TY - JOUR
T1 - Optical properties of a two-photon chromophore in a polymeric nanostructure
AU - Nag, Okhil Kumar
AU - Woo, Han Young
N1 - Funding Information:
This work was supported for 2 years by Pusan National University Research Grant.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/3/1
Y1 - 2012/3/1
N2 - Optical properties of a cationic two-photon absorption (TPA) chromophore, 1,4-bis{4′-[N,N-bis(6′′-trimethylammoniumhexyl)amino]styryl} benzene tetrabromide (C1) upon complexation with an anionic diblock copolymer, poly[(ethylene oxide)-block-(sodium 2-acrylamido-2-methyl-1-propane sulfonate)] (E m-A n) and a cationic surfactant, cetyltrimethylammonium bromide (CTAB) have been studied. Electrostatic interaction among C1, cationic CTAB and anionic (E m-A n) forms a vesicular polymeric nanostructure (containing C1 in a core), which is soluble in water. Incorporation of C1 into the nonpolar microenvironment inside the nanostructure successfully modulated its optical properties in aqueous medium. In water, fluorescence quantum yield (η) of C1 (0.32) was increased up to 0.55 accompanied with 30∼40 nm PL photoluminescence (PL) spectral shifts by forming the self-assembled nanostructure. This vesicular nanostructure may have a potential application as a two-photon molecular tag for biological imaging by two-photon microscopy.
AB - Optical properties of a cationic two-photon absorption (TPA) chromophore, 1,4-bis{4′-[N,N-bis(6′′-trimethylammoniumhexyl)amino]styryl} benzene tetrabromide (C1) upon complexation with an anionic diblock copolymer, poly[(ethylene oxide)-block-(sodium 2-acrylamido-2-methyl-1-propane sulfonate)] (E m-A n) and a cationic surfactant, cetyltrimethylammonium bromide (CTAB) have been studied. Electrostatic interaction among C1, cationic CTAB and anionic (E m-A n) forms a vesicular polymeric nanostructure (containing C1 in a core), which is soluble in water. Incorporation of C1 into the nonpolar microenvironment inside the nanostructure successfully modulated its optical properties in aqueous medium. In water, fluorescence quantum yield (η) of C1 (0.32) was increased up to 0.55 accompanied with 30∼40 nm PL photoluminescence (PL) spectral shifts by forming the self-assembled nanostructure. This vesicular nanostructure may have a potential application as a two-photon molecular tag for biological imaging by two-photon microscopy.
KW - Bioimaging
KW - two-photon absorption
KW - two-photon fluorophore
KW - two-photon microscopy
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U2 - 10.1080/15421406.2012.633045
DO - 10.1080/15421406.2012.633045
M3 - Article
AN - SCOPUS:84855948183
VL - 554
SP - 65
EP - 71
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
ER -