Negative Photochromism Based on Molecular Diffusion
between Hydrophilic and Hydrophobic Particles in the Solid State
Version 2 2018-03-13, 16:19
Version 1 2018-03-13, 12:06
Posted on 2018-03-13 - 16:19
A colored hybrid
based on a merocyanine adsorbed in a nanoporous-silica-composed dendritic
fibrous silica was prepared by adsorption onto the nanoporous silica
from a spiropyran solution during UV irradiation (photoinduced adsorption).
The obtained red hybrid thus exhibited negative photochromism by visible-light
irradiation. The hybrid was further combined with an organophilic
clay by a solid-state mixing without using solvent to achieve excellent
reversibility of the color change, which was thought to be achieved
by molecular diffusion through the two materials, where nanoporous
silica and organophilic clay accommodated the colored (merocyanine)
and colorless (photogenerated spiropyran) isomers, respectively.
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Yamaguchi, Tetsuo; Maity, Ayan; Polshettiwar, Vivek; Ogawa, Makoto (2018). Negative Photochromism Based on Molecular Diffusion
between Hydrophilic and Hydrophobic Particles in the Solid State. ACS Publications. Collection. https://doi.org/10.1021/acs.inorgchem.7b03132
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AUTHORS (4)
TY
Tetsuo Yamaguchi
AM
Ayan Maity
VP
Vivek Polshettiwar
MO
Makoto Ogawa