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Your search keyword '"Ando, Naoki"' showing total 6 results
Start Over Author "Ando, Naoki" Publisher royal society of chemistry
6 results on '"Ando, Naoki"'

1. Near-infrared fluorescein dyes containing a tricoordinate boron atom† †Electronic supplementary information (ESI) available: Experimental procedures, spectral data, details of the computational studies, and crystallographic data for BF2 and BF3. CCDC 1913398 and 1913399. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c9sc02314c

Author

Ando, Naoki, Soutome, Hiroki, and Yamaguchi, Shigehiro

Subjects
inorganic chemicals, Chemistry, sense organs, skin and connective tissue diseases
Abstract

Tricoordinate boron imparts near-infrared absorption/emission and unusual multi-stage changes in the photophysical properties to fluorescein dyes., Bora-fluoresceins (BFs), fluorescein analogues containing a tricoordinate boron atom instead of an oxygen atom at the 10-position of the fluorescein skeleton, were synthesized as a new family of fluorescein analogues. The deprotonated BFs exhibited absorption and fluorescence in the near-infrared region, which were significantly red-shifted relative to those of hitherto-known heteroatom-substituted fluorescein analogues on account of the orbital interaction between the tricoordinate boron atom and the fluorescein skeleton. BFs also showed multi-stage changes resulting from a Lewis acid–base equilibrium at the boron center in combination with a Brønsted acid–base equilibrium at the phenolic hydroxy group.

Published
2019

4. Organic phosphorescent polymorphs induced by various halogen bonds with stimuli-responsive single/dual phosphorescence switching.

Author

Liu, Hao, Liu, Wentao, Ando, Naoki, Yamaguchi, Shigehiro, and Zhang, Hongyu

Abstract

Herein, we report the first example of two pure organic polymorphs with stimuli-responsive single/dual phosphorescence transformation. By analyzing the crystal structures and theoretical results, it could be understood that efficient intermolecular interactions could restrict the molecular movements and lock distinct molecular conformations, leading to different phosphorescence behaviors. Besides, single/dual phosphorescence could transform into each other by heating or under solvent vapor conditions. Considering such unique properties, logical sensors (AND gate and OR gate) were built by providing different emission colors as inputs. Our work provides not only important information for understanding the dual RTP mechanism but also unique stimuli-responsive pure organic phosphorescent materials to enrich material fields. [ABSTRACT FROM AUTHOR]

Published
2021
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6. A planarized B-phenyldibenzoborepin: impact of structural constraint on its electronic properties and Lewis acidity.

Author

Ando, Naoki, Kushida, Tomokatsu, and Yamaguchi, Shigehiro

Subjects
*ELECTRIC properties of metals, *LEWIS acidity, *ABSORPTION
Abstract

A B-phenyldibenzo[b,f]borepin planarized with two methylene bridges was synthesized. The structural constraint on the B-phenyl group resulted in a bathochromic shift of the absorption and fluorescence properties as well as enhanced Lewis acidity. A donor–π–acceptor type derivative based on this scaffold exhibited intense fluorescence irrespective of the solvent polarity. [ABSTRACT FROM AUTHOR]

Published
2018
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