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
Citations
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References
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Journal ArticleDOI
Novel Luminescent Tricarbonylrhenium(I) Polypyridine Tyramine-Derived Dipicolylamine Complexes as Sensors for Zinc(II) and Cadmium(II) Ions
TL;DR: In this article, three luminescent tricarbonylrhenium(I) polypyridine complexes containing a tyramine-derived 2,2′-dipicolylamine (DPAT) unit were synthesized and characterized, and all the complexes exhibited triplet metal-to-ligand charge transfer (3MLCT) (dπ(Re) → π*(N∧N)) emission in fluid solutions at 298 K and in low-temperature alcohol glass.
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Reply to comment on 'aggregation-induced phosphorescent emission (AIPE) of iridium(III) complexes': origin of the enhanced phosphorescence.
TL;DR: Park et al. as mentioned in this paper showed that the pi-pi stacking of adjacent pyridyl rings of ppy ligands played a key role in the origin of phosphorescence emission in the solid state.
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Organic Triplet Excited States of Gold(I) Complexes with Oligo(o- or m-phenyleneethynylene) Ligands: Conjunction of Steady-State and Time-Resolved Spectroscopic Studies on Exciton Delocalization and Emission Pathways
TL;DR: A series of mononuclear and binuclear gold(I) complexes containing oligo(o- or m-phenyleneethynylene) (PE) ligands, namely [PhC≡C(C(6)H(4)-1,2-C⩽C)(n-1)Au(PCy(3))] (n = 2-4, 4a-c), were synthesized and structurally characterized.
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New Sensors for Quantitative Measurement of Mitochondrial Zn2
TL;DR: Observations that free Zn(2+) is buffered at concentrations about 3 orders of magnitude lower in mitochondria than in the cytosol and that HeLa cells expressing mito-ZapCY1 have an average [Zn( 2+)](mito) of 0.14 pM, which differs significantly from other cell types, could improve the understanding of the relationship between Zn (2+) homeostasis and mitochondrial function.
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Ruthenium Complexes that Break the Rules: Structural Features Controlling Dual Emission
TL;DR: A family of heteroleptic RuII coordination complexes containing substituted 1,10-phenanthroline (phen) ligands with extended conjugation was found to exhibit two simultaneously emissive excited states at room temperature in fluid solution, demonstrating a breakdown of the standard nonradiative decay pathways.