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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Metal-Based NO Sensing by Selective Ligand Dissociation
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Selective Recognition of Cyanide Anion via Formation of Multipoint NH and Phenyl CH Hydrogen Bonding with Acyclic Ruthenium Bipyridine Imidazole Receptors in Water
Hao-Jun Mo,Yong Shen,Bao-Hui Ye +2 more
TL;DR: The phenyl CH···CN(-) hydrogen bonding interaction is observed by the HMBC NMR technique for the first time, which provides an efficient approach to directly probe the binding site of the receptor toward CN(-).
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Dual Emission from a Family of Conjugated Dinuclear RuII Complexes
TL;DR: Dual emission is observed from a family of simple acetylene-linked dinuclear RuII complexes, where two MLCT excited states coexist at room temperature and in fluid solution, attributed to a specific substitution pattern on the bridging ligand.
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A Cu(II)-based chemosensing ensemble bearing rhodamine B fluorophore for fluorescence turn-on detection of cyanide
TL;DR: A Cu(II)-based 2 : 2 chemosensing ensemble bearing rhodamine B fluorophore was developed for fluorescence turn-on detection of CN− with high selectivity and sensitivity based on the CN− complexation to the Cu2+ centre in the nearly planar central binding moiety.
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A new “turn-on” chemodosimeter for Hg2+: ICT fluorophore formation via Hg2+-induced carbaldehyde recovery from 1,3-dithiane
Yuncong Chen,Chengcheng Zhu,Zhenghao Yang,Jing Li,Yang Jiao,Weijiang He,Junjie Chen,Zijian Guo +7 more
TL;DR: A novel sensitive and specific Hg(2+) chemodosimeter, derived from 1',3'-dithiane-substituted 2,1,3-benzoxadiazole, displays "turn-on" fluorescent and colorimetric responses via an H g(2+)-triggered aldehyde recovery reaction.