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    Sustainable synthesis, reduction and applications of graphene obtained from renewable resources
    (Elsevier, 2021-09-01)
    Graphene is a revolutionary material with outstanding electrical, mechanical, thermal, and structural properties. The synthesis of graphene and its derivatives generally requires expensive and poisonous reagents. However, contemporary research efforts are switching towards more sustainable routes. The present review focused on the synthesis, performance, and applications of graphene-derived nanomaterials synthesized from waste biomass and reduced by green alternatives. Graphitization of waste carbon precursors is the most used method to obtain high purity graphite alternatives. Other methods, such as CVD, hydrothermal, laser, and CAS, have been investigated. Graphene yielded from biomass precursors exhibits properties similar to those from conventional sources. Green reduction of graphene oxide is carried out mostly by plant extracts from fruits, leaves, and other parts, which contain a high concentration of phenolic compounds. The as-prepared bio-waste and green-reduced graphene alternatives were applied in wastewater treatment, electrochemical storage devices, and metal ion sensors. In some cases, graphene showed significantly better performance than previous carbon-based nanomaterials reported in the literature. Despite being in its early stages of development, green-synthesized graphene has demonstrated great potential. As the interest in the development of sustainable alternatives continues to grow, future graphene research is expected to aim for this new line of research.
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    Tuning the Emission Color of Photoluminescent Molecular Solid-State Materials in the Visible: A Subtle Game between Molecular Structure and Low-Energy Interactions to the Development of Innovative Applications
    (American Chemical Society, 2026-04-24)
    The chemical nature of luminescent materials is highly diversified, as they can be inorganics, organics, or organic–inorganic hybrid materials. Among the wealth of compounds with various compositions, this Spotlight aims to give an overview of some of the most investigated strategies that are currently developed to tune the color of photoluminescent molecular materials emitting in the visible range. A focus is placed on two families of molecular materials: π-conjugated materials and lanthanide complexes. The ways used to vary the emission color of such materials are illustrated with representative examples taken from a selection of mostly recently published papers, including our own contributions in the field. The relationship between the structure and emission properties is particularly emphasized with an initial description of the main interactions that can occur in these materials, which are π–π stacking and hydrogen bonding, and their influence on both the structural and photophysical properties. Indeed, the presence of intra- or intermolecular interactions can drastically impact the emission properties, whether it is a change in intensity, in color, or both. Then, selected applications for which luminescent molecular materials are currently under investigation or have already reached commercialization are discussed.
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