Polyoxometalate (POM)-based crystalline hybrid photochromic materials

Polyoxometalate/s-triazine hybrid heterostructures with ultrafast photochromic properties

“…On the other hand, viologen derivatives as a type of classical photochromic compound have been widely used as electron acceptors to construct D-A hybrid photochromic systems due to their inherent electron-deficient nature and ability to undergo a two-step redox process with the generation of colored radicals. [13][14][15] However, their relatively low π-conjugated structures are not conducive to the stabilization of the generated radicals. A promising candidate, TPT, may supersede viologen derivatives in D-A hybrid heterostructures.…”

Photochromism and single-component white light emission from a metalloviologen complex based on 1,5-naphthyridine

“…Electron-transfer (ET) photochromic materials have attracted widespread attention recently owing to their great potential applications 1 in the fields of energy conversion, 2 photomagnetic switching, 3 nonlinear switching, 4 photocatalysis, 5 anticounterfeiting 6 and inkless printing. 7 Metalloviologens act as an important emerging branch of ET photochromism and feature “D–M–A” coordination mode.…”

Highly efficient NIR-II photothermal conversion from a 2,2′-biquinoline-4,4′-dicarboxylate-based photochromic complex

“…27 Among them, PET 28 serving as one of the most promising strategies enables compounds to produce charge-separation states, leading to optical absorption changes and red-shifted extension. 29,30 However, reported photochromic photothermal complexes mainly show potential in NIR-I photothermal conversion, [31][32][33][34] and only one instance of a photochromic complex exhibiting NIR-II photothermal performance has been documented. Zhang et al 26 reported the first case of a TPT-based photochromic metal-organic framework manifesting a NIR-II photothermal effect with a relatively low PCE value of 32.2%.…”