Molecular Simulation of Excimer Fluorescence in Polystyrene and Poly(vinylcarbazole)
نویسندگان
چکیده
منابع مشابه
Molecular simulation of excimer fluorescence in polystyrene and poly(vinylcarbazole).
In fluorescence emission spectra of poly(vinylcarbazole) (PVK), two types of excimers are observed, the fully and the partially overlapped excimers, namely, excimers and exciplexes. In this work, we investigated the structural changes induced by the transition between electronic levels S(0) and S(1). Furthermore, the widely used assumption of similar potential energy surfaces in the S(0) and S(...
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Monodisperse polystyrene nanospheres with a mean diameter of 102 nm are photofragmented with 193 nm light in N2 at laser fluences from 1 to 20 J/cm2. Carbon atom fluorescence at 248 nm from the disintegration of the particles is used as a signature of the polystyrene. The normalized fluorescence signals are self-similar with an exponential decay lifetime of approximately 10 ns. At fluences abov...
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گل محمدی (r. damascena mill.)مهمترین گونه ای است که در تولید گلاب، عطر و اسانس، در صنعت عطرسازی و دارویی کاربرد دارد. با وجود اهمیت عطر گل محمدی، پژوهش های مولکولی و بیوشیمیایی عطر گل این گونه هنوز در مراحل ابتدایی است. در این پژوهش، ویژگی های مولکولی و فیزیولوژیکی تولید عطر در گل محمدی در آزمایش های مختلف مورد بررسی قرار گرفتند. در آزمایش اول، پژوهشی به منظور بررسی تنوع شیمیایی اسانس میان 44 ت...
simulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
Excimer fluorescence of dinucleotides, polynucleotides, and DNA.
The ultraviolet-absorption spectrum of DNA closely resembles that of a mixture of its constituent nucleotidesl apart from the well-known hypochromism.2' I On the other hand, the emission spectra of DNA and its constituent nucleotides are qualitatively different. The phosphorescence from the excited triplet state of DNA has been shown4' to originate from thymine residues which after excitation h...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2006
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp056987e