Photon upconverting bioplastics with high efficiency and in-air durability

Abstract

There is an urgent demand for developing functional bioplastics that carry renewable energy production and replace conventional synthetic plastics. Here we report a simple one-step approach to create bioplastics with...

Far-red triplet sensitizedZ-to-Ephotoswitching of azobenzene in bioplastics

“…Thanks to the oxygen blocking ability of gelatin which protected chromophores triplets from oxygen quenching. [48][49] The triplet energy of ZnPc (1.12 eV) 50 is lower than that of Z-Azobenzene (~1.26 eV). 51 Hence, this is the first example of direct far-red sensitized solid-state photoswitching via endothermic triplet energy transfer (ΔE T = ~ + 0.14 eV).…”

“…[53][54] In addition to biodegradation, the nanoheterogenous polar structure of biopolymers 55 supports chromophores dispersion, and their thick fiber network can block oxygen in case of oxygen-sensitive photochemical reactions. [48][49] Previous efforts on azobenzene fabrication in biopolymers are limited to electrospinning of covalent functionalized Azo-cellulose-azobenzene film. 32 However, this film did not show any photoswitching.…”

Recyclable optical bioplastics platform for solid state red light harvestingviatriplet–triplet annihilation photon upconversion

“…62 Hence, through the successful execution of this work, we have now expanded the photon harvesting spectral range of TTA-UC bioplastics from 500 to 730 nm. 46 This journal is © The Royal Society of Chemistry 20xx…”

Intramolecular Triplet–Triplet Annihilation Photon Upconversion in Diffusionally Restricted Anthracene Polymer

“…Several approaches for upconversion in solid materials have been reported, for example, various assemblies of sensitizer and annihilator chromophores, , metal–organic frameworks, − matrix free (neat) films − and incorporation of the upconversion chromophores in a gel, , a rubbery polymer matrix, ,, or semisolid materials − that allows some molecular diffusion. However, with truly intramolecular upconversion, the upconversion system could be integrated into a fully solid material.…”