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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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Residual Stress Behavior in Methylsilsesquioxane-Based Dielectric Thin Films 甲基硅氧烷基介电薄膜的残余应力行为
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024768
W. Oh, T. Shin, M. Ree, M. Jin, K. Char
{"title":"Residual Stress Behavior in Methylsilsesquioxane-Based Dielectric Thin Films","authors":"W. Oh, T. Shin, M. Ree, M. Jin, K. Char","doi":"10.1080/10587250108024768","DOIUrl":"https://doi.org/10.1080/10587250108024768","url":null,"abstract":"Abstract Residual stress of methylsilsequioxane film, which was spin-coated on silicon substrate and followed by soft-baking, was measured in-situ during curing and subsequent cooling with varying processing conditions. The thickness and refractive index of the cured films were measured using ellipsometry. Their structure was also examined by X-ray diffraction.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"30 1","pages":"397 - 402"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86355793","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: 8
Uniaxial Stretching of Polypyrrole Cast Film 聚吡咯铸膜的单轴拉伸
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030094
Kitae Song, H. Rhee, Sang Yun Lee, J. Joo, J. Y. Lee
{"title":"Uniaxial Stretching of Polypyrrole Cast Film","authors":"Kitae Song, H. Rhee, Sang Yun Lee, J. Joo, J. Y. Lee","doi":"10.1080/10587250108030094","DOIUrl":"https://doi.org/10.1080/10587250108030094","url":null,"abstract":"Abstract Uniaxial stretching of polypyrrole (PPy) cast film significantly improved the electrical conductivity and break strength of the film in the stretching direction. The electrostatic effect of nitrogen atoms in pyrrole rings was also increased from 44% to 56% by stretching without change in the doping level. These phenomena indicate that stretching can induce more extended conformation of PPy molecules in the cast film.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"27 1","pages":"305 - 308"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82837363","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
Preparation of Heteropoly Acid Entraped in Nano Silica Matrix 纳米二氧化硅包埋杂多酸的制备
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024705
Hyun Jong Kim, Y. Chu, J. Moon, Haksoo Han, Y. Shul
{"title":"Preparation of Heteropoly Acid Entraped in Nano Silica Matrix","authors":"Hyun Jong Kim, Y. Chu, J. Moon, Haksoo Han, Y. Shul","doi":"10.1080/10587250108024705","DOIUrl":"https://doi.org/10.1080/10587250108024705","url":null,"abstract":"Abstract Heteropoly acid entraped in nano silica matrix was prepared by the microemulsions method. The primary particle size was less than 400nm and it decreased with the content of the heteropoly acid. When these silica particles were blended with sulfonated polyethersulfone, the HPA could be effectively immobilized in aqueous environment. The conductivity of this composite electrolyte was 1.4×10−3 S/cm with the 15% HPA.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"5 1","pages":"131 - 134"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80577018","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: 5
Anionic Polymerization of Isocyanates with Optically Active Properties 具有光学活性的异氰酸酯的阴离子聚合
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030068
Yeong-Deuk Shin, Jun-Hwan Ahn, Jae‐Suk Lee
{"title":"Anionic Polymerization of Isocyanates with Optically Active Properties","authors":"Yeong-Deuk Shin, Jun-Hwan Ahn, Jae‐Suk Lee","doi":"10.1080/10587250108030068","DOIUrl":"https://doi.org/10.1080/10587250108030068","url":null,"abstract":"Abstract Random copolymers, an optically functionalized isocyanate containing disperse red 1 (DR1NCO) with a chiral isocyanate containing (s)-(-)-2-methylbutanol (MBI), were prepared by anionic polymerization in THF at -98°C with Na-Naph as a two-directional initiator. As the contents of MBI in the copolymer increased, the optical rotation of the polymer was also increased. To study about the optical activity change with initiator systems, homo polymer of MBI was synthesized with one-directional and two-directional initiator. The difference of optical activity in both systems was investigated using Circular Dichroism (CD) spectroscopy and optical rotation.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"189 - 192"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81024250","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
Effect of Cation-Mixing on Photo Luminescence of PbI2-based Organic/Inorganic Perovskite Thin Films 阳离子混合对pbi2基有机/无机钙钛矿薄膜光致发光的影响
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030052
Yumeko Komatsu, N. Sakamoto, M. Era
{"title":"Effect of Cation-Mixing on Photo Luminescence of PbI2-based Organic/Inorganic Perovskite Thin Films","authors":"Yumeko Komatsu, N. Sakamoto, M. Era","doi":"10.1080/10587250108030052","DOIUrl":"https://doi.org/10.1080/10587250108030052","url":null,"abstract":"Abstract The influence of cation-mixing on photo luminescence(PL) of PbI2-based organic/inorganic perovskite thin films expressed by chemical formula (C6H9C2H4NH3)2PbI4 was investigated. Cation-mixing to inorganic layer by addition of ZnI2 or CdI2 did not affect the character of exciton in the films because all optical spectra of the (CHE)2(Pb,M)I4 films were the same profile. Dependence of PL intensity at 2.4eV of photon energy(PL2.4) on inorganic layer compositions was changed by kind of additive cation. In the case of Zn addition, PL2.4 was uniformly decreased with an increase of additive amounts of Zn. On the other hand, PL2.4 of the (C6H9C2H4NH3)2(Pb, Cd)I4 films remarkably increased with increasing of Cd concentration up to 20mol%Cd. It was obvious that cation-mixing with Cd is effective to advance the optical properties of the (C6H9C2H4NH3)2PbI4 films. Relationships between PL2.4 and layer structure of the films were discussed according to structural analysis using XRD.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"106 1","pages":"123 - 126"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81161603","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
The Highly Efficient Polymeric Photorefractive Materials: Influence of Alkyl End Group of Chromophore on Photorefractive Properties 高效聚合物光折变材料:发色团烷基端基对光折变性能的影响
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030048
H. Chun, I. Moon, Dong-Ho Shin, Nakjoong Kim
{"title":"The Highly Efficient Polymeric Photorefractive Materials: Influence of Alkyl End Group of Chromophore on Photorefractive Properties","authors":"H. Chun, I. Moon, Dong-Ho Shin, Nakjoong Kim","doi":"10.1080/10587250108030048","DOIUrl":"https://doi.org/10.1080/10587250108030048","url":null,"abstract":"Abstract Photorefractive composites based on carbazole-substituted polysiloxane, doped with a series of NLO chromophores and photo-sensitizer were presented. The alkyl end group of chromophore was observed to influence electro-optic and photoconductivity of composite, in addition to device stability. And the gain coefficient of composite containing 4-diethylaminobenzylidene malonitrile as a chromophore was over 100 cm −1 at 60 V/μm. And gain of composite was ca.2.0 at 90 V/μm, which indicates that the pump beam was almost transferred to the signal beam.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"74 1","pages":"107 - 110"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88518131","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
Optically Induced Diffraction Grating on the Film of Polyurethane Bearing an Azobenzene Chromophore 含偶氮苯发色团聚氨酯薄膜上的光致衍射光栅
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024739
D. Choi, J. H. Kim, Y. Cha, Hyun Taig Hong
{"title":"Optically Induced Diffraction Grating on the Film of Polyurethane Bearing an Azobenzene Chromophore","authors":"D. Choi, J. H. Kim, Y. Cha, Hyun Taig Hong","doi":"10.1080/10587250108024739","DOIUrl":"https://doi.org/10.1080/10587250108024739","url":null,"abstract":"Abstract Polyurethane bearing an aminonitroazobenzene was synthesized for fabricating the diffraction grating on the film surface. Two beam coupling method was employed for fabricating the diffraction grating. The dynamics of diffraction grating was studied in term of the variation of the diffraction efficiency. The long-term stability of the diffraction efficiency was also investigated.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"125 1","pages":"273 - 276"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89283624","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
Crystal and Molecular Structure of 3,5,6-Trichloro-2-Pyridinol Complexes 3,5,6-三氯-2-吡啶醇配合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: 10.1080/10587250108030018
M. A. Sridhar, N. K. Lokanath, J. S. Prasad, A. Pasha
{"title":"Crystal and Molecular Structure of 3,5,6-Trichloro-2-Pyridinol Complexes","authors":"M. A. Sridhar, N. K. Lokanath, J. S. Prasad, A. Pasha","doi":"10.1080/10587250108030018","DOIUrl":"https://doi.org/10.1080/10587250108030018","url":null,"abstract":"Abstract The complex (A), 3,5,6-trichloro-2-pyridinol-piperazine, C9H12N3OCl3, crystallizes in the monoclinic space group P21/n with the parameters a=8.915(4) A, b=7.062(3) Å, c=19.039(5) Å, β=102.79(3)°, V=1168.9(8) Å3, Z=4. The structure was solved by direct methods using SHELXS-86 (Sheldrick, 1990) and refined using SHELXL-93 (Sheldrick, 1993). The final residual factor is R1=0.0662 for 1273 reflections with I > 2[sgrave](I). The structure has intermolecular hydrogen bonds. The molecules which are stacked in layers are interconnected through the hydrogen bonds. The complex B, 3,5,6-trichloro-2-pyridinol-piperdine, C10H13N2OCl3, crystallizes in the monoclinic space group P21/c with the parameters a=12.514(4) Å, b=22.464(2) Å, c=13.765(3) Å, β=98.02(2)°, V=3831.9(2) Å3, Z=12. The structure was solved by direct methods using SHELXS-86 and refined using SHELXL-93. The final residual factor is R1=0.072 for 2662 reflections with I > 2[sgrave](I). The structure has both intra and intermolecular hydrogen bonds.","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"99 1","pages":"153 - 165"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86953403","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
The Optical Characteristics of the Light Emitting Device with TPD and PBD Thin Films TPD和PBD薄膜发光器件的光学特性
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108024775
D. Shin, Jung-Hyun Kim
{"title":"The Optical Characteristics of the Light Emitting Device with TPD and PBD Thin Films","authors":"D. Shin, Jung-Hyun Kim","doi":"10.1080/10587250108024775","DOIUrl":"https://doi.org/10.1080/10587250108024775","url":null,"abstract":"Abstract The emission spectra generated from the electroluminescence (EL) devices on CuPC (copper phthalocyanine) / TPD (N,N′-diphenyl-N,N′-di(m-tolyl)-benzidine) / PBD (2-(4-biphenylyl)-5(4-tert-butyl-phenyl)-1,3,4-oxadiazole) had been studied. The EL devices emitted blue light two emission maxima, and one of them is about 50 nm bathochromic shifted from the photoluminescence maximum [2]. The bathochromic shift is caused by the new energy state generated under a high electric field [1].","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"427 - 430"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89242909","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
Orientational Behavior of Discotic Nematic Phase for a Discotic Liquid Crystalline Triphenylene on Polyimide and Alkylammoniumbromide Coated Substrates 盘状液晶三苯在聚酰亚胺和烷基溴化铵涂覆基底上的盘状向列相取向行为
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI: 10.1080/10587250108030079
H. Monobe, Shoji Mima, M. Ukon, T. Sugino, Y. Shimizu
{"title":"Orientational Behavior of Discotic Nematic Phase for a Discotic Liquid Crystalline Triphenylene on Polyimide and Alkylammoniumbromide Coated Substrates","authors":"H. Monobe, Shoji Mima, M. Ukon, T. Sugino, Y. Shimizu","doi":"10.1080/10587250108030079","DOIUrl":"https://doi.org/10.1080/10587250108030079","url":null,"abstract":"Abstract Orientational behavior of a discotic liquid crystalline triphenylene (C8OBT) on the substrates coated with a polyimide and a cetyltrimethylammoniumbromide (CTAB) was investigated by polarizing microscopy. The averaged direction and the order parameters of the triphenylene core plane and carbonyl groups of C8OBT were evaluated by an infrared dichroic method. C8OBT exhibits a homeotropic alignment on a polyimide film as for the discotic nematic (ND) phase, while it shows a tilt or homogeneous alignment on a CTAB-coated substrate. The order parameter of triphenylene ND phase is higher on the polyimide (S = 0.6) than a CTAB-coated substrate (0.2), in contrast to that of the carbonyl groups is comparable (0.2).","PeriodicalId":18940,"journal":{"name":"Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals","volume":"34 1","pages":"241 - 244"},"PeriodicalIF":0.0,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73239985","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
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