Sub-picosecond fluorescence evolution of amino-cyano-stilbenes in methanol: polar solvation obeys continuum theory without evidence of twisting

文献信息

发布日期 2008-02-19
DOI 10.1039/B717541H
影响因子 3.676
作者

Nikolaus P. Ernsting, Jens Breffke, Dmitry Yu. Vorobyev, David A. Duncan, Inga Pfeffer


查看原文

摘要

The spectral evolution of fluorescence from 4-(dimethylamino)-4′-cyanostilbene (DCS) in methanol, and of two derivatives bearing either the anilino (ACS) or the julolidino (JCS) moiety, was measured by optical Kerr-gating with a time resolution of 0.35 ps. A special thin Glan polariser in the Kerr shutter allows high contrast without unnecessarily increasing the group delay dispersion. The emission band may thus be gated and observed even with highly fluorescent samples. The spectral dynamics consists of a continuous red-shift and narrowing with similar relaxation behavior throughout, i.e. between these two observables and the three compounds. This suggests that polar solvation is the common cause for spectral relaxation after 0.2 ps. The continuum model describes the dynamic Stokes shift quantitatively. Contrary to previous reports we do not find a temporary isosbestic point in the fluorescence of JCS, nor is there evidence for a dependence on anilino substituents. The crystal structures of DCS and JCS are provided.

相关文献

Diary of conferences and courses

News

DOI: 10.1039/B200391K

Glossary of abbreviations

Other

DOI: 10.1039/JA994090201R

Lead at the roadside

Paper

DOI: 10.1039/A906801E

Book review

2003-07-15 Book Review

DOI: 10.1039/B307797G

Conference report

2004-01-15 Conference Report

DOI: 10.1039/B315010K

Events

Paper

DOI: 10.1039/A906802C

您可能还喜欢

化合物问答

奥美沙坦酯杂质4(CAS号:95579-71-8)的主要用途是什么?

奥美沙坦酯杂质4在药物工业中并无特定用途,主要作为生产和质量控制中的监控指标,以确保产品质量和符合相关规范。它具有一定的化学活性,因此在生产过程中需要严格控制其...

95579-71-84-Chloro-4-methyl-5-...
化合物问答

如何储存C3bot (154-182)(CAS号:1246280-79-4)?

C3bot (154-182)应储存在干燥、阴凉、通风良好的环境中,避免阳光直射。具体储存条件需要参考其相关安全数据表(SDS)中的储存信息。建议使用密闭容器存...

1246280-79-4C3bot (154-182)
化合物问答

在合成中是否有4-吡唑甲酸乙酯(CAS号:37622-90-5)的替代品?

在合成过程中,可以考虑使用类似结构的化合物作为替代品,例如4-吡唑甲酸甲酯或其他吡唑类化合物。这些替代品在性质上相似,可以用于相似的合成反应中,但需根据具体应用...

37622-90-5Ethyl 1H-pyrazole-4-...
化合物问答

(2-溴乙基)三甲基硅烷(CAS号:18156-67-7)的主要用途是什么?

(2-溴乙基)三甲基硅烷主要用作有机合成中的溴代试剂,特别是在硅化学领域中,用于制备硅烷衍生物和硅基功能材料。它也用于表面改性、催化剂合成、医药中间体合成以及分...

18156-67-7(2-Bromoethyl)(trime...
化合物问答

如何处理含有2-(4-broMophenyl)-1,1,1-trifluoropropan-2-ol(CAS号:122243-28-1)的废料?

含该化合物的废料需按照危险废物管理规定进行分类和处理。首先,应尽量减少废料的产生,通过改进生产工艺实现废物最小化。对于不可避免的废料,建议采用安全的收集方法,避...

122243-28-12-(4-bromophenyl)-1,...
化合物问答

什么是1,1,1-三氟-6-苯基-5-(e)-己烯-2,4-二酮(CAS号:18931-64-1)?

1,1,1-三氟-6-苯基-5-(e)-己烯-2,4-二酮是一种有机化合物,化学式为C14H8F3O2。它是一种具有特定立体结构的芳香族化合物,属于酮类。

18931-64-1(5E)-1,1,1-Trifluoro...
化合物问答

2-(2-甲基哌啶-1-基)-2-氧代-乙酸(CAS号:77654-61-6)的主要用途是什么?

2-(2-甲基哌啶-1-基)-2-氧代-乙酸主要用于药物合成、有机合成及作为化学试剂。它在医药领域有一定的应用,可用于合成某些药物中间体。此外,它还用于实验室研...

77654-61-6(2-Methyl-1-piperidi...
化合物问答

如何储存(R)-1-(3-Chlorophenyl)-2,2,2-trifluoroethanamine(CAS号:1213627-66-7)?

应将(R)-1-(3-氯苯基)-2,2,2-三氟乙胺储存在阴凉、干燥、通风良好的地方,远离火源和热源。应使用密封的容器储存,并避免光照。储存温度应控制在室温范围...

1213627-66-7(1R)-1-(3-Chlorophen...
化合物问答

N-亚硝基-N,N-二壬基胺(CAS号:84424-96-4)的市场或研究趋势如何?

N-亚硝基-N,N-二壬基胺目前主要应用于有机合成和药物化学领域。市场趋势显示,随着有机合成技术的进步,该化合物在新药研发中的应用将更加广泛。新兴研究领域包括其...

84424-96-4N-Nitroso-N-nonyl-1-...
化合物问答

5-Chloro-2-methoxy-3-(2,2,2-trifluoroethoxy)pyridine(CAS号:1280786-68-6)的市场或研究趋势如何?

该化合物在医药、农药等领域有潜在应用价值,但市场需求较小。目前研究趋势主要集中在探索其在特定领域的应用潜力,如作为药物合成中的中间体。随着研究的深入,预计未来市...

1280786-68-65-Chloro-2-methoxy-3...

来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

推荐供应商

免责声明
本页面提供的学术期刊信息仅供参考和研究使用。我们与任何期刊出版商均无关联,也不处理投稿事宜。如有投稿相关咨询,请直接联系相关期刊出版商。
如发现页面信息有误,请发送邮件至 support@chemtradehub.com 联系我们。我们将及时核实并处理您的问题。