2010
DOI: 10.1016/j.aca.2010.01.029
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A highly selective fluorescent probe for Hg2+ based on a rhodamine–coumarin conjugate

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Cited by 134 publications
(32 citation statements)
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“…These probes primarily follow two types of approaches for sensing Hg 2+ : (i) simple reversible chemosensors, which involve achieving equilibrium between the spirolactam form (nonfluorescent) and the ringopened amide form (fluorescent) due to Hg 2+ coordination [31][32][33], and (ii) chemodosimeters, which are based on irreversible mercury-promoted desulfurization reactions, including hydrolysis, cyclization and elimination reactions, due to the strong thiophilic character of Hg 2+ ions [34][35][36][37][38]. To date, various researchers have developed chemosensors (type i) that contain Page 6 of 43 A c c e p t e d M a n u s c r i p t 6 urea [39], naphthalimide [40], terphenyl [41], coumarin [42] and calix [4]arene [33] as binding functionalities due to their nucleophilic properties. However, many of these sensors are pH sensitive, which might result in poor affinity for Hg 2+ under physiological conditions.…”
Section: Page 5 Of 43mentioning
confidence: 99%
“…These probes primarily follow two types of approaches for sensing Hg 2+ : (i) simple reversible chemosensors, which involve achieving equilibrium between the spirolactam form (nonfluorescent) and the ringopened amide form (fluorescent) due to Hg 2+ coordination [31][32][33], and (ii) chemodosimeters, which are based on irreversible mercury-promoted desulfurization reactions, including hydrolysis, cyclization and elimination reactions, due to the strong thiophilic character of Hg 2+ ions [34][35][36][37][38]. To date, various researchers have developed chemosensors (type i) that contain Page 6 of 43 A c c e p t e d M a n u s c r i p t 6 urea [39], naphthalimide [40], terphenyl [41], coumarin [42] and calix [4]arene [33] as binding functionalities due to their nucleophilic properties. However, many of these sensors are pH sensitive, which might result in poor affinity for Hg 2+ under physiological conditions.…”
Section: Page 5 Of 43mentioning
confidence: 99%
“…As the change in fluorescence intensity is the only detection signal, variations in the sample environment (concentration, temperature, pH, and so on) might influence the fluorescence intensity measurements. To eliminate these effects, a ratiometric fluorescent measurement is desirable [18][19][20][21][22][23][24][25]. Ratiometric chemosensors are exceptionally useful, as they can provide built-in correction for environmental factors by measuring the changes of emission intensities ratios at two different wavelengths.…”
Section: G R a P H I C A L Abstractmentioning
confidence: 99%
“…Specifically, the ring-closed rhodamine spirolactam or spirolactone derivatives typically undergo ring opening reaction, triggered by appropriate metal ions or other types of stimuli, and then converts the nonfluorescent ring-closed form of the derivatives to the counterpart ring-open spirolactam/lactone derivatives that gives rise to strong fluorescence emission [28]. Based on such conversion between spirocyclic and ring-open forms accompanied with a marked change in fluorescence emission, considerable of FRET-based fluorescent probes for various analytes have been developed [29][30][31][32][33][34]. Recently, Chen and co-workers have synthesized a novel class of indole-trizole based blue-light-emitting molecules [35].…”
Section: Introductionmentioning
confidence: 99%