Coordinative-to-covalent transformation, isomerization dynamics, and logic gate application of dithienylethene based photochromic cages.

Chemical Science
Jian-Hua ZhangCheng-Yong Su

Abstract

Photochromic coordinative cages containing dynamic C[double bond, length as m-dash]N imine bonds are assembled from a dithienylethene-based aldehyde and tris-amine precursors via metallo-component self-assembly. The resulting metal-templated cages are then reduced and demetalated into pure covalent-organic cages (COCs), which are otherwise difficult to prepare via de novo organic synthesis. Both the obtained coordinative and covalent cages can be readily interconverted between the ring-open (o-isomer) and one-lateral ring-closed (c-isomer) forms by UV/vis light irradiation, demonstrating distinct absorption, luminescence and photoisomerization dynamics. Specifically, the ring-closed c-COCs show a blue-shifted absorption band compared with analogous metal-templated cages, which can be applied in photoluminescence (PL) color-tuning of upconversion materials in different ways, showing potential for constructing multi-readout logic gate systems.

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Citations

May 6, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Kai ChengQing-Fu Sun

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Methods Mentioned

BETA
X-ray
single-crystal diffraction
the
NMR

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