Photocatalytic Reactions of α-CF Alkenes with Alcohols by Controllable Non-, Mono- and Dual-Defluorination.

Herein, we present a chemoselective strategy for the divergent synthesis of γ-trifluoromethyl alcohols and difluorohomoallyl alcohols via photoredox-catalyzed hydroxyalkylation of α-CF alkenes with primary/secondary alcohols. Both products can further undergo base-mediated intramolecular defluorinative cyclization to construct monofluorinated dihydrofurans in a one-pot process. Through controllable C-F bond cleavage, this approach enables streamlined synthesis of three types of fluorinated products from abundant and inexpensive raw materials under mild photoredox conditions.

Photocatalyzed/Base-Mediated Defluorinative Three-Component Cascade Cyclization: Access to Monofluorocyclohexenes and 6-Fluoro-1,2,3,4-tetrahydropyridines.

A three-component cascade cyclization of α-CF alkenes, electron-rich alkenes, and dimethyl esters or sulfonamides via a dual C-F bond cleavage process is described. This methodology provides a general and efficient strategy to access monofluorocyclohexenes and 6-fluoro-1,2,3,4-tetrahydropyridines by switching the bifunctional reagents (dimethyl esters or sulfonamides), which are valuable building blocks in synthetic chemistry and the pharmaceutical industries. The reaction mechanism and the synthetic applications of the products have been demonstrated.

Lignocellulose-Based Optical Biofilter with High Near-Infrared Transmittance via Lignin Capturing-Fusing Approach.

Near-infrared (NIR) transparent optical filters show great promise in night vision and receiving windows. However, NIR optical filters are generally prepared by laborious, environmentally unfriendly processes that involve metal oxides or petroleum-based polymers. We propose a lignin capturing-fusing approach to manufacturing optical biofilters based on molecular collaboration between lignin and cellulose from waste agricultural biomass.

Fabrication of lignin-containing cellulose bio-composite based on unbleached corncob and wheat straw pulp.

In contemporary life, plastic, a kind of petroleum carbon source, has been produced and used in varieties of applications. However, the vast consumption of petroleum-based plastic and the burning of agricultural wastes make the environmental problems increasingly severe. Furthermore, a large number of lignocellulosic resources (such as corncob and wheat straw) are often wasted and burned, which will aggravate the environmental damage.

Facile one-step fabrication of all cellulose composites with unique optical performance from wood and bamboo pulp.

Cellulosic substrates completely originating from biomass have gained increasing attention for utilization in photoelectric devices due to their biodegradability, sustainability, and renewability. Herein, a simple one-step strategy was used to fabricate transparent (84.2%-90% at 550 nm) all-cellulose composites (ACCs) with customized optical haze (14.