Zur Theorie des Einflusses von Lösungsmitteln auf die Elektronenspektren der Moleküle

Bilot, L.; Kawski, A.

doi:10.1515/zna-1962-0713

Cited by 429 publications

(143 citation statements)

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“…In this case, fluorescence occurs from an equilibrated excited to the ground state Franck-Condon level [19,20]. The effective temperatures T* of the LC, determined using the universal Stepanov relation [21] between the absorption and fluorescence spectra, do not differ from the ambient temperatures T of the solvent [13,[22][23][24][25], According to Bakhshiev et al [26][27][28], the universal Stepanov relation holds only when configurational (to a high degree orientational) equilibrium exists between the excited molecule and the surrounding medium.…”

Section: Discussionmentioning

confidence: 99%

On the Intensity Distribution within Photoluminescence Bands in Rigid and Liquid Solutions

Kawski

Ston

Janić

1983

Zeitschrift Für Naturforschung A

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Section: Discussionmentioning

confidence: 99%

On the Intensity Distribution within Photoluminescence Bands in Rigid and Liquid Solutions

Kawski

Ston

Janić

1983

Zeitschrift Für Naturforschung A

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“…Kawski and others [44][45][46] obtained a simple quantum mechanical second order perturbation theory of absorption (a) and fluorescence (f) band shifts in different solvents of varying permitivity () and refractive index (n) relative to the band position of a solute molecule based on which the following equations are obtained:…”

Section: Theorymentioning

confidence: 99%

Solvent effect on the spectral properties of dipolar laser dyes: Evaluation of ground and excited state dipole moments

Nagachandra¹,

Mannekutla

Amarayya

et al. 2012

Eur. J. Chem.

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“…Several theoretical models have been proposed to describe spectral shifts accompanying changes in solvent polarity [26][27][28][29][30]. These shifts are either due to general solvent effects like changes in dipole moment or refractive index, or to specific solvent effects like hydrogen bonding or formation of internal charge transfer (ICT)/twisted internal charge transfer (TICT) states [31,32].…”

Section: Effect Of Microenvironment On 2ap Lifetime Distributionmentioning

confidence: 99%

Fluorescence intensity decays of 2-aminopurine solutions: Lifetime distribution approach

Bharill

Sarkar

Ballin

et al. 2008

Analytical Biochemistry

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The fluorescent adenine analogue 2-aminopurine (2AP) has been used extensively to monitor conformational changes and macromolecular binding events involving nucleic acids because its fluorescence properties are highly sensitive to changes in chemical environment. Furthermore, site-specific incorporation of 2AP permits local DNA and RNA conformational events to be discriminated from the global structural changes monitored by UV/Vis spectroscopy and circular dichroism. However, while the steady-state fluorescence properties of 2AP have been well defined in diverse settings, interpretation of 2AP fluorescence lifetime parameters has been hampered by the heterogeneous nature of multi-exponential 2AP intensity decays observed across populations of microenvironments. To resolve this problem, we have tested the utility of multi-exponential versus continuous Lorentzian lifetime distribution models to describe fluorescence intensity decays from 2AP in diverse chemical backgrounds and within the context of RNA. Heterogeneity was introduced into 2AP intensity decays by mixing solvents of differing polarities, or by adding quenchers under high viscosity to evaluate the transient effect. Heterogeneity of 2AP fluorescence within the context of a synthetic RNA hairpin was introduced by structural remodeling using a magnesium salt. In each case, except folded RNA which required a bimodal distribution, 2AP lifetime properties were well described by single Lorentzian distribution functions, abrogating the need to introduce additional discrete lifetime subpopulations. Rather, heterogeneity in fluorescence decay processes was accommodated by the breadth of each distribution. This approach also permitted solvent relaxation effects on 2AP emission to be assessed by comparing lifetime distributions at multiple wavelengths. Together, these studies provide a new perspective for the interpretation of 2AP fluorescence lifetime properties, which will further the utility of this Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. HHS Public Access Author Manuscript Author ManuscriptAuthor ManuscriptAuthor Manuscript fluorophore in analyses of the complex and heterogeneous structural microenvironments associated with nucleic acids.

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Zur Theorie des Einflusses von Lösungsmitteln auf die Elektronenspektren der Moleküle

Cited by 429 publications

References 0 publications

On the Intensity Distribution within Photoluminescence Bands in Rigid and Liquid Solutions

On the Intensity Distribution within Photoluminescence Bands in Rigid and Liquid Solutions

Solvent effect on the spectral properties of dipolar laser dyes: Evaluation of ground and excited state dipole moments

Fluorescence intensity decays of 2-aminopurine solutions: Lifetime distribution approach

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