Discovering physicochemical principles for simultaneous harvesting of multiform energy from the environment will advance current sustainable energy technologies. Here we explore photochemical phase transitions—a photochemistry−thermophysics coupled regime—for coharvesting of solar and thermal energy. In particular, we show that photon …
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The efficient photochemical quantum yield for the cyclization reaction markedly contributes to the high energy storage efficiency as well as showing the capability of efficient cascade cycloreversion reactions. Photochromic molecules display reversible isomerization reactions between two isomers accompanied by an exchange between …
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Capturing photon energy from the sunlight by the reversible transformation of molecules, called molecular solar thermal (MOST) energy-storage systems, allows for the direct storage and …
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Capturing photon energy from the sunlight by the reversible transformation of molecules, called molecular solar thermal (MOST) energy-storage systems, allows for the direct storage and triggered release of such energy, complementary to solar cells and artificial leaves. In order to maximize the energy densities of MOST systems, it is critically …
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Molecular solar thermal (MOST) energy-storage materials are a class of compounds that store photon energy in chemical bonds upon photoconversion, which releases as heat …
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In particular, we show that photon energy and ambient heat can be stored together and released on demand as high-temperature heat, enabled by room …
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Solar energy is a viable and inexhaustible source of energy for both electricity and heat production. In this context energy storage is a major challenge due to strong daily and seasonal ...
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Light-induced energy storage and macroscopic heat release have been demonstrated for polymers with photoisomerizable azobenzene side groups. However, the mechanism of energy storage and the link ...
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Discovering physicochemical principles for simultaneous harvesting of multiform energy from the environment will advance current sustainable energy technologies. Here we explore photochemical phase transitions—a photochemistry−thermophysics coupled regime—for coharvesting of solar and thermal …
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Photochemical Phase Transitions Enable Coharvesting of Photon Energy and Ambient Heat for Energetic Molecular Solar Thermal Batteries That Upgrade Thermal Energy J Am Chem Soc . 2020 Jul 15;142(28):12256-12264. doi: 10.1021/jacs.0c03748.
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Since all molecular machines are fueled by an energy source, the management of energy─for example, its storage, retrieval, and conversion between different forms─is an obvious and most desirable function. …
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Furthermore, Azo is an ideal material for solar energy conversion and storage due to its high storage capacity and reversible switching between trans and cis conformation [19]. Even under natural lighting condition, the azobenzene compounds demonstrated 50 % of the cis -isomer energy storage within 1–2 h [ 20 ].
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Energy storage properties, photoinduced heat release, and rechargeable solar thermal battery films. (a) DSC curves of typical cis azo switches measured at 10 C/min (heating and cooling curves are ...
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Heat losses mainly occur in the solar thermochemical reactor through convection and irradiation; Q heat-loss2 and the heat exchange loss Q heat-loss1 are observed in the heat exchanger. The dissipated heat losses ( E iso + E relax ) associated with the photochemical section are transferred to the thermochemical reactors through …
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The move to explore photochemical methods for the conversion and storage of solar energy was part of the general search for alternative energy sources following the oil crises of the early 1970''s. With photosynthesis as a practical example of the success of this approach, many scientists began a search, involving both practical and fundamental …
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These Azos can co-harvest photon energy and ambient heat and store them as chemical bond energy and latent heat before releasing them as high-grade heat when needed. This novel photothermal energy harvest and storage system tactfully coupled photochemistry and thermophysics by exploiting the reversible PCLT feature of Azo …
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Discovering physicochemical principles for simultaneous harvesting of multiform energy from the environment will advance current sustainable energy technologies. Here we explore photochemical phase transitions a photochemistry−thermophysics coupled regime for coharvesting of solar and thermal …
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In 1983, Olmsted et al. studied the photochemical conversion and storage potential of azobenzene compounds [51]. Yoshida in 1985, Brun et al . in 1991, and Dubonosov et al . in 2002 summarized the checklist of molecular properties and proposed the basis for the development of early MOST fuels [52], [53], [54].
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Photochromic molecules display reversible isomerization reactions between two isomers accompanied by an exchange between heat and chemical potential. A considerable part of the absorbed light energy is stored in and released from the present E-type photochromic molecules, which undergo cyclization reactions under UV light excitation and backward …
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Molecular photoswitches can be used for solar thermal energy storage by photoisomerization into high-energy, meta-stable isomers; we present a molecular …
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Light-induced energy storage and macroscopic heat release have been demonstrated for polymers with photoisomerizable azobenzene side groups. However, the mechanism of energy storage and the link between the polymer structure, energy density and storage duration has not yet been explored in detail. In this work, we present a …
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Light-induced energy storage and macroscopic heat release have been demonstrated for polymers with photoisomerizable azobenzene side groups. However, the mechanism of energy storage …
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The design of molecular solar fuels is challenging because of the long list of requirements these molecules have to fulfil: storage density, solar harvesting capacity, robustness, and heat release ability. All of these features cause a paradoxical design due to the conflicting effects found when trying to improve any of these properties. In this …
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thermal energy storage, heat-to-electricity conversion, and heat pumps, among others. The thermal energy of interest can be harvested from abundant heat sources covering a wide Received: April 6, 2020
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Molecular solar thermal (MOST) energy-storage materials are a class of compounds that store photon energy in chemical bonds upon photoconversion, which releases as heat during reversion when triggered by external stimulation. 1,2,3 MOST …
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Photochemical isomer- ization will enable us to store heat optionally at ambient temperature. Photoisomerization of /nms-azobenzene(I) to cis- azobenzene (II) has been regarded as a promising reaction for the long-term storage of …
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The NBD↔QC thermal and photochemical valence isomerization [2π+2π] reactions have been addressed and investigated. Low energy crossing points between excited states were identified for both ...
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cyclic alkyl linker (C 8 and C 9) to a hydrazone core, the increased strain of theE iso- mers allowed for greater DH iso and energy storage of the system. 40 In addition, the cyclization increased the structural disorder in theE isomeric form, resulting in the crystal-to
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Discovering physicochemical principles for simultaneous harvesting of multiform energy from environment will advance current sustainable energy technologies. Here we explore photochemical phase transitions-a photochemistry-thermophysics coupled regime-for co-harvesting of solar and thermal energy. In particular, we show that photon energy and …
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Discovering physicochemical principles for simultaneous harvesting of multiform energy from the environment will advance current sustainable energy technologies. Here we explore photochemical phase transitions a photochemistry−thermophysics coupled regime for coharvesting of solar and thermal energy. In particular, we show that photon energy …
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However, the mechanism of energy storage and the link between the polymer structure, energy density and storage duration has not yet been explored in detail. 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 …
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Latent heat and photochemical energy are stored simultaneously without heat loss due to solidification. The crystallization temperature difference before and after UV-activated OCPCMs is defined as the optically-controlled phase change temperature difference (Δ T c ).
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