Molecular Crystals and Liquid Crystals最新文献

{"title":"Design, synthesis, experimental and theoretical studies on hydrogen bond liquid crystal complexes (HBLC) derived from α, ω-dicarboxylic acid and alkyloxy benzoic acids","authors":"V. Balasubramanian, Ginson P. Joseph, S. Sundaram, V. N. Vijayakumar, R. Sukanya","doi":"10.1080/15421406.2023.2277980","DOIUrl":"https://doi.org/10.1080/15421406.2023.2277980","url":null,"abstract":"AbstractNovel hydrogen bond liquid crystal (HBLC) complexes are prepared from the combination of non-mesogenic (α, ω-dicarboxylic acid) 2, 2-Dimethylsuccinic acid (DMSA) and liquid crystalline 4-n-alkyloxybenzoic acids (nOBA, n = 7 to 12). Mesogenic behavior of all complexes is analyzed by polarized optical microscope (POM) along with their thermal properties using differential scanning calorimeter (DSC). The microstructure of DMSA + 11OBA HBLC complex is observed by Field emission-scanning electron microscope (FE-SEM). The molecular geometry of DMSA + 7OBA HBLC complex is optimized. Intermolecular H-bonding of complexes is evinced using experimental and theoretical Fourier transform infrared spectroscopy (FTIR). Natural bonding orbitals (NBO) study supported the occurrence of H-bonds.Keywords: DFT calculationHBLCMEP analysisPOMSm C AcknowledgmentsOne of the authors, V.N. Vijayakumar, acknowledges the financial support of the UGC-DAE, CSR-CRS/2022-23/04/887 dated15.05.2023, Department of Science and Technology (No. SERB/F/7454/2013-2014, dated February 21, 2014), New Delhi, and the Department of Atomic Energy (No. 34/14/14/2016-BRNS/34039, dated April 22, 2016), the Board of Research in Nuclear Science (DAE-BRNS), TNSCST/RFRS/VR/19/2018-2019/7666, dated June 6, 2019, TNSCST/RFRS/PS/VR/09/2020-2021/Dtd:27.04.2023 and infrastructural support provided by the Bannari Amman Institute of Technology, Sathyamangalam. We acknowledge NMR facility, CIC, Bharathiar University supported by DST (PURSE Phase II programme), New Delhi. The authors are grateful to Dr. R. Jayaprakasam (Rtd), Associate Professor, Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam for his constant support.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by UGC-DAE Consortium for Scientific Research, University Grants Commission.","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"69 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135479882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discotic liquid crystals of transition metal complexes 60 ^† : synthesis and π-acceptor abilities of novel discotic liquid crystals based on dithiolene nickel complex","authors":"Kazuchika Ohta, Hiroshi Hirazawa","doi":"10.1080/15421406.2023.2272393","DOIUrl":"https://doi.org/10.1080/15421406.2023.2272393","url":null,"abstract":"AbstractWe have synthesized thirteen novel metallomesogens based on dithiolene nickel complex showing π-acceptor properties: (o-C12OPhO)4DTNi (1), (m-C12OPhO)4DTNi (2), (p-C12OPhO)4DTNi (3), [o,m-(C12O)2PhO]4DTNi (4), [m,m′-(C12O)2PhO]4DTNi (5), [p,m-(CnO)2PhO]4DTNi (6: n = 10(a), 12(b), 14(c), 16(d)) and Cl-[p,m-(CnO)2PhO]4DTNi (7a–d). By using plarizing microscopic observations, differential scanning chalorimetry, and temperature-variable X-ray diffraction studies, the columnar liquid crystalline mesophases were established for the 6a–d and 7a–d derivatives. It was also revealed from the electrochemical measurements that each of the complexes of 1–7 showed good π-acceptor abilities. In particular, the derivatives, Cl-[p,m-(CnO)2PhO]4DTNi (7a–d), exhibit the most positive reduction potential from +0.08 to +0.07 V versus. SCE.Keywords: Acceptor abilitydiscotic liquid crystaldithiolne nickel complexhomeotropic alignmentmetallomesogen Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"2018 47","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of the colorful retroreflective film based on the polymer-stabilized cholesteric liquid crystal","authors":"Yajie Yang, Jinghua Zhao, Wei Liu, Yi Li, Yonggang Yang","doi":"10.1080/15421406.2023.2274665","DOIUrl":"https://doi.org/10.1080/15421406.2023.2274665","url":null,"abstract":"AbstractA cholesteric liquid crystal (CLC) mixture was prepared using a photoisomerizable chiral dopant and acrylates. With extending the irradiation time of a 365-nm UV light, the Bragg reflection band of the CLC mixture shifted to long wavelength. After photopolymerization, a polymer-stabilized CLC (PSCLC) film was obtained. The colorful PSCLC patterns with glass microspheres on the surface were prepared by controlling the competition between the photoisomerization of the chiral dopant and the photopolymerization of the acrylates. Due to the retroreflective property, the patterned PSCLC films can be applied as the traffic signs and for advertisement.Keywords: Colorful patternphotoisomerizationpolymer-stabilized cholesteric liquid crystalretroreflection Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the National Natural Science Foundation of China (No. 52273212), the Project of Scientific and Technologic Infrastructure of Suzhou (SZS201905), the Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function, and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (20KJA430009).","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"28 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135221050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular crystals and computational exploration of imines as drugs with reference to SARS-CoV-2 viral proteins","authors":"Simranjeet Singh, Mukesh Choudhary","doi":"10.1080/15421406.2023.2273670","DOIUrl":"https://doi.org/10.1080/15421406.2023.2273670","url":null,"abstract":"","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136157090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and investigation of mixed Zn–Ni spinel nanoparticles for microwave applications","authors":"O. P. Fedorchuk, T. O. Plutenko, M. O. Plutenko, O. I. V’yunov, P. V. Torchyniuk, O. V. Khomenko, Ye. V. Lobko, A. M. Darabut, M. G. Rodríguez, J. Nováková, I. Matolínová","doi":"10.1080/15421406.2023.2272391","DOIUrl":"https://doi.org/10.1080/15421406.2023.2272391","url":null,"abstract":"AbstractNickel ferrite solid solutions remain one of the main materials for a whole range of applications, including microwave equipment and components, the requirements for parameters and homogeneity of materials are constantly increasing. In this work, Ni1–xZnxFe2O4 nanoparticles with an average diameter of 12.5 nm were successfully synthesized by the microwave-assisted urea method. The temperature of a single-phase product formation was 400 °C, which is lower compared to more common precipitation from aqueous solution methods or solid-state route. Ni1–xZnxFe2O4 materials demonstrate high saturation magnetization and low coercive force. The magnetization changes with increasing Zn concentration and reaches the maximum at x = 0.5. Also, the increase in zinc content leads to an increase in the lattice parameters. The average size of ferrite nanoparticles synthesized by the microwave-assisted urea method is smaller compared to ferrites synthesized earlier by the co-precipitation method. Also, lower treatment temperatures provide higher stoichiometry, and homogeneity of materials while magnetization difference is negligible. These research results provide a general and effective route to synthesize other nanostructures for a variety of microwave components.Keywords: Lattice constantmagnetic propertiesNiFe2O4zinc substitutionZnFe2O4 AcknowledgmentsThe authors express their gratitude to the Armed Forces of Ukraine for providing security to perform this work. This work has become possible only because of the resilience and courage of the Ukrainian Army. The Czech Group acknowledges financial support from the project of the Ministry of Education, Youth and Sports (LM 2018116). The authors are grateful to the Center of Mossbauer Spectroscopy at G. V. Kurdyumov Institute for Metal Physics of the National Academy of Sciences of Ukraine.Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.Additional informationFundingThis work was supported in part by the NATO Science for Peace and Security Programme within the framework of the “3D Metamaterials for Energy Harvesting and Electromagnetic Sensing” project (ID SPS G6002).","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"43 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136160009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation of polymerizable layer on a photo-alignment layer of liquid crystal cell and its image sticking characteristics","authors":"Masanobu Mizusaki","doi":"10.1080/15421406.2023.2274664","DOIUrl":"https://doi.org/10.1080/15421406.2023.2274664","url":null,"abstract":"AbstractThe effect for polymerizable layer on a vertical-type photo-alignment layer was investigated from the point of image sticking characteristics. Fabrication process of the polymerizable layer is followings; photo-alignment treatment is firstly carried out by exposing polarized ultraviolet (UV) from the oblique direction. After construction of the liquid crystal (LC) cell, the LC material including monomers is injected, and unpolarized UV is exposed for formation of the polymerizable layer. For avoiding pretilt angle shift during the exposure, fast rate constant of polymerization is necessary, and mixed monomers 4,4’-dimethacryloyl-oxy-biphenyl (4,4’-DMABiph) and 4,4’-dimethacryloyl-oxy-benzilketal (4,4’-DMABzk) are appropriate for obtaining small level of image sticking parameters. As the image sticking parameters, residual direct current voltage (VrDC) and difference in pretilt angle (Δtilt) before and after application of alternate current voltage were evaluated, and the results of VrDC and Δtilt indicated that 6% 4,4’-DMABzk in the mixed monomers 4,4’-DMABiph and 4,4’-DMABzk would be useful for obtaining the small level of image sticking.Keywords: liquid crystal cellphoto-alignment layerpolymerizable layermonomersimage sticking4,4’-dimethacryloyl-oxy-benzilketal (4,4’-DMABzk) Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"4 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136262232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and thermal-optical behaviors of non-conventional benzidine-based oligomers containing tetrasubstituted Schiff base arms","authors":"Nur Fatin Liyana Salwadi, Guan-Yeow Yeap, Shohei Yamazaki, Nanako Kimura, Daisuke Takeuchi","doi":"10.1080/15421406.2023.2266638","DOIUrl":"https://doi.org/10.1080/15421406.2023.2266638","url":null,"abstract":"AbstractNew benzidine-based oligomers containing four Schiff base arms with terminal alkoxy chains CnH2n+1 (n = 6–12) were characterized by elemental, spectroscopic (UV, FT-IR, and NMR) and DFT techniques. The thermal-optical behaviors were observed using differential calorimetry and polarized optical microscope. Upon heating the molecules with n = 8, 10, and 12 exhibited endothermic peaks characteristic of the crystal-soft crystal B transition in addition to crystal-crystal subphases. It can be generalized that all oligomers showed unusual curing temperature of which the compounds with odd alkoxy chain carbon numbers possess lower curing temperatures in comparison with the analogous compounds of even parity.Keywords: benzidine-based oligomerscuring temperatureDFT calculationgeometric structuresoft crystal B phasespectroscopic techniques Disclosure statementThere are no conflicts to declare.Additional informationFundingThe corresponding author (G.-Y. Yeap) would like to thank the Universiti Sains Malaysia for the RUI Grant No. 1001/PKIMIA/8011034. The DFT calculations were performed using Research Center for Computational Science, Okazaki, Japan (Project: 21-IMS-C059, 22-IMS-C059).","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"45 13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of new methacrylates based on 6-phenylquinoline and their effect on the thermal degradation of polystyrene","authors":"A. Tymoshyk, A. Martynes-Harsiia, N. Iukhymenko, A. Kolendo","doi":"10.1080/15421406.2023.2262858","DOIUrl":"https://doi.org/10.1080/15421406.2023.2262858","url":null,"abstract":"AbstractIn this work for the creation of polymers of special purpose six new quinolin-6-yl-phenylmethacrylates were synthesized by acylation of 3- and 4-hydroxyphenylquinolines with methacrylic acid chloroanhydride. The structure of the synthesized compounds was proved by spectral methods. The effect of new monomers as dopands on the polystyrene destruction was investigated. It was found that the investigated additives at covalent introduction into polystyrene weakly inhibit the process of its destruction, and additives containing nitro group - even contribute to its accelerated destruction.Keywords: Methacrylic monomerspolystyrene destructionquinolin-containing monomers and polymers Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135885215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amphotropic liquid crystal polyacetylene derivative bearing pyrimidine type mesogen","authors":"Kyoka Komaba, Takuya Yonehara, Mai Ichikawa, Hiromasa Goto","doi":"10.1080/15421406.2023.2267381","DOIUrl":"https://doi.org/10.1080/15421406.2023.2267381","url":null,"abstract":"AbstractAn amphotropic liquid crystal polyacetylene derivative with pyrimidine–type two-ringed mesogenic core, exhibiting both thermotropic and lyotropic liquid crystallinity, was synthesized in this study. The polyacetylene derivative showed a lyotropic liquid crystal in d-limonene. The cis configuration of the main chain was confirmed via 1H NMR. Heat treatment induced cis–trans isomerization of the as-prepared polymer. Gas-phase iodine doping of the polymer initiated a chemical interaction between the polyene and iodine, acting as an electron acceptor, generating charge carriers (radical cations, solitons) detected with the electron spin resonance spectroscopy. Moreover, gas phase doping of the polymer induced cis–trans isomerization.Keywords: Amphotropic liquid crystald-limoneneelectrodopantelectron spin resonancemono-substituted polyacetylene AcknowledgmentsWe would like to thank the Open Facility, Research Facility Center for Science and Technology, University of Tsukuba for NMR and DSC measurements, as well as the Glass Workshop of the University of Tsukuba. P–009 as a mesogenic core material was kindly gifted by Midori Kagaku Co. (Midori Chemical Industry, Tokyo, Japan).Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by JST, the establishment of University fellowships toward the creation of science technology innovation (JPMJFS2106, K. Komaba); JST SPRING (JPMJSP2124, T. Yonehara); and Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research (No. 20K05626, H. Goto).","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135859123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two iodoargentate hybrids: syntheses, crystal structures, photocurrent responses and theoretical studies","authors":"Hong-Yao Shen, Xin-Ru Yang, Jia-Cheng Zhu, Rui-Peng Yang, Zheng-Fang Wang, Jun Li, Bo Zhang","doi":"10.1080/15421406.2023.2269749","DOIUrl":"https://doi.org/10.1080/15421406.2023.2269749","url":null,"abstract":"AbstractIn recent years, organic-inorganic hybrid iodoargentates have suffered extensive research attention due to their rich structures and unique optical and semiconductor properties. In this article, using 4,4'-dbbpy (4,4'-dbbpy = 4,4'-dibromo-2,2-bipyridine) and 5,5'-dbbpy (5,5'-dbbpy = 5,5'-dibromo-2,2-bipyridine) ligands as structural modifiers, two new iodoargentate hybrids, namely [Ni(4,4'-dbbpy)3]AgI3 (1) and [Ni(5,5'-dbbpy)3]Ag2I4 (2) have been successfully constructed, which are then structurally, optically and theoretically studied. Compounds 1 and 2 have optical band gaps at 2.45 and 2.56 eV, displaying visible light responding photocurrent intensities of 0.26 and 0.47 μA·cm−2, respectively. Additionally, the Hirshfeld surface analyses and density of states have also been investigated.Keywords: Crystal structureiodoargentateoptical propertytheoretical calculation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingWe sincerely express our thanks for the financial support from Natural Science Foundation of Shandong Province [ZR2019BB074, ZR2018LB001].","PeriodicalId":18758,"journal":{"name":"Molecular Crystals and Liquid Crystals","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135858066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}