Iron( III)-Quantity-Dependent Aggregation-Dispersion Conversion of Functionalized Gold Nanoparticles
2014 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 20, no 14, 4032-4037 p.Article in journal (Refereed) Published
Developing gold nanoparticles (AuNPs) with well-designed functionality is highly desirable for boosting the performance and versatility of inorganic-organic hybrid materials. In an attempt to achieve ion recognition with specific signal expressions, we present here 4-piperazinyl-1,8-naphthalimide-functionalized AuNPs for the realization of quantitative recognition of Fe-III ions with dual (colorimetric and fluorescent) output. The research takes advantage of 1)quantity-controlled chelation-mode transformation of the piperazinyl moiety on the AuNPs towards Fe-III, thereby resulting in an aggregation-dispersion conversion of the AuNPs in solution, and 2)photoinduced electron transfer of a naphthaimide fluorophore on the AuNPs, thus leading to reversible absorption and emission changes. The functional AuNPs are also responsive to pH variations. This strategy for realizing the aggregation-dispersion conversion of AuNPs with returnable signal output might exhibit application potential for advanced nanoscale chemosensors.
Place, publisher, year, edition, pages
2014. Vol. 20, no 14, 4032-4037 p.
gold, iron, nanoparticles, sensors, surface plasmon resonance
IdentifiersURN: urn:nbn:se:kth:diva-144931DOI: 10.1002/chem.201303958ISI: 000333447200022ScopusID: 2-s2.0-84897916341OAI: oai:DiVA.org:kth-144931DiVA: diva2:716099
QC 201405082014-05-082014-05-052014-05-08Bibliographically approved