Fabian, J., Hartmann, H.: Light Absorption of Organic Colorants‐Theoretical Treatment and Empirical Rules. 245 S., 76 Abb., 48 Tab., Berlin‐Heidelberg‐New York: Springer‐Verlag. 1980. (Reactivity and Structure ‐ Concepts in Organic Chemistry 12) Leinen, 148,80 DM

Bäcker, H.

doi:10.1002/prac.19823240223

Cited by 2 publications

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Section: Introductionmentioning

confidence: 99%

“…This value is much higher in dyes compared to other molecules. 4 Consequent to the absorption of light photons, an excitation of the valence electrons on dye molecules happens leading to movement of available electrons to a higher quantum energy state. Since these molecules are energetically unstable, excess energy is expressed by emission of light or heat or even the two simultaneously, endowing them with unique properties for biomedical imaging and therapy.…”

Section: Introductionmentioning

confidence: 99%

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Supramolecular dye nanoassemblies for advanced diagnostics and therapies

Ramezani,

De Smedt,

Sauvage

2024

Bioengineering & Transla Med

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Dyes have conventionally been used in medicine for staining cells, tissues, and organelles. Since these compounds are also known as photosensitizers (PSs) which exhibit photoresponsivity upon photon illumination, there is a high desire towards formulating these molecules into nanoparticles (NPs) to achieve improved delivery efficiency and enhanced stability for novel imaging and therapeutic applications. Furthermore, it has been shown that some of the photophysical properties of these molecules can be altered upon NP formation thereby playing a major role in the outcome of their application. In this review, we primarily focus on introducing dye categories, their formulation strategies and how these strategies affect their photophysical properties in the context of photothermal and non‐photothermal applications. More specifically, the most recent progress showing the potential of dye supramolecular assemblies in modalities such as photoacoustic and fluorescence imaging, photothermal and photodynamic therapies as well as their employment in photoablation as a novel modality will be outlined. Aside from their photophysical activity, we delve shortly into the emerging application of dyes as drug stabilizing agents where these molecules are used together with aggregator molecules to form stable nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supramolecular dye nanoassemblies for advanced diagnostics and therapies

Ramezani,

De Smedt,

Sauvage

2024

Bioengineering & Transla Med

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Calculation of the relative permittivity of Rhodamine 6G using the quantum mechanical method

Riabenko,

Shulga,

Beloshenko

2023

Biophysical Bulletin

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Background: The article describes a method for calculating the permittivity of organic molecules in quantum mechanics using the well-studied Rhodamine 6G molecule as an example. The study of optical properties of large organic molecules requires not only experimental data but also the use of calculations obtained both analytically and numerically. Objectives: Methods for calculating permittivity as phenomenological characteristics of a sample are to be tested on well-studied molecules to be further applied to more complex nonlinear structures. However, the integral changes need to be approximated in the wave functions of large molecules. Material and methods: The numerical simulations in MATLAB were carried out to be compared with the data from Gaussian 09, which are accurate for such small molecules as Rhodamine 6G. MATLAB calculated permittivity values for the frequency domains corresponding to absorption and fluorescence based on the Fermi golden rule. Hence, any molecule can be represented as a composite quantum mechanical system. Meanwhile, Gaussian 09 used the DFT method to determine permittivity. Results: The Fermi golden rule can be applied due to the representation of the molecule as a complex quantum mechanical system. The proposed numerical methods minimize error by using the Dirac delta function. According to our hypothesis, the sum of the wave function of a particle in a potential well and a particle in a ring equals the wave function of the entire system, thus making it possible to study large molecules. As a result of the calculation for two wavelengths of 337 and 573 nm, the permittivity results calculated using the proposed method in MATLAB are 2.98 and 6.27, respectively. Gaussian 09 calculated the same parameters at 2.85 and 6.23. Conclusion: The resulting datasets show a high degree of correlation. Therefore, the research hypothesis has been confirmed. The selected method also proved efficient, hence the enhancement of luminescence can be achieved by changing the relaxation time of the excited state. Plasmonic nanostructures with predetermined properties will controllably enhance the resulting field by the square of the superposition modulus of their near-field. Consequently, conditions for highly coherent radiation with high intensity and polarization can be predicted and calculated before an experiment is carried out.

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Fabian, J., Hartmann, H.: Light Absorption of Organic Colorants‐Theoretical Treatment and Empirical Rules. 245 S., 76 Abb., 48 Tab., Berlin‐Heidelberg‐New York: Springer‐Verlag. 1980. (Reactivity and Structure ‐ Concepts in Organic Chemistry 12) Leinen, 148,80 DM

Cited by 2 publications

References 0 publications

Supramolecular dye nanoassemblies for advanced diagnostics and therapies

Supramolecular dye nanoassemblies for advanced diagnostics and therapies

Calculation of the relative permittivity of Rhodamine 6G using the quantum mechanical method

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