Optical limiting and nonlinear optical absorption properties of C60–polystyrene star polymer films: C60 concentration dependence

Venturini, J.; Koudoumas, E.; Couris, Stelios; Janot, Jean‐Marc; Seta, P.; Mathis, C.; Leach, Sydney

doi:10.1039/b201308h

Cited by 68 publications

(41 citation statements)

References 46 publications

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“…The design rationale is that C 60 undergoes efficient ISC upon photoexcitation (the triplet excited state quantum yield is close to unity). [24][25][26] As a result, the fluorescence quantum yield of C 60 is extremely weak. [24] However, C 60 itself is not an ideal triplet photosensitizer because it has very weak absorption in the visible range.…”

Section: Introductionmentioning

confidence: 98%

Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Huang

Zhao

et al. 2012

Asian J Org Chem

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C60‐boron dipyrromethene (BODIPY) dyads (C‐1 and C‐2) were prepared as heavy‐atom‐free organic triplet photosensitizers for triplet‐triplet annihilation (TTA) based upconversion. BODIPY‐C≡C‐triphenylamine chromophores were used as the light‐harvesting antennas and C60 was used as the singlet energy acceptor and the spin convertor to facilitate the intersystem crossing (ISC) of the dyads from the singlet excited state to the triplet excited state. The C60 dyads strongly absorb visible light (molar extinction coefficients of up to 118800 M−1 cm−1 at 539 nm) and have a long‐lived triplet excited state (τT=32.3 μs). The photophysical properties of the C60‐dyads were studied with steady‐state and time‐resolved spectroscopy. Photoexcitation of the dyad with visible light produces firstly the singlet excited state of the antenna, then the singlet excited state of the C60 unit through intramolecular energy transfer. In turn, the triplet excited state of the C60 unit will be populated because of the intrinsic ISC property of C60. As a proof of concept, the dyads were used as heavy‐atom‐free organic triplet photosensitizers for TTA‐based upconversion.

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Section: Introductionmentioning

confidence: 98%

Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Huang

Zhao

et al. 2012

Asian J Org Chem

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“…3 The attachment of the fullerene onto the polymer chains results in attractive properties. 6,12,13 For instance, Kojima et al found that an incorporation of fullerene grafts onto polystyrene greatly improved the optical limiting property of polystyrene.…”

Section: Introductionmentioning

confidence: 98%

Synthesis and characterization of fullerene grafted poly(ε‐caprolactone)

Kai

Lee

Dong

et al. 2007

J of Applied Polymer Sci

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The fullerene grafted poly(e-caprolactone) (PCL) was successfully synthesized with a graft efficiency of 80%. The fullerene moieties grafted onto the PCL chain aggregate into 1-2 lm particles so that a physical pseudonetwork is formed. Because of the existence of the network structure, the fullerene grafted PCL film can retain its shape at much higher temperatures than that of pure PCL film, as observed in dynamic mechanical tests. It shows a hydrophobic gelling behavior in chloroform solution.

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“…[1,2] During the last decade there was created a variety of molecular objects with fullerene C 60 branching centre by means of variation of chemical composition, functionality and structure of centre, i.e. by using polar and non-polar arms, single or double fullerene core with short or long link between fullerenes.…”

Section: Introductionmentioning

confidence: 99%

“…by using polar and non-polar arms, single or double fullerene core with short or long link between fullerenes. [3][4][5] The progress in molecular design of fullerene-containing macromolecules serves to the aim of creation of various nano-materials for non-linear laser optics (photonics), [1,2] gas(liquid)-separating and effective proton-conducting highly selective membranes, [6] electroluminescent devices [7] etc. Obviously, a directed synthesis of multifunctional macromolecules cannot be realized without monitoring the polymerization and the examination of obtained polymers by fine structural methods such as X-ray and small-angle neutron scattering.…”

Section: Introductionmentioning

confidence: 99%

Neutron Scattering Studies of Structure and Self‐Assembly of Star‐Shaped Polymers with Fullerene Centres in Solutions

Лебедев

Виноградова

Török

2010

Macromolecular Symposia

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Summary: Protonated star-shaped polystyrenes with single and double fullerene C 60 core and the hybrid stars with pairs of polar and non-polar arms (tertbuthylmetacrylate, polystyrene) have been studied in deuterated toluene (20 8C) by small-angle neutron scattering at low and moderate polymer concentrations (c 1 $ 1 g/dl, c 2 $ 3-6 g/dl) to evaluate the peculiarities of fullerene centre action on polymers selfassembly in solutions. As we found, the cores composed of two fullerenes, linked via Si(CH 3 ) 2 -bridge, induce stars' anisotropic interactions and association into chain-like structures (correlation radius $400-600 nm). Meanwhile, the single-core stars of polystyrene and hybrids organize globular clusters (size $ 10 3 nm) those geometry do not change significantly by polymer content variation.

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Optical limiting and nonlinear optical absorption properties of C60–polystyrene star polymer films: C60 concentration dependence

Cited by 68 publications

References 46 publications

Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Synthesis and characterization of fullerene grafted poly(ε‐caprolactone)

Neutron Scattering Studies of Structure and Self‐Assembly of Star‐Shaped Polymers with Fullerene Centres in Solutions

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Optical limiting and nonlinear optical absorption properties of C60–polystyrene star polymer films: C60 concentration dependence

Cited by 68 publications

References 46 publications

Visible‐Light‐Harvesting Triphenylamine Ethynyl C60‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Visible‐Light‐Harvesting Triphenylamine Ethynyl C60‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Synthesis and characterization of fullerene grafted poly(ε‐caprolactone)

Neutron Scattering Studies of Structure and Self‐Assembly of Star‐Shaped Polymers with Fullerene Centres in Solutions

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Product

Resources

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Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion

Visible‐Light‐Harvesting Triphenylamine Ethynyl C₆₀‐BODIPY Dyads as Heavy‐Atom‐Free Organic Triplet Photosensitizers for Triplet‐Triplet Annihilation Upconversion