20 research outputs found
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
Efficient Surface Peeling, a Photoinduced Result of Photochromic Diarylethene Crystal by Multistep Light Irradiation
Photomechanical
materials driven by an external light stimulus
have become the focus of much attention. We can operate them in a
noncontact way and remotely. Photoinduced bending, one of the typical
photomechanical behaviors, is often observed in elongated and thinner
crystals, which makes them a promising candidate for a variety of
applications. However, the preparation of crystals appropriate for
bending behavior is difficult because of the complexity of their molecular
structures, preparation conditions, and other factors. Here, an efficient
surface peeling of crystals by multistep light irradiation using diarylethene
crystals is reported. Thin crystals fabricated by this approach make
up less than half the thickness of the original crystals. This shows
the potential for the photocontrol of various photomechanical behaviors
by the same crystal depending on the irradiation conditions
New Reaction Model for O–O Bond Formation and O<sub>2</sub> Evolution Catalyzed by Dinuclear Manganese Complex
A new mechanism of the oxygen evolving reaction catalyzed
by [H<sub>2</sub>OÂ(terpy)ÂMnÂ(μ-O)<sub>2</sub>MnÂ(terpy)ÂOH<sub>2</sub>]<sup>3+</sup> is proposed by using density functional theory.
This proton coupled electron transfer (PCET) model shows reasonable
barriers. Because in experiments excess oxidants (OCl<sup>–</sup> or HSO<sub>5</sub><sup>–</sup>) are required to evolve oxygen
from water, we considered the Mn<sub>2</sub> complex neutralized by
three counterions. Structure optimization made the coordinated OCl<sup>–</sup> withdraw a H<sup>+</sup> from the water ligand and
produces the reaction space for H<sub>2</sub>O<sub>2</sub> formation
with the deprotonated OH<sup>–</sup> ligand. The reaction barrier
for the H<sub>2</sub>O<sub>2</sub> formation from OH<sup>–</sup> and protonated OCl<sup>–</sup> depends significantly on the
system charge and is 14.0 kcal/mol when the system is neutralized.
The H<sub>2</sub>O<sub>2</sub> decomposes to O<sub>2</sub> during
two PCET processes to the Mn<sub>2</sub> complex, both with barriers
lower than 12.0 kcal/mol. In both PCET processes the spin moment of
transferred electrons prefers to be parallel to that of Mn 3d electrons
because of the exchange interaction. This model thus explains how
the triplet O<sub>2</sub> molecule is produced
Simulations of Raman Spectra Using the Fragment Molecular Orbital Method
We developed an approach to calculate
normal Raman activities based
on the fragment molecular orbital method. For this purpose, we derived
the FMO gradient and coupled-perturbed Hartree–Fock equations
in the presence of the static electric field. The accuracy is evaluated
in comparison with full ab initio calculations for a set of closed-shell
and radical systems. We applied the method to calculate Raman and
IR spectra of a polystyrene oligomer and crambin (PDB: 1CRN) and performed an
assignment of peaks based on localized normal modes. The computational
timings demonstrate the efficiency of the method