Anthracene-Resorcinol Derived Covalent Organic Framework as Flexible White Light Emitter

Abstract

The ordered modular structure of a covalent organic framework (COF) facilitates the selective incorporation of electronically active segments that can be tuned to function cooperatively. This designability inspires developing COFbased single-source white light emitters, required in nextgeneration solid-state lighting. Here, we present a new anthracene-resorcinol-based COF exhibiting white light emission. The keto−enol tautomers present in the COF give rise to dual emission, which can be tuned by the O-donor and Ndonor solvents. Importantly, when suspended in a solid polymer matrix, this dual emission is retained as both tautomers coexist. A mere 0.32 wt % loading of the COF in poly(methyl methacrylate) (PMMA) gives a solvent-free film with intense white light emission (CIE coordinates (0.35, 0.36)). From steady-state and time-resolved studies, the mechanism of the white light emission has been unambiguously assigned to fluorescence, with the blue emission originating from the π-stacked columns of anthracene, and the mixture of red and green from the keto−enol tautomerized resorcinol units. The study introduces the COF as a new class of readily processable, single-source white light emitter.

Ag Nanoparticles Supported on a Resorcinol‐Phenylenediamine‐Based Covalent Organic Framework for Chemical Fixation of CO2

“…Peaks in the range of δ =110 to 120 ppm have been assigned to the aromatic carbons. Notably, the presence of a peak at δ =182 ppm suggests that the ‐OH groups are tautomerised to keto form in the COF (Figure S2) . Further, the peak at δ =148 ppm is seen due to the imine bond formation in the COF.…”

A Covalent Triazine‐Based Framework Consisting of Donor–Acceptor Dyads for Visible‐Light‐Driven Photocatalytic CO2 Reduction

“…[5] They possess tremendousa dvantages in terms of processability,s ustainability,a nd tunable properties. [6] Because of these unique properties, conjugated microporous polymers have promising applications in phototransistors, [7] photovoltaic devices, [8] and photocatalysts. [6] Because of these unique properties, conjugated microporous polymers have promising applications in phototransistors, [7] photovoltaic devices, [8] and photocatalysts.…”

A Corrole‐Based Covalent Organic Framework Featuring Desymmetrized Topology

“…With a view to optoelectronic properties, 2D COFs are of particular interest due to the favorable electron delocalization on the polymeric backbone, with extended π‐conjugations and layer stacking architectures forming periodic columnar π‐arrays with significant electronic overlap . In this context, with the incorporation of certain photoelectric components into well‐defined 2D COFs, the resultant materials can possess unique features such as photoactivation of molecular oxygen, photoconductivity, white light emission, charge‐carrier transport, and ionic conductivity . Considering the interesting photoactive properties of corrole derivatives and their promising biological applications, we envision that incorporation of corrole moieties into 2D COF would allow for the observation of distinctive optical performance and the potential in tailoring to a specific application.…”