NRET from naphthalene labels in multilayer shell wall on melamine formaldehyde microparticles fabricated with layer-by-layer self-assembly to pyrene-labeled polyelectrolyte in solution

作者：Liu SS; Wang CY; Liu XX; Tong Z^*; Ren BY; Zeng F

来源：European Polymer Journal, 2006, 42(1): 161-166.

DOI：10.1016/j.eurpolymj.2005.06.027

• polyelectrolyte multilayers
• core-shell colloidal particles
• NRET
• layer-by-layer

Core-shell colloidal particles were prepared with the core of monodisperse melamine formaldehyde particles (MF) with a diameter of 3.5 mu m. The shell deposited on the core by the layer-by-layer (LbL) self-assembly was made with a copolymer ANp3 of 2-acrylamido-2-methylpropanesulfonate sodium (AMPS) and 3 mol% naphthalene label monomer and poly(diallyldimethylammonium chloride) (PD). Nonradiative energy transfer (NRET) from the naphthalene labels deposited on the MF particles to pyrene labels at a polyelectrolyte APy3, a copolymer of AMPS and 3 mol% pyrene label monomer, or to an ionic pyrene probe 1-pyrenemethylamine hydrochloride (PyMeA (.) HCl) in water was observed. The NRET efficiency was expressed as the emission intensity ratio I/I-0 of naphthalene with and without existence of pyrene in the surrounding solution. With increasing pyrene concentration, I/I-0 decreased down to about 0.2 and the mechanism for this NRET from the inner naphthalene label to the pyrene labels in solution is still ambiguous.

• 出版日期2006-1
• 单位华南理工大学