Contrasting Solvent Polarity Effect on the Photophysical Properties of Two Newly Synthesized Aminostyryl Dyes in the Lower and in the Higher Solvent Polarity Regions

Photodynamic therapy (PDT) is an innovative treatment of malignant or diseased tissues. The effectiveness of PDT depends on light dosimetry, oxygen availability, and properties of the photosensitizer (PS). Depending on the medium, photophysical properties of the PS can change leading to increase or decrease in fluorescence emission and formation of reactive oxygen species (ROS) especially singlet oxygen (1O2). In this study, the influence of solvent polarity, viscosity, concentration, temperature, and pH medium on the photophysical properties of protoporphyrin IX, pyropheophorbide-a, and Photofrin® were investigated by UV-visible absorption, fluorescence emission, singlet oxygen emission, and time-resolved fluorescence spectroscopies.

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Correction: Photophysical properties of the intramolecular excited charge-transfer states of π-expanded styryl phenanthrimidazoles – effect of solvent polarity

RSC Advances ◽

10.1039/c6ra90085b ◽

2016 ◽

Vol 6 (87) ◽

pp. 83709-83709

Author(s):

V. Thanikachalam ◽

A. Arunpandiyan ◽

J. Jayabharathi ◽

P. Ramanathan

Keyword(s):

Charge Transfer ◽

Photophysical Properties ◽

Solvent Polarity ◽

Effect Of Solvent

Correction for ‘Photophysical properties of the intramolecular excited charge-transfer states of π-expanded styryl phenanthrimidazoles – effect of solvent polarity’ by V. Thanikachalam et al., RSC Adv., 2014, 4, 6790–6806.

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Chain-Length-Dependent Photophysical Properties of α,ω-Di(4-pyridyl)polyenes: Effects of Solvent Polarity, Hydrogen Bond Formation, Protonation, and N-Alkylation

Journal of Fluorescence ◽

10.1007/s10895-021-02824-y ◽

2021 ◽

Author(s):

Yoriko Sonoda

Keyword(s):

Hydrogen Bond ◽

Chain Length ◽

Photophysical Properties ◽

Bond Formation ◽

Solvent Polarity ◽

Hydrogen Bond Formation

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Intermolecular effects on intersystem crossing studied on the picosecond timescale: the solvent polarity effect on the rate of singlet-to-triplet intersystem crossing of diphenylcarbene

Journal of the American Chemical Society ◽

10.1021/ja00318a069 ◽

1984 ◽

Vol 106 (6) ◽

pp. 1868-1869 ◽

Cited By ~ 44

Author(s):

E. V. Sitzmann ◽

J. Langan ◽

Kenneth B. Eisenthal

Keyword(s):

Solvent Polarity ◽

Intersystem Crossing ◽

Polarity Effect

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Studies on Photophysical Properties of Mono-carbonyl Curcumin Analogues: Experimental and Theoretical approach

Oriental Journal Of Chemistry ◽

10.13005/ojc/3404059 ◽

2018 ◽

Vol 34 (4) ◽

pp. 2170-2179

Author(s):

Manjula Rayanal ◽

Prasad Pralhad Pujar ◽

Sridhar D

Keyword(s):

Excited State ◽

Ground State ◽

Dipole Moments ◽

Photophysical Properties ◽

Stokes Shift ◽

Solvent Polarity ◽

Frontier Molecular Orbital ◽

Curcumin Analogues ◽

Td Dft ◽

Ground State Dipole Moments

The solvatochromic fluorescence behaviour of mono-carbonyl curcumin analogues has been studied in ten different solvents ranging from non-polar to polar. The solvent effect on the spectral properties of analogues has been discussed. The ground state dipole moments were estimated experimentally by Bilot-Kawski equation which is a function of Stokes shift with the solvent polarity parameters and Guggenheim method and theoretically by TD-DFT studies. The excited state dipole moment was determined using Bilot-Kawski equations. The excited state dipole moments for the two molecules were found to be higher than their corresponding ground state dipole moments. Theoretically Frontier molecular orbital (HOMO/ LUMO) energies were determined by Gaussian 09 W software using TD-DFT.

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Modulation of circularly polarized luminescence through excited-state symmetry breaking and interbranched exciton coupling in helical push–pull organic systems

Chemical Science ◽

10.1039/c9sc05231c ◽

2020 ◽

Vol 11 (2) ◽

pp. 567-576 ◽

Cited By ~ 15

Author(s):

Kais Dhbaibi ◽

Ludovic Favereau ◽

Monika Srebro-Hooper ◽

Cassandre Quinton ◽

Nicolas Vanthuyne ◽

...

Keyword(s):

Excited State ◽

Symmetry Breaking ◽

Luminescence Intensity ◽

Solvent Polarity ◽

Circularly Polarized ◽

Polarity Effect ◽

Exciton Coupling ◽

Organic Systems ◽

Circularly Polarized Luminescence ◽

Polarized Luminescence

Solvent polarity effect on circularly polarized luminescence intensity was assessed in helical push–pull organic systems through excited-state symmetry breaking and interbranched exciton coupling.

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