and SW620 cells was inhibited when miR-490-3p targeted and bound to hnRNPA1-b,effectively blocking the Warburg effect.CONCLUSION These findings suggest that the novel miR-490-3p/hnRNPA1-b/PKM2 axis could provide a new strategy for the diagnosis and treatment of CC. 展开更多
关键词 Heterogeneous ribonucleoprotein A1-b MiR-490-3p Colon cancer Alternative splicing Warburg effect
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基于二萘并[2,3-B∶2′,3′-D]呋喃基团的高效窄发射蓝光OLED器件
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作者 王小伟 袁江波 +4 位作者 马佩兰 闫自强 崔志远 孙军 彭其明 《发光学报》 EI CAS CSCD 北大核心 2024年第9期1503-1510,共8页
高效率窄光谱蓝色有机电致发光器件(OLED)是柔性显示领域的研究重点之一。本文以二萘并[2,3-B∶2′,3′-D]呋喃为弱电子受体、N-(4-联苯基)-1-萘胺作为电子给体设计合成了一种D-A-D型蓝光分子DPF-NA,其在正己烷溶液中的发射峰位于441 n... 高效率窄光谱蓝色有机电致发光器件(OLED)是柔性显示领域的研究重点之一。本文以二萘并[2,3-B∶2′,3′-D]呋喃为弱电子受体、N-(4-联苯基)-1-萘胺作为电子给体设计合成了一种D-A-D型蓝光分子DPF-NA,其在正己烷溶液中的发射峰位于441 nm。理论计算与光物理测试结果显示DPF-NA具有杂化局域电荷转移激发态(HLCT)特性,兼具局域态(LE)高发光效率与电荷转移态(CT)高激子利用率特征,在二氯甲烷溶液中的光致发光量子效率(PLQY)为81.2%。基于质量分数3%DPF-NA掺杂浓度的OLED器件电致发光(EL)峰位于455 nm,半峰宽(FWHM)仅为26 nm,CIE(x,y)坐标为(0.14,0.08),最大外量子效率(EQEmax)为6.76%。 展开更多
关键词 有机电致发光器件 二萘并[2 3-b∶2′ 3′-D]呋喃 蓝光 激子利用 外量子效率
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Theoretical Studies on the Aminolysis of Ester: Effects of the Catalysis and Substituent to the Reaction of Methyl Indole-3-acetate with Ammonia 被引量:1
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作者 ZHANG Liang CHEN Rong LIANG Guo-Ming 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第6期855-866,共12页
A comprehensive exploration of the aminolysis mechanism for methyl indole-3-acetate with ammonia is carried out by employing the B3 LYP/6-311++G(d,p), M06-2 X/6-311++G(d,p) and MP2/6-311++G(d,p)//M06-2 X/6-311++G(d,p)... A comprehensive exploration of the aminolysis mechanism for methyl indole-3-acetate with ammonia is carried out by employing the B3 LYP/6-311++G(d,p), M06-2 X/6-311++G(d,p) and MP2/6-311++G(d,p)//M06-2 X/6-311++G(d,p) levels. Two alterative reaction channels of the concerted and addition/elimination stepwise processes including the uncatalyzed, base-catalyzed reactions are taken into consideration. Subsequently, the substituent effects and solvent effects in methanol are also evaluated at the M06-2 X/6-311++G(d,p) level. The calculated results indicate that the calculated values of M06-2 X level are quite close to those of MP2, the stepwise pathway has more advantages to the concerted one for all of the reaction processes and the catalyst facilitates the proton migration and decreases the energy barriers as well. It is shown that the most preferred mechanism is the based-catalyzed stepwise process, the substituent of NH2 group slightly accelerates all the aminolysis reaction processes, and the solvent effect does not remarkably change the mechanism of the reaction. 展开更多
关键词 AMINOLYSIS METHYL indole-3-acetate mechanism catalytic EFFECT SUBSTITUENT EFFECT
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n(Bi_(2)O_(3))/n(SiO_(2))对Bi_(2)O_(3)-B2O_(3)-SiO_(2)系光伏玻璃背板油墨微观结构和反射率的影响
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作者 汪伟 赵田贵 +4 位作者 孟子豪 刘溧 董伟霞 徐和良 包启富 《硅酸盐通报》 CAS 北大核心 2024年第2期702-709,共8页
随着光伏发射极和背面钝化电池双面双玻组件产业的兴起,光伏玻璃背板用光伏油墨的需求量逐年递增。光伏油墨制备成涂层后,其致密程度将直接影响自身的反射率,进而对光伏电池的光电转化效率产生影响。本文通过改变n(Bi_(2)O_(3))/n(SiO_(... 随着光伏发射极和背面钝化电池双面双玻组件产业的兴起,光伏玻璃背板用光伏油墨的需求量逐年递增。光伏油墨制备成涂层后,其致密程度将直接影响自身的反射率,进而对光伏电池的光电转化效率产生影响。本文通过改变n(Bi_(2)O_(3))/n(SiO_(2)),探究玻璃熔剂析晶和其对Bi_(2)O_(3)-B_(2)O_(3)-SiO_(2)系玻璃熔剂所制备光伏油墨的影响。采用DSC和Raman对玻璃熔剂的特征行为进行了表征,采用XRD、SEM、色度仪对不同光伏油墨涂层的微观结构和反射率进行了研究,并提出了光伏油墨涂层的光反射增强机制。研究表明,n(Bi_(2)O_(3))/n(SiO_(2))的升高会使[BiO_(3)]和[BiO_(6)]基团含量增多,破坏[SiO_(4)]玻璃网络的能力增强,玻璃熔剂的转变温度和析晶峰温度逐渐降低,玻璃熔剂的析晶能力逐渐增大。在短时间内烤制后的玻璃熔剂涂层中会逐渐析出大量的片状Bi_(2)SiO_(5)晶粒,将其制备成光伏油墨涂层后,涂层的反射率会随着n(Bi_(2)O_(3))/n(SiO_(2))的升高而逐渐升高。当n(Bi_(2)O_(3))/n(SiO_(2))为30∶60时,光伏油墨涂层的反射率在近红外波长范围内可提升到82.66%。这主要是因为油墨涂层中的孔隙和空洞作为异相界面,可促使Bi_(2)SiO_(5)晶粒析出并填充在光伏油墨涂层的孔隙和空洞中,使油墨涂层的致密度提高,从而增强光伏油墨涂层对光线的反射能力。 展开更多
关键词 Bi_(2)O_(3)-b2O_(3)-SiO_(2)系光伏玻璃背板油墨 反射率 n(Bi_(2)O_(3))/n(SiO_(2)) 微观结构 析晶
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Rooting of Stem Cuttings with Different Indole 3 Butyric Acid (IBA) Treatments and Development of Micropropagation Protocol for <i>Piper betle</i>L. Node Culture 被引量:1
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作者 Qusay Abdulhamza Muttaleb Thohirah Lee Abdullah +1 位作者 Azmi Abdul Rashid Siti Aishah Hassan 《American Journal of Plant Sciences》 2017年第12期3084-3100,共17页
The present study, conducted during 2016 and 2017 seasons, aimed to investigate the effect of IBA on rooting of Piper betle L. stem cuttings (softwood and semi-hardwood). The experiment was undertaken in misting house... The present study, conducted during 2016 and 2017 seasons, aimed to investigate the effect of IBA on rooting of Piper betle L. stem cuttings (softwood and semi-hardwood). The experiment was undertaken in misting house field 2 UPM using the sand media to determine the adventitious roots initiation and development using the histological method. The cuttings were treated with different IBA concentrations (0, 500, 1000, 1500 and 2000 mg/L). The nodes explants were used in the development of a protocol for in vitro propagation of P. betle L., with different concentrations of Clorox with different times of immersion (20% Clorox 10 minutes, 30% Clorox 10 minutes, 20% Clorox 20 minutes, and 30% 20 minutes). In multiplication of the plantlets, Murashige and Skoog (MS) medium with different concentrations of BAP (0, 0.5, 1.0, 2.0 mg/L) were used to investigate the rooting of the explants. The results indicated that the types of the cuttings were different in the rooting capacity and the length of the roots. Moreover, it was found that in comparison with the control treatment, by a rise in the concentrations of the IBA, there was a significant upsurge in the rooting percentage, the root diameter, and the number of the roots. The results indicated that the types of cutting with 1000, 1500 and 2000 mg/L IBA perform better in the root percentage (100%) in the semi hardwood cuttings. The best results, however, were 2000 mg/L IBA in the semi hardwood cuttings, with the number of the roots to be 35.05, and the fresh weight of the roots to be 3.94 g, the dry weight of the roots to be 0.33 g, the length of the roots to be 391.88 cm, the roots diameter to be 1.21 mm, the surface area of the roots to be 121.83 cm2, and the root volume to be 2.99 cm3. Nonetheless, the optimal concentration of Clorox with the time immersion was 20% with the 20-minute immersion time, which produced a shoot induction percentage of 30% dead explants and a mean number of 70.00 shoots per explant and the optimal concentration of benzylaminopurine (BAP) at 1.0 mg/L. It is of note that a shoot induction percentage of 22.29% and a mean number of 4.1% number of auxiliary bud per treatment. P. betle shoots in MS medium without PGR MS (0.0) yielded a good rooting. 展开更多
关键词 PIPER betle ROOTING Stem Cutting indole-3-butyric Acid MICROPROPAGATION
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Synthesis and Crystal Structure of 3-(1-Ethyl-1H-indole-3-carbonyl)aminopropionic Acid
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作者 黄岗 徐兴烟 +1 位作者 曾向潮 李凯平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第9期1343-1346,共4页
3-(1-Ethyl-1H-indole-3-carbonyl)aminopropionic acid has been synthesized by alkylation of 3-(1H-indole-3-carbonyl)aminopropionic acid methyl ester with bromoethane,follo-wed by saponifying and acidating,in 89.0% y... 3-(1-Ethyl-1H-indole-3-carbonyl)aminopropionic acid has been synthesized by alkylation of 3-(1H-indole-3-carbonyl)aminopropionic acid methyl ester with bromoethane,follo-wed by saponifying and acidating,in 89.0% yield.Its crystal structure was gotten and determined by X-ray diffraction method.The crystal is of orthorhombic,space group P212121 with a = 8.9490(12),b = 11.1010(15),c = 13.0475(18) ,V = 1296.2(3) 3,Z = 4,Dc = 1.334 g/cm3,λ = 0.71073 ,μ(MoKα) = 0.095 mm-1,Mr = 260.29 and F(000) = 552.The structure was refined to R = 0.0306 and wR = 0.1445 for 2612 observed reflections with I 2σ(I).In the crystal structure,molecules are linked to each other through hydrogen bonds of N(2)-H(2)···O(1) and O(3)-H(3)···O(1),generating a three-dimensional network. 展开更多
关键词 3-(1-ethyl-1H-indole-3-carbonyl)aminopropionic acid indole synthesis crystal structure
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Reactivity of 3-Cyanoacetylindole Derivatives: Synthesisof 3-Hydrazonopyrazolyl and 3-Thiadiazolyl Indole Derivatives
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作者 Hamdi M. Hassaneen Huwaida M. E. Hassaneen Zakaria Ahmed Gomaa 《International Journal of Organic Chemistry》 2011年第3期97-104,共8页
The coupling reaction of 3-cyanoacetyl-2-methylindole 1a with the aromatic diazonium salts gave the corresponding arylhydrazones 2a-e. Compounds 2 were used for synthesis of 4-aminopyrazole-5-carbonitrile 4a-e and 5-a... The coupling reaction of 3-cyanoacetyl-2-methylindole 1a with the aromatic diazonium salts gave the corresponding arylhydrazones 2a-e. Compounds 2 were used for synthesis of 4-aminopyrazole-5-carbonitrile 4a-e and 5-amino-4-arylazo-3-pyrazoles 5a-e derivatives. Also, treatment of 3-cyanoacetyl-2-phenylindole 1b with phenyl isothiocyanate gave the corresponding thioacetanilide 7. The later compound 7 was utilized as the key intermediate for the synthesis of some new thiadiazole derivatives 9a-r. The structures of all new compounds were elucidated on the basis of elemental analysis and spectral data. 展开更多
关键词 3-Methyl indole 3-Phenyl indole PHENYL ISOTHIOCYANATE Cyanoacetic Acid
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TsOH·H<sub>2</sub>O-Catalyzed Friedel-Crafts of Indoles of 3-Hydroxyisobenzofuran-1(3<i>H</i>)-One with Indoles: Highly Synthesis of 3-Indolyl-Substituted Phthalides
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作者 Hongying Tang Xinyu Zhang +1 位作者 Airu Song Zhongbiao Zhang 《Modern Research in Catalysis》 2012年第2期11-14,共4页
An efficient and facile method for the synthesis of 3-indolyl-substituted phthalides by Friedel-Crafts alkylation of indoles with 3-hydroxyisobenzofuran-1(3H)-one has been developed. Using only 2 mol-% TsOH·H2O a... An efficient and facile method for the synthesis of 3-indolyl-substituted phthalides by Friedel-Crafts alkylation of indoles with 3-hydroxyisobenzofuran-1(3H)-one has been developed. Using only 2 mol-% TsOH·H2O as the catalyst, various substituted indoles can react smoothly at room temperature to give the corresponding phthalides products in good to excellent yields (up to 96%). 展开更多
关键词 Synthesis 3-indolyl-Substituted PHTHALIDES FRIEDEL-CRAFTS Alkylation 3-Hydroxyisobenzofuran-1(3H)-One indole
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