title: Silica cross-linked nanoparticles encapsulating fluorescent conjugated dyes for energy transfer-based white light emission and porphyrin sensing.
abstract: This work demonstrated that water-soluble fluorescent hybrid materials can be successfully synthesized by use of silica cross-linked micellar nanoparticles (SCMNPs) as scaffolds to encapsulate fluorescent conjugated dyes for pH sensing, porphyrin sensing and tunable colour emission. Three dyes were separately encapsulated inside SCMNPs (short to dye-SCMNPs). Each of the dye-SCMNPs indicated longer lifetime in water than that of free dye dissolved in organic solvent. The 7-(hexadecyloxy) coumarin-3-ethylformate (HCE) encapsulated inside SCMNPs (HCE-SCMNPs) exhibited fluorescence quenching by pH change in aqueous media. Furthermore, it was confirmed that the radiative and nonradiative energy transfer processes both occurred between HCE-SCMNPs and tetraphenyl-porphyrin (TPP), which were used to synthesize the water-soluble TPP sensor. Significantly, HCE-SCMNPs doped with 5,12-dicotyl-quinacridone (8CQA) and TPP showed water-soluble white light emission (CIE (0.29, 0.34)) upon singlet excitation of 376 nm due to colour adjustment of 8CQA and energy transfer from HCE (donor) to TPP (acceptor).
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
authors.forename: Fangyuan
authors.initials: F
authors.lastname: Gai
authors.forename: Tianlei
authors.initials: T
authors.lastname: Zhou
authors.forename: Ligong
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.forename: Weijia
authors.initials: W
authors.lastname: Hou
authors.forename: Xinchun
authors.initials: X
authors.lastname: Yang
authors.forename: Yantao
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Zhao
authors.forename: Da
authors.initials: D
authors.lastname: Xu
authors.forename: Yunling
authors.initials: Y
authors.lastname: Liu
authors.forename: Qisheng
authors.initials: Q
authors.lastname: Huo
mesh_terms: D003374:Coumarins / Q000737:chemistry; D004735:Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008027:Light; D008823:Micelles; D053758:Nanoparticles / Q000737:chemistry*; D011166:Porphyrins / Q000032:analysis*; D012822:Silicon Dioxide / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D003374:Coumarins; D005456:Fluorescent Dyes; D008823:Micelles; D011166:Porphyrins; D012822:Silicon Dioxide; C030123:coumarin