Fluorescence excitation and fluorescence spectra of jet-cooled phenanthridine and 7,8-benzoquinoline

Prochorow, J.; Deperasińska, Irena; Stepanenko, Yuriy

doi:10.1016/j.cplett.2004.10.010

Cited by 13 publications

(22 citation statements)

References 15 publications

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“…This is a shift direction opposite than that observed in the case of BQ molecule, in which the (0,0) origin band of LIF excitation spectrum displays a red shift (toward lower energies) of 102 cm −1 relative to PH molecule [6,8]. Dispersed fluorescence spectrum of PHN excited in its (0,0) origin is very weak (in part, due to the fact that most of its intensity is carried out by the resonant 0-0 radiative transition), and for this reason vibrational structure of the fluorescence spectrum is diffused.…”

Section: Summary Of Experimental Datamentioning

confidence: 52%

“…This in turn calls for the high resolution of vibrational structure of recorded fluorescence spectra. In the present case such condition is secured (to some extent) by the fact that the analysis is carried out for the experimental data which were gathered under conditions of supersonic jet expansion [6]. Figure 2 illustrates results of observations of the laser induced fluorescence (LIF) excitation spectra and dispersed fluorescence spectra of PHN molecules, monitored under conditions of jet-cooling supersonic expansion.…”

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

“…Contrary to the experiments in condensed phases (in liquid solutions, especially) such conditions of isolation of excited molecules, in collision-free expansion, have revealed rather distinct differences between the fluorescence excitation (absorption) and fluorescence spectra of both molecules under study [6]. In a subsequent paper, the results of an ab initio analysis of the vibrational structure of observed fluorescence spectrum of BQ has been presented [7].…”

Section: Introductionmentioning

confidence: 99%

“…3 of Ref. [6], respectively). It is very instructive to see how rich and sharp is the vibrational structure of the LIF excitation spectrum in the whole monitored spectral region in comparison to that recorded in the fluorescence spectrum.…”

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

“…It is very instructive to see how rich and sharp is the vibrational structure of the LIF excitation spectrum in the whole monitored spectral region in comparison to that recorded in the fluorescence spectrum. [6]). The energy of electronic vibrationless origin transition in both spectra is 29391 cm −1 .…”

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

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Fluorescence Spectra of Phenanthridine Isolated in the Supersonic Jet Expansion - An Ab Initio Analysis

2005

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Following the analysis of laser induced fluorescence spectrum of 7,8-benzoquinoline molecule, observed under conditions of isolation in the supersonic jet expansion, the ab initio analysis of laser induced fluorescence spectrum of phenanthridine, observed under the same experimental conditions, was performed. This analysis included: optimization of equilibrium geometry of phenanthridine in its first excited S1 singlet state and computations of the frequencies of vibrational fundamental modes together with their geometry changes between the excited and the ground state. Comparison of the results of calculations with experimental data revealed their good agreement and an increase in the vibrational activity in the fluorescence spectrum in comparison to fluorescence spectrum of phenanthrene molecule (which is a parent aromatic hydrocarbon of phenanthridine and of 7,8-benzoquinoline). Such an increase in vibrational activity in the fluorescence spectrum was earlier observed also for 7,8-benzoquinoline molecule. Present analysis shows that this effect is due to molecular symmetry reduction caused by the substitution of nitrogen atom into the aromatic rings system of phenanthrene, as well as to the changes of equilibrium structure between the ground and excited states.

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Section: Summary Of Experimental Datamentioning

confidence: 52%

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

Section: Analysis Of the Fluorescence Spectrum Of Jet-cooled Phn Molementioning

confidence: 99%

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Fluorescence Spectra of Phenanthridine Isolated in the Supersonic Jet Expansion - An Ab Initio Analysis

2005

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Synthesis, photophysical and acidochromic properties of a series of tetrahydrodibenzo[a,i]phenanthridine chromophores

et al. 2016

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Characterization of Push–Pull-Type Benzo[X]quinoline Derivatives (X = g or f): Environmentally Responsive Fluorescent Dyes with Multiple Functions

et al. 2020

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Benzo[X]quinoline (X = g or f: BQX) derivatives bearing bistrifluoromethyl and amine groups have been designed as push−pull-type fluorescent dyes. Through the synthesis of BQX derivatives from 2,7-diaminonaphthalene, lineartype (BQL) and angular-type (BQA) structural isomers were obtained. X-ray structures of single crystals from six given BQX derivatives revealed that the BQL and BQA series adopt planar-and bowl-shaped structures. In the fluorescence spectra, interestingly, the BQL series emitted in the near-infrared region over 700 nm in polar solvents. Based on the visible absorptions and base properties related to the amine moiety, the ammonia responsiveness was investigated using an ion-exchange reaction by the BQX-HCl salt. By exploiting the environmentally responsive fluorescence probe, cell imaging through confocal laser microscopy was conducted using HeLa and 3T3-L1 cells, emitting specific lipid droplets. The results indicate that BQX derivatives have multiple functions and may be applied in materials chemistry and biochemistry.

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Fluorescence excitation and fluorescence spectra of jet-cooled phenanthridine and 7,8-benzoquinoline

Cited by 13 publications

References 15 publications

Fluorescence Spectra of Phenanthridine Isolated in the Supersonic Jet Expansion - An Ab Initio Analysis

Fluorescence Spectra of Phenanthridine Isolated in the Supersonic Jet Expansion - An Ab Initio Analysis

Synthesis, photophysical and acidochromic properties of a series of tetrahydrodibenzo[a,i]phenanthridine chromophores

Characterization of Push–Pull-Type Benzo[X]quinoline Derivatives (X = g or f): Environmentally Responsive Fluorescent Dyes with Multiple Functions

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