Adsorption and absorption behavior of cationic porphyrin on titania and clay nanosheets

Hirade, Yugo; Ishida, Tamao; Shimada, Takahiro; Takagi, Shinsuke

doi:10.1016/j.colsurfa.2021.126747

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…It is conceivable that the change in the spectral shape was caused by the extension of π-conjugated electrons owing to the coplanarization between the anthracene ring and the pyridinium ring. A similar phenomenon has been observed for some molecules on the nanosheet. − …”

Section: Resultssupporting

confidence: 77%

Emission Enhancement of Anthracene Derivative Caused by a Dramatic Molecular Orbital Change on the Nanosheet Surface

Arakawa,

Shimada,

Ishida

et al. 2024

J. Phys. Chem. C

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The emission enhancement phenomenon on clay nanosheets is called surface-fixation-induced emission (S-FIE) and is similar to aggregation-induced emission, which has attracted the attention of many researchers. Both emission enhancement phenomena are primarily caused by the suppression of nonradiative deactivation. In this study, a new S-FIE molecule was synthesized and its basic photochemical behavior was investigated. The emission enhancement of the new molecule on the clay surface was induced by the suppression of nonradiative deactivation and acceleration of radiative deactivation. Density functional theory calculations indicated that the acceleration of radiative deactivation originated from the improvement in the spatial overlap between the two molecular orbitals related to the emission phenomenon and the increase in the Frank−Condon factor.

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Section: Resultssupporting

confidence: 77%

Emission Enhancement of Anthracene Derivative Caused by a Dramatic Molecular Orbital Change on the Nanosheet Surface

Arakawa,

Shimada,

Ishida

et al. 2024

J. Phys. Chem. C

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“…Nontypical amphiphiles include polymers, carbonaceous compounds (carbon nanotubes and graphene), silica, other inorganic and organic–inorganic hybrid materials. Examples of inorganic and organic–inorganic materials are macrocyclic molecules, − dendrimers, , silica, − carbon-based particles, black phosphorus, clay nanosheets, magnetic soft spheres, gold nanoparticles, CdS nanoparticles/quantum dots, , ionic liquids, − diureasil hybrid compounds, , and inorganic nanowires …”

Section: Langmuir and Lb Films Of Nontypical Amphiphilesmentioning

confidence: 99%

The Past and the Future of Langmuir and Langmuir–Blodgett Films

2022

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The Langmuir–Blodgett (LB) technique, through which monolayers are transferred from the air/water interface onto a solid substrate, was the first method to allow for the controlled assembly of organic molecules. With its almost 100 year history, it has been the inspiration for most methods to functionalize surfaces and produce nanocoatings, in addition to serving to explore concepts in molecular electronics and nanoarchitectonics. This paper provides an overview of the history of Langmuir monolayers and LB films, including the potential use in devices and a discussion on why LB films are seldom considered for practical applications today. Emphasis is then given to two areas where these films offer unique opportunities, namely, in mimicking cell membrane models and exploiting nanoarchitectonics concepts to produce sensors, investigate molecular recognitions, and assemble molecular machines. The most promising topics for the short- and long-term prospects of the LB technique are also highlighted.

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