发布求助
文献互助 智能选刊 最新文献

International School on Spectroscopy of Molecules and Crystals最新文献

筛选
英文 中文
Temperature dependence of luminescence spectra of δ-KIO3-HIO3 crystal δ-KIO3-HIO3晶体发光光谱的温度依赖性
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486678
T. Gavrilko, V. Melnik, G. Puchkovska
{"title":"Temperature dependence of luminescence spectra of δ-KIO3-HIO3 crystal","authors":"T. Gavrilko, V. Melnik, G. Puchkovska","doi":"10.1117/12.486678","DOIUrl":"https://doi.org/10.1117/12.486678","url":null,"abstract":"In the present, photoluminescence of δ-KIO3 HIO3 crystals has been studied for the first time in the temperature range of 4.2-77K. It was shown experimentally that at T=4.2 K the edge of self-absorption band is located near 295 nm. In the luminescence spectra of the title crystal, two bands are found which differ in their spectral position and lifetime. The short-wave luminescence band centered at 367.5 nm. This band appears only in the csae of the crystal excitation by the light with the wavelength that does not fall in the region of self-absorption of the crystal, eg λexc = 340 nm. When the temperature increases from 4.2 to 34 K, the intensity of this band falls down almost to the background value, whereas the position of its maximum remains practically unchanged. The long-wave luminscence band of the δ-KIO3 HIO3 crystal with peak position at 410-420 nm and the lifetime of about 1 s is attributed to phosphorescence. This spectrum appears only in the case of excitation within the region of self-absorption of the crystal, eg λ3xc = 275 nm. On the basis of experimental data analysis, the assumption has been made that the short-wave band originates from the emission of excitons located at the defects of the crystal structure, and the long-wave band is related to radiation decay of autolocated bihalide excitons. Possible photoprocesses in the title crystal caused by light absorption of different wavelength are discussed.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134638839","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
Investigation of conformational mobility of 4-pentyl-4'-cyanobiphenyl by IR spectroscopy methods 红外光谱法研究4-戊基-4′-氰联苯的构象迁移率
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486660
L. Babkov, E. Vedyaeva, I. Gnatyuk, G. Puchkovska, S. Truhachev, J. Kukielski
{"title":"Investigation of conformational mobility of 4-pentyl-4'-cyanobiphenyl by IR spectroscopy methods","authors":"L. Babkov, E. Vedyaeva, I. Gnatyuk, G. Puchkovska, S. Truhachev, J. Kukielski","doi":"10.1117/12.486660","DOIUrl":"https://doi.org/10.1117/12.486660","url":null,"abstract":"The conformational mobility and structure of 4-pentyl-4'-cyanobiphenyl (5CB) in liquid and liquid crystal states have been investigated by methods of IR spectroscopy. IR absorption spectra are measured in the temperature range of 297-425 K in 400-4000 cm-1 spectral region. The IR spectra are modeled for the conformers of 5CB which differ in the orientaiton of the alkyl radical wiht respect to the biphenyl fragment and of the benzene rings with respect to one another. It is found that the temperature changes of IR spectra are determined by the molecule conformational mobility of 5CB. From the analysis of the spectra, we determined the most probable configurations of the molecules which were realized in the sample within the studied temperature interval.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"3 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125874597","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
Charge transfer complexes between polysilanes and acceptor molecules 聚硅烷与受体分子之间的电荷转移配合物
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486650
N. Ostapenko, I. Sekirin, D. N. Tulchynskaya, S. Suto, A. Watanabe
{"title":"Charge transfer complexes between polysilanes and acceptor molecules","authors":"N. Ostapenko, I. Sekirin, D. N. Tulchynskaya, S. Suto, A. Watanabe","doi":"10.1117/12.486650","DOIUrl":"https://doi.org/10.1117/12.486650","url":null,"abstract":"The absorption spectra of the solutions of polysilanes like poly(methylphenylsilane) and poly(dihexylsilane) with various acceptors were investigated. It is shown that several new broad bands in visible reigon arise in the absorption spectra of polysilanes with addition of acceptors, which is accompanied by changes in the color of the solutions. These new bands are attributed to formation of CT-complexes between σ-donor and π-acceptor, i.e., polysilanes with admixture of acceptors can be used both as transport layers and photogeneration ones. The possible nature of the structure of the absorption bands of these CT-complexes is discussed.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121561758","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
Angular behavior of E-doublets in Raman spectra of tetragonal gyrotropic crystals 四方旋向晶体拉曼光谱中e -重偶态的角行为
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486677
S. G. Garasevich, A. Slobodyanyuk
{"title":"Angular behavior of E-doublets in Raman spectra of tetragonal gyrotropic crystals","authors":"S. G. Garasevich, A. Slobodyanyuk","doi":"10.1117/12.486677","DOIUrl":"https://doi.org/10.1117/12.486677","url":null,"abstract":"Angular dependencies of the Raman modes frequency on direciton of phonon wave vector q in tetragonal gyrotropic crystals TeO2, ZnP2, and CdP2 were investigated and compared. We observed two completely different types of angular behavior of E-doublets splitting in depending on relative contributions of spatial dispersion and long-range Coulomb interaction. The explanation of apparent anomalous dependence of E-doublet 122 cm-1 splitting on q in TeO2 is proposed.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134325030","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
Induced cholesteric systems based on some cyano derivatives as host phases 以某些氰基衍生物为宿主相的诱导胆甾体系
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486654
Natalya I. Shkolnikova, L. Kutulya, V. Vashchenko, A. Fedoryako, V. Lapanik, N. R. Posledovich
{"title":"Induced cholesteric systems based on some cyano derivatives as host phases","authors":"Natalya I. Shkolnikova, L. Kutulya, V. Vashchenko, A. Fedoryako, V. Lapanik, N. R. Posledovich","doi":"10.1117/12.486654","DOIUrl":"https://doi.org/10.1117/12.486654","url":null,"abstract":"Macroscopical properties of some induced cholesteric compositions based on 4-pentyl-4'-cyano derivatives of biphenyl and phenylcyclohexane as host phases have been investigated. The series of N-arylidene derivatives of (S)-1-phenylethylamine with varied both rigid moiety of the N-arylidene fragment and terminal substituent was used as chiral dopants. The influence of the chiral dopant molecular structure as well as of physical properties of the host phases used on the helical twisting power, the temperature dependence of the induced helical pitch and the N* mesophase thermal stability has been characterized. It has been concluded that the distinctions in properties of the LC systems containing the OCH2 and COO linking groups are caused by their different conformational states.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129786932","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
Excimer molecules. Halogenides of noble gases. 准分子分子。惰性气体的卤化物。
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486646
N. Zubrilin
{"title":"Excimer molecules. Halogenides of noble gases.","authors":"N. Zubrilin","doi":"10.1117/12.486646","DOIUrl":"https://doi.org/10.1117/12.486646","url":null,"abstract":"In the paper, molecules formed on the basis of the noble-gas monohalogenides are considered. ELectron and rotatinal structure of excimer molecules is considerd. Occurrence of some specific levels, conditioned by a small coupling energy in the ground state of molecules of the noble-gas monohalogenides is discussed. Main attention is paid to the electron and rotational structure of XeCl and XeF molecules.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130963093","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
Corporate proton dynamics in δ-KIO3+HIO3 crystal as deduced from ν(OH) and δ(OH) band profiles ν(OH)和δ(OH)波段谱图推导出δ- kio3 +HIO3晶体的质子动力学
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486680
B. Engelen, T. Gavrilko, M. Panthofer, G. Puchkovska, J. Baran, H. Ratajczak
{"title":"Corporate proton dynamics in δ-KIO3+HIO3 crystal as deduced from ν(OH) and δ(OH) band profiles","authors":"B. Engelen, T. Gavrilko, M. Panthofer, G. Puchkovska, J. Baran, H. Ratajczak","doi":"10.1117/12.486680","DOIUrl":"https://doi.org/10.1117/12.486680","url":null,"abstract":"IR spectra of polycrystalline δ-KIO3 HIO3 have been studied in the temperature range from 13 to 300 K. A systematic temperature dependent study has been performed for the hydrogen bond stretching and bending vibrations. Features observed in the high frequency region of vibrational spectra of the title crystal are discussed with respect to possible formation of new charge compensating protonic species in the proton sublattice.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116447021","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
Internal Stark effect mediates intramolecular excited-state proton transfer in 3-hydroxyflavone derivatives 内部Stark效应介导3-羟基黄酮衍生物分子内激发态质子转移
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486637
A. Klymchenko, A. Demchenko
{"title":"Internal Stark effect mediates intramolecular excited-state proton transfer in 3-hydroxyflavone derivatives","authors":"A. Klymchenko, A. Demchenko","doi":"10.1117/12.486637","DOIUrl":"https://doi.org/10.1117/12.486637","url":null,"abstract":"Internal Stark effect in electronic spectra is the effect that is observed when the electronic bands shift udner the influence of promixal charges. In order to study the possible involvement of this effect in modulating the intramolecular proton transfer reactions in the excited state, we designed and studied several derivatives of 3-hydroxyflavone. They include the species containing neutral and positively charged substituents in 6 position of chromone ring. These compounds were studied in solvents of different polarities. In these experiments the shifts of both normal and tautomer flurosence bands are clearly observed in a manner predicted by Stark effect theory. In addition, a dramatic effect of suppression by introduced charge of intramolecular excited-state proton transfer was observed.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124402428","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
Temperature study of resonance intermolecular interaction in the aliphatic crystals using spectra of IR absorption 用红外吸收光谱研究脂肪族晶体中共振分子间相互作用的温度
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486655
V. Danchuk, A. Kravchuk, S. Makarenko, G. Puchkovska, S. Chazhengina, E. Kotelnikova
{"title":"Temperature study of resonance intermolecular interaction in the aliphatic crystals using spectra of IR absorption","authors":"V. Danchuk, A. Kravchuk, S. Makarenko, G. Puchkovska, S. Chazhengina, E. Kotelnikova","doi":"10.1117/12.486655","DOIUrl":"https://doi.org/10.1117/12.486655","url":null,"abstract":"In this work, on the example of odd-numbered normal paraffins and α-olefins we propose a mechanism which explains the temperature dependence of the amgnitud eof Davydov splitting Δυ1,2 of the bands of scissoring and rocking vibrations of methylene chains of long-chain compounds with frequencies 1456 and 720 cm-1, respectively. This mechanism is connected with damping of the intramolecular vibrational excitons in crystals due to their interactin with orientational defects of the lattice which emerge as a result of excitation of librational-rotational degrees of freedom of organic molecules in the region of the phase transition of order-orientaional disorder type. Good agreement was observed bewteen theoretical and experimental results.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122206819","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
Usage of photorefractive crystals in holographic associative correlators 光折变晶体在全息关联相关器中的应用
International School on Spectroscopy of Molecules and Crystals Pub Date : 2002-12-01 DOI: 10.1117/12.486640
O. Gnatovsky, N. M. Medved, V. Nesprava, L. Pryadko, T. Semenets
{"title":"Usage of photorefractive crystals in holographic associative correlators","authors":"O. Gnatovsky, N. M. Medved, V. Nesprava, L. Pryadko, T. Semenets","doi":"10.1117/12.486640","DOIUrl":"https://doi.org/10.1117/12.486640","url":null,"abstract":"Photorefractive material have certain prospects for usage in coherent-optical schemes of the optical signal processing. Their values in this aspect are non-linear resopnse to the intensity of signal and variety of temporal characteristics of record and erasure of images, including holographic ones. In this presentation, questions connected with usage of photorefractive crystals in the holographic correlator with the associative resopnse to fragments of recognized signal were investigated. Particularity of the correlator scheme consists in getting response in the manner of the signal under investigation itself. Due to it, the level of signal identification increases under its associative processing. Use of spatial modulator of signal wave front and photorefractive crystals in the scheme allows to vary a structure of angular spectrum of recorded images when writing the holograms. In certain limits, it gives a possibility to control sensitivity of image as to change of structure of fragments which restore a hologram, keeping stable associative response.","PeriodicalId":205850,"journal":{"name":"International School on Spectroscopy of Molecules and Crystals","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125268284","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信