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һƪ£ºSynthesis and characterization of fluorescent PEG-polyurethane
with free carboxyl groups
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http://good.gd/2469405.htm

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FN Thomson Reuters Web of Knowledge
VR 1.0
PT  J
AU  Yang, HY
Zhang, XM
Duan, LJ
Zhang, MY
Gao, GH
Zhang, HX
AF  Yang, Hong Yu
Zhang, Xiu Mei
Duan, Li Jie
Zhang, Ming Yao
Gao, Guang Hui
Zhang, Hui Xuan
TI  Synthesis and characterization of fluorescent PEG-polyurethane with free carboxyl groups
SO  JOURNAL OF POLYMER RESEARCH
AB  A series of fluorescent multiblock PEG-polyurethane copolymers with free carboxyl groups were synthesized by one-step method and their chemical structure and properties were investigated. The multiblock PEG-polyurethane copolymers were composed of poly(ethylene glycol) (PEG), 1,6-hexamethylene diisocyanate, 2,2-bis (hydroxymethyl) propionic acid and a fluorescent dye erythrosine B (EB). The resulting polymers were examined by 1HNMR, FT-IR, gel permeation chromatography (GPC), ultraviolet visible spectroscopy (UV-vis), fluorescent spectroscopy. As a result, the UV-vis spectra showed that EB can be successfully conjugated into PEG-polyurethane during the one-step reaction. And the UV absorption peaks of samples were blue-shift and strengthened with decreasing of pH values, indicating that PEG-polyurethane-EB can be a pH-dependent fluorescent probe in a broad pH range. We expect that more applications would be possible for the fluorescent PEG-polyurethane with free carboxyl groups owing to its free functional groups and simultaneously imaging along with pH values.
TC  1
Z9  1
SN  1022-9760
PD  SEP
PY  2012
VL  19
IS  9
AR  9973
DI  10.1007/s10965-012-9973-7
UT  WOS:000308540500001
ER  

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