2022
DOI: 10.1021/acs.jpca.2c02665
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Synthesis and Optical Characterization of a Rhodamine B Spirolactam Dimer

Abstract: Amide derivatives of xanthene dyes such as rhodamine B are useful in a variety of sensing applications due to their colorimetric responses to stimuli such as acidity changes and UV light. The optical properties of these molecules can be influenced by intermolecular associations into dimeric structures, but the exact impact can be hard to predict. We have designed a covalently linked intramolecular dimer of the dye rhodamine B utilizing p-phenylenediamine to link the two dyes via amide bonds. The doubly closed … Show more

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Cited by 9 publications
(8 citation statements)
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“…Rhodamine dyes are readily available, relatively inexpensive, and well known for having high quantum yields and strong absorption. These properties make rhodamine dyes of great interest in applications as sensors, photovoltaics, and in biological systems. The aggregation of these dyes leads to changes in the electronic states and spectral shifts in the absorption and fluorescence spectra, which have been extensively studied. Characterization of the spectral changes between monomers and aggregates of the same dye is of interest in the development of sensors.…”
Section: Introductionmentioning
confidence: 99%
“…Rhodamine dyes are readily available, relatively inexpensive, and well known for having high quantum yields and strong absorption. These properties make rhodamine dyes of great interest in applications as sensors, photovoltaics, and in biological systems. The aggregation of these dyes leads to changes in the electronic states and spectral shifts in the absorption and fluorescence spectra, which have been extensively studied. Characterization of the spectral changes between monomers and aggregates of the same dye is of interest in the development of sensors.…”
Section: Introductionmentioning
confidence: 99%
“… 42 Hence, RHBIT exhibits typical rhodamine spirolactam ring-opening behavior in the presence of acid and also under UV light illumination. 20 We have further studied the emission intensity of the newly formed photoinduced products at regular intervals for 48 h. After 48 h, the emission intensity decreased ∼4-fold and 140-fold for CHCl 3 ( λ max,emi = 588 nm) and DCM ( λ max,emi = 584 nm) solutions, respectively (Fig. S8 † ).…”
Section: Resultsmentioning
confidence: 99%
“…A similar observation was reported by Fogerty et al when they attempted to crystallize rhodamine B phenylene diamine dimer with HCl. 20 …”
Section: Resultsmentioning
confidence: 99%
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