Crown ether model systems for the study of photoexcited state response to geometrically oriented perturbers. The effect of alkali metal ions on emission from naphthalene derivatives

Sousa, Lynn R.; Larson, James M.

doi:10.1021/ja00443a084

Cited by 121 publications

(45 citation statements)

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“…This resulted in the use of supramolecular chemistry in fluorescent chemosensor design. 8 Interestingly, these closely related chemosensors exhibit dichotomous behavior. 1 displayed a decrease in fluorescence quantum yield, also an increase in phosphorescence quantum yield, and a slight decrease in phosphorescence lifetime when it formed a complex with alkali metal chloride salts in 95% ethanol glass at 77 K. On the contrary, complexation of 2 with potassium (K + ), rubidium (Rb + ), or caesium (Cs + ) chloride salts caused a noticeable increase in fluorescence quantum yield, also a decrease in phosphorescence quantum yield, and a substantial decrease in phosphorescence lifetime.…”

Section: Fluorescent Chemosensors For Alkali and Alkaline Earth Metalmentioning

confidence: 99%

Fluorescent chemosensors: the past, present and future

et al. 2017

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Fluorescent chemosensors for ions and neutral analytes have been widely applied in many diverse fields such as biology, physiology, pharmacology, and environmental sciences. The field of fluorescent chemosensors has been in existence for about 150 years. In this time, a large range of fluorescent chemosensors have been established for the detection of biologically and/or environmentally important species. Despite the progress made in this field, several problems and challenges still exist. This tutorial review introduces the history and provides a general overview of the development in the research of fluorescent sensors, often referred to as chemosensors. This will be achieved by highlighting some pioneering and representative works from about 40 groups in the world that have made substantial contributions to this field. The basic principles involved in the design of chemosensors for specific analytes, problems and challenges in the field as well as possible future research directions are covered. The application of chemosensors in various established and emerging biotechnologies, is very bright.

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Section: Fluorescent Chemosensors For Alkali and Alkaline Earth Metalmentioning

confidence: 99%

Fluorescent chemosensors: the past, present and future

et al. 2017

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“…This attributed to the fact that the luminescence of Ln 3+ -chelates is related to the efficiency of the intramolecular energy transfer between the triplet level of ligand and the emitting level of the ions, which depends on the energy gap between the two levels. In the organic solvents, probably the energy gap between the ligand triplet levels and the emitting level of the terbium favors to the energy transfer process for terbium as shown in Figure 4 and Table 2 [41].…”

Section: Solvent Effect On the Luminescence Spectra Of Lanthanide Ionmentioning

confidence: 99%

Factors Affecting the Efficiency of Excited-States Interactions of Complexes between Some Visible Light-Emitting Lanthanide Ions and Cyclophanes Containing Spirobiindanol Phosphonates

Attia

Khalil

Abdel-Shafi

et al. 2007

International Journal of Photoenergy

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“…However, fluorescent alkali metal complexes of 8‐hydroxyquinolinates [(Liq) n ; Scheme ] are well known and these dyes are successfully used as emitters and electron injectors in organic light‐emitting diodes . The application of crown ethers and aza‐crowns in combination with an attached fluorophore, for example, polyaromatic hydrocarbons, as alkali metal ion probes is also well established . The emission bands of such metal ion probes shift in response to the chelation of alkali metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…[29,30] The application of crown ethers and aza-crowns in combinationw ith an attached fluorophore, for example, polyaromatic hydrocarbons, as alkali metal ion probes is also welle stablished. [36][37][38] The emission bands of such metal ion probes shift in response to the chelation of alkali metal ions.…”

Section: Introductionmentioning

confidence: 99%

Alkali Blues: Blue‐Emissive Alkali Metal Pyrrolates

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Förster

Basché

et al. 2019

Chemistry A European J

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2‐Iminopyrroles [HtBuL, 4‐tert‐butyl phenyl(pyrrol‐2‐ylmethylene)amine] are non‐fluorescent π systems. However, they display blue fluorescence after deprotonation with alkali metal bases in the solid state and in solution at room temperature. In the solid state, the alkali metal 2‐imino pyrrolates, M(tBuL), aggregate to dimers, [M(tBuL)(NCR)]2 (M=Li, R=CH3, CH(CH3)CNH2), or polymers, [M(tBuL)]n (M=Na, K). In solution (solv=CH3CN, DMSO, THF, and toluene), solvated, uncharged monomeric species M(tBuL)(solv)m with N,N′‐chelated alkali metal ions are present. Due to the electron‐rich pyrrolate and the electron‐poor arylimino moiety, the M(tBuL) chromophore possesses a low‐energy intraligand charge‐transfer (ILCT) excited state. The chelated alkali cations rigidify the chromophore, restricting intramolecular motions (RIM) by the chelation‐enhanced fluorescence (CHEF) effect in solution and, consequently, switch‐on a blue fluorescence emission.

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Crown ether model systems for the study of photoexcited state response to geometrically oriented perturbers. The effect of alkali metal ions on emission from naphthalene derivatives

Cited by 121 publications

References 0 publications

Fluorescent chemosensors: the past, present and future

Fluorescent chemosensors: the past, present and future

Factors Affecting the Efficiency of Excited-States Interactions of Complexes between Some Visible Light-Emitting Lanthanide Ions and Cyclophanes Containing Spirobiindanol Phosphonates

Alkali Blues: Blue‐Emissive Alkali Metal Pyrrolates

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