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Azobenzene-functionalized polymers by ring-opening metathesis polymerization for high dielectric and energy storage …

Block copolymers with push–pull azobenzene pendants were synthesized by ring-opening metathesis polymerization, and could self-assemble into core–shell nanostructures with high dipolar and interfacial polarizations, which were contributed by the strong polarity of azobenzene pendants bearing both electron-do

A High Energy Density Azobenzene/Graphene Oxide Hybrid with …

Due to the high grafting density of AZO moiety and the low mass of the novel structure, the hybrid is a potential solar thermal storage material with high energy …

Photoliquefiable Azobenzene Surfactants toward Solar Thermal Fuels that Upgrade Photon Energy Storage …

While, the azobenzene-based PPCMs exhibit a contradiction between gravimetric energy storage density and photoinduced phase change. Here, a type of azobenzene surfactants with balance between molecular free volume and intermolecular interaction is designed in molecular level, which can address the coharvest of photon …

Covalent functionalization of graphene by azobenzene …

Reduced graphene oxide-azobenzene (RGO-AZO) hybrids were prepared via covalent functionalization for long-term solar thermal storage. Thermal barrier (ΔE a) of cis to tran reversion and …

Understanding and engineering azobenzene for thermal energy storage …

In chapter 4, new diacetylene derivatives with azobenzene moieties and with varied alkyl spacers and linkers were synthesized to show photocontrolled self-assembly and disassembly of photon energy storage materials. This azobenzene decorated diacetylenes

Site Selectivity of Peptoids as Azobenzene Scaffold for Molecular Solar Thermal Energy Storage …

Storing solar energy is a key challenge in modern science. MOlecular Solar Thermal (MOST) systems, in particular those based on azobenzene switches, have received great interest in the last decades. The energy storage properties of azobenzene (t 1/2 <4 days; ΔH~270 kJ/kg) must be improved for future applications. ...

Photoresponse and electrochemical behaviour of azobenzene anchored graphene oxide for energy storage …

Using single azobenzene compounds for this closed energy storage system shows poor storage capacity, power density, and short-time storage. To overcome this, functionalization of the carbon materials with azobenzene compounds is …

Site Selectivity of Peptoids as Azobenzene Scaffold for Molecular Solar Thermal Energy Storage …

The energy storage properties of azobenzene (t1/2 < 4 days; DH~270 kJ/kg) must be improved for fut … <p>Storing solar energy is a key challenge in modern science. MOlecular Solar Thermal (MOST) systems, in particular those based on azobenzene switches, have received great interest in the last decades.

Azobenzene-Based Solar Thermal Fuels: A Review

Although the energy storage density of azobenzene is not as high as that of the NBD/QC derivative system (up to 0.97 MJ kg −1), unique isomerization mechanisms during the heat storage and release processes endow azobenzene energy storage system with16

Azobenzene-Equipped Covalent Organic Framework: Light …

Light-operated materials have gained significant attention for their potential technological importance. To achieve molecular motion within extended networks, stimuli-responsive units require free space. The majority of the so far reported 2D-extended organic networks with responsive moieties restrict their freedom of motion on account of …

Solar-Thermal Energy Conversion and Storage Using …

Solar-thermal energy storage and release are based on reversible trans-cis isomerization of azobenzene groups. The polymers serve as templates/matrices for azobenzene groups. CNTs and …

Azobenzene-Based Solar Thermal Fuels: A Review

The energy storage mechanism of azobenzene is based on the transformation of molecular cis and trans isomerization, while NBD/QC, DHA/VHF, and fulvalene dimetal complexes realize the energy ...

Azobenzene-containing polymer for solar thermal energy storage …

Recently, numerous azobenzene-based MOST fuels have been developed by various strategies including molecular engineering and template self-assembly to enhance the storage capacities, among which azobenzene-containing polymers (i.e., …

Photo-Isomerization Energy Storage Using Azobenzene and …

Azobenzene (AZO) has attached tremendous attention in the field of photo-isomerization energy storage due to its advantages of absorbing light in ultraviolet-visible range and reversible isomerization. However, the issues of low energy density and short half-lifetime restrict the further development of AZO. Therefore, a method, by preparing …

An azobenzene-based photothermal energy storage system for co-harvesting photon energy …

Most recently, photoliquefiable azobenzene (Azo) molecules have shown significant potential for harvesting and storing thermal energy due to their reversible photoinduced crystal-to-liquid transitions (PCLTs), controllable heat storage and release, and zero gas [15

Understanding and engineering azobenzene for thermal energy storage …

Download Citation | Understanding and engineering azobenzene for thermal energy storage | This thesis focuses on the understanding and engineering of a molecule known as azobenzene which holds ...

Azobenzene/graphene hybrid for high-density solar thermal storage …

A large capacity storing solar energy as latent heat in a close-cycle is essentially important for solar thermal fuels. This paper presents a solar thermal molecule model of a photo-isomerizable azobenzene (Azo) molecule covalently bound to graphene. The storage capacity of the Azo depending on isomerization enthalpy (ΔH) is calculated …

Azobenzene-Based Solar Thermal Fuels: A Review

The energy storage mechanism of azobenzene is based on the transformation of molecular cis and trans isomerization, while NBD/QC, DHA/VHF, and fulvalene dimetal complexes realize the energy storage function by changing the molecular structure. Acting as "molecular batteries," they can exhibit excell …

A high energy density azobenzene/graphene hybrid: a nano-templated platform for solar thermal storage

Effective conversion of light into heat is an emerging field showing great potential for large-scale applications, markedly driven by novel molecules and structures. Unfortunately, until now, it is still hindered by a low storage capacity and short-time storage. A nano-template for covalently attaching new a

Azobenzene-based solar thermal energy storage enhanced by gold nanoparticles for rapid, optically-triggered …

Solar thermal fuel (STF) technology based on azobenzene (Azo) compounds represents a novel approach for the capture, conversion, and storage of solar energy. Azos can store energy by isomerization between their thermodynamically stable trans-isomers and higher energy, metastable cis-isomers. The energy barri

Water-Soluble Azobenzene-Based Solar Thermal Fuels with …

Azobenzene (azo)-based solar thermal fuels (STFs) have been developed to harvest and store solar energy. However, due to the lipophilicity and low energy …

A High Energy Density Azobenzene/Graphene Oxide Hybrid with Weak Nonbonding Interactions for Solar Thermal Storage …

A high energy, reusable and daily-utilization molecular solar thermal conversion and storage material based on azobenzene/multi-walled carbon nanotubes hybrid. Thermochimica Acta 657, 163–169 ...

Azobenzene modified metal-organic framework: For solar energy …

A novel photochromic azo-grafted metal-organic framework (MOF), ZIF-90-AAT, was synthesized and characterized. ZIF-90-AAT not only retains the three …

Photoinduced Solid–Liquid Phase Transition and Energy Storage …

Photoinduced phase transition of photoswitches between solid and liquid has recently emerged as a strategy that effectively increases the total energy storage density of molecular solar thermal energy storage (MOST) systems. In particular, photoswitches including azobenzene and azoheteroarene derivatives that undergo large …

Azobenzene modified metal-organic framework: For solar energy storage …

A novel photochromic azo-grafted metal-organic framework (MOF), ZIF-90-AAT, was synthesized and characterized. ZIF-90-AAT not only retains the three-dimensional porous structure of ZIF-90 and high thermal stability, but also has sufficient free space for the isomerization reaction of azobenzene and photo-energy storage ability. ...

Templated assembly of photoswitches significantly increases the energy-storage …

Solar thermal fuels have recently attracted an increasing amount of attention as a potential method for solar energy capture, conversion, storage and utilization. Azobenzene-functionalized single ...

Demonstration of an azobenzene derivative based …

Molecules capable of reversible storage of solar energy have recently attracted increasing interest, and are often referred to as molecular solar thermal energy storage (MOST) systems. Azobenzene …

Azobenzene-Based Solar Thermal Fuels: A Review | Nano-Micro …

The energy storage mechanism of azobenzene is based on the transformation of molecular cis and trans isomerization, while NBD/QC, DHA/VHF, and …

Multichromophoric photoswitches for solar energy storage: from azobenzene …

The ever-increasing global demands for energy supply and storage have led to numerous research efforts into finding and developing renewable energy technologies. Molecular solar thermal energy storage (MOST) systems utilise molecular photoswitches that can be isomerized to a metastable high-energy s …

Azobenzene-based solar thermal energy storage …

Solar thermal fuel (STF) technology based on azobenzene (Azo) compounds represents a novel approach for the capture, conversion, and …

Photoliquefiable Azobenzene Surfactants toward Solar Thermal …

Photoresponsive phase change materials (PPCMs) are capable of storing photon and heat energy simultaneously and releasing the stored energy as heat …

Visible‐light‐switchable azobenzenes: Molecular design, …

The integrated device contained two filter layers and two energy-storage AB layers, and each filter layer and energy storage layer formed a group (Figure 25c,d). The entire energy storage process is divided into two steps: the first step, which mainly stores visible light, and the second step, which mainly stores UV light (Figure 25e ).

Photon energy storage materials with high energy densities based on diacetylene–azobenzene …

We developed a series of symmetric diacetylenes and polydiacetylenes and obtained high energy-density materials that can store up to 176.2 kJ mol −1 (or 200.2 kJ mol −1, if completely charged); more than double that of pristine azobenzene. The extra energy

Demonstration of an azobenzene derivative based solar thermal …

The system features several attractive properties, such as a long energy storage half-life (40 h) at room temperature, as well as an excellent robustness demonstrated by optically …

Optimizing the performance of phase-change azobenzene: from …

Recent pioneering studies have focused on the molecular design of Azo derivatives to enhance the energy storage performance. Phase-change Azo (PC-Azo) derivatives—fabricated by integrating molecular photoswitches with phase-change materials—capture both the enthalpy of phase change and that of isomerization, thereby …

Design of phase-transition molecular solar thermal energy storage compounds: compact molecules …

A series of compact azobenzene derivatives were investigated as phase-transition molecular solar thermal energy storage compounds that exhibit maximum energy storage densities around 300 J g−1. The relative size and polarity of the functional groups on azobenzene were manifested to significantly influence th

Water-Soluble Azobenzene-Based Solar Thermal Fuels with Improved Long-Term Energy Storage and Energy …

Azobenzene (azo)-based solar thermal fuels (STFs) have been developed to harvest and store solar energy. However, due to the lipophilicity and low energy density of azo-based STFs, the derived devices demand a large amount of toxic organic solvents for continuous and scalable energy storage. Herein, we report an ionic strategy to prepare …

Understanding Solid-State Photochemical Energy …

In this work, we present a systematic study of methacrylate- and acrylate-based polymers with azobenzene side groups to establish the mechanism of energy storage and release and the factors …

Solar-Thermal Energy Conversion and Storage Using Photoresponsive Azobenzene …

There were early studies using photoisomerization of azobenzene compounds for solar energy conversion and storage more than 30 years ago. In 1983, Olmsted et al. studied photochemical storage potential of azobenzene compounds. 13 They concluded that azobenzene compounds were not favorable for photochemical solar …