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Different molecular packing structures in the solid-state iridium(III) complex (1) induce unprecedented dual phosphorescent emission through 3M(LLLL)CT and 3M(LL)CT transitions.
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http://dx.doi.org/10.1039/b907058c | DOI Listing |
Chem Sci
August 2025
College of Chemistry and Chemical Engineering, Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University Jiujiang 332005 China
BN-fused aromatic compounds have garnered significant attention due to their unique electronic structures and exceptional photophysical properties, positioning them as highly promising candidates for applications in organic optoelectronics. However, the regioselective synthesis of BN isomers remains a formidable challenge, primarily stemming from the difficulty in precisely controlling reaction sites, limiting structural diversity and property tunability. Herein, we propose a regioselective synthetic strategy that employs 2,1-BN-naphthalene derivatives, wherein selective activation of N-H and C-H bonds is achieved in conjunction with -halogenated phenylboronic acids.
View Article and Find Full Text PDFChemistry
August 2025
Fachbereich Physik, Universität Konstanz, 78457, Konstanz, Germany.
We report on the new star-shaped triazatruxene (TAT) tetrad 1, where three peripheral TAT moieties connect to a central TAT through propargylic spacers. The insulating nature of the linkers results in separate, partially overlapping blue and yellow-orange emissions from the peripheral and central TATs. This renders 1 a multicolor emitter, whose emission color can be tuned by the choice of the excitation wavelength and the solvent.
View Article and Find Full Text PDFSmall
August 2025
Research Unit of Oral and Maxillofacial Regenerative Medicine, Chinese Academy of Medical Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, P. R. China.
Organic room temperature phosphorescence (RTP) materials offer high tumor-to-background imaging contrast owing to their long afterglow and minimal autofluorescence interference. In this work, a targeted phosphorescent nanoprobe is prepared based on a pyrene/benzophenone (PyBP) guest-host system and further functionalized it with folic acid and cyclic Arg-Gly-Asp peptide for enhanced tumor specificity. In oral squamous cell carcinoma (OSCC) xenograft models, this dual-ligand nanoprobe can help achieve a four-fivefold increase in the tumor signal over the background.
View Article and Find Full Text PDFMikrochim Acta
August 2025
State Key Laboratory of Chemical Safety, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China.
Biomass materials represent an ideal carbon source for synthesizing carbon dots (CDs) due to their abundance, elemental diversity, renewability, and low cost. This study presents a straightforward solvothermal method for synthesizing polychromatic carbon dots (MCDs) by systematically adjusting the reaction parameters using biomass-derived precursors (Perilla fruits leaves and tea polyphenols) under pH-modulated conditions (pH 2-13). The MCDs show tunable emission (395-646 nm), overcoming the traditional blue/green limitation of biomass-derived CDs.
View Article and Find Full Text PDFFood Chem
August 2025
Key Laboratory of Digital-Intelligence and Dynamic Perception for Food Quality of China Light Industry, Beijing Technology and Business University, Beijing 100048, PR China.
A dual-emission ratiometric sensing platform was developed for sensitive and selective detection of thiram, a toxic dithiocarbamate fungicide, by integrating fluorescence and room temperature phosphorescence (RTP) signals. The system employs boron-doped silane-functionalized carbon dots (RhB-CDs@SiO@BA) with Rhodamine B (RhB) to establish Förster resonance energy transfer (FRET)-mediated dual emission at 440/570 nm (fluorescence) and 490/590 nm (phosphorescence). The Cu-thiram complex selectively quenched both signals via inner filter effect (IFE), enabling precise quantification of thiram within a linear range of 0.
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