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Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals最新文献

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Crystal and Molecular Structure of Addition Products of Dimethyl Acetylene Dicarboxylate and N, N′-Thiocarbanilyl Hydrazine 二甲基乙炔二羧酸酯和N, N ' -硫代氨基肼加成产物的晶体和分子结构
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030020
S. Deepthi, K. Rajalakshmi, K. Gunasekaran, D. Velmurugan, Kuppuswamy Nagarajan
{"title":"Crystal and Molecular Structure of Addition Products of Dimethyl Acetylene Dicarboxylate and N, N′-Thiocarbanilyl Hydrazine","authors":"S. Deepthi, K. Rajalakshmi, K. Gunasekaran, D. Velmurugan, Kuppuswamy Nagarajan","doi":"10.1080/10587250108030020","DOIUrl":"https://doi.org/10.1080/10587250108030020","url":null,"abstract":"Abstract The compound was synthesized from a reaction between N, N′- dithiocarbanilyl hydrazine and dimethyl acetylene dicarboxylate. X-ray diffraction analysis of one of the reaction products in two different solvents gave triclinic crystals, [Space group = P Ī, a = 13.273(8)Å, b = 19.16(10)Å, c = 10.965(4)Å, a = 95.73(4)°, β = 90.86(4)°, γ = 75.91(4)°, Z = 4] and monoclinic crystals, [Space group = C2/c, a = 34.784(1)Å, b = 13.119(1) Å, c = 21.096(2) Å, a = 90°, β = 91.72(1)°, γ = 90°, Z = 16] respectively. The carbo-methoxy in the triclinic form is cis to C=O in one molecule and trans in the other molecule while it is trans in both the molecules of the monoclinic form. There is a stacking of the five membered ring with phenyl rings in addition to the partial stacking between the five membered rings. The carbonyl groups point towards the centre of the heterocyclic five membered rings mimicking the O4′ … base interaction in Z — DNA. The structure is stabilized by extensive intermolecular C-H…N, O-H…O and C-H…O hydrogen bonds. The solvent molecules also stabilize the packing of the molecules through hydrogen bonds.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"221 - 242"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75256316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
White-Light-Emitting Materials for Organic Electroluminescent Devices 有机电致发光器件用白光材料
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024730
Ju Won Lee, Y. K. Kim, B. C. Sohn, Jin-Soon Kim, Sung Min Kim, Yunkyoung Ha
{"title":"White-Light-Emitting Materials for Organic Electroluminescent Devices","authors":"Ju Won Lee, Y. K. Kim, B. C. Sohn, Jin-Soon Kim, Sung Min Kim, Yunkyoung Ha","doi":"10.1080/10587250108024730","DOIUrl":"https://doi.org/10.1080/10587250108024730","url":null,"abstract":"Abstract A chelate-metal complex such as zinc bis(2-(2-hydroxyphenyl) benzothiazolate) (Zn(BTZ)2) was known to show white emission with a broad electroluminescence[1–2]. In this study, the electroluminescent characteristics of Be(BTZ)2 and Mg(BTZ)2, as well as Zn(BTZ)2 were investigated using organic electroluminescent devices with the structure of ITO/TPD/Be(BTZ)2, Mg(BTZ)2, or Zn(BTZ)2 /Al. It was found that the device containing Be(BTZ)2 shows the highest power efficiency.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"28 1","pages":"235 - 238"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78195253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Behavior of Poly(σ-aklyl α, L-glutamate)-Polyethylene Oxide Copolymer at the Air/Interface 聚(σ-丙烯基α， l -谷氨酸)-聚氧化物共聚物在空气/界面上的行为
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030072
Chul Kim, K. Kim, Youngil Lee, D. Sohn
{"title":"Behavior of Poly(σ-aklyl α, L-glutamate)-Polyethylene Oxide Copolymer at the Air/Interface","authors":"Chul Kim, K. Kim, Youngil Lee, D. Sohn","doi":"10.1080/10587250108030072","DOIUrl":"https://doi.org/10.1080/10587250108030072","url":null,"abstract":"Abstract Side chain polyglutamate-poly(ethylene oxide) (PALG-PEO) diblock copolymers were synthesized by side chain glutamete NCA (N-carboxy anhydride). These molecules form monolayer at the air/water interface due to the amphiphilic character of the hydrophobic side chains of the rod and hydrophilic poly(ethylene oxide). Conformational change of the poly(ethylene oxide) and topology of the rodlike polymer have been studied by surface area-surface pressure isotherm. At low density PEO block contributes surface pressure and generates pancake to blush-like transition. PALG block is laid down at the air/water interface and contributes the high surface pressure. We have observed two different phase transitions that depend on the size of the rod and the area of the absorbed PEO block at the air/water interface.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"886 1","pages":"211 - 214"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72666259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimal-Fabrication Conditions of Cytochrome c LB Films 细胞色素c LB膜的最佳制备条件
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030097
Jeong-woo Choi, Chang-Jun Yoo, Yun-Suk Nam, W. Lee, S. Oh, M. Fujihira
{"title":"Optimal-Fabrication Conditions of Cytochrome c LB Films","authors":"Jeong-woo Choi, Chang-Jun Yoo, Yun-Suk Nam, W. Lee, S. Oh, M. Fujihira","doi":"10.1080/10587250108030097","DOIUrl":"https://doi.org/10.1080/10587250108030097","url":null,"abstract":"Abstract The optimal fabrication condition of cytochrome c Langmuir-Blodgett (LB) film was investigated. To verify the pH dependence of cytochrome c film formation, the various π-A isotherms were obtained at pH 6.0, 7.0, 8.0, 9.0, and 10.0, respectively. The cytochrome c LB films were then fabricated onto the quartz substrate, and the deposition of cytochrome c LB films was investigated by UV-visible spectroscopy.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"37 1","pages":"317 - 320"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77454015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
In situ Observation of Deep UV Patterning in Polymer LB Films by Surface Plasmon Spectroscopy 用表面等离子体光谱原位观察聚合物LB膜的深紫外图案
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030086
M. Mitsuishi, Tiesheng Li, T. Miyashita
{"title":"In situ Observation of Deep UV Patterning in Polymer LB Films by Surface Plasmon Spectroscopy","authors":"M. Mitsuishi, Tiesheng Li, T. Miyashita","doi":"10.1080/10587250108030086","DOIUrl":"https://doi.org/10.1080/10587250108030086","url":null,"abstract":"Abstract The paper describes in situ observation of the photopattern formation in polymer Langmuir-Blodgett (LB) film by surface plasmon spectroscopy. The copolymers (p(DDA/tBVPC)) of N-dodecylacrylamide (DDA) which is known to form a stable monolayer with a photo-degradable monomer, tert-butyl-4-vinylphenyl carbonate (tBVPC), form a stable monolayer and LB film. When the copolymer LB films were irradiated by deep UV light in air, the photodecomposition took place, consequently the thickness in the LB film was gradually decreased. On the other hand, there were no significant changes in the thickness with the irradiation at the argon atmosphere. It was found that the molecular oxygen plays a decisive role in yielding the positive-tone pattern in the p(DDA/tBVPC) LB films.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"17 1","pages":"269 - 272"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81966173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Dielectric Study on Some Solid Complexes: Molecular Motion in the Isomorphous High-Temperature Forms 某些固体配合物的介电研究:高温同晶形态下的分子运动
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030016
Y. Matsunaga, M. Terada
{"title":"Dielectric Study on Some Solid Complexes: Molecular Motion in the Isomorphous High-Temperature Forms","authors":"Y. Matsunaga, M. Terada","doi":"10.1080/10587250108030016","DOIUrl":"https://doi.org/10.1080/10587250108030016","url":null,"abstract":"Abstract The relative permittivity of pyrene-2,4-dinitrofluorobenzene, -2,4-dinitrochlorobenzene, -2,4-dinitrotoluene, and -2,4-dinitrophenol complexes and fluoranthene-2,4-dinitrophenol complex increases abruptly upon the polymorphic transition. The molar polarization measured below the transition temperature agrees with the molar refraction except for the second complex which shows a marked positive deviation. The dipole moment of the acceptor molecules in the high-temperature form was calculated on the assumption that the rotational freedom around the axis perpendicular to the ring plane gives rise to the orientation in an externally applied electric field and was found in good accordance with the literature or estimated value.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"13 1","pages":"139 - 144"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77796075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Suppression Effect and Coupled Two-Time Motion of the Photoisomerization in the Crosslinking Polymer System 交联聚合物体系光异构化的抑制效应及耦合二次运动
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024734
Mi-Yun Jeong, J. Wu, Jung-il Jin
{"title":"Suppression Effect and Coupled Two-Time Motion of the Photoisomerization in the Crosslinking Polymer System","authors":"Mi-Yun Jeong, J. Wu, Jung-il Jin","doi":"10.1080/10587250108024734","DOIUrl":"https://doi.org/10.1080/10587250108024734","url":null,"abstract":"Abstract The photoisomerization of the crosslinked and uncrosslinked polymer-pair with azo linkages was studied by the photoinduced birefringence. The photoisomerization of azo chromophores could be controlled by crosslinking process. The inducement of birefringence in crosslinked system indicates that the photoisomerization of chromophore rearranges the orientation not only of the chromophore itself but also of polymer main chain. From the data analysis by biexponential function, it is found that there are two characteristic time scales in the photoisomerization process and they exhibit a coupled relation.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"97 1","pages":"253 - 256"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76677073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Characterization of Soluble Polyaniline and Its Derivatives Doped with Dialkylsulfates 二烷基磺酸掺杂可溶聚苯胺及其衍生物的合成与表征
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024752
K. Jang, S. Han, E. Oh
{"title":"Synthesis and Characterization of Soluble Polyaniline and Its Derivatives Doped with Dialkylsulfates","authors":"K. Jang, S. Han, E. Oh","doi":"10.1080/10587250108024752","DOIUrl":"https://doi.org/10.1080/10587250108024752","url":null,"abstract":"Abstract Soluble polyaniline and its derivatives doped with dialkylsulfate (DAS : dimethylsulfate, diethyl sulfate, dipropylsulfate etc.) were chemically synthesized. Solubilities of polyaniline doped with DAS (PANI·DAS) powders in polar solvents and polyethoxy aniline doped with DAS (PEtOANI·DAS) powders in various alcohols were observed in the range of 3–8 wt.% and 2–5 wt.%, respectively. This improved solubility in organic polar solvents was explained with the interactions between the hydrophilic sulfonate group, polar substituent and polar solvents. Compared to that of HCl doped polyaniline, PANI·DAS showed improved thermal stability upon heat treatment at 160 °C. The electrical conductivities of PANI·DAS and PEtOANI·DAS films appeared in the range of 1.2∼2.3 S/cm and 10−2∼10−4 S/cm, respectively.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"325 - 328"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82287077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dielectric Phenomena of An Organic Light Emitting Diode 有机发光二极管的介电现象
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030042
Yong-soo Lee, Jae-hyuk Lee, Jae-Hoon Park, J. Choi
{"title":"Dielectric Phenomena of An Organic Light Emitting Diode","authors":"Yong-soo Lee, Jae-hyuk Lee, Jae-Hoon Park, J. Choi","doi":"10.1080/10587250108030042","DOIUrl":"https://doi.org/10.1080/10587250108030042","url":null,"abstract":"Abstract The dielectric properties of an organic light emitting diode have been studied. Dielectric constant showed the frequency independence in the low frequency range below 100kHz, while the frequency dependent property was observed at above 100kHz. Dielectric loss factor showed the peak at about 300kHz, which might be attributed to the dipolar polarization. The dielectric relaxation time is calculated to be about 0.531 μs from the complex dielectric constant plot. We obtained the frequency dependent properties of OLED by measuring its capacitance and quality factors.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"22 1","pages":"73 - 76"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81451398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Eletrochemical Detection of Magnesium Ions Using PVC Membrane Trapped Chlorophyll A Molecules PVC膜捕获叶绿素A分子对镁离子的电化学检测
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024767
Hua Lu, Yujie Zhao, Jianmin Ma, Jiong Li, Hong Wang, Zuhong Lu
{"title":"Eletrochemical Detection of Magnesium Ions Using PVC Membrane Trapped Chlorophyll A Molecules","authors":"Hua Lu, Yujie Zhao, Jianmin Ma, Jiong Li, Hong Wang, Zuhong Lu","doi":"10.1080/10587250108024767","DOIUrl":"https://doi.org/10.1080/10587250108024767","url":null,"abstract":"Abstract This paper presents a novel PVC membrane electrochemical biosensor for Mg2+ ions based on chlorophyll a as bioelectroactive membrane carrier. The sensor displays a Nernstian response for Mg2+ concentration range from 1× 10−5 M to 1× 10−1 M with a slope of 30.41 mV. The response time and selectivity for Mg2+ in comparison to some other cations have also been studied.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"28 1","pages":"391 - 396"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76436703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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