ICCAS OpenIR
Synthesis of a new water-soluble polymeric probe and its fluorescent properties for ratiometric measurement of near-neutral pH
Dong, SY; Ma, HM; Li, XH; Sun, M; Duan, XJ
2004-11-01
Source PublicationANALYTICAL LETTERS
ISSN0003-2719
Volume37Issue:14Pages:2937-2948
AbstractA new water-soluble polymeric fluorescent probe, poly [allylamine-co-N-4-chloro-6-(4-methylcoumarin-7-oxy)-1,3,5-triazinylallylamine] (PA-TMC), has been designed and characterized for near neutral pH measurement in dual-excitation ratio application. The probe was synthesized by using cyanuric chloride as a linker, 7-hydroxy-4-methyl-coumarin as a fluorophore, and polyallylamine as a water-soluble molecular scaffold. It showed a large pH-dependent shift of excitation peak from 320 to 360 nm with no change of emission wavelength of 448 nm. The pK(a) value of the probe was 7.56, and the ratio R (I-360/I-320) of fluorescence intensities at the two excitation wavelengths of 360 nm and 320 nm was directly proportional to pH values over the range 6.8-8.5, which may be suitable for the pH monitoring of near-neutral systems. Spectroscopic properties of the probe were also compared with the corresponding low molecular weight 7-(4,6-dichloro-1,3,5-triazinoxy)-4-methyl-coumarin (TMC). The results showed that the incorporation of TMC into a water-soluble polymer bearing a large number of hard base ligands offers both considerably improved selectivity for H+ and solubility in water, suggesting that such measure may be useful for preparing other probes with special functions.
KeywordWater-soluble Polymeric Fluorescent Probe Ph Ratiometric Measurement Fluorescence
DOI10.1081/AL-200035845
Indexed BySCI
Language英语
WOS IDWOS:000225605100005
PublisherMARCEL DEKKER INC
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81536
Collection中国科学院化学研究所
Corresponding AuthorMa, HM
AffiliationChinese Acad Sci, Inst Chem, Biol Chem Lab, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Dong, SY,Ma, HM,Li, XH,et al. Synthesis of a new water-soluble polymeric probe and its fluorescent properties for ratiometric measurement of near-neutral pH[J]. ANALYTICAL LETTERS,2004,37(14):2937-2948.
APA Dong, SY,Ma, HM,Li, XH,Sun, M,&Duan, XJ.(2004).Synthesis of a new water-soluble polymeric probe and its fluorescent properties for ratiometric measurement of near-neutral pH.ANALYTICAL LETTERS,37(14),2937-2948.
MLA Dong, SY,et al."Synthesis of a new water-soluble polymeric probe and its fluorescent properties for ratiometric measurement of near-neutral pH".ANALYTICAL LETTERS 37.14(2004):2937-2948.
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