Exploration of Highly Efficient Blue–Violet Light Conversion Agents for an Agricultural Film Based on Structure Optimization of Triphenylacrylonitrile

Abstract

To obtain highly efficient blue–violet light conversion agents used for an agricultural film, six triarylacrylonitrile derivatives and their doping films were prepared. Further, the luminogens have the ability to convert ultraviolet light into blue–violet light and exhibit aggregation-dependent fluorescence emission and high-contrast fluorescence quantum yields from 0.004 to 0.833. On the basis of X-ray single-crystal diffraction analysis and aggregation-induced emission activity tests, the variant fluorescence quantum yields are attributed to intermolecular π–π stacking and phase transition between the crystalline state and amorphous state. In a simulated greenhouse environment, the luminogens exhibit excellent photostability. However, their fluorescence intensity drops to 17–40% of the prime intensity after outdoor radiation for 1 month as a result of the ring-closing oxidation reaction (in the summer). By comprehensively considering the above photophysical properties and mechanical properties of the doping film, 2-([1,1′-biphenyl]-4-yl)-3,3-diphenylacrylonitrile is a potential light conversion agent for an agricultural film in the winter. More importantly, the results indicate that the properties of the light conversion films are expected to be further improved by molecular design, inhibiting the ring-closing oxidation reaction and dispersion of crystalline nanoparticles in the doping film.

Additive Production of a Material Based on an Acrylic Polymer with a Nanoscale Layer of Zno Nanorods Deposited Using a Direct Current Magnetron Discharge: Morphology, Photoconversion Properties, and Biosafety

“…It is known that plants photosynthesize most efficiently in the spectral ranges of 400–490 nm and 630–710 nm [ 40 ]; that is, the AP-ZnO material can potentially increase plant productivity. Currently, a large number of photoconversion materials are known [ 41 , 42 , 43 , 44 , 45 , 46 ]. At the same time, not many materials can boast of an increase in biomass productivity by 30%.…”

Research Progress of Light Wavelength Conversion Materials and Their Applications in Functional Agricultural Films

“…Wang et al [ 23 ] designed and synthesized six triarylacrylonitrile compounds and one diarylacrylonitrile compound and prepared light conversion films doped with these compounds. In the simulated greenhouse environment, the luminescence agents had excellent light stability.…”

Preparation of Degradable Wood Cellulose Films Using Ionic Liquids

“…Moreover, [Emim]­DEP is easy to synthesize and has low biotoxicity . In addition, it was reported that the red light (600–700 nm) and blue light (400–500 nm) used as light fertilizers could enhance the photosynthesis of plants by promoting the synthesis of carbohydrates and increasing the content of protein in crops, respectively . While ultraviolet (UV)-light (below 400 nm) hinders photosynthesis and damages the normal growth of crops .…”

“…18 In addition, it was reported that the red light (600−700 nm) and blue light (400−500 nm) used as light fertilizers could enhance the photosynthesis of plants by promoting the synthesis of carbohydrates and increasing the content of protein in crops, respectively. 19 While ultraviolet (UV)-light (below 400 nm) hinders photosynthesis and damages the normal growth of crops. 20 Based on the previous work, [Emim]DEP was selected as a solvent to prepare a highly efficient UV-to-red light conversion cellulose film (LCF) by doping rare-earth lightconverting particles CaAlSiN 3 :Eu 2+ (CASN) and using wood cellulose as a raw material.…”