The Fluorescence of Cyanine and Related Dyes in the Monomeric State<sup>1</sup>

Hofer, L. J. E.; Grabenstetter, Robert J.; Wiig, Edwin O.

doi:10.1021/ja01157a058

Cited by 74 publications

(28 citation statements)

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“…Furthermore, the consideration of π twist and distortion in the excited state has successfully produced new functional molecules, including twisted intramolecular charge‐transfer (TICT) molecules, thermally activated delayed fluorescence (TADF) molecules, or flapping (FLAP) molecules . On another front, the consideration of molecular twist and distortion in the excited state will explain some traditional understandings for organic luminogens such as “loose bolt” or “free rotor” effects in photochemistry, as well as up‐to‐date introduced concept, “suppression of Kasha's rule” . Therefore, we can expect to design new AIEgens with desirable properties using leading‐edge theoretical computations, ultrafast spectroscopy, and sophisticated synthetic techniques.…”

Section: Future Perspectivesmentioning

confidence: 99%

Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Kokado,

Sada

2019

Angew Chem Int Ed

148

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Aggregation‐induced emission (AIE) is a photoluminescence phenomenon in which an AIE luminogen (AIEgen) exhibits intense emission in the aggregated or solid state but only weak or no emission in the solution state. Understanding the mechanism of AIE requires consideration of excited state molecular geometry (for example, a π twist). This Minireview examines the history of AIEgens with a focus on the representative AIEgen, tetraphenylethylene (TPE). The mechanisms of solution‐state quenching are reviewed and the crucial role of excited‐state molecular transformations for AIE is discussed. Finally, recent progress in understanding the relationship between excited state molecular transformations and AIE is overviewed for a range of different AIEgens.

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Section: Future Perspectivesmentioning

confidence: 99%

Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Kokado,

Sada

2019

Angew Chem Int Ed

148

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“…This stems from the fact that the ring structure of the naphthalocyanine dyes is much more rigid than the polymethine chain in the tricarbocyanines. The flexible nature of the structure results in high rates of internal conversion, significantly reducing the fluorescence quantum yield and lifetime [17,31,32]. Several research groups have focused on the development of fluorogenic labels built from the tricarbocyanine molecule framework.…”

Section: Nir Fluorophoresmentioning

confidence: 99%

Near-infrared laser-induced fluorescence detection in capillary electrophoresis

McWhorter

Soper

2000

Electrophoresis

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“…Such a behaviour of dye molecules indicates that the radiationless deactivation process is caused by rotational motions of constituent phenyl groups during the lifetime of the excited singlet state Si [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Properties of p-Quaterphenyl and p-Quinquephenyl Derivatives in Liquid Solvents

Kawski¹,

Piszczek²,

Kubicki³

1996

Zeitschrift Für Naturforschung A

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Absorption, fluorescence and emission anisotropy spectra, as well as quantum yields and fluorescence decay times of p-quaterphenyl (PQP), 4,4"'-bis-(2-butyloctyloxy)-p-quaterphenyl (BBQ), 2,5,2"",5""-tetramethyl-p-quinquephenyl (TMI) and 3,5,3"",5""-tetra-f-butyl-p-quinquephenyl (QUI) were investigated in several nonpolar and polar solvents. It was found that high quantum yield is accompanied by a short (not exceeding 1 ns) lifetime and considerable emission anisotropy in low viscosity solvents. For TMI and QUI, which incorporate as many as 5 phenyl groups, the quantum yield in dioxane is 0.98 and 0.97, respectively. In the case of molecules with 4 phenyl groups, the quantum yield is slightly lower, amounting to 0.91. Rotational motions of terminal phenyl groups cause a lower deactivation of the excitation energy of the singlet state S p the longer the linear molecule.

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The Fluorescence of Cyanine and Related Dyes in the Monomeric State¹

Cited by 74 publications

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Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Near-infrared laser-induced fluorescence detection in capillary electrophoresis

Fluorescence Properties of p-Quaterphenyl and p-Quinquephenyl Derivatives in Liquid Solvents

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The Fluorescence of Cyanine and Related Dyes in the Monomeric State1

Cited by 74 publications

References 0 publications

Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Consideration of Molecular Structure in the Excited State to Design New Luminogens with Aggregation‐Induced Emission

Near-infrared laser-induced fluorescence detection in capillary electrophoresis

Fluorescence Properties of p-Quaterphenyl and p-Quinquephenyl Derivatives in Liquid Solvents

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The Fluorescence of Cyanine and Related Dyes in the Monomeric State¹