Selective Coordination of Cu2+ and Subsequent Anion Detection Based on a Naphthalimide-Triazine-(DPA)2 Chemosensor

A new fluorescent chemosensor for copper (II) and subsequent anion sensing was designed and fully characterized. The sensor consisted of a 1,8-naphthalimide core, bearing two terminal dipicolylamine (DPA) receptor units for binding metal cations, and an ethoxyethanol moiety for enhanced water solubility. The DPA units are connected to position 4 of the fluorophore via a triazine-ethylenediamine spacer. Fluorescence titration studies of the chemosensor revealed a high selectivity for Cu2+ over other divalent ions, the emissions were strongly quenched upon binding, and a stability constant of 5.52 log units was obtained. Given the distance from DPA chelating units and the fluorophore, quenching from the Cu2+ complexation suggests an electron transfer or an electronic energy transfer mechanism. Furthermore, the Cu2+-sensor complex proved to be capable of sensing anionic phosphate derivatives through the displacement of the Cu2+ cation, which translated into a full recovery of the luminescence from the naphthalimide. Super-resolution fluorescence microscopy studies performed in HeLa cells showed there was a high intracellular uptake of the chemosensor. Incubation in Cu2+ spiked media revealed a strong fluorescent signal from mitochondria and cell membranes, which is consistent with a high concentration of ATP at these intracellular sites.

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Design and Synthesis of Cyclometalated Iridium(III) Complexes—Chromophore Hybrids that Exhibit Long-Emission Lifetimes Based on a Reversible Electronic Energy Transfer Mechanism

Inorganic Chemistry ◽

10.1021/acs.inorgchem.0c00363 ◽

2020 ◽

Vol 59 (10) ◽

pp. 6905-6922 ◽

Cited By ~ 2

Author(s):

Ayami Kazama ◽

Yuki Imai ◽

Yoshinori Okayasu ◽

Yasuyuki Yamada ◽

Junpei Yuasa ◽

...

Keyword(s):

Energy Transfer ◽

Electronic Energy ◽

Transfer Mechanism ◽

Energy Transfer Mechanism ◽

Electronic Energy Transfer ◽

Design And Synthesis

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Correction to Design and Synthesis of Cyclometalated Iridium(III) Complexes—Chromophore Hybrids that Exhibit Long-Emission Lifetimes Based on a Reversible Electronic Energy Transfer Mechanism

Inorganic Chemistry ◽

10.1021/acs.inorgchem.1c01109 ◽

2021 ◽

Author(s):

Ayami Kazama ◽

Yuki Imai ◽

Yoshinori Okayasu ◽

Yasuyuki Yamada ◽

Junpei Yuasa ◽

...

Keyword(s):

Energy Transfer ◽

Electronic Energy ◽

Transfer Mechanism ◽

Energy Transfer Mechanism ◽

Electronic Energy Transfer ◽

Design And Synthesis

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Influence of applied pressure on the probability of electronic energy transfer across a molecular dyad

Pure and Applied Chemistry ◽

10.1351/pac-con-12-09-04 ◽

2013 ◽

Vol 85 (7) ◽

pp. 1349-1365 ◽

Cited By ~ 4

Author(s):

Mohammed A. H. Alamiry ◽

Effat Bahaidarah ◽

Anthony Harriman ◽

Jean-Hubert Olivier ◽

Raymond Ziessel

Keyword(s):

Energy Transfer ◽

Applied Pressure ◽

Electronic Energy ◽

Conformational Exchange ◽

Conjugation Length ◽

High Concentration ◽

Coulombic Interactions ◽

Electronic Energy Transfer ◽

Covalently Linked ◽

Energy Acceptor

A pair of covalently linked molecular dyads is described in which two disparate boron dipyrromethene dyes are separated by a tolane-like spacer. Efficient electronic energy transfer (EET) occurs across the dyad; the mechanism involves important contributions from both Förster-type coulombic interactions and Dexter-type electron exchange processes. The energy acceptor is equipped with long paraffinic chains that favor aggregation at high concentration or at low temperature. The aggregate displays red-shifted absorption and emission spectral profiles, relative to the monomer, such that EET is less efficient because of a weaker overlap integral. The donor unit is insensitive to applied pressure but this is not so for the acceptor, which has extended π-conjugation associated with appended styryl groups. Here, pressure reduces the effective π-conjugation length, leading to a new absorption band at higher energy. With increasing pressure, the overall EET probability falls but this effect is nonlinear and at modest pressure there is only a small recovery of donor fluorescence. This situation likely arises from compensatory phenomena such as restricted rotation and decreased dipole screening by the solvent. However, the probability of EET falls dramatically over the regime where the π-conjugation length is reduced owing to the presumed conformational exchange. It appears that the pressure-induced conformer is a poor energy acceptor.

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Chemically driven visible laser amplifiers and oscillators based on fast intermolecular electronic energy transfer

10.2514/6.1993-3209 ◽

1993 ◽

Cited By ~ 1

Author(s):

J. GOLE ◽

K. SHEN ◽

H. WANG ◽

C. WINSTEAD ◽

J. STEPHENS

Keyword(s):

Energy Transfer ◽

Electronic Energy ◽

Laser Amplifiers ◽

Electronic Energy Transfer ◽

Visible Laser

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Damming an Electronic Energy Reservoir: Ion-regulated Electronic Energy Shuttling in a [2]Rotaxane

Chemical Science ◽

10.1039/d1sc02225c ◽

2021 ◽

Author(s):

Shilin Yu ◽

Gediminas Jonusauskas ◽

Jean-Luc Pozzo ◽

Stephen Goldup ◽

Vicente Martí Centelles ◽

...

Keyword(s):

Energy Transfer ◽

Electronic Energy ◽

Electronic Energy Transfer

We demonstrate the first example of bidirectional reversible electronic energy transfer (REET) between the mechanically bonded components of a rotaxane. Our prototypical system was designed such that photoexcitation of a...

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