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2007
DOI: 10.1016/j.snb.2006.05.003
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Nortricarbocyanine dyes as suitable long wavelength pH indicators for chemical sensing

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Cited by 10 publications
(13 citation statements)
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“…Most popular indicator dyes for application in absorptiometric sensors belong to the group of azo-dyes, 15 17 , 23 , 70 , 76 , 194 , 201 239 phthalein, 82 , 194 , 225 , 226 , 240 250 sulfophthalein (ref ( 19 , 22 , 32 , 34 , 35 , 38 , 43 ), ( 45 , 63 , 71 , 102 , 194 , 213 , 222 , 226 ), ( 232 235 , 241 , 245 248 , 251 321 )), and other triphenylmethane dyes 15 , 50 , 224 , 236 , 252 , 263 , 302 , 322 325 ( Figure 17 ). Less common indicators belong to the groups of cyanines, 326 329 porphyrins, 69 , 330 339 and other classes ( Figure 18 ; description below). 60 , 76 , 111 , 340 350 …”
Section: Overview Of Commonly Used Absorptiometric Ph Probesmentioning
confidence: 99%
“…Most popular indicator dyes for application in absorptiometric sensors belong to the group of azo-dyes, 15 17 , 23 , 70 , 76 , 194 , 201 239 phthalein, 82 , 194 , 225 , 226 , 240 250 sulfophthalein (ref ( 19 , 22 , 32 , 34 , 35 , 38 , 43 ), ( 45 , 63 , 71 , 102 , 194 , 213 , 222 , 226 ), ( 232 235 , 241 , 245 248 , 251 321 )), and other triphenylmethane dyes 15 , 50 , 224 , 236 , 252 , 263 , 302 , 322 325 ( Figure 17 ). Less common indicators belong to the groups of cyanines, 326 329 porphyrins, 69 , 330 339 and other classes ( Figure 18 ; description below). 60 , 76 , 111 , 340 350 …”
Section: Overview Of Commonly Used Absorptiometric Ph Probesmentioning
confidence: 99%
“…However, the design, formulation and integration of the membranes are still key factors for modulating sensitivity, selectivity, response time and dynamic range. A proper selection of the main compounds involved in the recognition process is essential [ 11 , 246 ]. In the last years, miniaturized fluorescent optodes have been developed as an attractive alternative to absorbance optodes.…”
Section: Optical Sensorsmentioning
confidence: 99%
“…Most of them were included in bulk optodes, demonstrating their potential for their use as chemical sensors for absorbance [ 252 , 253 ] and fluorescence measurements [ 254 ], and some others were also applied in IWAOs [ 255 ], giving promising results. In this way, new far-visible absorbing hexamethine–hemicyanine [ 247 , 255 ], nortricarbocyanine [ 11 ], norcyanine [ 256 ], ketocyanine [ 257 ] and heptamethine cyanine [ 253 ] dyes have been synthesised for future application as chromoionophores in IWAOs based on bulk optodes or a miniaturized optical fluorosensor. The sensor has sucessfully characterized showing good analytical features.…”
Section: Optical Sensorsmentioning
confidence: 99%
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“…27 Estes indicadores, com valores de pKa na faixa de 1 a 8, mostraram-se estáveis e solúveis em membranas de PVC, podendo ser aplicados para determinação de pH em reações enzimáticas, assim como para a determinação de prata. Puyol e colaboradores 28,29 também propuseram cromoionóforos derivados de nortricarbocianinas, com máximos de absorção na faixa de 785 a 830 nm, 28 assim como derivados de norcianinas, com máximos de absorção entre 648 e 821 nm, 29 para a determinação de pH. Os pigmentos sintetizados apresentaram alta sensibilidade e diferentes valores de pKa, possibilitando o desenvolvimento de sensores ópticos para uma ampla faixa de pH.…”
Section: Reagentes E Novos Materiaisunclassified