Wide-Range Spectral Diffusion in Single Mg-Tetraazaporphyrin Molecules in a Polymer Matrix at Cryogenic Temperatures

Savostianov, A. O.; Eremchev, Ivan Yu.; Gorshelev, A. A.; Naumov, Andrei V.; Старухин, А. С.

doi:10.1134/s002136401807007x

Cited by 8 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…30 These properties make Pcs a good choice for single-molecule spectroscopy studies. For instance, Yang et al 31 spectral diffusion, 32 follow the spectral changes for the NH tautomers at cryogenic temperatures, 33 and visualize vibrational normal modes with atomically confined light. 34 They have also been employed in plasmon-enhanced fluorescence spectroscopy.…”

Section: ■ Introductionmentioning

confidence: 99%

“…For instance, Yang et al used zinc Pc molecules to achieve a sub-nanometer resolution in single-molecule photoluminescence imaging. Similarly, porphyrin derivatives have been used to observe spectral diffusion, follow the spectral changes for the NH tautomers at cryogenic temperatures, and visualize vibrational normal modes with atomically confined light . They have also been employed in plasmon-enhanced fluorescence spectroscopy .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring Tautomerization of Single Phthalocyanine Molecules through Modification of Chromophore Photophysics by the Purcell Effect of an Optical Microcavity

et al. 2021

View full text Add to dashboard Cite

Over the years, probing and controlling tautomerization has attracted significant attention because of its fundamental importance in various chemical and biological phenomena. So far, light, force, electrons, and electric field have been employed to alter the tautomerization characteristics in porphyrin and phthalocyanine derivatives. Here, we show that engineering the photophysics of molecules through interaction with the vacuum electromagnetic field in an optical microcavity can be used to control the tautomerization of single phthalocyanine molecules. Compared to the molecules embedded in a polymer matrix in open space, the average fluorescence lifetime inside the resonant microcavity decreases significantly due to the Purcell effect. The decreased lifetime reduces the possibility of a molecule entering into the triplet state, i.e., the photoactive tautomerization channel. As a result, the photoinduced tautomerization in phthalocyanine can be significantly altered. Our results demonstrate that the weak coupling between the excited state of a molecule and the vacuum electromagnetic field via a cavity mode can lead to significant changes in photoreactivity.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring Tautomerization of Single Phthalocyanine Molecules through Modification of Chromophore Photophysics by the Purcell Effect of an Optical Microcavity

et al. 2021

View full text Add to dashboard Cite

show abstract

Concept of a Convex on-Chip Metalens as a Miniature Sensor of Fluorescence of Single Molecules

Shuklin,

Barulina,

Novikov

et al. 2024

Jetp Lett.

View full text Add to dashboard Cite

Fluorescence spectroscopy of single molecules is of fundamental significance to determine a small amount of matter and to study molecular dynamic processes. However, the applications of this method in medicine require new solutions for the miniaturization of a sensor planform. The most promising direction in this area seems to be the development of photonic integrated circuits with a high molecule detection efficiency in a volume of about cubic micron. In this work, a concept of a dielectric metalens on a waveguide, which has a high efficiency of the focusing/collection of radiation from an aqueous solution, has been presented. The structure of the metalens with a numerical aperture of above 1.1 operating in the optical range near the fluorescence maximum of the Alexa Fluor 647 dye has been simulated. After the calculation of the molecule detection efficiency, diffusion autocorrelation functions of Alexa Fluor 647 molecules have been calculated to characterize the possibility of measuring the brightness, as well as the number and dynamics of single molecules in the focal volume of the metalens. This concept provides the foundation for the development of future sensors of single molecules as biomedical and environment screening tools.

show abstract

Configuration Resonance and Generation Rate of Surface Plasmon Polaritons Excited by Semiconductor Quantum Dots near a Metal Surface

2019

View full text Add to dashboard Cite

Wide-Range Spectral Diffusion in Single Mg-Tetraazaporphyrin Molecules in a Polymer Matrix at Cryogenic Temperatures

Cited by 8 publications

References 25 publications

Tailoring Tautomerization of Single Phthalocyanine Molecules through Modification of Chromophore Photophysics by the Purcell Effect of an Optical Microcavity

Tailoring Tautomerization of Single Phthalocyanine Molecules through Modification of Chromophore Photophysics by the Purcell Effect of an Optical Microcavity

Concept of a Convex on-Chip Metalens as a Miniature Sensor of Fluorescence of Single Molecules

Configuration Resonance and Generation Rate of Surface Plasmon Polaritons Excited by Semiconductor Quantum Dots near a Metal Surface

Contact Info

Product

Resources

About