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1.
A Simple 3,4‐Ethylenedioxythiophene Based Hole‐Transporting Material for Perovskite Solar Cells 下载免费PDF全文
Dr. Hairong Li Kunwu Fu Prof. Anders Hagfeldt Prof. Michael Grätzel Prof. Subodh G. Mhaisalkar Prof. Andrew C. Grimsdale 《Angewandte Chemie (International ed. in English)》2014,53(16):4085-4088
We report a novel electron‐rich molecule based on 3,4‐ethylenedioxythiophene (H101). When used as the hole‐transporting layer in a perovskite‐based solar cell, the power‐conversion efficiency reached 13.8 % under AM 1.5G solar simulation. This result is comparable with that obtained using the well‐known hole transporting material 2,2′,7,7′‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,9′‐spirobifluorene (spiro‐OMeTAD). This is the first heterocycle‐containing material achieving >10 % efficiency in such devices, and has great potential to replace the expensive spiro‐OMeTAD given its much simpler and cheaper synthesis. 相似文献
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Cheng Gu He Liu Dehua Hu Wensi Zhang Ying Lv Ping Lu Dan Lu Yuguang Ma 《Macromolecular rapid communications》2011,32(13):1014-1019
This contribution presents a kind of novel and neutral network films based on EDOT formed by in situ electrocopolymerization (ECP). The ECP films which are neutral and colorless exhibit the conductivity of 0.2–0.5 S · cm−1, WF of 4.79–5.20 eV, and RMS roughness of 3.51–5.26 nm. The electroluminescent devices where ECP films acted as hole‐transport layer (HTL) exhibit higher brightness, current density, efficiency (20–30% improvement), and stability than that of PEDOT:PSS HTL device. The ECP films also significantly benefit the stability of neighboring organic layer compared to PEDOT:PSS. This kind of new ECP films affords more opportunities to develop organic light‐emitting diodes (OLEDs) with high performances and stability.
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The redox mediator Meldola blue (MB) was entrapped into two polymers, poly‐1,2‐diaminobenzene (p‐DAB) and poly‐3,4‐ethylenedioxythiophene (p‐EDOT) by potential cycling and films were applied to NADH oxidation with subsequent glutamate detection using immobilized glutamate dehydrogenase. Both polymer films were tested for electrocatalysis of NADH using amperometry at Eapp=0.1 V vs. Ag/AgCl and similar response characteristics were obtained with sensitivity values of 6.1 nA μM?1, linear range up to 0.5 mM (R2=0.9972) and LOD of 50 μM. Subsequent amperometric determination of glutamate resulted in sensitivity 0.7 nA μM?1, linearity 0–100 μM and detection limit of 2 μM glutamate. 相似文献
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羟甲基或碘甲基取代的3,4-亚乙基二氧噻吩(EDOT)衍生物与含氰乙基或羧酸基的四硫代富瓦烯(TTF)衍生物通过酯化或醚化反应可生成EDOT-TTF类型的化合物.在此过程中发现,由3,4-二羟基噻吩-2,5-二羧酸甲酯(1)与环氧溴丙烷经醚化反应生成的关环产物是一个由3,4-二氧-羟甲基乙基噻吩-2,5-二羧酸甲酯(2)与3,4-二氧-2’-羟基亚丙基噻吩-2,5-二羧酸甲酯(2’)组成的混合物,两者很难用常规手段分离.由(2+2’)衍生的2,5-二羧酸甲酯-3,4-二氧-碘代甲基亚乙基噻吩(3)和3,4-二氧-碘代亚丙基噻吩-2,5-二羧酸甲酯(3’)以及3,4-二氧-羟甲基亚乙基噻吩(4)与3,4-二氧-2’-羟基亚丙基噻吩(4’)与2-氰乙基硫-3-甲基硫-6,7-二(正己基硫)-四硫代富瓦烯(TTF-1)或2-羧甲基硫-3-甲基硫-6,7-二(正己基硫)-四硫代富瓦烯(TTF-3)进行醚化或酯化反应表现出了高度的选择性,只有3能与TTF-1反应生成结构单一的EDOT-TTF 1.同样只有4能与TTF-3反应生成结构单一的EDOT-TTF 2. 相似文献
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Adriana F. Ibaez 《Journal of heterocyclic chemistry》2005,42(1):109-111
In an attempt to ascertain the scope of using ethyl polyphosphate in the Bischler‐Napieralsky annelation reaction, a title compound was synthesized and reduced to the respective 1‐(3,4‐dimethoxyphenylmethyl)‐3‐phenyl‐6,7,8‐trimethoxy‐1,2,3,4‐tetrahydroisoquinoline. 相似文献
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A 3,4‐trans‐Fused Cyclic Protecting Group Facilitates α‐Selective Catalytic Synthesis of 2‐Deoxyglycosides 下载免费PDF全文
Dr. Edward I. Balmond Dr. David Benito‐Alifonso Dr. Diane M. Coe Prof. Roger W. Alder Dr. Eoghan M. McGarrigle Dr. M. Carmen Galan 《Angewandte Chemie (International ed. in English)》2014,53(31):8190-8194
A practical approach has been developed to convert glucals and rhamnals into disaccharides or glycoconjugates with high α‐selectivity and yields (77–97 %) using a trans‐fused cyclic 3,4‐O‐disiloxane protecting group and TsOH?H2O (1 mol %) as a catalyst. Control of the anomeric selectivity arises from conformational locking of the intermediate oxacarbenium cation. Glucals outperform rhamnals because the C6 side‐chain conformation augments the selectivity. 相似文献
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Selective Synthesis of New Tetracyclic Coumarin‐fused Pyrazolo[3,4‐b]pyridines and Pyrazolo[3,4‐b]pyridin‐6(7H)‐ones 下载免费PDF全文
A three‐component reaction for the synthesis of new coumarin‐fused tetracyclic system from 4‐hydroxycoumarin, aldehydes, and 5‐aminopyrazoles/5‐aminoisoxazole is described. In the presence of acetic acid, 4,7‐dihydro‐1H‐pyrazolo[3,4‐b]pyridines ( 4 ) and pyrazolo[3,4‐b]pyridines ( 5 ) were obtained in acetonitrile and dimethylsulfoxide medium, respectively. The reaction gave rise to 4,5‐dihydro‐1H‐pyrazolo[3,4‐b]pyridin‐6(7H)‐ones ( 6 ) in acetic acid–ethanol combination system, which involved the C–O bond cleavage. 4‐Hydroxy‐6‐methyl‐2H‐pyran‐2‐one and acenaphthylene‐1,2‐dione were also examined, affording the corresponding C–O bond cleavage products. Mechanism indicates that the reaction is reversible in acetic acid–ethanol combination system. 相似文献
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A Novel L‐Cysteine Electrochemical Sensor Using Sulfonated Graphene‐poly(3,4‐Ethylenedioxythiophene) Composite Film Decorated with Gold Nanoparticles 下载免费PDF全文
Xiaoqiang Wang Yangping Wen Limin Lu Jingkun Xu Long Zhang Yuanyuan Yao Haohua He 《Electroanalysis》2014,26(3):648-655
By exploiting the electrostatic interaction between positively charged 3,4‐ethylenedioxythiophene cation radicals and negatively charged sulfonated graphene (SG) sheets, we prepared a poly(3,4‐ethylenedioxythiophene)‐sulfonated graphene (SG‐PEDOT) composite film by a one‐step electrochemical process. The composite was further decorated with gold nanoparticles (AuNPs) and employed as an electrode material for the detection of L ‐cysteine (Cys). The SG‐PEDOT composite film is shown to provide a rough surface for the electrodeposition of AuNPs and to improve substrate accessibility and interaction with Cys. Moreover, the AuNPs‐decorated composite exhibits better electrocatalytic performance than that of a SG‐PEDOT composite only. Under optimum experimental conditions, the amperometric current of the sensor is linearly related to the concentration of Cys in the 0.1 to 382 µM range, and the detection limit is 0.02 µM (at S/N=3). The modified electrode displays favorable selectivity, good stability and high reproducibility. The method was successfully applied to the detection of Cys in spiked human urine. 相似文献
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The novel 1,2‐diaryl substituted pyrrolo[3,4‐b]pyridine‐5,7‐diones were selectively synthesized in high yields by the base catalyzed cyclization reaction of 3‐arylamino‐1‐methyl‐1H‐pyrrole‐2,5‐diones with cinnamaldehyde and its derivatives in acetonitrile at room temperature. However, when piperidinium trifluoroacetate was employed as catalyst, the reaction afforded a mixture of 1,2‐diaryl and 1,4‐diaryl substituted pyrrolo[3,4‐b]pyridine‐5,7‐diones in comparable yields. 相似文献
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We synthesized novel aromatic epoxy, 4,4′‐bis(4‐oxyphenoxy)benzophenone diglycidyl ether (DGEEK), by a three step reaction sequence and then it was blended with 3,4‐epoxycyclohexylmethyl 3,4‐epoxycyclohexanecarboxylate (CAE). The DGEEK structure was confirmed by FT‐IR and 1H‐NMR measurement. Also, we investigated thermal properties of DGEEK/CAE blend epoxy by differential scanning calorimeter (DSC) and thermogravimetry analyzer (TGA). The glass transition temperature increased but initial decomposition temperature of cured epoxy decreased through the increasing amounts of ether–ether–ketone group of the epoxy network structure. By increasing the DGEEK mole fraction in the DGEEK/CAE blend epoxy matrix, the curing peak temperature decreased and the curing activation energy for DGEEK/CAE blend epoxy systems showed a considerable decrease. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
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Synthesis of Polysubstituted Pyrazolo[3,4‐b]pyridine‐3‐Carbohydrazide and Pyrazolo[3,4‐d]pyridazine Derivatives 下载免费PDF全文
Dinesh C. Bhavsar Prashant S. Nikam Sachin A. Gangurde Raghunath B. Toche 《Journal of heterocyclic chemistry》2014,51(3):635-641
5‐Amino‐4‐formyl pyrazole carboxylate gave facile reactions with malononitrile, hydrazine, and ketones in the presence of piperidine furnished substituted pyrazolo[3,4‐b]pyridines and pyrazolo[3,4‐b]quinolones. The pyridazine sulfonamides were obtained by the reaction of 5‐chloro 4‐formyl pyrazole carboxylate with sulfonamide derivatives. 相似文献
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Abbas Shafiee Mohammad Z. Kassaee Ahamad R. Bekhradnia 《Journal of heterocyclic chemistry》2007,44(2):471-474
The synthesis of a series of novel 3,4‐diaryl‐1H‐pyrroles and related arylalkenes from p‐bromo thiophenol, tosylmethyl isocyanide and commercially available materials is reported. Arylalkenes having electron‐withdrawing substituents gave higher yield of 3,4‐diaryl‐1H‐pyrroles. 相似文献
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H. D. Hollis Showalter Anthony D. Sercel Michael A. Stier William R. Turner 《Journal of heterocyclic chemistry》2001,38(4):961-964
Approaches toward the preparative‐scale synthesis of target 3,4‐dihydro‐1(2H)‐isoquinolinones 1–3 are presented. Compounds 1 and 2 were prepared via a Schmidt rearrangement on easily obtained indanone precursors, but in low overall yield. A better method to make this class of compounds is exemplified by the large‐scale synthesis of 2 via a Curtius rearrangement sequence. Thus, high‐temperature thermal cyclization of an in situ formed styryl isocyanate from precursor 8 in the presence of tributylamine gave the corresponding 1(2H)‐isoquinolinone ( 9 ). Catalytic hydrogenation of 9 provided the desired 3,4‐dihydro‐5‐methyl‐1(2H)‐isoquinolinone ( 2 ) in 65 % overall yield. Similar reduction of a commercially available 5‐hydroxy‐1(2H)‐isoquinolinone precursor 10 followed by an O ‐alkylation/amination sequence gave target 3 in good overall yield. The route proceeding via the Curtius rearrangement is recommended for large scale synthesis of other 3,4‐dihydro‐1(2H)‐isoquinolinones. Only when deactivating substituents or sensitive functionality within the benzenoid ring render the high temperature ring closure of the intermediate isocyanate inefficient might a Schmidt rearrangement protocol be the method of choice. 相似文献
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Elena S. Komarova Vadim A. Makarov Vladimir G. Granik Cyril Párkányi 《Journal of heterocyclic chemistry》2012,49(5):969-998
The procedures for the synthesis of substituted pyrazolo[3,4‐b]pyridine‐6‐ones and some of their properties are reviewed. 相似文献
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Anton V. Dolzhenko Shiqi Bai Anna V. Dolzhenko Wai Keung Chui 《Journal of heterocyclic chemistry》2012,49(4):763-767
A new convenient synthon for heterocyclic chemistry, namely 1H‐pyrazolo[3,4‐b]pyridin‐3‐ylguanidine was successfully prepared by selective guanylation of 1H‐pyrazolo[3,4‐b]pyridin‐3‐amine. A series of 3,4‐dihydropyrido[2′,3′:3,4]pyrazolo[1,5‐a][1,3,5]triazin‐2‐amines was synthesized from 1H‐pyrazolo[3,4‐b]pyridin‐3‐ylguanidine using aldehydes or ketones as one‐carbon inserting reagents. The tautomeric preferences of the products were determined using spectroscopic (e.g., 2D NOESY NMR) and single crystal X‐ray diffraction data. 相似文献