Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 585, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2019.124112
Keywords
Polymer dots; PAMAM; C=N bond; Fluorescent mechanism; Fluorescence probe
Categories
Funding
- National Natural Science Foundation of China [21875085, 81602659]
- Graduate Student Innovation Research Project of Northeast Petroleum University [JYCX_CX03_2018]
- State Key Laboratory Opening Project Foundation of Jilin University (2018-16)
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A green emiting polymer dots (PDs) were obtained via a hydrothermal method from 1.0 G PAMAM-NH2 and DKG (oxidated AA), with a quantum yield of 18.7%. The intrinsic strong fluorescence originates from imines and the special structure of PAMAM-DKG, endowsing the obtained PAMAM-DKG PDs with pH- and temperature-responsive properties, which can provide a new perspective for further develop this approach in biology and pharmaceuticals with compounds containing unsaturated structure. The fluorescence of PAMAM-DKG PDs were enhanced by C=N bond formation with a crosslinking process, and the fluorescence tansformed into weak and blue when destruction of C=N bond occurred. In addition, PAMAM-DKG PDs is a potential fluorescence probe for Cu2+ detection in aqueous media.
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