Photochromism and Optical Property of Gold Nanoparticles Covered with Low-Polydispersity Diarylethene Polymers

Nishi, Hidetaka; Kobatake, Seiya

doi:10.1021/ma702882t

Cited by 55 publications

(63 citation statements)

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“…92 were prepared according to the Brust's method for evaluation of the electric field interaction between the Au nanoparticle and photochromic diarylethene moieties [133]. It was found that the photochromic photocyclization reactivity decreases upon shortening of the distance between the Au surface and the diarylethene moiety.…”

Section: Scheme 89mentioning

confidence: 99%

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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Section: Scheme 89mentioning

confidence: 99%

Nanophotochromism

Barachevsky¹

2015

Organic Photonics and Photovoltaics

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“…[8] At a quantum level, the metal-chromophore interface exhibits physico-chemical interactions that involve energy or electron transfer (amongst others) from the photochromic moiety to the plasmonic surface (or vice versa) which may compromise the photo-responsive behaviour of chromophores. [9,10] In particular, this phenomenon has been investigated in diaryethylenes [11,12] and azobenzenes, [13,14] respectively, tailored to transition metal clusters. In this regard, photochromic-plasmonic conjugates have been intriguing scientists over the last few years, although the literature regarding this topic is relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

Gold Tailored Photosensitive Elastin‐like Polymer: Synthesis of Temperature, pH and UV‐vis Sensitive Probes

Álvarez-Rodríguez

Arias

Santos

et al. 2010

Macromol. Rapid Commun.

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Here, we describe a procedure to manufacture smart hybrid probes that exhibit tunable optical properties as a function of multiple environmental variations. Initially, we achieved a one-pot synthesis of gold-PREP (photo-responsive elastin-like polymer) conjugate Gold-AzoGlu15 via reduction of auric acid in the presence of PREP AzoGlu15. Outstandingly, Gold-AzoGlu15 exhibited pH and temperature sensitiveness. However, Gold-AzoGlu15 was not UV-vis sensitive. We noticed that photo-isomerisation of azobenzene moieties in Gold-AzoGlu15 could not be detected by UV-vis spectroscopy. In a subsequent step, we explored the use of cyclodextrins and the formation of alkanethiol mixed-monolayers over mother Gold-AzoGlu15 by thiol-place exchange reactions in order to decouple photo-isomerisation of azobenzene from the bulk phase absorption. In this sense we achieved the synthesis of β-cyclodextrin capped Gold-CD-AzoGlu15. Notable was that cis-trans photo-conversion of azobenzene groups in Gold-CD-AzoGlu15 could be successfully detected. Finally, we present the optical properties exhibited by multi-sensitive probe Gold-CD-AzoGlu15 as a function of pH, temperature and UV-vis irradiation. We think that gold-PREP hybrids could be of great interest in the design of multi-functional chromophore-metal nanocomposites that operate in aqueous media for the development of multi-stimuli sensitive detectors for biosensing applications.

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“…[8][9][10] Although surface immobilization of diarylethene moiety is essential for useful application, only few groups have reported the introduction of diarylethene derivatives into surface molecular layers via covalent bond because of difficulty in synthesis of molecule with surface attachment, linker and diarylethene moieties. [11][12][13][14][15][16][17][18][19][20][21] Recently, we reported a construction of mono-and multi-viologen layers on Si(111) surface, by sequential surface reactions, i.e., layer-by-layer growth, without loosing their electron mediation capability. [22,23] at 80 °C for 20 min.…”

Section: Introductionmentioning

confidence: 99%

Photoswitching of electron transfer property of diarylethene–viologen linked molecular layer constructed on a hydrogen-terminated Si(111) Surface

Masuda¹,

Irie²,

Uosaki³

2009

Thin Solid Films

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An organic monolayer with diarylethene and viologen moieties as a photochromic and an electroactive group, respectively, was constructed on a hydrogen-terminated Si (111) surface by sequential surface reactions. Photoswitching behaviour of electron transfer from the Si electrode to viologen moiety, larger and smaller current after UV and visible irradiation, respectively, was observed. This photoswitching behaviour can be explained by change in molecular conductivity of diarylethene moiety, which separates Si surface and viologen moiety, induced by ring closing and opening UV and visible irradiation, respectively.

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Photochromism and Optical Property of Gold Nanoparticles Covered with Low-Polydispersity Diarylethene Polymers

Cited by 55 publications

References 55 publications

Nanophotochromism

Nanophotochromism

Gold Tailored Photosensitive Elastin‐like Polymer: Synthesis of Temperature, pH and UV‐vis Sensitive Probes

Photoswitching of electron transfer property of diarylethene–viologen linked molecular layer constructed on a hydrogen-terminated Si(111) Surface

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