Effect of ms-substitution on aggregation behavior and spectroscopic properties of BODIPY dyes in aqueous solution, Langmuir-Schaefer and poly(methyl methacrylate) thin films

Antina, L. A.; Ksenofontov, Alexander A.; Kazak, A. V.; Усольцева, Н. В.; Антина, Е. В.; Березин, М. Б.

doi:10.1016/j.colsurfa.2021.126449

Cited by 18 publications

(12 citation statements)

References 65 publications

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“…[15] [16] Concentration control was found to influence emission wavelengths of composite systems in OLED emitters, [17] it was also recently shown how structure alterations actually may change steady-state aggregation patterns in thin films. [18] Even though latter publications are dealing with external aggregation facilitation by compression on an air-water interface, synthetic approach to control of aggregate properties is still in emphasis. Switch from this paradigm is complicated while there is lack of systematic investigations of agggregation effects and known direct means to control them.…”

Section: Introductionmentioning

confidence: 99%

Variety of steady and excited state interactions in BODIPY aggregates: Photophysics in antisolvent systems and floating layers

Usoltsev

Raitman

Shokurov

et al. 2023

Journal of Molecular Liquids

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Section: Introductionmentioning

confidence: 99%

Variety of steady and excited state interactions in BODIPY aggregates: Photophysics in antisolvent systems and floating layers

Usoltsev

Raitman

Shokurov

et al. 2023

Journal of Molecular Liquids

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“…Interestingly, a small but significant difference in the absorption spectrum of the self-assembled structures is found under VSC. It is well known in the literature that the different types of aggregate packing result in a change in electronic absorption and emission properties in such conjugated molecules. , Thus, we also checked the fluorescence of the different samples under on-resonance and off-resonance conditions and compared it with the emission spectrum of the monomer (Figure B,D). As can be seen, VSC induces drastic changes in the fluorescence spectrum of PE2, confirming that the self-assembled structure has different packing under strong coupling.…”

mentioning

confidence: 99%

Manipulating the Self-Assembly of Phenyleneethynylenes under Vibrational Strong Coupling

Sandeep

Joseph

Gautier

et al. 2022

J. Phys. Chem. Lett.

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The chemical and physical properties of molecules and materials are known to be modified significantly under vibrational strong coupling (VSC). In order to gain insight into the effects of VSC on − interactions involved in molecular self-assembly, themselves sensitive to vacuum electromagnetic field fluctuations, the aggregation of two structural isomers (linear and V-shaped) of phenyleneethynylene under cooperative coupling was investigated. By coupling the aromatic C=C stretching band, the assembly of one of the molecules results in the formation of spheres as opposed to flakes under normal conditions. As a consequence, the electronic absorption and emission spectra of the self-assembled structures are also modified significantly. The VSC induced changes depend not only on the type of vibration that is coupled but also on the symmetry of the phenyleneethynylene isomer. These results confirm that VSC can be used to drive molecular assemblies to new structural minima and thereby provide a new tool for supramolecular chemistry.

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“…The spectral broadening is caused by the heterogeneous intermolecular interactions, as demonstrated in porphyrin containing surface mounted metal organic frameworks (SURMOFs). , The presence of nanoaggregates (exhibited by SEM images, Figure a, b) leads only to a red-shift of the absorption band. This red-shift indicates that the nanoaggregates are J-type. − The absorption spectrum (Figure S2) has an apparent tail between 550 and 800 nm. There are several reasons responsible for this.…”

Section: Resultsmentioning

confidence: 99%

“…The prominent red-shift and broadening of the S 1 absorption are caused by J-aggregation and inhomogeneous broadening. The difference of the red-shift between the amorphous and crystalline films suggests the presence of extended nanoaggregates with a range of comparable states. − ,, The discrepancy between the absorption and excitation spectra in the wavelength range of 410–575 nm indicates that excitons’ relaxation is bypassing the fluorescence emissive state S 1 . The emission band is at 557 nm, and the fluorescence quantum yield Φ fl of the PhBDP crystalline film is measured to be 0.01.…”

Section: Resultsmentioning

confidence: 99%

Singlet Fission from Upper Excited States of Bodipy Crystalline Film and Single Crystal

Zhou

et al. 2022

J. Phys. Chem. C

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The well-known boron-dipyrromethene (bodipy) dyes have excellent photophysical and photochemical properties, which are significant for practical use in many fields. meso-Phenyl-substituted bodipy (PhBDP) as one of the most classical bodipy derivatives was investigated in the forms of amorphous film, crystalline film, and single crystal by using time-resolved fluorescence and femtosecond transient absorption techniques. The fluorescence of both PhBDP films is strongly quenched because of Jaggregation, which is randomly distributed in the amorphous film but well arranged in the crystalline film. In the crystalline film, the triplet states were populated from the upper excited singlet states (3.54 eV) of the nanoaggregates via singlet fission (SF) within 30 fs. Moreover, SF was also detected after excitation of the lower singlet states (2.58 eV) which are below the SF threshold (3.28 eV). This phenomenon was explained in terms of two-quantum absorption. However, in the amorphous film, the SF process was not observed, indicating the crucial impact of the nanoaggregate morphology on the formation of SF. In the single crystal, SF was also generated owing to the molecular slip-stacked packing which is optimal for the delocalization of excitation. It facilitates exciton fission and energy transfer between the neighboring PhBDP dimer moieties as well. Our findings of PhBDP solids provide a significant theoretical and experimental basis for exploring new SF systems. The prominent quenching, efficient SF, and well-characterized energy transfer of PhBDP solid expands the applications of PhBDP-based organic materials in optoelectronic devices.

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Effect of ms-substitution on aggregation behavior and spectroscopic properties of BODIPY dyes in aqueous solution, Langmuir-Schaefer and poly(methyl methacrylate) thin films

Cited by 18 publications

References 65 publications

Variety of steady and excited state interactions in BODIPY aggregates: Photophysics in antisolvent systems and floating layers

Variety of steady and excited state interactions in BODIPY aggregates: Photophysics in antisolvent systems and floating layers

Manipulating the Self-Assembly of Phenyleneethynylenes under Vibrational Strong Coupling

Singlet Fission from Upper Excited States of Bodipy Crystalline Film and Single Crystal

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