Aggregation-enhanced two-photon absorption and up-converted fluorescence of quadrupolar 1,4-bis(cyanostyryl) benzene derivatives showing solvatochromic fluorescence

Cited 59 time in webofscience Cited 0 time in scopus
  • Hit : 464
  • Download : 0
This paper reports synthesis and semiempirical modeling of 1,4-bis(cyanostyryl) benzene (CSB)-based quadrupolar isomeric molecules (alpha-and beta-CSB-TPs), designed to produce enhancement in fluorescence quantum yield and two-photon absorption cross-sections for the nanoaggregate form. Fluorescence yield together with high two-photon optical properties of the isomers have been fine-tuned by moving the cyano group from alpha to beta position, which results in longer absorption-fluorescence wavelengths, and higher one-and two-photon absorptivities for the beta-CSB-TP. In nonpolar toluene solution, both isomers exhibit strong one-and two-photon induced fluorescence. Both isomers followed a trend of strong solvatochromisms which was gradually on increasing solvent polarity. Aqueous dispersions of nanoparticles with diameters of ca. 150 nm have been prepared by aggregation of each isomer. The quenched fluorescence in polar media was greatly intensified followed by a 21 fold increase in TPA cross-sections. This helped achieve intense up-converted fluorescence by two-photon absorption of excited beta-CSB-TP organic nanoparticles. Coaggregation-enhanced tunable fluorescence has also been demonstrated as a possible application of the isomeric alpha-and beta-CSB-TP mixture.
Publisher
Royal Soc Chemistry
Issue Date
2010-08
Language
English
Article Type
Article
Keywords

OPTICAL-DATA STORAGE; EXCITATION CROSS-SECTIONS; POWER-LIMITING PROPERTIES; POLYMERIC MATERIAL; ORGANIC-COMPOUNDS; CHROMOPHORES; MICROFABRICATION; FLUOROPHORES; MOLECULES; EMISSION

Citation

JOURNAL OF MATERIALS CHEMISTRY, v.20, no.35, pp.7422 - 7429

ISSN
0959-9428
DOI
10.1039/c0jm00716a
URI
http://hdl.handle.net/10203/102075
Appears in Collection
CH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 59 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0