Clay Mimics Color Tuning in Visual Pigments

Furutani, Yuji; Ido, Kazutomo; Sasaki, Masako; Ogawa, Makoto; Kandori, Hideki

doi:10.1002/anie.200702368

Cited by 21 publications

(14 citation statements)

References 13 publications

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“…Although artifi cial construction of wide color tuning of the Rh chromophore in other materials had been unsuccessful for a long time, we recently found that the protonated Schiff base of 11 -cis retinal exhibits various colors when adsorbed onto the clay montmorillonite. 11 In clays from three different mining regions, the absorption spectra cover the entire visible range (Fig. 14.3 ).…”

Section: The Unique Color Of the Retinal Molecule In Proteinmentioning

confidence: 99%

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Protein‐Controlled Ultrafast Photoisomerization in Rhodopsin and Bacteriorhodopsin

Kandori

2011

Supramolecular Photochemistry

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Section: The Unique Color Of the Retinal Molecule In Proteinmentioning

confidence: 99%

“…This fi gure is reproduced from Furutani et al . 11 clay, and the protonated form is stabilized by negatively charged surfaces. It should be noted that the three clays possess an identical backbone structure, among which substitution of ions in the backbone layers and interlayer cations is different.…”

Section: The Unique Color Of the Retinal Molecule In Proteinmentioning

confidence: 99%

Protein‐Controlled Ultrafast Photoisomerization in Rhodopsin and Bacteriorhodopsin

Kandori

2011

Supramolecular Photochemistry

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“…The efficient isomerization of retinal at 77 K was worth mentioning as a successful mimic of the primary photochemical reaction in rhodopsin. We have reported the formation of a protonated retinal Shiff base in montmorillonite without surfactant modification, while it is difficult to explain the variation of the spectral shift depending on the clay type [63].…”

Section: Electrostatic Interactionsmentioning

confidence: 99%

Inorganic–Organic Interactions

Okada

Ogawa

2017

Nanostructure Science and Technology

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Intercalation of guest species into layered materials is a way of constructing two-dimensionally ordered inorganic-organic molecular or supramolecular or hybrid assembly with unique microstructures controlled by host-guest and guestguest interactions [1][2][3][4][5][6][7][8][9]. One of the most unique characteristics of intercalation chemistry is the expansion of the interlayer space upon intercalation of guest species. The expanded interlayer space by the intercalation can be used to immobilize guest species further, since the space was geometrically and chemically modified to accommodate wider variety of guest species. This 'expandable' 2-dimensional nano-space is useful as a nano-vessel or nano-reaction environment for immobilizing various kinds of molecular functional species.The properties of intercalation compounds are largely affected by the population (or density or distance between adjacent species) of functional units and some useful functions are emerged only when appropriate population (nanostructure) is achieved. The interactions between host and guest have been investigated based on the structural consideration of resulting intercalation compounds (or interlayer microstructures). The characterization includes X-ray and electron diffraction and composition, chemical bonding between host and guest using vibrational spectroscopy, electronic states of the confined guests by electronic spectroscopy, strength of interactions using thermal analyses (desorption and decomposition), and more directly using advanced microscopies.

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“…The difference is worth investigating systematically using similar materials (clay minerals, surfactants and dyes). The adsorption of retinal onto smectites with different origin was examined to find the color development of retinal depends on the nature of clay mineals [40]. The isomerization of the retinal adsorbed on various clay minerals is worth investigating further [40].…”

Section: Insert Figurementioning

confidence: 99%

“…Studies concerning photochromic reactions in solids have significance for practical applications such as optical recording. Accordingly, the interactions of photochromic dyes with layered solids has been investigated so far [30][31][32][33][34][35][36][37][38][39][40][41][42]. These studies have initially been done to characterize the interlayer nanospaces and the host-guest system, and then, to contribute to future practical applications of the intercalation compounds for optical recording and photoresponsive materials.…”

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confidence: 99%