Insight into Water-Soluble Highly Fluorescent Low-Dimensional Host–Guest Supramolecular Polymers: Structure and Energy-Transfer Dynamics Revealed by Polarized Fluorescence Spectroscopy

Nandajan, Paramjyothi C.; Kim, Hyeongju; Casado, Santos; Park, Soo Young; Gierschner, Johannes

doi:10.1021/acs.jpclett.8b01562

Cited by 15 publications

(17 citation statements)

References 73 publications

(150 reference statements)

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“…Further insights on the cascade energy transfer could be obtained from time‐resolved anisotropy studies (Figure 4 g–i). In general, the loss of anisotropy of organized donors within an assembly occurs either through rotational motion or energy migration [16, 30] . In n ‐decane, depolarization through rotational motion is less favored as spontaneous nucleation assists the formation of 2D assemblies and hence energy migration can be the possible pathway for depolarization [16, 30] .…”

Section: Resultsmentioning

confidence: 99%

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

et al. 2021

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Excited state properties such as emission, exciton transport, electron transfer, etc., are strongly dependent on the shape, size and molecular arrangement of chromophore based supramolecular architectures. Herein, we demonstrate creation and control of distinct supramolecular energy landscapes for the reversible control of the excited‐state emission processes through cascade energy transfer in chromophore assemblies, facilitated by an unprecedented solvent effect. In methylcyclohexane, a tailor‐made Y‐shaped BODIPY derivative self‐assembles to form an unusual spherical architecture of 400–1200 nm size, which exhibits a single emission at 540 nm upon 475 nm excitation through a normal excitation deactivation process. However, in n‐decane, the same BODIPY derivative forms two‐dimensional supramolecular sheets, exhibiting multiple emission peaks at 540, 610, 650, 725 and 790 nm with 475 nm excitation due to cascade energy transfer. Further control on the morphology and excitation energy transfer is possible with variable solvent composition and ultrasound stimulation, resulting in enhanced near‐infrared emission with an overall pseudo Stokes shift of 7105 cm−1.

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Section: Resultsmentioning

confidence: 99%

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

et al. 2021

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“…This was early realized, [ 15 ] and viscosity studies have indeed demonstrated a significant effect on excited state deactivation of various dyes, [ 20,58 ] stilbene, [ 59 ] and TPE compounds; [ 61–63 ] for structures, see Scheme 1. Thus, in rigid matrixes, as for instance in supramolecular host–guest systems, [ 46–49,68–70 ] stilbenoid compounds become highly luminescent. Therefore, a useful way to distinguish between intramolecular and intermolecular contributions to SLE is the use of solid solutions, e.g., by embedding molecules in polymethylmethacrylate (PMMA; at very low dilutions), as it was done, e.g., for DCS compounds.…”

Section: Molecular Luminescence—intramolecular Processes and Environmental Controlmentioning

confidence: 99%

Luminescence in Crystalline Organic Materials: From Molecules to Molecular Solids

Gierschner

Shi

Milián‐Medina

et al. 2021

Advanced Optical Materials

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174

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Luminescent small, all‐organic molecules are of tremendous interest in materials and life science applications. Nevertheless, targeted design requires a basic understanding of the excited state deactivation pathways of the molecules themselves, and the modulations of the processes that occur in the solid state. This particularly concerns crystalline molecular solids, as here not only solid‐state rigidification contributes to these modulations, but specific intermolecular interactions as well. Starting from the molecular properties, this work carefully disentangles all intramolecular and intermolecular factors to the radiative and nonradiative processes in crystalline all‐organic molecular solids to provide guidelines for targeted molecular materials design.

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“…[16,30] In n-decane,d epolarization through rotational motion is less favored as spontaneous nucleation assists the formation of 2D assemblies and hence energy migration can be the possible pathway for depolarization. [16,30] At 3 10 À4 M, 1 in n-decane exhibited an initial anisotropy value (r 0 )of0.25 and reached the plateau region (r 1 )at0.13 by losing the anisotropy with ad ecay time, t r = 45 ps (Figure 4h). The r 0 value of 0.25 at around zero time indicates that the initial orientation of the transition dipole moments has an angle of 308 8.…”

Section: Chemiementioning

confidence: 99%

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

et al. 2021

View full text Add to dashboard Cite

Excited state properties such as emission, exciton transport, electron transfer,etc.,are strongly dependent on the shape,sizeand molecular arrangement of chromophore based supramolecular architectures.Herein, we demonstrate creation and control of distinct supramolecular energy landscapes for the reversible control of the excited-state emission processes through cascade energy transfer in chromophore assemblies, facilitated by an unprecedented solvent effect. In methylcyclohexane,atailor-made Y-shaped BODIPY derivative selfassembles to form an unusual spherical architecture of 400-1200 nm size, whichexhibits asingle emission at 540 nm upon 475 nm excitation through an ormal excitation deactivation process.H owever,i nn-decane,t he same BODIPY derivative forms two-dimensional supramolecular sheets,exhibiting multiple emission peaks at 540, 610, 650, 725 and 790 nm with 475 nm excitation due to cascade energy transfer.F urther control on the morphology and excitation energy transfer is possible with variable solvent composition and ultrasound stimulation, resulting in enhanced near-infrared emission with an overall pseudo Stokes shift of 7105 cm À1 .

show abstract

Insight into Water-Soluble Highly Fluorescent Low-Dimensional Host–Guest Supramolecular Polymers: Structure and Energy-Transfer Dynamics Revealed by Polarized Fluorescence Spectroscopy

Cited by 15 publications

References 73 publications

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

Luminescence in Crystalline Organic Materials: From Molecules to Molecular Solids

Tweaking a BODIPY Spherical Self‐Assembly to 2D Supramolecular Polymers Facilitates Excited‐State Cascade Energy Transfer

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