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Chiral Methylbenzylpyridinium-Based Organic-Inorganic Lead Halides for Water-Resistant Photoluminescence Materials.
Inorg Chem
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Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
Chiral organic-inorganic metal halide (OIMH) materials are gaining increasing attention as candidates for asymmetric materials due to their unique photoelectric, chiral optic, and spintronic properties. The introduction of chirality into OIMHs is usually achieved by the use of chiral organic cations, while previous studies often focus on primary ammonium cations derived from commercially available chiral amines, limiting the tunability of the OIMH materials. Herein, we report the use of Zincke reactions to synthesize chiral N-substituted pyridinium salts, namely, (R)/(S)-methylbenzylpyridinium (/-MBnP) chloride and the corresponding 1D chiral OIMHs, (/-MBnP)PbX3 (X = Cl, Br, and I).
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Food4You Research Group, Department of Food Science and Nutrition (DECAN), Faculty of Food Engineering (FEA), Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
The Amazon region holds untapped potential with its starch-rich tubers, which are not yet industrialized and face a risk of extinction due to competition from widely cultivated crops. Beyond their traditional subsistence use, Amazonian tubers such as Mairá and Ariá can be utilized as starch sources, offering an opportunity to support regional agriculture, preserve indigenous heritage, and provide sustainable income streams. This study aimed to characterize starches extracted from Mairá (MPS) and Ariá (ARS for rhizome and APS for potato), focusing on their technological and functional potential.
View Article and Find Full Text PDFPlasmonic sensor design: Cu-SiO₂-Ni-black phosphorus for enhanced surface plasmon resonance in visible regime.
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Department Electronics and Communication Engineering, BKIT Dwarahat, Dwarahat, Uttarakhand, India, 263653.
A novel surface plasmon resonance (SPR) sensor is presented utilizing a BK7 prism, copper (Cu), silicon dioxide (SiO), nickel (Ni), and black phosphorus (BP) for enhanced biomolecule sensing in the refractive index (RI) range of 1.33 - 1.335.
View Article and Find Full Text PDFHelicene-Fluorescein Hybrids: A Reversible Base-triggered (Chir)optical Switch with Sign Inversion of Circularly Polarized Luminescence.
Chemistry
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Kyoto University: Kyoto Daigaku, Graduate Schools of Pharmaceutical Sciences, 46-29, Yoshidashimoadachi-cho, Sakyo-ku, 606-8501, Kyoto, JAPAN.
Novel circularly-polarized-luminescence (CPL) materials were designed and synthesized by integrating the intrinsic chirality of helicene with the acid/base-responsive properties of fluorescein. The synthesized helicene-fluorescein hybrids exhibit reversible switching between blue fluorescence under neutral conditions and red fluorescence under basic conditions. Furthermore, these hybrid compounds demonstrate unique chiroptical switching behavior with a rare base-triggered CPL sign inversion, where (P)-isomers show a negative CPL signal around 450 nm under neutral conditions and a positive signal around 620 nm under basic conditions, with three-fold enhanced dissymmetry factors (|glum|) under basic conditions.
View Article and Find Full Text PDFSurfactant-Free Stable Aqueous Shortwave Infrared Amphiphilic π-Conjugated Polymer Nanoparticles.
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Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens, 11635, Greece.
Novel amphiphilic π-conjugated polymer nanoparticles tailored to efficiently absorb in the near-infrared II (NIR-II) region of the electromagnetic spectrum (>1000 nm) are presented. To achieve this, it is statistically introduced triethylene glycol substituted bithiophene moieties in various contents into a polymer backbone consisting of alternating thiophene and [1,2,5]thiadiazolo[3,4-g]quinoxaline. Through systematic modifications of monomer ratios, four amphiphilic conjugated polymers are produced.
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