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1.
本文以纳米多孔的TiO2膜为基底,通过恒电流阳极聚合的方法制备聚(3-溴噻吩) (PBrT)膜,并研究负载在纳米TiO2膜上PBrT的电致变色性能。采用原子力显微镜(AFM)对纳米TiO2膜的形貌进行表征。利用紫外吸收光谱、计时安培法、计时吸收法研究PBrT膜的电致变色性能。结果显示,沉积在纳米多孔TiO2膜上的PBrT具有更优越的电致变色性能。PBrT膜氧化态时为亮红色,还原态时为深蓝色,颜色的对比度为22%,库仑效率为70%,着色效率为191.3 cm2 C-1(还原态),88.9 cm2 C-1(氧化态),该聚合膜具有良好的记忆效应。PBrT/TiO2优异的电致变色性能使其成为良好的电致变色材料,在电致变色器件方面具有潜在的应用价值。 相似文献
2.
Andrei Y. Bochkov Mikhail M. Krayushkin Vladimir N. Yarovenko Valery A. Barachevsky Irina P. Beletskaya Valery F. Traven 《Journal of heterocyclic chemistry》2013,50(4):891-898
Novel unsymmetrical di(thienyl)maleic acid anhydride, including coumarin moiety, has been designed and synthesized. Its photochromism study and fatigue resistance estimation are reported. Microwave‐assisted procedure has been successfully used for synthesis of 3‐(5‐methylthiophen‐2‐yl)coumarins. 相似文献
3.
Synthesis and Biological Activity of 1‐(Substituted phenoxyacetoxy)‐1‐(pyridin‐2‐yl or thien‐2‐yl)methylphosphonates
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A series of novel O,O‐dimethyl 1‐(substituted phenoxyacetoxy)‐1‐(pyridin‐2‐yl or thien‐2‐yl)methylphosphonates 6a , 6b , 6c , 6d , 6e , 6f , 6g , 6h , 6i , 6j , 6k , 6l , 6m , 6n and 7a , 7b , 7c , 7d were synthesized. Their structures were confirmed by IR, 1H NMR, mass spectroscopy, and elemental analyses. The results of preliminary bioassays show that some of the title compounds exhibit moderate to good herbicidal and fungicidal activities. For example, the title compounds 6a , 6c , 6l , 6m , and 7d possess 90–100% inhibition against most of the tested plants at the dosage of 1500 g ai/ha, whereas the title compounds 6b , 6g , 6h and 6n possess 92–100% inhibition against Fusarium oxysporum, Phyricularia grisea, Botrytis cinereapers, Gibberella zeae, Sclerotinia sclerotiorum, and Cercospora beticola at the concentration of 50 mg/L. 相似文献
4.
Janine Wolf Camino M. González Tanarro Michael Gütschow Joachim Sieler Bärbel Schulze 《Helvetica chimica acta》2008,91(1):35-45
The synthesis of novel triaryl‐substituted 4‐(isothiazol‐3‐yl)morpholines 7 and 8 , and 1‐(isothiazol‐3‐yl)piperazines 9 – 13 by reaction of the corresponding isothiazolium salts 5 and 6 with secondary amines in the presence of t‐BuOK in absolute THF is described. Some representatives of the isothiazoles were evaluated as inhibitors of acetylcholinesterase from Electrophorus electricus. 相似文献
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6.
Youquan Zhu Pei Liu Danyang Wang Jin Zhang Jie Cheng Yuan Ma Xiaomao Zou Huazheng Yang 《中国化学》2013,31(2):173-181
A series of novel N‐(4‐(2‐aryloxythiazol‐5‐yl)but‐3‐yn‐2‐yl)benzamide derivatives were designed and synthesized. Their structures were identified by 1H NMR and elemental analyses. Preliminary bioassays indicated that some title compounds provided >80% control of Sclerotinia sclerotiorum at 50 µg/mL and >70% herbicidal activities against B. campestris at 100 µg/mL. Their structure‐activities relationships were also discussed. 相似文献
7.
Ratnadeep S. Joshi Priyanka G. Mandhane Wajid Khan Charansingh H. Gill 《Journal of heterocyclic chemistry》2011,48(4):872-876
A new series of 2‐(p‐tolyloxy)‐3‐(5‐(pyridin‐4‐yl)‐1,3,4‐oxadiazol‐2‐yl)quinoline were synthesized from oxidative cyclization of N′‐((2‐(p‐tolyloxy)quinoline‐3‐yl)methylene)isonicotinohydrazide in DMSO/I2 at reflux condition for 3–4 h. The structures of the new compounds were confirmed by elemental analyses as well as IR, 1H‐NMR, and mass spectral data. All the synthesized compounds were screened for their antibacterial activities against various bacterial strains. Several of these compounds showed potential antibacterial activity. J. Heterocyclic Chem., (2011). 相似文献
8.
Diana T. Patoilo Artur M. S. Silva Diana C. G. A. Pinto Augusto C. Tomé José A. S. Cavaleiro 《Journal of heterocyclic chemistry》2007,44(6):1345-1350
9.
M. A. Del Valle E. T. Silva F. R. Diaz M. E. Bodini L. Gargallo 《Journal of polymer science. Part A, Polymer chemistry》2000,38(9):1698-1703
The optima conditions to electrosynthesize poly(2,3‐diaminophenol) by electro‐oxidation of the monomer were determined, and the electrodeposits obtained characterized by electrochemical methods, UV‐vis, FTIR, conductivity and viscosity measurements. The influence of parameters such as electrolytical medium and electrochemical conditions on the electro‐oxidation of 2,3‐diaminophenol were also investigated. It has been established that appropriate deposits are obtained only when very anhydrous acetonitrile is used as solvent. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 1698–1703, 2000 相似文献
10.
Hui‐Min Wang Sheng‐Huei Hsiao 《Journal of polymer science. Part A, Polymer chemistry》2014,52(8):1172-1184
Three series of aromatic polyimides with 4‐(carbazol‐9‐yl)triphenylamine moieties were prepared from the polycondensation reactions of 4,4′‐diamino‐4″‐(carbazol‐9‐yl) triphenylamine (1), 4,4′‐diamino‐4″‐(3,6‐di‐tert‐butylcarbazol‐9‐yl)triphenylamine (t‐Bu‐1), and 4,4′‐diamino‐4″‐(3,6‐dimethoxycarbazol‐9‐yl)triphenylamine (MeO‐1), respectively, with various commercially available tetracarboxylic dianhydrides. In addition to high thermal stability and good film‐forming ability, the resulting polyimides exhibited an ambipolar electrochromic behavior. The polyimides based on t‐Bu‐1 and MeO‐1 revealed higher redox‐stability and enhanced electrochromic performance than the corresponding ones based on 1 because the active sites of their carbazole units are blocked with bulky t‐butyl or electron‐donating methoxy groups. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52, 1172–1184 相似文献
11.
《Acta Crystallographica. Section C, Structural Chemistry》2017,73(4):357-361
PhotoCORMs (photo‐active CO‐releasing molecules) have emerged as a class of CO donors where the CO release process can be triggered upon illumination with light of appropriate wavelength. We have recently reported an Mn‐based photoCORM, namely [MnBr(pbt)(CO)3] [pbt is 2‐(pyridin‐2‐yl)‐1,3‐benzothiazole], where the CO release event can be tracked within cellular milieu by virtue of the emergence of strong blue fluorescence. In pursuit of developing more such trackable photoCORMs, we report herein the syntheses and structural characterization of two MnI–carbonyl complexes, namely fac‐tricarbonylchlorido[2‐(pyridin‐2‐yl)‐1,3‐benzothiazole‐κ2N ,N ′]manganese(I), [MnCl(C12H8N2S)(CO)3], (1), and fac‐tricarbonylchlorido[2‐(quinolin‐2‐yl)‐1,3‐benzothiazole‐κ2N ,N ′]manganese(I), [MnCl(C16H10N2S)(CO)3], (2). In both complexes, the MnI center resides in a distorted octahedral coordination environment. Weak intermolecular C—H…Cl contacts in complex (1) and Cl…S contacts in complex (2) consolidate their extended structures. These complexes also exhibit CO release upon exposure to low‐power broadband visible light. The apparent CO release rates for the two complexes have been measured to compare their CO donating capacity. The fluorogenic 2‐(pyridin‐2‐yl)‐1,3‐benzothiazole and 2‐(quinolin‐2‐yl)‐1,3‐benzothiazole ligands provide a convenient way to track the CO release event through the `turn‐ON' fluorescence which results upon de‐ligation of the ligands from their respective metal centers following CO photorelease. 相似文献
12.
Ho Sik Kim Sam Tag Kwag Kyung Ok Choi Yoshihisa Okamoto Shinnosuke Kajiwara Noriko Fujiwara Yoshihisa Kurasawa 《Journal of heterocyclic chemistry》2000,37(1):103-107
The reaction of 6‐chloro‐2‐hydrazinoquinoxaline 4‐oxide 1b with acetylacetone or benzoylacetone gave 6‐chloro‐2‐(3,5‐dimethylpyrazol‐i‐yl)quinoxaline 4‐oxide 5a or 6‐chloro‐2‐(3‐methyl‐5‐phenylpyrazol‐1‐yl)quinoxaline 4‐oxide 5b , respXectively. Compound 5a or 5b was converted into the pyrrolo[1,5‐a]quinoxaline 6a or 6b , triazolo[4,3‐a]quinoxaline 9a or 9b , and tetrazolo[1,5‐a]quinoxaline 10. 相似文献
13.
《Acta Crystallographica. Section C, Structural Chemistry》2017,73(11):923-929
Carbon monoxide (CO) has recently been identified as a gaseous signaling molecule that exerts various salutary effects in mammalian pathophysiology. Photoactive metal carbonyl complexes (photoCORMs) are ideal exogenous candidates for more controllable and site‐specific CO delivery compared to gaseous CO. Along this line, our group has been engaged for the past few years in developing group‐7‐based photoCORMs towards the efficient eradication of various malignant cells. Moreover, several such complexes can be tracked within cancerous cells by virtue of their luminescence. The inherent luminecscent nature of some photoCORMs and the change in emission wavelength upon CO release also provide a covenient means to track the entry of the prodrug and, in some cases, both the entry and CO release from the prodrug. In continuation of the research circumscribing the development of trackable photoCORMs and also to graft such molecules covalently to conventional delivery vehicles, we report herein the synthesis and structures of three rhenium carbonyl complexes, namely, fac‐tricarbonyl[2‐(pyridin‐2‐yl)‐1,3‐benzothiazole‐κ2N ,N ′](4‐vinylpyridine‐κN )rhenium(I) trifluoromethanesulfonate, [Re(C7H7N)(C12H8N2S)(CO)3](CF3SO3), ( 1 ), fac‐tricarbonyl[2‐(quinolin‐2‐yl)‐1,3‐benzothiazole‐κ2N ,N ′](4‐vinylpyridine‐κN )rhenium(I) trifluoromethanesulfonate, [Re(C7H7N)(C16H10N2S)(CO)3](CF3SO3), ( 2 ), and fac‐tricarbonyl[1,10‐phenanthroline‐κ2N ,N ′](4‐vinylpyridine‐κN )rhenium(I) trifluoromethanesulfonate, [Re(C7H7N)(C12H8N2)(CO)3](CF3SO3), ( 3 ). In all three complexes, the ReI center resides in a distorted octahedral coordination environment. These complexes exhibit CO release upon exposure to low‐power UV light. The apparent CO release rates of the complexes have been measured to assess their comparative CO‐donating capacity. The three complexes are highly luminescent and this in turn provides a convenient way to track the entry of the prodrug molecules within biological targets. 相似文献
14.
Abhijit Mitra Pamela J. Seaton Kraig A. Wheeler 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):o581-o582
The title new diquinaldine derivative, C27H24N4, forms molecular assemblies organized by intermolecular quinoline π–π stacking [3.356 (3) and 3.440 (3) Å] and both inter‐ and intramolecular N—H⋯N hydrogen bonds [3.039 (3)–3.104 (3) Å and 129 (2)–172 (2)°]. The combination of such interactions provides readily definable contacts that propagate along each crystallographic axis. 相似文献
15.
Boris A. Trofimov Lyubov' N. Sobenina Al'bina I. Mikhaleva Ol'Ga V. Petrova Vladislav N. Drichkov Igor A. Ushakov Ol'Ga A. Tarasova Darya‐Suren D. Toryashinova Yuriy Yu. Rusakov Leonid B. Krivdin 《Journal of heterocyclic chemistry》2007,44(3):505-513
16.
Anne A. Emmanuel‐Giota Konstantina C. Fylaktakidou Konstantinos E. Litinas Demetrios N. Nicolaides Dimitra J. Hadjipavlou‐Litina 《Journal of heterocyclic chemistry》2001,38(3):717-722
A series of novel 3‐(coumarin‐4‐yl)tetrahydroisoxazoles 5a,b, 7, 9 and 3‐(coumarin‐4‐yl)dihydropyra‐zoles 13a‐d, 14,15a,b were synthesized from coumarin‐4‐carboxaldehyde 1 via the intermediate N‐methyl nitrone 3 and N‐phenyl or N‐methyl hydrazones 11a,b . These coumarin derivatives were isolated, characterized and evaluated in vitro for their ability to inhibit trypsin, β‐glucuronidase, soybean lipoxygenase and to interact with the stable radical 1,1‐diphenyl‐2‐picrylhydrazyl. The compounds were tested in vivo as anti‐inflammatory agents in the rat carrageenin paw edema assay. Compound 15a seems to be a lead molecule to be modified in order to improve the lipoxygenase inhibition. The results are discussed in terms of structural characteristics. 相似文献
17.
Wen‐Yong Han Zun‐Ting Zhang Ying‐Chun Zhang Dong Xue Gang Li 《Helvetica chimica acta》2010,93(8):1641-1649
A simple and straightforward methodology toward the synthesis of novel 1‐(4,5‐diphenylpyrimidin‐2‐yl)thiourea has been developed by a one‐step reaction of isoflavones with amidinothiourea. A series of 16 new compounds was synthesized. All compounds were characterized by FT‐IR, NMR, and elemental analysis. The structure of a typical compound was established by X‐ray diffraction. A variety of substrates can participate in the process with good yields and high purities, making this methodology suitable for library synthesis in drug discovery. 相似文献
18.
《Journal of heterocyclic chemistry》2018,55(8):1935-1941
N‐2‐amino‐4‐(furan‐2‐yl)‐5,6‐dimethylnicotinonitrile ( 4 ) was utilized as key intermediate for the synthesis of some new, pyridopyrimidine, benzo[1,5][g]oxazocine, naphthoquinone, and isoindole derivatives. The structures of the newly synthesized compounds were confirmed by elemental analysis, IR, 1H‐NMR, and mass spectral data. 相似文献
19.
Abdou O. Abdelhamid Ahmed H. Elghandour Sayed A. Ahmed Yasser H. Zaki 《Journal of heterocyclic chemistry》2006,43(2):249-254
20.
Guillaume Journot Reinhard Neier Helen Stoeckli‐Evans 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(3):o119-o122
In the title compounds, C11H18N2, (II), and C13H20N2O, (III), the pyrrolidine rings have twist conformations. Compound (II) crystallizes with two independent molecules (A and B) in the asymmetric unit. The mean planes of the pyrrole and pyrrolidine rings are inclined to one another by 89.99 (11) and 89.35 (10)° in molecules A and B, respectively. In (III), the amide derivative of (II), the same dihedral angle is much smaller, at only 13.42 (10)°. In the crystal structure of (II), the individual molecules are linked via N—H...N hydrogen bonds to form inversion dimers, each with an R22(12) graph‐set motif. In the crystal structure of (III), the molecules are linked via N—H...O hydrogen bonds to form inversion dimers with an R22(16) graph‐set motif. 相似文献