Journal ArticleDOI
Metal coordination in photoluminescent sensing
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TLDR
The design principles and coordination chemistry of metal probes based on mechanisms of PeT, PCT, ESIPT, FRET, and excimer formation will be discussed in detail, with particular attention given to rationales for the design of turn-on and ratiometric probes.Abstract:
Coordination chemistry plays an essential role in the design of photoluminescent probes for metal ions. Metal coordination to organic dyes induces distinct optical responses which signal the presence of metal species of interest. Luminescent lanthanide (Ln(3+)) and transition metal complexes of d(6), d(8) and d(10) configurations often exhibit unique luminescence properties different from organic dyes, such as high quantum yield, large Stokes shift, long emission wavelength and emission lifetimes, low sensitivity to microenvironments, and can be explored as lumophores to construct probes for metal ions, anions and neutral species. In this review, the design principles and coordination chemistry of metal probes based on mechanisms of PeT, PCT, ESIPT, FRET, and excimer formation will be discussed in detail. Particular attention will be given to rationales for the design of turn-on and ratiometric probes. Moreover, phosphorescent probe design based on Ln(3+) and d(6), d(8) and d(10)-metal complexes are also presented via discussing certain factors affecting the phosphorescence of these metal complexes. A survey of the latest progress in photoluminescent probes for identification of essential metal cations in the human body or toxic metal cations in the environment will be presented focusing on their design rationales and sensing behaviors. Metal complex-based photoluminescent probes for biorelated anions such as PPi, and neutral biomolecules ATP, NO, and H(2)S will be discussed also in the context of their metal coordination-related sensing behaviors and design approaches.read more
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References
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Zinc(II)-Selective Ratiometric Fluorescent Sensors Based on Inhibition of Excited-State Intramolecular Proton Transfer
TL;DR: A zinc(II)-selective emission ratiometric probe suitable for biological applications is developed with a cation-induced inhibition of excited-state intramolecular proton transfer (ESIPT) with a series of 2-(2'-benzenesulfonamidophenyl)benzimidazole derivatives.
Journal ArticleDOI
Selective Phosphorescence Chemosensor for Homocysteine Based on an Iridium(III) Complex
TL;DR: Investigation of the photophysical properties of a new homocysteine-selective sensor based on the iridium(III) complex Ir(pba)2(acac) found it shows uniquely luminescent recognition of Hcy over other amino acids (including cysteine) and thiol-related peptides (reduced glutathione).
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A retrievable and highly selective fluorescent probe for monitoring sulfide and imaging in living cells.
Fengping Hou,Liang Huang,Pinxian Xi,Ju Cheng,Xuefei Zhao,Guoqiang Xie,Yanjun Shi,Feng-juan Cheng,Xiaojun Yao,Decheng Bai,Zhengzhi Zeng +10 more
TL;DR: A novel selective fluorescent chemosensor based on an 8-hydroxyquinoline-appended fluorescein derivative was synthesized and characterized that displayed high specificity for sulfide anion and can detect sulfur anions in biological systems at a relatively low concentration.
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A Targetable Fluorescent Sensor Reveals That Copper-Deficient SCO1 and SCO2 Patient Cells Prioritize Mitochondrial Copper Homeostasis
TL;DR: The findings reveal that the cell maintains copper homeostasis in mitochondria even in situations of copper deficiency and mitochondrial metallochaperone malfunction, illustrating the importance of regulating copper stores in this energy-producing organelle.
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Aggregation-induced phosphorescent emission (AIPE) of iridium(III) complexes.
TL;DR: A novel aggregation-induced phosphorescent emission (AIPE) was observed for iridium(III) complexes because of the intermolecular packing, resulting in a switch from the non-emissive 3LX excited state to the emissive3MLLCT transition, confirmed by X-ray diffraction studies as well as theoretical calculations.