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β-Cyclodextrin derived full-spectrum fluorescent carbon dots: The formation process investigation and biological applications

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Chinese Chemical Letters 2023年第10期34卷 215-222页

作者： Peide Zhu Wenjing Li Yuqi Zhang Qiang Sun Yi Lin Ailin Qiu Xinyi Chen Yujin Zhou Guangfu Wu Yifan Li Zhiqiang Yu Quan Xu Dixian Luo Lulu Cai State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Department of Laboratory Medicine Huazhong University of Science and Technology Union Shenzhen Hospital(Nanshan Hospital)Shenzhen 518052China Personalized Drug Therapy Key Laboratory of Sichuan Province Department of PharmacySichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 611731China Department of Laboratory Medicine Dongguan Institute of Clinical Cancer ResearchAffiliated Dongguan HospitalSouthern Medical UniversityDongguan 523018China

Carbon dots(CDs), a new building unit, have been revolutionizing the fields of biomedicine, bioimaging, and optoelectronics with their excellent physical, chemical, and biological properties. However, the difficulty of preparing excitation-dependent full-spectrum fluorescent CDs has seriously hindered their further research in fluorescence emission mechanisms and biomedicine. Here, we report full-spectrum fluorescent CDs that exhibit controlled emission changes from purple(380 nm) to red(613 nm) at room temperature by changing the excitation wavelength, and the excitation dependence was closely related to the regulation of sp2 and sp3 hybrid carbon structures by β-cyclodextrin-related groups. In addition,by regulating the content of β-cyclodextrin, the optimal quantum yields of full-spectrum fluorescent CDs were 8.97%, 8.35%, 7.90%, 9.69% and 17.4% at the excitation wavelengths of 340, 350, 390, 410 and 540 nm,respectively. Due to their excellent biocompatibility and color tunability, full-spectrum fluorescent CDs emitted bright and steady purple, blue, green, yellow, and red fluorescence in MCF-7 cells. Moreover, we optimized the imaging conditions of CDs and mitochondrial-specific dyes;and realized the mitochondrialtargeted co-localization imaging of purple, blue and green fluorescence. After that, we also explored the effect of full-spectrum fluorescent CDs in vivo fluorescence imaging through the intratumorally, subcutaneously, and caudal vein, and found that full-spectrum fluorescent CDs had good fluorescence imaging ability in vivo.

关键词： Carbon dots multi-emission Fluorescence mechanism Mitochondrial targeting Color tenability Fluorescence imaging

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M3(pyrazolate)3-a Colorful Supramolecular Synthon

M3(pyrazolate)3-a Colorful Supramolecular Synthon

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中国化学会第二届全国光功能材料青年学者研讨会

作者： Shun-Ze Zhan Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University

Cyclic trinuclear units(CTUs) MPz(M = Cu(I), Ag(I) and Au(I), Pz = pyrazolate) are of significantly fascinating supramolecular synthons[1-5] to achieve novel supramolecular aggregates based on metallophilicity, πacid/base interactions and coordination bond due to their planar geometry and unsaturated metal centers(UMC). These supramolecular aggregates are lightened by these supramolecular interactions to show tunable colors based on multi-emissions,[3] including the feature emission color of the individual component and newly-emerged emission color of the dimer/trimer. They show potential applications in sensors, luminescent materials and even white-light emission diode(WLED).[4] For examples:1. The complexes incorporating(Cu Pz) and Cun In units show temperature sensing ability and chemopalette effects;2. Modulating the aggregation behaviors to realize fluorescence/phosphorescence switching and even white-light emission;3. π acid/base adducts show special luminescence properties for halide/pseudo-halide or sensing aromatic molecules;4. Coordination adducts show colorful luminescence properties sensitive to the weak coordination bonds.

关键词： coinage metal pyrazolate multi-emission metallophilicity πacid/base interactions

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