A Dual-Emissive Phosphine–Borane Lewis Pair with a U‑Shaped Linker: Impact of Methylation and Complexation on Fluoride Binding Affinity

To investigate phosphine to borane through-space charge transfer and its utility in anion sensing and the formation of metal complexes, a phosphine–borane Lewis pair (1) connected by a U-shaped linker has been synthesized. 1 could be readily converted to a phosphonium salt (2) and two 2:1 complexes with Au­(I) (1-Au) and Pt­(II) (1-Pt). The photophysical properties of the new compounds were examined and compared. Compound 1 displayed an intense P → B CT transition and a bright solvent-dependent dual emission that is switchable by fluoride ions. 2 and 1-Pt showed a turn-off and a turn-on fluorescent response, respectively, toward fluoride ions. The binding constant of 2 with F– was found to be 2 orders of magnitude greater than that of 1. The mechanism that is responsible for the distinct fluorescence response of 1, 2, and 1-Pt toward fluoride ions is proposed

Sustainable Packaging with Waterborne Acrylated Epoxidized Soybean Oil

Packaging is responsible for 46% of total plastic waste, and thus, sustainable packaging alternatives are urgently required. Reported herein is coated paper as a sustainable packaging material using waterborne acrylated epoxidized soybean oil (AESO) to coat kraft paper. The waterborne AESO was cast onto kraft paper and was then photo-cured. Upon curing, the coated paper was tested for its oil and water repellency as well as its mechanical properties. Biodegradability studies were also conducted for the coated paper, and our findings suggest that its biodegradability reaches >90% within 90 days. The coating process was also evaluated for its compatibility with paper printing processes and its resistance to hot oil. Overall, the AESO-emulsion-coated paper offers desirable water and oil resistance and mechanical properties, offers biodegradability, and is also cost-effective. This work thus provides a sustainable alternative to the currently wasteful packaging made with plastic or plastic-coated paper. This work also fits numerous principles of green chemistry, such as waste prevention (no microplastics), the use of safer solvents (water), the promotion of renewable feedstock, and the design of packaging that is biodegradable

A Dual-Emissive Phosphine–Borane Lewis Pair with a U‑Shaped Linker: Impact of Methylation and Complexation on Fluoride Binding Affinity

To investigate phosphine to borane through-space charge transfer and its utility in anion sensing and the formation of metal complexes, a phosphine–borane Lewis pair (<b>1</b>) connected by a U-shaped linker has been synthesized. <b>1</b> could be readily converted to a phosphonium salt (<b>2</b>) and two 2:1 complexes with Au­(I) (<b>1-Au</b>) and Pt­(II) (<b>1-Pt</b>). The photophysical properties of the new compounds were examined and compared. Compound <b>1</b> displayed an intense P → B CT transition and a bright solvent-dependent dual emission that is switchable by fluoride ions. <b>2</b> and <b>1-Pt</b> showed a turn-off and a turn-on fluorescent response, respectively, toward fluoride ions. The binding constant of <b>2</b> with F^– was found to be 2 orders of magnitude greater than that of <b>1</b>. The mechanism that is responsible for the distinct fluorescence response of <b>1</b>, <b>2</b>, and <b>1-Pt</b> toward fluoride ions is proposed

Coexistence of Antiadhesion Performance, Intrinsic Stretchability, and Transparency

Antiadhesion performance, stretchability, and transparency are highly desirable properties for materials and devices in numerous applications. However, the existing strategies for imparting materials with antiadhesion performance generally induce rigidity and opacity, and principle is yet to be provided for designing materials that combine these important parameters. Here, we show that four factors including a low surface energy, appropriate cross-linking, availability of a homogeneous and amorphous composite, and a smooth material surface can be used to design an intrinsically stretchable and transparent polymer film with antiadhesion performance against various liquids including water, diiodomethane, hexadecane, cooking oil, and pump oil. The film can be obtained via simply molding a waterborne polymer network at ambient temperature. Furthermore, the film can retain its antiadhesion performance and outstanding transparency even when it is subjected to large mechanical deformations reaching up to 1800%, and its maximal fracture strain exceeds 3000%. These design concepts offer a general platform for achieving multiple material functionalities, and may open new avenues for the surface functionalization of stretchable materials and devices

Coexistence of Antiadhesion Performance, Intrinsic Stretchability, and Transparency

Antiadhesion performance, stretchability, and transparency are highly desirable properties for materials and devices in numerous applications. However, the existing strategies for imparting materials with antiadhesion performance generally induce rigidity and opacity, and principle is yet to be provided for designing materials that combine these important parameters. Here, we show that four factors including a low surface energy, appropriate cross-linking, availability of a homogeneous and amorphous composite, and a smooth material surface can be used to design an intrinsically stretchable and transparent polymer film with antiadhesion performance against various liquids including water, diiodomethane, hexadecane, cooking oil, and pump oil. The film can be obtained via simply molding a waterborne polymer network at ambient temperature. Furthermore, the film can retain its antiadhesion performance and outstanding transparency even when it is subjected to large mechanical deformations reaching up to 1800%, and its maximal fracture strain exceeds 3000%. These design concepts offer a general platform for achieving multiple material functionalities, and may open new avenues for the surface functionalization of stretchable materials and devices

Triarylborane-Supported Polyferrocenyl Systems: Impact of the Linking Unit on Electronic and Electrochemical Properties

A family of ferrocenylborane compounds has been synthesized with the aim to examine the impact of the linker units on the mutual influence of the borane and ferrocene units on electronic and electrochemical properties. Fluoride titrations were performed on all compounds. The monoferrocenyl compounds <b>1</b>–<b>3</b> and the diferrocenyl compound <b>4</b> showed expected fluoride binding, while compounds <b>5</b> and <b>6</b> do not or only weakly respond to the addition of fluoride ions, as indicated by UV–vis and NMR spectroscopic data. Cyclic voltammetry studies showed that there is no electronic communication between the ferrocenyl units in compounds that contain two or three ferrocenyl units. The linker units were found to have a distinct impact on the electronic and electrochemical properties of the borane-linked/containing ferrocene molecules

Coexistence of Antiadhesion Performance, Intrinsic Stretchability, and Transparency

Antiadhesion performance, stretchability, and transparency are highly desirable properties for materials and devices in numerous applications. However, the existing strategies for imparting materials with antiadhesion performance generally induce rigidity and opacity, and principle is yet to be provided for designing materials that combine these important parameters. Here, we show that four factors including a low surface energy, appropriate cross-linking, availability of a homogeneous and amorphous composite, and a smooth material surface can be used to design an intrinsically stretchable and transparent polymer film with antiadhesion performance against various liquids including water, diiodomethane, hexadecane, cooking oil, and pump oil. The film can be obtained via simply molding a waterborne polymer network at ambient temperature. Furthermore, the film can retain its antiadhesion performance and outstanding transparency even when it is subjected to large mechanical deformations reaching up to 1800%, and its maximal fracture strain exceeds 3000%. These design concepts offer a general platform for achieving multiple material functionalities, and may open new avenues for the surface functionalization of stretchable materials and devices

Coexistence of Antiadhesion Performance, Intrinsic Stretchability, and Transparency

Antiadhesion performance, stretchability, and transparency are highly desirable properties for materials and devices in numerous applications. However, the existing strategies for imparting materials with antiadhesion performance generally induce rigidity and opacity, and principle is yet to be provided for designing materials that combine these important parameters. Here, we show that four factors including a low surface energy, appropriate cross-linking, availability of a homogeneous and amorphous composite, and a smooth material surface can be used to design an intrinsically stretchable and transparent polymer film with antiadhesion performance against various liquids including water, diiodomethane, hexadecane, cooking oil, and pump oil. The film can be obtained via simply molding a waterborne polymer network at ambient temperature. Furthermore, the film can retain its antiadhesion performance and outstanding transparency even when it is subjected to large mechanical deformations reaching up to 1800%, and its maximal fracture strain exceeds 3000%. These design concepts offer a general platform for achieving multiple material functionalities, and may open new avenues for the surface functionalization of stretchable materials and devices

Coexistence of Antiadhesion Performance, Intrinsic Stretchability, and Transparency

Antiadhesion performance, stretchability, and transparency are highly desirable properties for materials and devices in numerous applications. However, the existing strategies for imparting materials with antiadhesion performance generally induce rigidity and opacity, and principle is yet to be provided for designing materials that combine these important parameters. Here, we show that four factors including a low surface energy, appropriate cross-linking, availability of a homogeneous and amorphous composite, and a smooth material surface can be used to design an intrinsically stretchable and transparent polymer film with antiadhesion performance against various liquids including water, diiodomethane, hexadecane, cooking oil, and pump oil. The film can be obtained via simply molding a waterborne polymer network at ambient temperature. Furthermore, the film can retain its antiadhesion performance and outstanding transparency even when it is subjected to large mechanical deformations reaching up to 1800%, and its maximal fracture strain exceeds 3000%. These design concepts offer a general platform for achieving multiple material functionalities, and may open new avenues for the surface functionalization of stretchable materials and devices