Plasmonic Enhancement of a Photocycloreversion Reaction of a Diarylethene Derivative Using Individually Dispersed Silver Nanoparticles

Nishi, Hidetaka; Asahi, Tsuyoshi; Kobatake, Seiya

doi:10.1002/cphc.201200442

Cited by 12 publications

(28 citation statements)

References 148 publications

(134 reference statements)

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“…The black curve is for the sample with GNRs 1, red curve for GNRs 2, and green curve for GNRs 3 concentration in the dried polymer is calculated to 9 × 10 −2 mol L −1 . Moreover, in other study, the samples were considered as consisting of isolated nanoparticles whether they were in solution [11,26] or deposited on a glass substrate [25]. They never exhibit coupling SPR modes which are present in our case.…”

Section: Resultsmentioning

confidence: 98%

“…In our case, the photochromic reaction induces a modification of the B2629 conformation, changing the local refractive index of the photochromic species surrounding the GNRs. Previous studies already emphasized that coupling photochromic molecules with plasmonic structures could lead to spectral modifications of the SPR modes [11,25]. But all these works deal with spherical nanoparticles, which exhibit only one SPR resonance.…”

Section: Resultsmentioning

confidence: 99%

“…Compared to this present work, the concentration of the photochromic molecules was pretty much higher. Sometimes, the compound was directly grafted on the gold nanoparticles [11,26] or directly deposited by thermal evaporation ensuring a direct interaction of the photochromic molecule and the SPR modes. In our case, the spin-coating deposition process of B2629 in PMMA matrix ensures an average repartition of the photochromic molecule but at low concentration and not in direct interaction with the SPR modes, due to the polymer matrix.…”

Section: Resultsmentioning

confidence: 99%

“…Even if there are fewer published reports, coupling plasmonic nanoparticles with photochromic molecules present many advantages [4,5]. Many different behaviors of this coupling have been observed: it can lead to either (i) a decrease of the photochromic activity [6,7] and even an irreversibility of the photoreaction [8,9], or (ii) an improvement of the photoswitching efficiency [10][11][12]. Two parameters seem to have a great importance to modify this coupling.…”

Section: Introductionmentioning

confidence: 95%

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Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

2015

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In this paper, hybrid samples composed of photochromic film deposited on glass substrates functionalized with gold nanorods were synthesized. Three samples of gold nanorods with different aspect ratios were produced and characterized by electron microscopy and extinction spectroscopy. The rod populations were chosen to have more or less overlap between the two surface plasmon resonance bands and the absorption band of the colored form of the photochromic compounds which is commercially available. Deposition of the nanoparticles on glass substrate exhibits a new surface plasmon resonance coupling band coming from their side-by-side organization. Spectroscopic studies of the photoisomerization process of photochromic film spin-coated on the gold nanorods show reversible interaction between photochromism and plasmonic properties. Despite such coupling has been previously reported emphasizing the main role of the bands overlapping, in this paper, we clearly show that the surface resonance coupling band is the key parameter to monitor the photochromic process. This result emphasizes the importance of coupling nanoparticles to increase their sensing potential and interaction with photochromic molecules.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

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Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

2015

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“…76 manifest the effect of plasmonic enhancement on the photochromic transformations [111]. It was found that the photocycloreversion reaction is enhanced by an order of magnitude under visible light.…”

Section: Scheme 76mentioning

confidence: 94%

Nanophotochromism

Barachevsky¹

2015

Organic Photonics and Photovoltaics

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Abstract:The review presents the state-of-the-art analysis of investigations in the field of a new line of research of photochromism -nanophotochromism. The design, properties, and possible applications of photochromic nanoparticles prepared by different methods with the use of photochromic substances (aggregates, host-guest, and polymer systems, solid nanoparticles) as well as core-shell photochromic nanostructures based on polymers, silica, quantum dots, doped upconversion nanocrystals, and Ag, Au, etc. nanoparticles have been reviewed. Keywords: photochromism; photochromic nanoparticles; core-shell photochromic nanoparticles design; photoswitching; aggregates; polymer systems, host-guest systems IntroductionPhotochromism is a very important phenomenon for different applications in photonics. The applications are based on reversible phototransformations of photochromic compounds between two states and changes of their properties that accompany these transformations At present, systems and materials containing photochromic nanopatricles have become highly significant. Among these are nanodimensional particles of photochromic substances, including aggregates, and coreshell systems. As a core, inorganic nanoparticles of gold, silver, metal oxides, quantum dots (QD), and also polymeric nanoparticles are used. The shell consists of photochromic molecules or their aggregates connected to a core surface either chemically or physically. Photochromic nanoparticles with photocontrolled fluorescence arouse a special interest because the fluorescence technique is becoming a leading strategy in biological diagnosis, imaging, and detection applications. This paper is a state-of-the-art review which presents results of studying photochromic nanoparticles including author's own data. The results of earlier research are also surveyed in some other reviews [1][2][3][4][5][6][7][8][9][10][11][12][13]. Photochromic nanoparticles:properties and applications Nanoparticles based on photochromic substances AggregatesThe most known photochromic nanoparticles are aggregates of photochromic organic compounds [14]. These compounds experience reversible photoinduced transformations between two states, Sch. 1A and Sch. 1B. Scheme 1The photoinduced colored merocyanine form B absorbing visible irradiation is formed from a colorless form A as a result of photodissociation of the -C-O-bond of the pyran heterocycle under UV radiation, and this is followed by spontaneous isomerization of the cis-form to the trans one. The colored form B can be converted back to the initial colorless form A upon absorption of visible light or spontaneously during the dark relaxation, which is accelerated by heating.The J-aggregates of nitro-substituted indoline spiropyrans Sch. 2 with long alkyl substituents are of special interest [15].The narrow absorption bands of J-aggregates of these photochromic compounds (Fig. 1) made it possible prepare a specimen of the multilayered optical disk providing freUnauthenticated Download

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Enhanced Photochromism of Diarylethene Induced by Excitation of Localized Surface Plasmon Resonance on Regular Arrays of Gold Nanoparticles

et al. 2020

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Localized surface plasmon resonance (LSPR) excitation on the photochromic reaction of a diarylethene derivative (DE) was studied by surface enhanced Raman scattering (SERS). UV and visible light irradiations transform reversibly DE between openform (OF) and closed-form (CF) isomers, respectively. A mixture of PMMA and DE (either OF or CF isomer) was spin-coated onto gold nanorods (GNRs) arrays, designed by electron beam lithography, with two localized surface plasmon resonances (LSPR) at distinct wavelengths, due to their anisotropy. The photochromic reaction rates from CF to OF isomers, under LSPR excitation, were monitored from SERS spectral changes under different polarizations, on the same GNR substrate to compare the effect of LSPR field strength. It appears that the photoisomerization rate was faster when LSPR was excited with the polarization parallel to the GNR long axis. The present results highlight a potential genuine mechanism, from near field LSPR excitation, involved in the photochromic enhancement of diarylethene photochromes.

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Plasmonic Enhancement of a Photocycloreversion Reaction of a Diarylethene Derivative Using Individually Dispersed Silver Nanoparticles

Cited by 12 publications

References 148 publications

Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

Nanophotochromism

Enhanced Photochromism of Diarylethene Induced by Excitation of Localized Surface Plasmon Resonance on Regular Arrays of Gold Nanoparticles

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