Abstract This article reports the synthesis and characterization of a quantum-confined luminescent dot with size 2–3 nm using well-defined
m-octa(bromophenyl) silsesquioxane (m-OBPS) as core. The highly regioselective bromination of octaphenylsilsesquioxane (OPS), which is an electron-deficient nanometer-sized
molecule, has been synthesized using combined catalyst of iodine and zinc chloride at room temperature in dichloromethane
solvent. Based on m-OBPS, a hybrid luminescent dot with well-defined structure was synthesized. UV absorption and PL spectra of this light-emitting
dot remain same in dilute solution, condensed state, and solid solution. Furthermore, time-resolved PL study indicates that
the exciton decay time of the light-emitting dot remains similar regardless in dilute solution, condensed state, or blended
with other polymers, suggesting that the charge carriers are well confined within the individual light-emitting dot due to
the unique star-like structure and shielding alkyl chain layer. The light-emitting nano-particles can be considered as isolated
chromophores as both inter- and intra- molecular aggregation are prohibited.
m-octa(bromophenyl) silsesquioxane (m-OBPS) as core. The highly regioselective bromination of octaphenylsilsesquioxane (OPS), which is an electron-deficient nanometer-sized
molecule, has been synthesized using combined catalyst of iodine and zinc chloride at room temperature in dichloromethane
solvent. Based on m-OBPS, a hybrid luminescent dot with well-defined structure was synthesized. UV absorption and PL spectra of this light-emitting
dot remain same in dilute solution, condensed state, and solid solution. Furthermore, time-resolved PL study indicates that
the exciton decay time of the light-emitting dot remains similar regardless in dilute solution, condensed state, or blended
with other polymers, suggesting that the charge carriers are well confined within the individual light-emitting dot due to
the unique star-like structure and shielding alkyl chain layer. The light-emitting nano-particles can be considered as isolated
chromophores as both inter- and intra- molecular aggregation are prohibited.
- Content Type Journal Article
- Category Research Paper
- DOI 10.1007/s11051-010-9857-x
- Authors
- Yang Xiao, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore
- Xuehong Lu, Nanyang Technological University School of Materials Science and Engineering 50 Nanyang Avenue Singapore 639798 Singapore
- Xinhai Zhang, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore
- Chaobin He, Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) 3 Research Link Singapore 117602 Singapore
- Journal Journal of Nanoparticle Research
- Online ISSN 1572-896X
- Print ISSN 1388-0764
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