Effect of polymer chain tacticity on the fluorescence of molecular rotors

Recent studies of polymers in solution and in bulk by energy transfer between two fluorescent labels are reviewed. Such studies are concerned with the equilibrium and dynamics of polymer chain expansion, molecular cluster formation in solution, the miscibility of polymers in bulk, and the interdiffusion of polymer latex particles.

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Ready Access to Molecular Rotors Based on Boron Dipyrromethene Dyes-Coumarin Dyads Featuring Broadband Absorption

Molecules ◽

10.3390/molecules25040781 ◽

2020 ◽

Vol 25 (4) ◽

pp. 781

Author(s):

Ernesto Enríquez-Palacios ◽

Teresa Arbeloa ◽

Jorge Bañuelos ◽

Claudia I. Bautista-Hernández ◽

José G. Becerra-González ◽

...

Keyword(s):

Molecular Rotors ◽

Fluorescence Signal ◽

Access Method ◽

Broadband Absorption ◽

Boron Dipyrromethene ◽

Conformational Freedom ◽

Meso Position ◽

Photophysical Study ◽

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Herein we report on a straightforward access method for boron dipyrromethene dyes (BODIPYs)-coumarin hybrids linked through their respective 8- and 6- positions, with wide functionalization of the coumarin fragment, using salicylaldehyde as a versatile building block. The computationally-assisted photophysical study unveils broadband absorption upon proper functionalization of the coumarin, as well as the key role of the conformational freedom of the coumarin appended at the meso position of the BODIPY. Such free motion almost suppresses the fluorescence signal, but enables us to apply these dyads as molecular rotors to monitor the surrounding microviscosity.

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Mixed matrix membranes with molecular-interaction-driven tunable free volumes for efficient bio-fuel recovery

Journal of Materials Chemistry A ◽

10.1039/c4ta05881j ◽

2015 ◽

Vol 3 (8) ◽

pp. 4510-4521 ◽

Cited By ~ 74

Author(s):

Gongping Liu ◽

Wei-Song Hung ◽

Jie Shen ◽

Qianqian Li ◽

Yun-Hsuan Huang ◽

...

Keyword(s):

Polymer Chain ◽

Molecular Interactions ◽

Molecular Interaction ◽

Chain Conformation ◽

Mixed Matrix Membranes ◽

Mixed Matrix ◽

Polymer Chain Conformation ◽

Matrix Membranes

Molecular interactions were constructed to control polymer chain conformation to fabricate mixed matrix membranes with tunable free volumes, exhibiting simultaneously improved butanol permeability and selectivity.

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