1998
DOI: 10.1016/s1010-6030(97)00326-2
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Emission quenching via intramolecular electron transfer for fluorescein conjugates. Dependences on driving force and medium

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Cited by 11 publications
(3 citation statements)
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“…All of these results are in agreement with the occurrence of two processes, which involve the fluorescein units in the nanoparticles. The first one causes the complete quenching of about 50% of the fluorophoric units and is known to be due to the short-range interactions between the fluorescein molecules. , The second one leads to fluorescence depolarization and implies the excitation energy transfer between the different dye units in the nanoparticles. , These two situations are schematically depicted in Scheme . The possibility of having different kinds of interactions depending on the intermolecular distance makes fluorescein a good probe to test the structure of the fluorophore network.…”
mentioning
confidence: 99%
“…All of these results are in agreement with the occurrence of two processes, which involve the fluorescein units in the nanoparticles. The first one causes the complete quenching of about 50% of the fluorophoric units and is known to be due to the short-range interactions between the fluorescein molecules. , The second one leads to fluorescence depolarization and implies the excitation energy transfer between the different dye units in the nanoparticles. , These two situations are schematically depicted in Scheme . The possibility of having different kinds of interactions depending on the intermolecular distance makes fluorescein a good probe to test the structure of the fluorophore network.…”
mentioning
confidence: 99%
“…The conversion of the amine to an amide restores the fluorescence due to the electron‐withdrawing effects of the carbonyl oxygen. However, the presence of additional electron‐donating substituents on the amide can overcome this effect so that quenching is reestablished and electron transfer occurs with the chromophore acting as an electron donor (24,25). In these cases, the monoanion and dianion forms exhibit different sensitivities to quenching, which reflects their ability to act as electron donors, and they exhibit biexponential emission decays (25).…”
Section: Discussionmentioning
confidence: 99%
“…The distribution model and sulfur quenching can account for many of the observed properties of fluorescein‐conjugated molecules. However, fluorescein‐conjugated molecules can still show multiple lifetimes even when the conjugation does not occur through a sulfur group (25,30,31). As demonstrated in the present study, the presence of proximal sulfhydryl groups, such as cysteine residues in proteins, can cause quenching of fluorescein.…”
Section: Discussionmentioning
confidence: 99%