Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films

Ono, Tomonori; Kawasaki, K.; Tanaka, Keiji; Nagamura, Toshihiko

doi:10.1016/j.polymer.2017.02.051

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…For example, the N , N ′-dimethyl ExV with the p -phenylene spacer shows strong fluorescence, while N , N ′-dimethyl-4,4′-bipyridinium (methyl viologen) fluoresces very weakly . ExVs have been used to construct cyclophanes (ExBoxes) and polymers with interesting host–guest chemistry, redox activity, and photophysical properties. − However, in contrast with the wide photochromic studies on organic and hybrid compounds derived from the prototypical viologen unit, photochromism of ExV derivatives is seldom reported, and ExV-functionalized metal–organic coordination materials remain unexplored. We envision that the incorporation of ExVs not only can lead to new photochromic hybrid materials but also can allow for coupling of photochromism with fluorescence properties.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks with Extended Viologen Units: Metal-Dependent Photochromism, Photomodulable Fluorescence, and Sensing Properties

Zhou

Yang

et al. 2018

Crystal Growth & Design

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The photoresponsive viologen unit has been widely used to endow metal–organic materials with photochromic and other photomodulable properties. Herein we report the first examples of the metal–organic materials functionalized by extended viologens (ExVs), of general formula [ML]·2H2O (M = Zn for 1, M = Mn for 2, M = Co for 3, and L is a tetracarboxylate ligand with the p-phenylene-extended viologen spacer). Of the three isomorphic metal–organic frameworks, only 1 is photochromic owing to formation of extended viologen radicals through photoinduced electron transfer (PET). The incapability of 2 and 3 to undergo photochromism can be ascribed to longer intermolecular donor–acceptor contacts, emphasizing the sensitivity of solid-state PET to structural changes. 1 also shows strong fluorescence owing to interligand charge transfer, and the fluorescence can be reversibly modulated and switched on/off in the photochromic process. Furthermore, 1 shows excellent hydrolytic stability and can be used as a sensitive, selective, and recyclable fluorescence sensor for detecting Fe3+ in water. The results demonstrated the great potential of extended viologens as functional units for the design of novel responsive metal–organic materials.

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Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks with Extended Viologen Units: Metal-Dependent Photochromism, Photomodulable Fluorescence, and Sensing Properties

Zhou

Yang

et al. 2018

Crystal Growth & Design

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Pseudorotaxane Ligand‐Induced Formation of Copper(I) Iodide Cluster Based Assembly Materials: From Zero to Three Dimensional

Zhao

et al. 2023

Chin. J. Chem.

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Comprehensive SummaryIn this work, we have successfully obtained a series of novel copper(I)–iodide clusters (CuI NCs) based assembly materials by combining supramolecular pseudorotaxane ligands {[Mebpe+]PF6–@CB[6] (CB[6] = cucurbit[6]uril), L’·PF6} and linkers {BPHF@CB[6], [BPHF = C14H20N4(PF6)2], L·PF6}, including discrete cluster CuI 1 and extended cluster organic frameworks MORF 1 and MORF 2. CuI 1 can be described as a dumbbell‐shaped molecule with its body‐centered site and two vertexes respectively occupied by one [Cu5I6]– cluster and two CB[6] held together by two L’·PF6 ligands. The crystal structures of MORF 1 and MORF 2 are 1D anionic chain and four‐fold interpenetrated 3D cationic diamondoid structure, respectively, which all featured intriguing alternating CB[6] and CuI NCs. Furthermore, CuI 1 exhibits outstanding thermochromic and piezochromic luminescence. MORF 1 and MORF 2 also are detected pressure dependent luminescence properties with an enormous blue‐shift of the near‐infrared (NIR) emission band under high pressure compression. These exciting and smart materials possess great potential in the application field of novel temperature and pressure sensors.

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Fluorescence Quenching by Redox Molecular Pumping

David

Zhang

et al. 2022

J. Am. Chem. Soc.

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Artificial molecular pumps (AMPs), inspired by the active cellular transport exhibited in biological systems, enable cargoes to undergo unidirectional motion, courtesy of molecular ratchet mechanisms in the presence of energy sources. Significant progress has been achieved, using alternatively radical interactions and Coulombic repulsive forces to create working AMPs. In an attempt to widen the range of these AMPs, we have explored the effect of molecular pumping on the photophysical properties of a collecting chain on a dumbbell incorporating a centrally located pyrene fluorophore and two terminal pumping cassettes. The AMP discussed here sequesters two tetracationic cyclophanes from the solution, generating a [3]rotaxane in which the fluorescence of the dumbbell is quenched. The research reported in this Article demonstrates that the use of pumping cassettes allows us to generate the [3]rotaxane in which the photophysical properties of fluorophores can be modified in a manner that cannot be achieved with a mixture of the dumbbell and ring components of the rotaxane on account of their weak binding in solution.

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Ultrafast photoresponsive materials for all-optical light modulation by polymer thin films

Cited by 3 publications

References 33 publications

Metal–Organic Frameworks with Extended Viologen Units: Metal-Dependent Photochromism, Photomodulable Fluorescence, and Sensing Properties

Metal–Organic Frameworks with Extended Viologen Units: Metal-Dependent Photochromism, Photomodulable Fluorescence, and Sensing Properties

Pseudorotaxane Ligand‐Induced Formation of Copper(I) Iodide Cluster Based Assembly Materials: From Zero to Three Dimensional

Fluorescence Quenching by Redox Molecular Pumping

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