Design and synthesis of triphenylamine-substituted vinyl sulphide and its derivatives for fully transparent-to-black electrochromism.

Herein, we report the design and green synthesis of stereodefined tetrasubstituted alkenes (TPA-V-S, TPA-V-SO, and TPA-V-SO2) bearing a triphenyl amine (TPA) and a sulfenyl or sulfoxide, or sulfone functional group situated in the anti-orientation and two phenyl rings anti to each other. Notably, TPA-V-S exhibited reversible vis-to-NIR electrochromism with a high optical contrast of 70.6%, suitable for transparent-to-black (TTB) smart window applications.

Bimetallic Nanoarchitectonics: Generation of Pt/Co-Based Metallo-Macrocycles for Full-Spectrum Black Electrochromism in Smart Window Technologies.

Modern smart windows that can efficiently regulate solar light and heat in the visible-to-NIR region are essential to reduce the indoor cooling cost for energy-efficient buildings. In this work, we developed a square-shaped bimetallic Pt(II)-Co(II) containing metallo-macrocycle (Pt-Co-TPYN) using a pyridine-terpyridine-based heteroditopic ligand (TPYN) via a stepwise complexation reaction. Structural analysis of Pt-Co-TPYN revealed that π-π stacking and the Pt···Pt interaction promoted self-assembled 2D nanosheets with high surface area and mesoporosity.

Redox-Active Triphenylamine-Triazine Covalent Organic Framework: A High Surface Area Microporous Material for Electrochromism and Electrofluorochromism.

Porous covalent organic frameworks (COFs) offer significant advantages in electrochromic (EC) applications due to their high surface area and porosity, which facilitate faradaic redox-mediated diffusion-controlled processes. However, COFs remain underexplored as EC materials due to challenges such as limited solubility and poor film-forming ability. In this study, we synthesized a redox-active triphenylamine-containing COF (TPA-TCIF) on ITO glass via a solvothermal method tailored for electrochromism and electrofluorochromism.

Co-containing metal-organic framework for high-performance asymmetric supercapacitors with functionalized reduced graphene oxide.

Nowadays, supercapacitors are the most coveted eco-friendly and sustainable next-generation energy storage devices. In this regard, developing supercapacitors with high energy density and power density has always been a challenge for researchers. Herein, we have exploited an electroactive Co-containing metal-organic framework (Co-MOF) using cheap and commercially available starting materials under refluxing conditions and explored its energy storage properties in three- and two-electrode methods.

Side-Chain Modification in Conjugated Polymer Frameworks for the Electrocatalytic Oxygen Evolution Reaction.

Conjugated polymer frameworks (CPFs) have recently sparked tremendous research interest due to their broad potentials in various frontline application areas such as photocatalysis, sensing, gas storage, energy storage, etc. These framework materials, without sidechains or functional groups on their backbone, are generally insoluble in common organic solvents and less solution processable for further device applications. There are few reports on metal-free electrocatalysis, especially oxygen evolution reaction (OER) using CPF.

A terpyridine based hydrogel system for reversible transmissive-to-dark electrochromism and bright-to-quenched electrofluorochromism.

A carboxylic acid-containing terpyridine-based hydrogelator (TPPCA) is synthesized to afford a self-assembly induced TPPCA hydrogel, which was used as an all-in-one electrochrome in electrochromic devices (ECDs) to demonstrate reversible transparent-to-black electrochromism with fast darkening and bleaching time of 8.3 s and 9.5 s, respectively, high photopic coloration efficiency of 65.